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Below are preliminary entrants for the 2026 Lottery (December 6, 2025). The Ticket Count refers to the fact that lottery applicants receive additional chances in the drawing for each failure to gain entry in a prior year at 2^(n-1) where n is the number of years entering the lottery. These are preliminary ticket counts.
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| ID | Last Name | First Name | Gender | State | Country | Tickets | Qualifier |
|---|---|---|---|---|---|---|---|
| 127440 | (Schreiber) Defayette | Zofia | F | MA | US | 1 | Rabid Raccoon 100M 2025 (36 hours) |
| 105955 | Aagaard | Jakob | M | NJ | US | 128 | Grindstone by UTMB 100km 2025 (18 hours) |
| 116369 | Aakre | Blair | M | CO | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 119608 | Aamodt | Tait | M | Utah | US | 2 | Wasatch Front 100M 2025 (36 hours) † |
| 116292 | Abarca | Sergio | M | AZ | US | 2 | Black Canyon 100km 2025 (17 hours) |
| 114567 | ABE | MOTONORI | M | TOKYO | JP | 8 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 114545 | Abe | Shinya | M | Kanagawa-pref. | JP | 8 | Mt Fuji 100M 2025 (46 hours) |
| 127199 | Abedi | Aiman | M | CA | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 109592 | Abele Plaza | Christian | M | Madrid | ES | 1 | Western States 100M 2025 (30 hours) † |
| 111206 | Abolfathi | Maryam | F | California | US | 8 | Leona Divide 100M 2025 (33 hours) † |
| 126820 | Abrahamson | Greg | M | CO | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 126450 | Abrantes | Marta | F | Lisboa | PT | 1 | TOR130 - Tot Dret 130km 2025 (44 hours) |
| 127039 | achard | lio | M | West Yorkshire | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 116852 | Ackermann | Nicholas | M | TX | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 127685 | Acosta | Jake | M | CA | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 127773 | Acosta | Joshua | M | AZ | US | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 123960 | Adam | Philipp | M | RLP | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 118661 | Adamo | Ellen | F | MO | US | 2 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 105259 | Adams | Amy | F | MD | US | 64 | Bear, The 100M 2025 (36 hours) † |
| 121778 | Adams | Bryce | M | British Columbia | CA | 2 | Fat Dog 100km 2025 (24 hours) |
| 103721 | Adams | Chas | M | OH | US | 64 | Pinhoti 100M 2025 (32 hours) † |
| 105705 | Adams | Cherry Rose | F | CO | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 114775 | Adams | David | M | Scotland | GB | 4 | Swiss Alps 100M 2025 (50 hours) |
| 104443 | Adams | Drew | M | ID | US | 32 | Hardrock 100M 2025 (48 hours) † |
| 118204 | Adams | Gregory | M | Georgia | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 105692 | Adams | Holly | F | GA | US | 64 | Georgia Death Race 74M 2025 (24 hours) † |
| 107767 | Adams | Jared | M | NSW | AU | 8 | Surf Coast Century 100km 2025 (17 hours) |
| 112469 | Adams | John | M | Newfoundland | CA | 8 | Black Canyon 100km 2025 (17 hours) † |
| 115441 | Adams | Joseph | M | Pennsylvania | US | 4 | Worlds End 100km 2025 (19 hours) |
| 122797 | Adams | Joshua | M | Washington | US | 2 | Pinhoti 100M 2025 (32 hours) |
| 115448 | ADAMS | JUSTIN | M | WA | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 118112 | Adams | Lorna | F | Buckinghamshire | US | 4 | Hardwolds 80M 2024 (24 hours) |
| 118278 | Adams | Taylor | M | CA | US | 4 | Sean O'Brien 100km 2025 (17 hours) † |
| 108763 | Addams | Lee | M | NE | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 103843 | Addison | Julia | F | CA | US | 64 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 124260 | Adducchio | Sara | F | OH | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 115716 | ADE | GRÉGORY | M | Hauts de Seine | FR | 4 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 123918 | ADELHANOFF | NICOLAS | M | Rhône | FR | 1 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 114319 | Adkins | John | M | Bristol | GB | 4 | Autumn 100M 2025 (28 hours) |
| 113513 | Adkins | Phillip | M | MI | US | 8 | Cascade Crest 100M 2025 (34 hours) |
| 113335 | Adlong | Daniel | M | California | US | 8 | Bear, The 100M 2025 (36 hours) † |
| 124007 | Adrian | Scott | M | North Yorkshire | GB | 1 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 125930 | Aeschbacher | Mike | M | Aargau | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 103123 | Affleck | Nick | M | CA | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 112068 | Afonso | Carlos | M | Santa Cruz de Tenerife | ES | 8 | Azores Trail Run (Whalers' Great Route) 118km 2025 (26 hours) |
| 125582 | Afzal | Kareem | M | PA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 114380 | Agassis | Nicolas | M | Vaud | CH | 2 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 124459 | Agharbi | Hamza | M | California | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 115312 | Agnew | Darren | M | High peak | GB | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 116032 | Agojo | Peaches | F | CA | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 122547 | Agrech | Pierre | M | Loire Atlantique | FR | 2 | Transgrancanaria 125km 2025 (28 hours) |
| 126001 | Aguanno | Robert | M | New York | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 103299 | Aguayo | David | M | CA | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 125009 | Aguiar | Zachery | M | MD | US | 1 | Eastern States 100M 2025 (36 hours) |
| 126039 | Aguilera | Nico | F | Nevada | US | 1 | Mountain Lakes 100M 2025 (30 hours) † |
| 109397 | Aguilera Carrasco | Rafael Fernando | M | huelva | ES | 8 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 124353 | aguirre | andreas | M | ca | US | 1 | Superior 100M 2025 (38 hours) |
| 114161 | Agulov | Egor | M | CA | US | 8 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 126182 | Agustin Carmona | Carlos | M | Teruel | ES | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 125487 | Ahler | Sean | M | Wisconsin | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 125162 | Ahles | Forrest | M | TN | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 118210 | Ahlgren | Travis | M | CA | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 101787 | Aho | Janne | M | SWE | SE | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 118491 | Ahonen | Mikko | M | Uusimaa | FI | 2 | Istria by UTMB 168km 2025 (46 hours) |
| 111330 | Ahuja | Sonia | F | Tennessee | US | 2 | Leona Divide 100km 2025 (17 hours) |
| 119032 | Aikens | Brian | M | PA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 118091 | Aikman | Erica | F | MI | US | 4 | Tunnel Hill 100M 2024 (30 hours) † |
| 108860 | Ainge | Timothy | M | British Columbia | CA | 16 | Lost Soul Ultra 100km 2025 (21 hours) |
| 124999 | Ainsworth | Imogen | F | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 118305 | Airault | Ferdinand | M | New York | US | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 115240 | Aitelhocine | Fabrice | M | Ile De France | FR | 4 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 117700 | AIZAWA | Akimichi | M | GUMMA | JP | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 105261 | Aizawa | Yuuki | M | JPN | JP | 16 | Lake Biwa 100M 2025 (52 hours) |
| 121000 | Akashi | Akiko | F | NSw | AU | 2 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 120313 | Akber | Sarah | F | Ohio | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 124531 | Akemann | Camille | F | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 109922 | Akioyamen | Faith | F | Texas | US | 1 | Western States 100M 2025 (30 hours) † |
| 113594 | Akley | Nicholas | M | CO | US | 8 | Never Summer 100km 2025 (23 hours) |
| 113717 | Akrigg | Roderick | M | AB | CA | 8 | Fat Dog 120M 2025 (48 hours) † |
| 126722 | Aksan | Efe | M | İstanbul | TR | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 114023 | Al Thani | Abdulla | M | DOHA | QA | 4 | Morenic Trail 119km 2025 (22 hours) |
| 126948 | Alan | Thomas | M | california | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 126377 | Alaniz | Veronica | F | CA | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 111694 | Albanese | Carson | M | New York | US | 4 | Bigfoot 206M 2025 (100 hours) † |
| 120637 | Albanesi | Stefania | F | FL | US | 2 | Black Canyon 100km 2025 (17 hours) |
| 117979 | Alber | Dan | M | Mi | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124794 | Alberghini | Jeffrey | M | WI | US | 1 | Hennepin 100M 2025 (30 hours) |
| 102963 | Albert | Dan | M | TN | US | 64 | No Business 100M 2025 (34 hours) |
| 107760 | Albert | Jacob | M | IL | US | 8 | Hennepin 100M 2025 (30 hours) |
| 105222 | Albert | Jeff | M | CO | US | 64 | Long Haul 100M 2025 (30 hours) † |
| 125864 | Albertson | Daniel | M | UT | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 107639 | Albertus | Cleo | F | Western Cape | ZA | 2 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 120385 | Alcaide Fernandez | Isaac | M | England | GB | 2 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 125535 | Alcantara | Felix | M | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 125636 | Alderson | Donald | M | CA | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 104920 | Aldous | Jay | M | CHE | CH | 32 | Swiss Canyon Trail 111km 2025 (24 hours) |
| 120985 | Aldridge | James | M | NC | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 106536 | Alevisos | Georg | M | GRC | GR | 64 | Okushinano 100km 2025 (21 hours) |
| 100438 | Alexander | Jesse | M | AZ | US | 256 | Quicksilver 100km 2025 (17 hours) † |
| 126527 | Alexander | Lorie | F | Canada | CA | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 119677 | Alexander | Nathan | M | AR | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 125136 | Alexander | Trevor | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 111321 | Alfaro | Manuel | M | Flores | CR | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 127548 | Ali | Alexis | M | Santa Fe | AR | 1 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 105374 | Ali | Shahid | M | OR | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 101084 | Alimonos | Costa | M | OH | US | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 119819 | Aliprandi | Manuel | M | ZH | CH | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125431 | Alix | Elise | F | NY | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 126127 | alizadeh | claudia | F | NJ | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 127294 | alla | tony | M | Tahiti | PF | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 125874 | Allaben | Sarah | F | Washington | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 102141 | Allamon | David | M | AZ | US | 256 | Rio Del Lago 100M 2025 (30 hours) |
| 121655 | Allegretti | Paul | M | CA | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 120379 | Allemand | Christie | F | WA | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 119510 | Allen | Adam | M | Wellington | NZ | 1 | Taupo 100km 2025 (17 hours) |
| 107522 | Allen | Chad | M | Wa | US | 16 | IMTUF 100M 2025 (36 hours) † |
| 122790 | Allen | Christopher | M | IL | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 123950 | Allen | Dion | M | Queensland | AU | 1 | Blackall 100km 2025 (18 hours) |
| 112287 | Allen | James | M | Manchester | GB | 8 | Valleys Ultra (13) 180km 2025 (46.5 hours) |
| 102539 | Allen | Jeff | M | SC | US | 256 | Bighorn 100M 2025 (35 hours) |
| 111903 | Allen | Jennifer | F | MT | US | 8 | Leadville Trail 100M 2025 (30 hours) |
| 120093 | Allen | Krista | F | Ontario | CA | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 118142 | allen | missy | F | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 126379 | Allen | Mitchell | M | ID | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 110500 | Allen | Nick | M | California | US | 16 | Angeles Crest 100M 2025 (36 hours) † |
| 124915 | Allen | Penelope | F | MT | US | 1 | Fat Dog 100km 2025 (24 hours) |
| 120301 | Allen | Phil | M | CO | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 125644 | Allen | Richard | M | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 116823 | Allen | Sanna | F | South Karelia Region | FI | 2 | Dinosaur Valley 100M 2024 (35 hours) † |
| 124660 | Allen | Zachary | M | TN | US | 1 | Mamba 100M 2024 (34 hours) † |
| 104122 | Alles | Christian | M | DEU | DE | 2 | Nuts Ylläs Pallas 100km 2025 (22 hours) |
| 117629 | Alli | Ahmad | M | Ontario | CA | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 109034 | Allison | Keith | M | BC | CA | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 116407 | Allison | Lindsay | F | CO | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 127732 | Allread | Jesse | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 125532 | Alman | Lindsey | F | WI | US | 1 | Kettle Moraine 100M 2025 (30 hours) |
| 127563 | Almiron | Nicolas | M | Buenos Aires | AR | 1 | Ultra Trail Amanecer Comechingón 100km 2025 (26 hours) |
| 117540 | Almond | Christine | F | BC | CA | 4 | Sedona Canyons 125M 2025 (52 hours) |
| 124778 | Alotto | Oliviero | M | Italy | IT | 1 | Tuscany Crossing 160km 2025 (35 hours) |
| 127646 | alquier | mathieu | M | France | FR | 1 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 127209 | Alred | Ian | M | Colorado | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 126511 | Alsch | Ryan | M | New Mexico | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 100396 | Alsip | Jonathan | M | MI | US | 16 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 125916 | Alston | Catherine | F | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 114954 | Alta | Eric | M | WI | US | 4 | Beaverhead 100km 2025 (20 hours) |
| 123970 | Altach | Johannes | M | Niedersachsen | DE | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 126667 | Alter | Liz | F | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 120345 | Althuis | Jente Marit | F | Geneva | CH | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 124496 | Alvarado | Francisco | M | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 101955 | Alvarado | Megan | F | VA | US | 8 | Yeti Virginia 100M 2025 (30 hours) |
| 112241 | Alvarez | Fernando | M | Parma | IT | 4 | Abbots Way 100km 2025 (22 hours) |
| 107149 | Alverson | Brandon | M | Florida | US | 8 | Mohican 100M 2025 (32 hours) |
| 117948 | Alzayer | Hadi | M | Eastern Province | SA | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 124611 | Aman | Ian | M | Alberta | CA | 1 | Tahoe 202M 2025 (100 hours) † |
| 119355 | Amaral | Eduardo | M | MG | BR | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 117434 | Amarasinghe | Barushi | M | Colombo | LK | 2 | Massanutten 100M 2025 (36 hours) |
| 117866 | Amato | Anthony | M | New Jersey | US | 2 | Hellbender 100M 2025 (40 hours) † |
| 114882 | Ambrosini | Davide | M | Italy | IT | 4 | Ultra Trail Vipava Valley 106km 2025 (25 hours) |
| 120321 | ambrosini | jacopo | M | italia | IT | 2 | Tuscany Crossing 160km 2025 (35 hours) |
| 122271 | Ambrus de Moraes | Pedro | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 107221 | ambs | brian | M | ohio | US | 4 | Cruel Jewel 106M 2025 (48 hours) † |
| 111292 | Aminzade | Daniel | M | CA | US | 8 | Quicksilver 100km 2025 (17 hours) † |
| 101653 | Amital | Chuck | M | CA | US | 32 | Rio Del Lago 100M 2025 (30 hours) |
| 114586 | Ammons | Kim | F | CA | US | 2 | Sean O'Brien 100km 2025 (17 hours) † |
| 103619 | Amneskog | Tomas | M | SWE | SE | 4 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 117229 | Amo | wayne | M | ca | US | 2 | San Diego 100M 2025 (32 hours) † |
| 117242 | Amonette | Matthew | M | Virginia | US | 4 | Massanutten 100M 2025 (36 hours) † |
| 122273 | Amor | Horacio | M | San Luis | AR | 2 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 125608 | Amundsen | Finn | M | Syddanmark | DK | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125655 | Amundsen | Leiv | M | Oslo | NO | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 123576 | Ancelsti | Marino | M | VA | IT | 1 | Tuscany Crossing 103km 2025 (21 hours) |
| 106409 | Anderlitch | Kenneth | M | TX | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 114925 | Anders | Jette | F | Hessen | DE | 4 | Tuscany Crossing 103km 2025 (21 hours) |
| 122310 | Andersen | Andreas Ladefoged Møller | M | Østjylland | DK | 2 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 120696 | Andersen | Jenifer | F | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 100042 | Anderson | Colin J | M | SCOTLAND | GB | 1 | Western States 100M 2025 (30 hours) † |
| 115944 | Anderson | Craig | M | NM | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 118925 | Anderson | Daniel | M | OK | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 124702 | Anderson | Deborah | F | CO | US | 1 | Moab 238M 2025 (108 hours) † |
| 122168 | Anderson | Isaac | M | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 127169 | Anderson | Jacey | F | NC | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 106679 | Anderson | Janice | F | GA | US | 16 | Tunnel Hill 100M 2024 (30 hours) † |
| 104482 | Anderson | John | M | CA | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 116533 | Anderson | Joseph | M | Tennessee | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 104233 | Anderson | Katy | F | NSW | AU | 8 | Leadville Trail 100M 2025 (30 hours) |
| 105033 | Anderson | Kayde | F | CO | US | 16 | Leadville Trail 100M 2025 (30 hours) |
| 123923 | Anderson | Keil | M | HI | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 109724 | Anderson | Mike | M | KY | US | 16 | Canal Corridor 100M 2025 (30 hours) † |
| 103711 | Anderson | Nathan | M | MA | US | 32 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 124323 | Anderson | Peter | M | Ohio | US | 1 | Burning River 100M 2025 (30 hours) |
| 125119 | Anderson | Ross | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 118901 | Anderson | Ryan | M | WA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 111839 | Anderson | Ryan | M | ID | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 107649 | Anderson | Spencer | M | Oregon | US | 16 | Miwok 100km 2025 (15:30:59 hours) |
| 120730 | Anderson | Ted | M | CA | US | 2 | Angeles Crest 100M 2025 (36 hours) † |
| 115159 | Anderson | Tom | M | Qld | AU | 4 | Ultra-Trail Cape Town 100M 2024 (45 hours) |
| 121329 | Andersson | Erik | M | New York | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 105115 | Andersson | Oscar | M | SWE | SE | 32 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 106681 | Andersson | Steven | M | Minnesota | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 127185 | Ando | Alessandro | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 111263 | Andreas | Justin | M | Alaska | US | 8 | Kettle Moraine 100M 2025 (30 hours) † |
| 119015 | Andres | Kyle | M | UT | US | 4 | Bear, The 100M 2025 (36 hours) † |
| 124213 | ANDREUCCI | Clément | M | France | FR | 1 | Grand Raid Ventoux by UTMB 124km 2025 (30 hours) |
| 108715 | Andrews | Chris | M | CA | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 126615 | Andrews | Cutler | M | GA | US | 1 | Cruel Jewel 106M 2025 (48 hours) † |
| 103636 | Andrews | Glen | M | AUS | AU | 8 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 127090 | Andrews | Joseph | M | England | GB | 1 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 hours) |
| 125667 | Andrews | Krystle | F | GA | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 126731 | Andriacchi | Katie | F | NV | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 109940 | Andric | Mirko | M | Massachusetts | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126228 | Andron | Paul | M | DC | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 114872 | Andrzejewski | Karl | M | Texas | US | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 100176 | Ang | Choo Siong Alex | M | SGP | SG | 64 | Hong Kong 100K 100km 2025 (23 hours) |
| 102881 | Angara | Ric | M | IL | US | 256 | Tunnel Hill 100M 2024 (30 hours) † |
| 122066 | Ange | Serradji | M | Auvergne-Rhône-Alpes | FR | 2 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 126108 | Angelino | Alessandro | M | Italia | US | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 109857 | Angell | Rich | M | OH | US | 16 | Eastern States 100M 2025 (36 hours) |
| 124302 | Angerhofer | Mani | M | TX | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 125023 | Anglin | Jacqueline | F | CA | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 120540 | Angotti | David | M | Tennessee | US | 2 | Wasatch Front 100M 2025 (36 hours) † |
| 122452 | Anguita Bayo | Manuel | M | Andalucía | ES | 2 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 111353 | Angwin | Marcus | M | Victoria | AU | 4 | Surf Coast Century 100km 2025 (17 hours) |
| 121066 | Anhalt | David | M | CA | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 109275 | Anleu | Erick | M | Guatemala | GT | 2 | Grindstone by UTMB 100M 2025 (36 hours) |
| 127974 | Ann Miller | Katie | F | Colorado | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 117771 | Antal | Zoltan | M | Hungary | HU | 4 | Istria by UTMB 110km 2025 (24 hours) |
| 124853 | Anthony | Deric | M | CA | US | 1 | Cocodona 250M 2025 (125 hours) |
| 118960 | Antila | Johanna | F | Vaasa | FI | 1 | Western States 100M 2025 (30 hours) † |
| 116804 | Antonisse | Drew | M | CO | US | 4 | Run Rabbit Run 100M 2025 (36 hours) † |
| 104390 | Antrobus | Shane | M | AUS | AU | 8 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 104480 | Aoyama | Tatsuro | M | JPN | JP | 1 | Western States 100M 2025 (30 hours) † |
| 126723 | Apodaca | Taylor | M | Utah | US | 1 | Bighorn 100M 2025 (35 hours) |
| 104340 | Aponte | Sarah | F | MA | US | 64 | Vermont 100M 2025 (30 hours) |
| 124205 | Applekamp | Andrew | M | MT | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 126759 | Applewhite | Cath | F | Cheshire | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 108179 | Aquilano | Shea | F | IN | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 123727 | Aquino | Jose | M | California | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123975 | Aradori | Federico | M | Italy | IT | 1 | Tuscany Crossing 103km 2025 (21 hours) |
| 127970 | ARAI | MOTOMI | M | gunma | JP | 1 | Okushinano 100km 2025 (21 hours) |
| 127360 | Arbatov | Evgeny | M | Hanoi | VN | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 127619 | Arber | Colin | M | New York | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 124131 | Arbuckle | Jefferson | M | Colorado | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 101848 | Arce | Patrick | M | FRA | FR | 16 | Gran Trail Peñalara 110km 2025 (25 hours) |
| 127658 | Archer | Kate | F | West Yorkshire | GB | 1 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 108285 | Arcidiacono | Michael | M | NC | US | 1 | Umstead 100M 2025 (30 hours) |
| 107180 | Ard | Mike | M | MT | US | 16 | Indiana 100M 2025 (30 hours) |
| 116792 | Ardanowski | Nathan | M | VA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 125796 | Ardouin | Corentin | M | Rhone | FR | 1 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 121014 | ARELLANO | DIEGO | M | jalisco | MX | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 117579 | Arend | Rob | M | AZ | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 126545 | Arfsten | Kerrin-Sina | F | MN | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 103449 | Arguello | Adam | M | NM | US | 256 | Hardrock 100M 2025 (48 hours) † |
| 116809 | Arias | Araceli | F | Mexico | MX | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 123851 | Arias | Luis | M | Florida | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 127285 | Arias Gaeta | Marcela Evelyn | F | Jalisco | MX | 1 | Puerto Vallarta by UTMB 147km 2024 (35 hours) |
| 100337 | Arias Massa | Marcelo | M | CHL | CL | 128 | Sean O'Brien 100km 2025 (17 hours) † |
| 108491 | Arias Resco | Jorge | M | Madrid | ES | 8 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 117528 | Arima | Hiroyasu | N | Kanagawa | JP | 4 | OSJ Ontake 100M 2025 (24 hours) |
| 111372 | Arimura | Takeshi | M | Kanagawa | JP | 8 | Mt Fuji 100M 2025 (46 hours) |
| 124727 | Ariso | Sofian | M | Quebec | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 126679 | Armanino | Daniel | N | WA | US | 1 | Mountain Lakes 100M 2025 (30 hours) † |
| 110378 | Armbrust | John | M | TX | US | 16 | Zion 100km 2025 (19 hours) |
| 125803 | Armijo | Jesse | M | NM | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 120602 | Armijo | Stacey | F | UT | US | 2 | Wasatch Front 100M 2025 (36 hours) † |
| 126278 | Armstrong | Alexandra | F | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 115862 | Armstrong | Catherine | F | AZ | US | 4 | Sedona Canyons 125M 2025 (52 hours) |
| 101433 | Armstrong | Jordan | F | UT | US | 16 | Bear, The 100M 2025 (36 hours) |
| 125219 | Armstrong | William | M | ON | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 120675 | Arnaudon | Maxime | M | NY | US | 2 | Vermont 100km 2025 (17 hours) |
| 110824 | Arndt | Tiemo | M | Saxony | DE | 8 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 120843 | Arneson | Philip | M | TX | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 122218 | Arnold | Careth | F | CO | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 104784 | Arnold | Daniel | M | AR | US | 1 | Western States 100M 2025 (30 hours) † |
| 103082 | Arnold | Laura | F | AR | US | 32 | Arkansas Traveler 100M 2025 (30 hours) |
| 103334 | Arnold | Melissa | F | MA | US | 2 | Vermont 100M 2025 (30 hours) |
| 127259 | ARNOUX | Alban | M | Haute Savoie | FR | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 119630 | Aron | Erika | F | CA | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 121974 | Aronsson-Storrier | Marie | F | Cork | IE | 2 | Kerry Way Ultra 193km 2025 (40 hours) |
| 125984 | ARPIN | Romain | M | Haute Savoie | FR | 1 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 125887 | Arquilevich | Max | M | CA | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 118069 | Arreola | Alejandro | M | Washington | US | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 115989 | Arriagada | Hector | M | Región Metropolitana | CL | 4 | Patagonia 110km 2025 (27 hours) |
| 124424 | Arriagada | Pete | M | IL | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 102559 | Arrington | Donna | F | AL | US | 256 | Crazy Mountain 100M 2025 (36 hours) |
| 124412 | Arrowsmith | Adam | M | OR | US | 1 | Waldo 100km 2025 (18 hours) † |
| 125503 | Arsenault | Chase | M | RI | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 127027 | Arsenault | Tanya | F | Michigan | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 126024 | Arsenault | Valérie | F | Quebec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 123484 | Arteaga | Diana | F | Azuay | EC | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 121271 | Arthur | Anthony | M | Virginia | US | 2 | Grindstone by UTMB 100M 2025 (36 hours) |
| 114606 | Arthur | Mike | M | ON | CA | 4 | No Business 100M 2025 (34 hours) |
| 116104 | Arthur | Nikki | F | Douglas | IM | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 126896 | Artigot Caballero | Patxi | M | Aragon | ES | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 115083 | Arzenton | Ivo | M | Veneto | IT | 4 | Nuts Ylläs Pallas 160km 2025 (35 hours) |
| 112967 | ASAI | MINAKO | F | TOKYO | JP | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125321 | ASAMI | NAOYA | M | kanagaw-ken | JP | 1 | Okushinano 100km 2025 (21 hours) |
| 123898 | Asano | Koichi | M | Chiba | JP | 1 | Okushinano 100km 2025 (21 hours) |
| 127131 | Ashburner | Holly | F | ACT | AU | 1 | Blackall 100km 2025 (18 hours) |
| 120679 | Ashby | Graham | M | ON | CA | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 127260 | Ashby | Ian | M | Oregon | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 121180 | Ashland | Christopher | M | Montana | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 111294 | Ashley | Craig | M | Washington | US | 8 | HOKA Bandera 100km 2025 (17 hours) |
| 112784 | Ashton | Rohan | M | Nsw | AU | 8 | Guzzler Ultra 100km 2025 (24 hours) |
| 112244 | Askew | Darla | F | OR | US | 4 | Cascade Crest 100M 2025 (34 hours) |
| 113620 | Askey | Nick | M | TX | US | 8 | Dinosaur Valley 100M 2024 (35 hours) † |
| 101090 | Asmus | Michael | M | MN | US | 64 | Bigfoot 206M 2025 (100 hours) † |
| 103447 | Asmuth | Katie | F | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 113376 | Asperski | Michal | M | - | PL | 2 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 127936 | Aspray | Emma | F | London | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 119036 | Asseer | Rudi | M | ON | CA | 2 | Grindstone by UTMB 100M 2025 (36 hours) |
| 126298 | Asselin | Cory | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 112328 | Asselin-Demers | Genevieve | F | QC | CA | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 107916 | Astle | Ron | M | CA | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 126710 | Atchison | Scott | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 101971 | Atha | Chris | M | CA | US | 16 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 100698 | Atkins | Benjamin | M | CA | US | 2 | South Downs Way 100M 2025 (30 hours) |
| 124577 | Atkins | James | M | MA | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 116503 | Atkins | Max | M | Pennsylvania | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 108621 | Atkinson | Adam | M | County Armagh | GB | 8 | San Diego 100M 2025 (32 hours) † |
| 119466 | Atkinson | Arleigh | F | Oregon | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 110067 | Atkinson | Chris | M | Waikato | NZ | 16 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 107796 | Atkinson | Karin | F | Texas | US | 8 | Dinosaur Valley 100km 2024 (22 hours) |
| 125381 | Atkinson | Theo | M | East Sussex | GB | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 120760 | Atler | Johnny | M | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 107512 | Ator | Adam | M | AZ | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 114067 | Atterberry | Emory | M | Texas | US | 8 | Leadville Trail 100M 2025 (30 hours) |
| 118710 | Au | John | M | CA | US | 4 | Patagonia 100M 2025 (42 hours) |
| 126908 | Au | Robert | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 106427 | Aubrey | Christopher | M | AB | CA | 128 | Bear, The 100M 2025 (36 hours) † |
| 100192 | Auch | Steve | M | DEU | DE | 128 | Zugspitz 100M 2025 (48 hours) |
| 109006 | Audette | Guillaume | M | Quebec | CA | 16 | Vermont 100km 2025 (17 hours) |
| 122404 | Auger | Ryan | M | WI | US | 2 | Hennepin 100M 2025 (30 hours) |
| 119991 | Augustiniak | Caitlin | F | CO | US | 2 | Rim to River 100M 2025 (32 hours) |
| 115081 | Augusto Santos | Daniel | M | Viseu | PT | 4 | Leadville Trail 100M 2025 (30 hours) |
| 120100 | Ault | Travis | M | MI | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 126746 | AUÑON CASTELLANAS | FERNANDO | M | Barcelona | ES | 1 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 125703 | Aurangzeb | Qazi | M | DE | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 125990 | Ausbun | Sherri | F | Kentucky | US | 1 | No Business 100M 2025 (34 hours) |
| 116897 | Aussieker | Michael | M | Tx | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 126328 | Austin | Cameron | M | WA | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 119861 | Austin | Chris | M | MN | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 110956 | Auston | Stephanie | F | NSW | AU | 4 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 124796 | Auth | Chris | M | WA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 114068 | Autrey | William | M | Washington | US | 4 | Cascade Crest 100M 2025 (34 hours) |
| 124720 | AUTUORI SPITZ | GUILHERME | M | RIO DE JANEIRO | BR | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 126295 | Auxier | Paul | M | WA | US | 1 | Mountain Lakes 100M 2025 (30 hours) † |
| 125856 | Avalos | Ray | M | California | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 123790 | Avat | Amaury | M | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 126395 | Avazzeri | Loïc | M | Haute-Savoie | FR | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 105388 | Avdeeva | Kseniia | F | Almaty | KZ | 16 | Salomon Ultra-Trail Hungary 112km 2025 (20 hours) |
| 126907 | avellaneda | daniel | M | Bogota | CO | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 120811 | AVERY | WAYNE | M | England | GB | 2 | Penyagolosa 106km 2025 (26 hours) |
| 114021 | Aviles martinez | Pedro | M | Puebla | MX | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 107776 | Avontuur | Antonius | M | Zuid Holland | NL | 16 | Swiss Alps 100M 2025 (50 hours) |
| 112187 | Awrey | Robert | M | OH | US | 8 | Canal Corridor 100M 2025 (30 hours) † |
| 117552 | Axelle | Nardoux | F | Haute Savoie | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 122399 | Axelrod | Sandor | M | NY | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 116651 | Axsom | Kalo | M | FL | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 116488 | AYERS | EVAN | M | Utah | US | 2 | Zion 100km 2025 (19 hours) |
| 116392 | Aylward | Peter | M | Dublin | IE | 4 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 118315 | Ayres | James | M | TX | US | 2 | Dinosaur Valley 100km 2024 (22 hours) |
| 115505 | Azar | Christopher | M | NY | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 121401 | Azcona | Pablo | M | CA | US | 2 | Wasatch Front 100M 2025 (36 hours) † |
| 121019 | Azevedo | Brian | M | Ca | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 109220 | AZMI | NAAMAN | M | ISRAEL | IL | 16 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 114610 | Azriel | Jacob | M | IL | US | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 126751 | Baade | Austin | M | NE | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 117058 | Baars | Anouk | F | Haute Savoie | FR | 2 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 124595 | Baas | Marjolein | F | Florida | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 112790 | Baatar | Zagdaa | F | California | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 107629 | Bååth | Daniel | M | Malmo | SE | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 123914 | BABA | SHIRO | M | Tokyo | JP | 1 | OSJ Ontake 100km 2025 (20 hours) |
| 124827 | Babinec | Ana | F | Colorado | US | 1 | Never Summer 100km 2025 (23 hours) |
| 115575 | Babini | Augusto | M | Mendoza | AR | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 113617 | Babyak | Brian | M | NM | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 109211 | Baca | Allison | F | CO | US | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 124275 | Baccarani | Gabriella | F | Panama | PA | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 117951 | bachelet | martin | M | Neuchatel | CH | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125700 | Bachelet | Matthias | M | Côte d’or | FR | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 106683 | Bachman | Tod | M | 2 | High Lonesome 100M 2025 (37 hours) | ||
| 104242 | Backhausen | Majell | M | VIC | AU | 16 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 123534 | Backholm | Ari | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124711 | Backhurst-Braye | Mike | M | Surrey | GB | 1 | North Downs Way 100M 2025 (30 hours) |
| 126169 | Backstrom | Ian | M | British Columbia | CA | 1 | Cascade Crest 100M 2025 (34 hours) |
| 108535 | Bacon | Jonathan | M | Zurich | CH | 16 | Azores Trail Run (Whalers' Great Route) 118km 2025 (26 hours) |
| 103387 | Bacon | William | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 109084 | Bacwaden | Byrne | M | Mountain Province | PH | 16 | Dinosaur Valley 100M 2024 (35 hours) † |
| 125401 | Baddeley | Mark | M | Lincolnshire | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 102851 | Baer | Katherine | F | NC | US | 64 | Kettle Moraine 100M 2025 (30 hours) † |
| 126249 | Baerg | Kelsey | F | British Columbia | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 115846 | Baertlein | Mitch | M | OR | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 105279 | Baetz | James | M | WI | US | 32 | Dinosaur Valley 100km 2024 (22 hours) |
| 116226 | Baeza | Carlos | M | Chihuahua | MX | 4 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 125269 | Bagdonas | Tomas | M | Vilnius | LT | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 121231 | BAGNOL | JEROME | M | FRANCE | FR | 2 | Trail du Saint-Jacques by UTMB 130km 2025 (28 hours) |
| 108101 | Bagrin | Adrian | M | California | US | 8 | San Diego 100M 2025 (32 hours) † |
| 101514 | Baguenier Desormeaux | Arnaud | M | FRA | FR | 8 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 116780 | Bahrey | Stephanie | F | OH | US | 4 | Canal Corridor 100M 2025 (30 hours) † |
| 102992 | Baikie | Michael | M | CA | US | 8 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 111732 | Bailey | April | F | NC | US | 4 | Yeti Virginia 100M 2025 (30 hours) † |
| 102731 | Bailey | Chad | M | TX | US | 32 | No Business 100M 2025 (34 hours) |
| 112200 | Bailey | Daniel | M | OR | US | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 101083 | Bailey | Jack | M | MA | US | 16 | Wasatch Front 100M 2025 (36 hours) † |
| 127844 | Bailey | Joshua | M | OR | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 100696 | Bain | Andy | M | GBR | GB | 32 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 103311 | Bainbridge | Andrew | M | CO | US | 4 | Hardrock 100M 2025 (48 hours) † |
| 110005 | Baines | Paul | M | California | US | 16 | Grindstone by UTMB 100km 2025 (18 hours) |
| 124914 | Bair | Steven | M | CO | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 123546 | Baird | Andrew | M | NY | US | 1 | Zion 100M 2025 (36 hours) † |
| 127429 | Baird | Jennifer | F | UT | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 120295 | Baird | Katherine | F | WA | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 111718 | Baird | Matthew | M | PA | US | 8 | Canal Corridor 100M 2025 (30 hours) † |
| 127279 | baird | shannon | F | WA | US | 1 | Bigfoot 206M 2025 (100 hours) † |
| 114190 | Baird-Murray | David Justin | M | Powys | GB | 4 | Autumn 100M 2025 (28 hours) |
| 127282 | Baker | Benjamin | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 115299 | Baker | Buck | M | TX | US | 1 | Western States 100M 2025 (30 hours) † |
| 108885 | baker | christy | F | CA | US | 16 | Cuyamaca 100km 2025 (17 hours) † |
| 104086 | Baker | Corey | M | MI | US | 16 | Rim to River 100M 2025 (32 hours) † |
| 111354 | Baker | Derrick | M | MS | US | 2 | Mamba 100M 2024 (34 hours) † |
| 117608 | Baker | Jason | M | MA | US | 4 | San Diego 100M 2025 (32 hours) † |
| 124635 | Baker | Jennifer | F | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 126924 | Baker | Joshua | M | Mississippi | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 102135 | Baker | Loren | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 115070 | Baker | Mark | M | Auckland | NZ | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 110443 | Baker | Michael | M | Western Cape | ZA | 2 | Ultra-Trail Cape Town 100M 2024 (45 hours) |
| 124681 | Baker | Sarah | F | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 117249 | Baker | Skyler | M | TN | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 121830 | Baker | William | M | Massachusetts | US | 2 | Vermont 100M 2025 (30 hours) |
| 104191 | Bakker | Laura | F | GBR | GB | 16 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 124097 | Bakker | Rob | M | South Holland | NL | 1 | SwissPeaks 100km 2025 (28 hours) |
| 115686 | Bako | Barnabas | M | Pest | HU | 4 | South Downs Way 100M 2025 (30 hours) |
| 117520 | Bakouline | Boris | M | VIC | AU | 2 | Surf Coast Century 100km 2025 (17 hours) |
| 126603 | Bala | Muru | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 126998 | Balao | François | M | France | FR | 1 | Grand Raid des Pyrénées - Ultra 160km 2025 (48 hours) |
| 124086 | Baldasare | Joseph | M | New Jersey | US | 1 | Vermont 100km 2025 (17 hours) |
| 116696 | Baldinger | Michael | M | IL | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 123716 | Baldo | Natalie | F | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 106687 | Baldwin | John | M | 1 | Western States 100M 2025 (30 hours) † | ||
| 125491 | Baldwin | Sara | F | Minnesota | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 101451 | Baldwin | Scott | M | PA | US | 64 | Vermont 100km 2025 (17 hours) |
| 113303 | Balester | Ben | M | California | US | 8 | Waldo 100km 2025 (18 hours) † |
| 108823 | Balestrieri | Daniel | M | MA | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 115593 | Balkanski | Eric | M | New York | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 107160 | Ball | Alex | M | SC | US | 8 | Kettle Moraine 100M 2025 (30 hours) |
| 115120 | Ball | Dane | M | TX | US | 1 | Western States 100M 2025 (30 hours) † |
| 119113 | Ball | Joshua | M | MI | US | 4 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 112554 | Ball | Justin | M | Oregon | US | 8 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 126282 | Ball | Stephen | M | GA | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 106689 | Ball | Wayne | M | MA | US | 128 | Vermont 100M 2025 (30 hours) |
| 118655 | Ballard | Lee | M | Lincoln | GB | 2 | Azores Trail Run (Whalers' Great Route) 118km 2025 (26 hours) |
| 126674 | BALLET-BAZ | JEREMIE | M | Réunion | FR | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 109686 | Balogh | Laszlo | M | CO | US | 8 | Run Rabbit Run 100M 2025 (36 hours) |
| 105611 | Baltieri | Fabio | M | ITA | IT | 8 | Lake Biwa 100M 2025 (52 hours) |
| 111875 | Bambrick | Rachel | F | PA | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 102027 | Banaszak | Nicholas | M | CA | US | 128 | Pine to Palm 100M 2025 (34 hours) † |
| 122153 | BANASZYNSKI | DAMIAN | M | BERKSHIRE | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 106369 | Bancroft | Brett | M | AUS | AU | 32 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 123185 | Bandiera | David | M | British Columbia | CA | 2 | Cascade Crest 100M 2025 (34 hours) |
| 103219 | Banel | Paul | M | CO | US | 32 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 108746 | Banerjee | Arnab | M | WA | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 127227 | Bangs | Tyler | M | Idaho | US | 1 | Bighorn 100M 2025 (35 hours) |
| 102846 | Banh | Hoa | F | AUS | AU | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 127115 | Bankieris | Brandon | M | Georgia | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 126199 | Banks | Joe | M | PA | US | 1 | Worlds End 100km 2025 (19 hours) |
| 104107 | Banks | Kevin | M | GBR | GB | 32 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 107181 | Banks | Trevor | M | CO | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 125621 | Banks | Tyler | M | AR | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 127161 | Banning | Shauna | F | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 125239 | Bannister | Shane | M | SA | AU | 1 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 127883 | Banno | Kohei | M | Saitama-prefecture | JP | 1 | FunTrails Chichibu & Okumusashi 105km 2024 (30 hours) |
| 101195 | Banta | Jacob | M | CO | US | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 120240 | Bao | Jay | M | IL | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 127138 | Bara | Charles | M | Marne | FR | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 120645 | Baracco | Alberto | M | Italy | IT | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 118191 | Barajas | Daniela | F | California | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 123882 | Barbat | Sebastien | M | QC | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 125634 | Barbato | Marco | M | Milano | IT | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 122292 | Barbeau | Steeve | M | CA | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 100216 | Barbely | Erin | F | GA | US | 4 | Pinhoti 100M 2025 (32 hours) |
| 116280 | Barber | Aaron | M | Arizona | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 126137 | Barber | Austin | M | British Columbia | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 120489 | Barber | Caleb | M | WA | US | 2 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 106133 | Barber | Kelly | M | CA | US | 16 | Bear, The 100M 2025 (36 hours) † |
| 127328 | Barbier | Marc | M | Rhône | FR | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 127208 | Barbieri | Ranieri Brook | M | Firenze | IT | 1 | SwissPeaks 360km 2025 (156 hours) |
| 122943 | BARBINI | RAFFAELE | M | Livorno | IT | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 114300 | Barden | Craig | M | ENG | GB | 4 | North Downs Way 100M 2025 (30 hours) |
| 118296 | Bare | Cody | M | CO | US | 4 | Never Summer 100km 2025 (23 hours) |
| 104642 | Baret | Sylvain | M | FRA | FR | 32 | Gran Trail Peñalara 110km 2025 (25 hours) |
| 119332 | Bareth | Jerome | M | FL | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 127902 | Barfe | Joseph | M | South carolina | US | 1 | Black Canyon 100km 2025 (17 hours) |
| 122595 | Barfield | Samuel | M | ID | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 119141 | Barg | Michelle | F | MO | US | 2 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 121399 | Bargen | Cory | M | British Columbia | CA | 2 | Cascade Crest 100M 2025 (34 hours) |
| 115706 | Bargo | Greg | M | FL | US | 2 | HOKA Bandera 100km 2025 (17 hours) |
| 127257 | Bargy | Javzandulam | F | Ca | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 118347 | Bärhausen | Jendrik | M | Nord-Rhein-Westfalen | DE | 4 | Zugspitz 100M 2025 (48 hours) |
| 103932 | Barichievich | Alan | M | CA | US | 128 | IMTUF 100M 2025 (36 hours) † |
| 103549 | Barichievich | Caroline | F | CA | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 100764 | Baris | Laney | F | NJ | US | 1 | Hellbender 100M 2025 (40 hours) † |
| 101411 | Barkan | William | M | CA | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 101480 | Barkdull | David | M | CA | US | 32 | IMTUF 100M 2025 (36 hours) † |
| 102017 | Barker | Mae | F | FL | US | 2 | Burning River 100M 2025 (30 hours) |
| 112918 | Barker | Matthew | N | SC | US | 4 | Umstead 100M 2025 (30 hours) |
| 125680 | Barker-Smith | Dean | M | Greater Manchester | GB | 1 | Autumn 100M 2025 (28 hours) |
| 115117 | Barkero | Jake | M | CA | US | 4 | Cuyamaca 100km 2025 (17 hours) † |
| 125737 | Barlow | Raiel | F | VT | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 117458 | BARNES | Chris | M | TX | US | 4 | Sedona Canyons 125M 2025 (52 hours) |
| 124585 | Barnes | Sean | M | ID | US | 1 | Moab 238M 2025 (108 hours) † |
| 125299 | Barnett | Kenny | M | Western Australia | AU | 1 | Blackall 100km 2025 (18 hours) |
| 121754 | Barnett | Walt | M | Virginia | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 109734 | Barney | Andrew | M | UT | US | 4 | Bear, The 100M 2025 (36 hours) † |
| 125093 | Barnhart | Evan | M | CA | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 121702 | Barnickel | Harald | M | Bavaria | DE | 2 | Mozart by UTMB 119km 2025 (23 hours) |
| 120904 | Barnickle | Roger | M | CA | US | 2 | Angeles Crest 100M 2025 (36 hours) † |
| 113142 | Barr | Shawn | M | CA | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 101884 | Barr | Tim | M | CO | US | 4 | West Highland Way 95M 2025 (30 hours) |
| 121221 | Barra | Andrea | M | CN | IT | 2 | Tuscany Crossing 103km 2025 (21 hours) |
| 117773 | Barrera | Jhon | M | Meta | CO | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 106026 | Barreto | Elijah | M | CA | US | 16 | Cuyamaca 100km 2025 (17 hours) † |
| 119297 | Barrett | Allisan | F | MI | US | 2 | Kettle Moraine 100M 2025 (30 hours) |
| 104282 | Barrett | Andrew | M | FL | US | 2 | Javelina Jundred 100M 2025 (30 hours) |
| 125683 | Barrett | Ben | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127546 | Barrett | Casey | M | London | GB | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 109551 | Barrett | Damian | M | Essex | GB | 4 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 127250 | Barrett | Daniel | M | NV | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 108504 | Barrett | Michael | M | VT | US | 1 | Vermont 100km 2025 (17 hours) |
| 112104 | Barrett | Tyler | M | Idaho | US | 4 | Cocodona 250M 2025 (125 hours) |
| 100424 | Barrett | Wade | M | TX | US | 32 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 125577 | Barrett | Wyatt | M | CA | US | 1 | Cocodona 250M 2025 (125 hours) |
| 111341 | Barrington | Jeffrey | M | Washington | US | 8 | Tahoe 202M 2025 (100 hours) † |
| 115269 | Barrington | Nicholas | M | London | GB | 4 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 126567 | Barrington | Rachel | F | California | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 116595 | Barrio | Santiago Cornelio | M | Zagreb | HR | 4 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 127459 | Barron | Eric | M | AL | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 126321 | Barros | Alicia | F | Montevideo | UY | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124166 | Barros | Erick | M | Georgia | US | 1 | No Business 100M 2025 (34 hours) |
| 122969 | Barry | Matthew | M | TN | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 113460 | Barsch | Matthias | M | Bavaria | DE | 8 | Zugspitz 100M 2025 (48 hours) |
| 100428 | Bartelsmeyer | Andrew | M | MO | US | 16 | Mohican 100M 2025 (32 hours) |
| 116739 | Barter | Nicholas | M | West Sussex | GB | 4 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 117613 | Bartholomew | Christopher | M | California | US | 1 | Western States 100M 2025 (30 hours) † |
| 121487 | Bartholomew | Joseph | M | Utah | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 117714 | Bartholomew | Joshua | M | Victoria | AU | 4 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 100311 | Bartholomew | Lucy | F | AUS | AU | 8 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 124613 | Bartomeli | Alicia | F | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 120955 | Barton | Shawn | M | California | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 123956 | Bartos | Virág | F | Pest | HU | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 113913 | Bartosik | Magdalena | F | Idaho | US | 8 | Zion 100M 2025 (36 hours) † |
| 115596 | Bartosik | Wojciech | M | ID | US | 2 | Zion 100M 2025 (36 hours) † |
| 116941 | Baruch | Andre | M | NJ | US | 2 | Waldo 100km 2025 (18 hours) † |
| 114721 | Barushev | Denis | M | CA | US | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 105415 | Basacoma | Francesc | M | ESP | ES | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 122510 | Basak | David | M | Colorado | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 114495 | Basham | Amanda | F | Colorado | US | 4 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 107613 | Bass | Ilya | M | MA | US | 16 | Bighorn 100M 2025 (35 hours) |
| 101680 | Bassa | Tommaso | M | ITA | IT | 128 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 100928 | Bassett | Alison | F | CA | US | 2 | HURT 100M 2025 (36 hours) † |
| 113497 | Bassett | Chris | M | California | US | 4 | Pine to Palm 100M 2025 (34 hours) † |
| 101010 | Bassili | Tara | F | ON | CA | 16 | Bigfoot 206M 2025 (100 hours) † |
| 104804 | Bastiaens | Wim | M | BEL | BE | 1 | Western States 100M 2025 (30 hours) † |
| 110010 | Basu | Ekta | F | CA | US | 4 | Javelina Jundred 100M 2025 (30 hours) |
| 123040 | Basuini | Michael | M | TN | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 101385 | Batchelor | Eric | M | CA | US | 8 | HURT 100M 2025 (36 hours) † |
| 116826 | Batdorf | Gabriel | M | PA | US | 2 | Eastern States 100M 2025 (36 hours) |
| 107630 | Bateman | Luke | M | Texas | US | 4 | IMTUF 100M 2025 (36 hours) † |
| 125682 | Bateman | Thom | M | IL | US | 1 | Tunnel Hill 100M 2024 (30 hours) |
| 119009 | Bates | Angela | F | AB | CA | 2 | Lost Soul Ultra 100km 2025 (21 hours) |
| 109327 | Bates | Becky | F | B.C. | CA | 16 | Hardrock 100M 2025 (48 hours) † |
| 112662 | Bates | Brad | M | AR | US | 2 | Mamba 100M 2024 (34 hours) † |
| 126664 | Bates | Brooke | F | New Mexico | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 125408 | Bates | James | M | London | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 113239 | Bates | Matthew | M | California | US | 8 | Brazos Bend 100M 2024 (32 hours) |
| 111567 | Bathe | Colin | M | Cornwall | GB | 4 | South Downs Way 100M 2025 (30 hours) |
| 119623 | Batres | Guillermo | M | California | US | 2 | Leona Divide 100km 2025 (17 hours) |
| 127710 | Batty | Chase | M | TN | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 119855 | Batz | Christian | M | Bavaria | DE | 2 | Swiss Alps 100M 2025 (50 hours) |
| 109510 | Baud-Lavigne | Bertrand | M | QC | CA | 16 | Quebec Mega Trail 135km 2025 (32 hours) |
| 127248 | Baude | Ryan | M | Seine Saint Denis | FR | 1 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 115577 | Bauer | Anthony | M | MA | US | 4 | Twisted Branch 100km 2025 (20 hours) † |
| 102657 | Bauer | Becki Lynn | F | CO | US | 4 | Wasatch Front 100M 2025 (36 hours) † |
| 102680 | Bauer | Beth | F | OH | US | 64 | Vermont 100M 2025 (30 hours) |
| 116825 | Bauer | Bob | M | Pa | US | 1 | Eastern States 100M 2025 (36 hours) |
| 102867 | Baughman | John | M | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 102376 | Baum | Andrew | M | UT | US | 16 | Quicksilver 100km 2025 (17 hours) † |
| 127046 | Bauman | Val | F | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 104079 | Baumann | Jonathon | M | IN | US | 128 | Hellbender 100M 2025 (40 hours) |
| 124264 | Baumer | Grace | F | Colorado | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 117770 | Baumhover | James | M | CO | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 124490 | Bawden | John | M | AZ | US | 1 | Crazy Mountain 100M 2025 (36 hours) † |
| 116632 | Baxley | Paul | M | Idaho | US | 4 | IMTUF 100M 2025 (36 hours) † |
| 101367 | Baxley | Tyler | M | CA | US | 64 | Javelina Jundred 100M 2025 (30 hours) |
| 118289 | Baxter | Dean | M | NSW | AU | 4 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 112373 | Bay | Andy | M | OH | US | 8 | Canal Corridor 100M 2025 (30 hours) † |
| 122109 | Baylis | Patrick | M | BC | CA | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 125843 | Baylor | Ricky | M | New Jersey | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 125945 | Bayne | Alasdair | M | Scotland | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 123570 | Bazhutkin | Andrey | M | Victoria | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 103811 | Bazire | Matthew | M | GBR | GB | 4 | Mallorca by UTMB: Serra de Tramuntana (SDT) 135km 2025 (30 hours) |
| 124800 | Beach | Adam | M | Greater London | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 122774 | Beach | Daniel | M | ON | CA | 2 | Quebec Mega Trail 135km 2025 (32 hours) |
| 118676 | Beachy | Kyle | M | Ohio | US | 4 | Tarawera by UTMB 102km 2025 (17 hours) |
| 118131 | Beal | Brian | M | Nc | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 119877 | Beale | Ryan | M | On | CA | 2 | Quebec Mega Trail 135km 2025 (32 hours) |
| 123161 | Bean | Albert | M | GA | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 113502 | Bear | Samantha | F | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 123508 | Beard | David | M | South Glos | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 125714 | Beard | Jenny | F | AR | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 125563 | Bearden | Dan | M | MN | US | 1 | Superior 100M 2025 (38 hours) |
| 104524 | Bearss | Joseph | M | CO | US | 16 | Indiana 100M 2025 (30 hours) |
| 125422 | Beasley | Joshua | M | MA | US | 1 | Sean O'Brien 100km 2025 (17 hours) † |
| 104598 | Beatty | Croom | M | CA | US | 64 | Javelina Jundred 100M 2025 (30 hours) † |
| 113880 | Beatty | Todd | M | SC | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 121104 | Beaty | Ronnie | M | Texas | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 114564 | Beauchamp | Heidi | F | CO | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 124659 | Beaudoin | Stephane | M | BC | CA | 1 | IMTUF 100M 2025 (36 hours) † |
| 115735 | Beaudway | David | M | Colorado | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 116001 | Beaulieu | Jordan | M | Alberta | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 123614 | Beaulieu | Nathanaël | M | Québec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 120333 | Beaver | Dan | M | Arizona | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 125179 | Beavon | Christopher | M | Queensland | AU | 1 | Blackall 100km 2025 (18 hours) |
| 115189 | Beazley | Chris | M | Queensland | AU | 2 | Blackall 100km 2025 (18 hours) |
| 123764 | BECERRA ZUÑIGA | MIGUEL ANGEL | M | Gto. | MX | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 127588 | Bech Dopping | Patrick | M | Sermersoq | GL | 1 | SwissPeaks 170km 2025 (58 hours) |
| 110632 | BECK | Arnaud | M | Réunion | RE | 2 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 124411 | Beck | Daniel Kim | M | - | DK | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126361 | Beck | James | M | Victoria | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 122494 | Becker | Bryan | M | AL | US | 2 | Pinhoti 100M 2025 (32 hours) † |
| 102662 | Becker | David | M | PA | US | 128 | Canal Corridor 100M 2025 (30 hours) † |
| 102583 | Becker | Lea | F | PA | US | 128 | Canal Corridor 100M 2025 (30 hours) † |
| 124698 | Becker | Saskia | F | NM | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 112367 | Bednar | Lyndsey | F | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 112343 | bedsun | michael | M | MI | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124612 | Beemanapalli | Krishna | M | OR | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 107437 | Beeninga | Matt | M | WA | US | 16 | Cascade Crest 100M 2025 (34 hours) |
| 100486 | Begic | Kristijan | M | CT | US | 1 | Western States 100M 2025 (30 hours) † |
| 107129 | Behrend | Annie | F | OR | US | 32 | Pine to Palm 100M 2025 (34 hours) † |
| 118292 | Behrendt | Adam | M | Montana | US | 4 | Hardrock 100M 2025 (48 hours) † |
| 115042 | Behrens | Bjoern | M | Bavaria | DE | 2 | Zugspitz 100M 2025 (48 hours) |
| 114915 | Behrens | Malachi | M | NE | US | 2 | Crazy Mountain 100M 2025 (36 hours) † |
| 114316 | Behunin | John | M | UT | US | 4 | Wasatch Front 100M 2025 (36 hours) |
| 126704 | BEJAOUI | Syriac | M | 83170 | FR | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 127789 | Belanger | Nate | M | WI | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 118625 | Belforti | Gabriel | M | Texas | US | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 124167 | Belisle | Scott | M | CT | US | 1 | Vermont 100M 2025 (30 hours) |
| 126533 | Belk | Molly | F | VA | US | 1 | Hellgate 100km 2024 (17 hours) |
| 127863 | Bell | Donald | M | Scotland | GB | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 127906 | bell | Hilary | F | Queensland | AU | 1 | Surf Coast Century 100km 2025 (17 hours) |
| 124685 | Bell | Ian | M | CA | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 106700 | Bell | Ian | M | 8 | North Downs Way 100M 2025 (30 hours) | ||
| 125593 | Bell | Matt | M | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 125465 | Bellè | Severin | M | Zurich | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 125456 | Bellevie | Chris | M | WA | US | 1 | Cascade Crest 100M 2025 (34 hours) |
| 126008 | Belllingham | Daniel | M | Florida | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 119920 | Bellows | Chris | M | Maine | US | 2 | C & O Canal 100M 2025 (30 hours) † |
| 126825 | Belton | Robin | F | NY | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 124241 | Beltramo | Ethan | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 125550 | Beltran | Cooper | M | TX | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 105154 | Beltz | Matthew | M | CA | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 101683 | Belzberg | Jade | F | BC | CA | 16 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 127956 | Bemmerl | Dieter | M | Lower Austria | AT | 1 | Grossglockner UltraTrail 110km 2025 (28 hours) |
| 114862 | Benard | Valentin | M | Ariege | FR | 2 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 124852 | Benavent | Erwan | M | Paris | FR | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 123239 | Bender | Blake | M | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 105619 | Bender | Chris | M | CA | US | 64 | Quicksilver 100km 2025 (17 hours) † |
| 127617 | Bender | Eythor | M | Ordino | AD | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 126738 | Bendik | Jonathan | M | ON | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 108238 | Bendt | Mike | M | SD | US | 8 | Wasatch Front 100M 2025 (36 hours) † |
| 106591 | Benefield | Brandon | M | WA | US | 8 | Crazy Mountain 100M 2025 (36 hours) † |
| 116995 | Benjamin | Michael | M | CA | US | 4 | Bigfoot 206M 2025 (100 hours) |
| 126761 | Bennally | Harold | M | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 107303 | Bennett | Evan | M | Pennsylvania | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 101088 | Bennett | Heidi | F | UT | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 124770 | Bennett | Jackson | M | Illinois | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 102271 | Bennett | James | M | GBR | GB | 1 | Western States 100M 2025 (30 hours) † |
| 125435 | Bennett | Jerome | M | Texas | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 102553 | Bennett | Simon | M | GBR | GB | 8 | Hardwolds 80M 2024 (24 hours) |
| 122275 | Bennett | Stephen | M | MA | US | 2 | HOKA Bandera 100km 2025 (17 hours) |
| 112807 | bennie | david | M | NSW | AU | 8 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 123721 | Benoit | Austin | M | Michigan | US | 1 | Superior 100M 2025 (38 hours) † |
| 125148 | Benoit | Morgan | F | MI | US | 1 | Superior 100M 2025 (38 hours) |
| 104290 | Benoit | Richard | M | WA | US | 2 | Waldo 100km 2025 (18 hours) † |
| 122871 | Benoit | Simon | M | ON | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 116631 | Bensko | Jenna | F | CO | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 121836 | Benson | Adam | M | WY | US | 2 | Crazy Mountain 100M 2025 (36 hours) † |
| 119253 | Benson | Naomi | F | R.C.T | GB | 2 | Lakeland 100M 2025 (40 hours) |
| 120299 | Benson | Rhiannon | F | New Jersey | US | 2 | Umstead 100M 2025 (30 hours) |
| 120400 | Benson | Tara | F | NC | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 120045 | Bentley | Joseph | M | Michigan | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 109867 | Benvie | Ben | M | Ontario | CA | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 104230 | Benway | Karen | F | VT | US | 16 | Twisted Branch 100km 2025 (20 hours) † |
| 121921 | Beratlis | Cody | M | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 118643 | BERENGUER | Pascal | M | Normandie | FR | 2 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 127699 | Beres | Dylan | M | North Carolina | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 126392 | Beresnev | Aleksei | M | Sverdlovsk region | RU | 1 | Golden Ring 100km 2025 (18 hours) |
| 113955 | Berg | Brad | M | GA | US | 8 | Georgia Death Race 74M 2025 (24 hours) † |
| 126146 | Berg | Chris | M | Colorado | US | 1 | Never Summer 100km 2025 (23 hours) |
| 100009 | Berger | Aaron | M | AZ | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 101790 | Berger | Dan | M | CA | US | 32 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 126355 | Berger | Robert | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 104217 | Bergeron | Greg | M | CA | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 111545 | Bergeron | Philippe | M | Québec | CA | 2 | Grindstone by UTMB 100M 2025 (36 hours) |
| 115674 | Berghout | Hanna | F | North Carolina | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 111775 | Bergman | Joshua | M | Alberta | CA | 8 | Fat Dog 120M 2025 (48 hours) † |
| 118566 | Bergquist | Michael | M | UT | US | 4 | Wasatch Front 100M 2025 (36 hours) † |
| 124632 | bergstrom | nicole | F | wa | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 115975 | Berkey | Andrew | M | IN | US | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 125123 | Berkley | Nick | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 122575 | Berman | David | M | NY | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 123778 | Bermingham | Matthew | M | PA | US | 1 | Worlds End 100km 2025 (19 hours) |
| 127384 | BERNAGOU | Thibaut | M | Meurthe et Moselle | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 123934 | Bernal | Paul | M | Pichincha | EC | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 109778 | Bernard | Nicolas | M | isère | FR | 16 | Swiss Alps 100M 2025 (50 hours) |
| 108758 | Bernard | Yannick | M | QC | CA | 16 | Grindstone by UTMB 100M 2025 (36 hours) |
| 127303 | Bernhard | Deik-Marten | M | Lower Saxony | DE | 1 | Krakonosova Stovka 100km 2025 (22 hours) |
| 104577 | Bernhisel | Drew | M | TX | US | 8 | Brazos Bend 100M 2024 (32 hours) |
| 124452 | Bernhisel | Samuel | M | Oregon | US | 1 | Waldo 100km 2025 (18 hours) † |
| 113265 | Berry | Colin | M | TAS | AU | 8 | Buffalo Stampede 100km 2025 (23 hours) |
| 124574 | Berry | Kimberly | F | MD | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 115420 | Berry | Robert | M | Tennessee | US | 4 | Mamba 100M 2024 (34 hours) † |
| 117410 | Berry | Stan | M | OK | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 119919 | Berryman | Claire | F | Louisiana | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 122845 | BERTHION | Matthieu | M | Zealand | DK | 2 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 100692 | Berti | Evan | M | NJ | US | 32 | Javelina Jundred 100M 2025 (30 hours) |
| 127730 | Berto | Julien | M | Vaucluse | FR | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 123693 | Bertolet | Adam | M | CA | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 127341 | Bertolutti | Jeremy | M | Nouvelle Aquitaine | FR | 1 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 127670 | Bertram | Logan | M | OR | US | 1 | Mountain Lakes 100M 2025 (30 hours) † |
| 104721 | Bertram | Travis | M | VA | US | 2 | C & O Canal 100M 2025 (30 hours) † |
| 123608 | Bertschinger | Tobias | M | Zurich | CH | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 118794 | Beskar | Joel | M | Wisconsin | US | 4 | Bighorn 100M 2025 (35 hours) |
| 116147 | Besson | Nicholas | M | OR | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 126069 | Best | Simon | M | Surrey | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 111123 | Betancourt | Nicolas | M | Florida | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 124966 | bethencourt jorge | guillermo | M | Cabarias | ES | 1 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 109463 | Betouret | Sebastien | M | Greater London | GB | 16 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 117483 | Betten | Matt | M | NH | US | 4 | HURT 100M 2025 (36 hours) † |
| 108343 | Betten | Sebastian | M | QLD | AU | 16 | Guzzler Ultra 100km 2025 (24 hours) |
| 112431 | Bettridge | Alan | M | East Sussex | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 117881 | Betts | Kellen | M | WA | US | 4 | Moab 238M 2025 (108 hours) † |
| 111939 | Betz | Craig | M | FL | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 127283 | Beukman | Zack | M | Western cape | ZA | 1 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 127370 | Beuth | Jodie | F | QLD | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 127201 | Bever | Lewis | N | Utah | US | 1 | Saddles 100M 2025 (34 hours) † |
| 126985 | Beveridge-Smith | Kodi | M | West Midlands | GB | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 114746 | Beverly | Robert | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125764 | Bevilacqua | Kurt | M | PA | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 125306 | Beyaert | Leonard | M | Zurich | CH | 1 | Swiss Alps 100km 2025 (22 hours) |
| 123983 | Bezant | Amy | F | Haute Savoie | FR | 1 | Swiss Alps 100M 2025 (50 hours) |
| 109365 | Bezza | Hakime | M | Quebec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 106706 | Bhasin | Saurabh | M | 128 | Wasatch Front 100M 2025 (36 hours) † | ||
| 125331 | Bhaskar | Harsha | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 110130 | Bhosle | Amit | M | WA | US | 8 | IMTUF 100M 2025 (36 hours) † |
| 113555 | Biagio | Dale | M | Gauteng | ZA | 4 | Georgia Death Race 74M 2025 (24 hours) † |
| 124029 | Bianchetti | Ruben Enrico | M | Italy | IT | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 122327 | Bianchini | Nick | M | TN | US | 2 | Tahoe 202M 2025 (100 hours) |
| 123034 | Biase | Isabelle | F | CA | US | 2 | Javelina Jundred 100M 2025 (30 hours) |
| 125315 | Biasetti | Gabriele | M | Italy | IT | 1 | Tuscany Crossing 103km 2025 (21 hours) |
| 121112 | bibeau | maxime | M | quebec | CA | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 102439 | Biber-Brewer | Rachel | F | CO | US | 32 | Leadville Trail 100M 2025 (30 hours) |
| 103729 | Bickers | Natalie | F | AK | US | 8 | Long Haul 100M 2025 (30 hours) † |
| 101708 | Bickerstaff | Henry | M | OK | US | 32 | C & O Canal 100M 2025 (30 hours) † |
| 117872 | Bicknell | Kayla | F | NV | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 126397 | Bié | Nicolas | M | FRANCE | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 107428 | Biedenbender | Gerald | M | KY | US | 4 | Mohican 100M 2025 (32 hours) |
| 111696 | Bielby | William | M | Greater London | GB | 4 | Tarawera by UTMB 102km 2025 (17 hours) |
| 126768 | Bieler | Jan | M | Hesse | DE | 1 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 127534 | Bielik | Michael | M | NY | US | 1 | Cascade Crest 100M 2025 (34 hours) |
| 118150 | Bierema | Jordan | M | Ontario | CA | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 124757 | Bieser | Oliver | M | OH | US | 1 | Rabid Raccoon 100M 2025 (36 hours) |
| 127948 | Bigelow | Michael | M | CA | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 102883 | Biggers | Lance | M | WA | US | 8 | Fat Dog 120M 2025 (48 hours) † |
| 124322 | Biggin | Matt | M | Essex | GB | 1 | Javelina Jundred 100M 2025 (30 hours) |
| 119323 | Biggs | Cameron | M | Arizona | US | 2 | Saddles 100M 2025 (34 hours) † |
| 119408 | Bigio | Sophia | F | Virginia | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 115145 | Bigman | Matthew | M | OR | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 114573 | Bilegan | Cristian | M | BistritaNasaud | RO | 2 | Swiss Alps 100km 2025 (22 hours) |
| 127319 | Bilgili | Ahmet | M | FL | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 120944 | Billings | Marc | M | NC | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 126869 | Billups | Lea | F | AL | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 121696 | Binhammer | Mead | M | Vermont | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 125773 | Binkley | Jude | M | Georgia | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 114206 | Binlich | Jean-Manuel | M | France | FR | 2 | Gran Trail Courmayeur 100km 2025 (28 hours) |
| 127156 | Birault | Ludovic | M | FRANCE | FR | 1 | Grand Raid des Pyrénées - Ultra 160km 2025 (48 hours) |
| 125029 | Birch | Dominic | M | England | GB | 1 | Swiss Alps 100km 2025 (22 hours) |
| 122690 | Bircham | Pete | M | Bay of Plenty | NZ | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 125088 | Bird | Andrew | M | UT | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 100806 | Bird | Nora | F | Minnesota | US | 256 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 113866 | Biren | Robyn | F | North Carolina | US | 4 | No Business 100M 2025 (34 hours) |
| 112084 | Birkel | Brad | M | WI | US | 8 | Sulphur Springs 100km 2025 (18 hours) |
| 119655 | Birkl | Nina | F | Tasmania | AU | 2 | Surf Coast Century 100km 2025 (17 hours) |
| 122028 | Birkmire | John | M | MD | US | 2 | Vermont 100M 2025 (30 hours) |
| 126075 | Birrrer | Simon | M | Solothurn | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 118530 | Bisineer | Maya | N | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 122658 | Bitard | Franck | M | New York | US | 2 | Grindstone by UTMB 100M 2025 (36 hours) |
| 113479 | Bittick | Benjamin | M | California | US | 8 | Tahoe 202M 2025 (100 hours) † |
| 117803 | Bizub | Stanley | M | North Carolina | US | 4 | Burning River 100M 2025 (30 hours) |
| 127172 | Bjornsson | Thorleifur Stefan | M | N/A | IS | 1 | Istria by UTMB 110km 2025 (24 hours) |
| 120113 | Black | Anna | F | TX | US | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 125258 | Black | Riley | M | CA | US | 1 | Waldo 100km 2025 (18 hours) † |
| 104554 | Blackard | Michelle | F | AZ | US | 8 | Wasatch Front 100M 2025 (36 hours) † |
| 125003 | Blacklow | Serena | F | MA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 126775 | Blackmore | Kody | M | English | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 116210 | Blackwell | Adam | M | Virginia | US | 2 | Grindstone by UTMB 100M 2025 (36 hours) |
| 106104 | Blackwell | James | M | WY | US | 64 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 116839 | Blackwell | Mark | M | CA | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 126978 | BLades | Farrah | F | QLD | AU | 1 | Guzzler Ultra 100km 2025 (24 hours) |
| 100591 | Blaha | Martin | M | CZE | CZ | 32 | Transgrancanaria 125km 2025 (28 hours) |
| 127494 | Blain | Emily | F | Kentucky | US | 1 | Pinhoti 100M 2025 (32 hours) |
| 119542 | Blair | Brian | M | Ca | US | 2 | IMTUF 100M 2025 (36 hours) |
| 107651 | Blake | Chandler | M | Utah | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 114142 | Blakeley | Mark | M | Massachusetts | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 103230 | Blakemore | Ashley | F | CO | US | 1 | Western States 100M 2025 (30 hours) † |
| 105777 | Blakeney | Charles | M | CA | US | 16 | Quicksilver 100km 2025 (17 hours) † |
| 109612 | Blanchard | Felix-Antoine | M | Québec | CA | 16 | Vermont 100km 2025 (17 hours) |
| 107707 | Blanchard | Justin | M | WA | US | 8 | Mountain Lakes 100M 2025 (30 hours) † |
| 125394 | Blanco | Carlos | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 125398 | Blanco | Catherine | F | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 108309 | Bland | James | M | Manawatu | NZ | 8 | Tarawera by UTMB 100M 2025 (36 hours) |
| 100420 | Blankenship | Buck | M | AZ | US | 64 | Javelina Jundred 100M 2025 (30 hours) † |
| 123800 | Blaschak | Tyanna | F | California | US | 1 | Waldo 100km 2025 (18 hours) † |
| 127761 | Blasingame | John | M | TX | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 127405 | Blasius | Serena | F | Washington | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 103982 | Blatecky | Andy | M | CO | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 113163 | Blatt | Saskia | F | NRW | DE | 8 | Mozart by UTMB 119km 2025 (23 hours) |
| 122278 | Blawat | Patrick | M | WI | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 100001 | Blea | Stephen | M | CA | US | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 126897 | Bleksley | Arwen | F | TX | US | 1 | San Diego 100M 2025 (32 hours) † |
| 126274 | blennerhassett | alex | F | CO | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 109231 | Blessing | Ben | M | ID | US | 4 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 113542 | Bleuer | Brian | M | Iowa | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 100012 | Bligan | Carl | M | PA | US | 32 | Hellgate 100km 2024 (17 hours) |
| 112631 | Blinn | Rachel | F | NC | US | 8 | Tahoe 202M 2025 (100 hours) |
| 110883 | Bliss | Joe | M | Michigan | US | 8 | Hellbender 100M 2025 (40 hours) |
| 102757 | Bliss | Nathan | M | MN | US | 32 | Superior 100M 2025 (38 hours) † |
| 124602 | Blivas | Ryan | M | CA | US | 1 | Zion 100km 2025 (19 hours) |
| 119640 | Blobaum | Kent | M | Nebraska | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 103929 | Block | Travis | M | MN | US | 64 | Hennepin 100M 2025 (30 hours) † |
| 120909 | Blomberg | Victor | M | Oregon | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 119661 | Blomqvist | Michaela | F | Idaho | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 127880 | BLONDIN | Lionel | M | France | FR | 1 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 106240 | Blonski | Daniel | M | SVK | SK | 32 | Letecka Stovka 104km 2025 (21 hours) |
| 110818 | Bloom | Aaron | M | GA | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 107795 | Bloom | Ilene | F | CO | US | 8 | Tunnel Hill 100M 2024 (30 hours) |
| 124450 | Bloomquist | Eric | M | Il | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 118194 | Blosser | Nathan | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 115658 | Blossom | Jarrod | N | MI | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 113362 | Bloudek | Ondřej | M | Prague | CZ | 8 | Krakonosova Stovka 100km 2025 (22 hours) |
| 126037 | Blue | Brennan | M | MN | US | 1 | Superior 100M 2025 (38 hours) † |
| 127251 | Blukis | Gordon | M | AZ | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 118496 | Blum | Markus | M | Thuringia | DE | 4 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 125192 | Blumberg | Kellen | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126164 | Boals | Ian | M | WA | US | 1 | Bigfoot 206M 2025 (100 hours) † |
| 126373 | boardman | Will | M | VT | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 125826 | Bobadilla | Lupe | M | MD | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 127608 | Boddenberg | Bastian | M | NRW | DE | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 109609 | Bodle | Bradley | M | WA | US | 16 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 107519 | Bodle | Kevin | M | WA | US | 16 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 117100 | Bodolec | Antoine | M | Bretagne | FR | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 127502 | Bodznick | Christina | F | MT | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 111924 | Boelk | Michael | M | Minnesota | US | 4 | Indiana 100M 2025 (30 hours) |
| 116320 | Boese | Benjamin | N | CO | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 114413 | Boesen | Shani | F | AZ | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 115146 | Boeyer | Jim | M | GA | US | 4 | Cruel Jewel 106M 2025 (48 hours) † |
| 117029 | Bogus | Andrew | M | Ca | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 117631 | Bohannon | Adam | M | CA | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124431 | Böhm | Willi | M | Berlin | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 118124 | Bohnett | Jeremy | M | TX | US | 4 | Run Rabbit Run 100M 2025 (36 hours) † |
| 118852 | Bohrer | Sabrina | F | NH | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 100981 | Boic | Dennis | M | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 106307 | Boifava | Alessandra | F | ITA | IT | 16 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 118402 | Boisaubin | Jesse | M | OR | US | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 110324 | Boisnard | Maxime | M | Vaud | CH | 2 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 121327 | Boisvenue | Trina | F | Ontario | CA | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 102660 | Bökman | Jakob | M | SWE | SE | 2 | Täby Extreme Challenge 100M 2025 (30 hours) |
| 127233 | Boldt | Caitlin | F | California | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 117345 | Boler | Eric | M | Minnesota | US | 4 | Hennepin 100M 2025 (30 hours) † |
| 109949 | Boley | Brianna | F | WA | US | 8 | Pine to Palm 100M 2025 (34 hours) † |
| 124582 | Bolos | Kaydi | F | UT | US | 1 | Zion 100km 2025 (19 hours) |
| 125063 | Bolton | Michael | M | Utah | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 107659 | Bolton | Ryan | M | QLD | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 123649 | Bolton | Tanis | F | Ontario | CA | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 111622 | Bolyard | Chris | M | MO | US | 8 | Canal Corridor 100M 2025 (30 hours) † |
| 127468 | Bolze | Alexandre | M | California | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 121929 | Bon | Eleanor | F | CA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 121717 | Bon | Peter | M | Groningen | NL | 2 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 126813 | Boncewicz da Fonseca | Rodrigo | M | Paraná | BR | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 109159 | Bond | Jonathan | M | Quebec | CA | 1 | Vermont 100km 2025 (17 hours) |
| 112017 | Bond | Natalie | F | Montana | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 106558 | Bondarev | Andrew | M | PA | US | 8 | Worlds End 100km 2025 (19 hours) |
| 126208 | Bondeson | Sofie | F | Skåne | SE | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 115202 | Bondue | Maxime | M | Bouches du Rhone | FR | 4 | Trail du Saint-Jacques by UTMB 130km 2025 (28 hours) |
| 101137 | Bondy | Brian | M | ON | CA | 4 | Tahoe 202M 2025 (100 hours) † |
| 125933 | Bonhoure | Florian | M | Île de France | FR | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 123575 | Bonkoski | Sheila | F | ME | US | 1 | Waldo 100km 2025 (18 hours) † |
| 100823 | Bonkowsky | Josh | M | UT | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 124448 | Bonnet | Geoffroy | M | Haute-Savoie | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 102908 | Bonnett-Natraj | Karen | F | CA | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 127560 | Bontemps | Damien | M | FL | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126393 | Bonzi | Laurence | F | France | FR | 1 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 111440 | Booher | David | M | TX | US | 8 | Leadville Trail 100M 2025 (30 hours) |
| 100657 | Booher | Lisa | F | AL | US | 4 | No Business 100M 2025 (34 hours) |
| 112420 | Boone | Melanie | F | CA | US | 8 | Sean O'Brien 100km 2025 (17 hours) |
| 126319 | Borad | Jorge | M | Montevideo | UY | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 122480 | Borceux | Pauline | F | N/A | BE | 2 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 126059 | Bordellès-Viala | Emmanuel | M | France | FR | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 112605 | Borden | Kortnee | M | Ontario | CA | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 117272 | BORDIN | WILLIAN | M | Rio Grande do Sul | BR | 4 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 111281 | Borga | Steve | M | OH | US | 8 | Burning River 100M 2025 (30 hours) |
| 126736 | Borger | Jacob | M | Pennsylvania | US | 1 | Vermont 100km 2025 (17 hours) |
| 118137 | Borges | Paige | F | California | US | 1 | Western States 100M 2025 (30 hours) |
| 115938 | Borgmeier | Emilee | F | UT | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 123784 | Borland | Karla | F | Hampshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 112932 | Borland | Matt | M | NC | US | 8 | Long Haul 100M 2025 (30 hours) † |
| 127353 | Born | Andrew | M | West Sussex | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 117720 | Borne | Aurélien | M | Alpes Maritimes | FR | 4 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 126449 | BORNEMANN | DEAN | M | WI | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 125551 | Borodin | Vyacheslav | M | Moscow | RU | 1 | Golden Ring 100km 2025 (18 hours) |
| 124304 | Borowski | Michael | M | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 121167 | Borreggine | Dominick | M | Alabama | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 112153 | Borrevik | Kiley | M | OR | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 102933 | Borst | Michael | M | WI | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 122479 | Borsuk | Mike | M | California | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 112629 | Bortels | Renee | F | FL | US | 2 | Burning River 100M 2025 (30 hours) |
| 122103 | Boruk | Slava | M | Ontario | CA | 2 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 124943 | Borynik | Agnieszka | F | IL | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 116894 | Bosredon | Anthony | M | Quebec | CA | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123840 | Boss | Angela | F | British Columbia | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 126832 | Bosshart | Gena | F | ME | US | 1 | Vermont 100M 2025 (30 hours) |
| 126125 | Bossou | Joan | M | Alsace | FR | 1 | Mt Fuji 100M 2025 (46 hours) |
| 108576 | Bost | Bryan | M | FL | US | 4 | Yeti Virginia 100M 2025 (30 hours) † |
| 124593 | Bost | Ian | M | TX | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 117287 | Boston | Andrew | M | NJ | US | 4 | San Diego 100M 2025 (32 hours) † |
| 126587 | Bostwick | Doran | F | New Mexico | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 121065 | Bott | Andrew | M | Florida | US | 2 | Black Canyon 100km 2025 (17 hours) |
| 120508 | Bott | Kevin | M | AZ | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 123982 | Botta | Jochen | M | Nordrhein-Westfalen | DE | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 125075 | Botti | Juan Manuel | M | Buenos airea | AR | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 127157 | Bottiau | Jean-François | M | Ile-de-France | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125640 | BOUBY | Simon | M | Aveyron | FR | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 125115 | Bouchard | Amy | F | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 126631 | Bouchard | Courtney | F | Texas | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 108053 | Boucheix | Alexandre | M | Val de Marne | FR | 16 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 107779 | Bouchey | Joseph | M | NV | US | 4 | San Diego 100M 2025 (32 hours) † |
| 118922 | Bouck | Ken | M | BC | CA | 4 | Canadian Death Race 118km 2025 (24 hours) |
| 124620 | BOUGOUIN | Xavier | M | Vienne | FR | 1 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 114950 | Boulet | Vincent | M | Quebec | CA | 4 | Grindstone by UTMB 100M 2025 (36 hours) |
| 112387 | Bouliere | Fabien | M | France | FR | 8 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 122344 | Bounemoura | Abed | M | Paris | FR | 2 | Grand Raid des Pyrénées - Tour de Cirques 123km 2025 (40 hours) |
| 103690 | Bourassa | Denise | F | CO | US | 128 | Hennepin 100M 2025 (30 hours) † |
| 115375 | Bourges | Gwendal | M | Bretagne | FR | 4 | SwissPeaks 360km 2025 (156 hours) |
| 127532 | Bourne | Karl | M | Wicklow | IE | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 117919 | Bousleiman | Salim | M | NY | US | 4 | Vermont 100M 2025 (30 hours) |
| 116294 | Bousquet | Michele | F | California | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127950 | Boutin | Dominic | M | Québec | CA | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 111872 | Boutros | Philippe | M | Idaho | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 101905 | Boutte | Jeff | M | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 116324 | Bowden | Sierra | F | CA | US | 4 | Fat Dog 100km 2025 (24 hours) |
| 105011 | Bowden | Upton | M | MI | US | 64 | Fat Dog 100km 2025 (24 hours) |
| 109990 | Bowen | Caleb | M | WV | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 124816 | Bowen | Fatima | F | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 122639 | Bowen | Gary | M | CO | US | 2 | Never Summer 100km 2025 (23 hours) |
| 117025 | Bowen | Kristin | F | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 123678 | Bowen | Lori | F | MO | US | 1 | Mamba 100M 2024 (34 hours) † |
| 119764 | BOWER | NATHAN | M | Flintshire | GB | 2 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 119588 | Bowers | Donny | M | PA | US | 2 | C & O Canal 100M 2025 (30 hours) † |
| 115354 | Bowers | Jeffrey | M | Ohio | US | 4 | Burning River 100M 2025 (30 hours) |
| 121923 | Bowers | Matthew Cody | M | Tennessee | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 127463 | Bowersmith | Skyler | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 124646 | Bowie | Brandan | M | NM | US | 1 | Bigfoot 206M 2025 (100 hours) † |
| 123940 | Bowles | Joshua | M | AZ | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 123943 | Bowling | Christopher | M | OH | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 122864 | Bowling | Mark | M | UT | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 121944 | Bowman | colleenannsaylor@yahoo.com | F | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 111386 | Bowman | Jacob | M | Kentucky | US | 8 | Hennepin 100M 2025 (30 hours) † |
| 108593 | Bowman | Sean | M | Indiana | US | 16 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 123709 | Boyce | Calum | M | Kent | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 126833 | Boychuk | Derek | M | QC | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 115433 | Boyd | Andrew | M | Pennsylvania | US | 4 | Laurel Highlands 70.5M 2025 (20 hours) |
| 125375 | Boyd | George | N | TX | US | 1 | Mallorca by UTMB: Serra de Tramuntana (SDT) 135km 2025 (30 hours) |
| 125355 | Boyd | Patrick | M | Manchester | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 119208 | Boyd | Tyler | M | WA | US | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 127071 | Boyer | Brian | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 123564 | Boyer | Maxime | M | Saint Pierre et Miquelon | FR | 1 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 115804 | Boyle | Brian | M | MD | US | 4 | Grindstone by UTMB 100km 2025 (18 hours) |
| 126262 | Boyle | Jason | M | NM | US | 1 | Pinhoti 100M 2025 (32 hours) |
| 108201 | Boyle | John | M | Dublin | IE | 8 | Kerry Way Ultra 193km 2025 (40 hours) |
| 126919 | Boyle | Zachary | M | MO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) † |
| 110553 | Boynton | Naomi | F | New Zealand | NZ | 8 | Tarawera by UTMB 100M 2025 (36 hours) |
| 109370 | Bozzoli | Jacopo | M | Bo | IT | 16 | South Downs Way 100M 2025 (30 hours) |
| 123473 | Braa | Mats | M | Trondelag | NO | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 117877 | Bracht | Garrett | M | GA | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 107535 | Brackett | Jennifer | F | CA | US | 8 | Javelina Jundred 100M 2025 (30 hours) |
| 111271 | Bradea | Benjamin | M | OR | US | 8 | Cuyamaca 100km 2025 (17 hours) |
| 125198 | Bradley | Matt | M | Hong Kong | HK | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127410 | Bradley | Sean | M | Utah | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 114854 | Bradley | Tim | M | Lincolnshire | GB | 4 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 101146 | Bradley-Jones | David | M | GBR | GB | 16 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125497 | Bradlynn | Toban | M | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 100771 | Bradner | Aaron | M | VA | US | 32 | No Business 100M 2025 (34 hours) |
| 127439 | Bradshaw | Jackson | M | UT | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 127601 | Bradshaw | William | M | DC | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 108844 | Brady | Casey | F | Utah | US | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 111907 | Brady | Colin | M | Colorado | US | 8 | Zion 100km 2025 (19 hours) |
| 108764 | Brady | John | M | UT | US | 16 | Mallorca by UTMB: Serra de Tramuntana (SDT) 135km 2025 (30 hours) |
| 112378 | Brady | Ryan | M | CA | US | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 127135 | Brady | Yvette (Yve) | F | VIC | AU | 1 | Surf Coast Century 100km 2025 (17 hours) |
| 125116 | Bragante | Daniel | M | Western Australia | AU | 1 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 117188 | Bragg | James | M | North Carolina | US | 4 | No Business 100M 2025 (34 hours) |
| 120919 | Bragg | Jez | M | Dorset | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 125579 | Brahen | Joshua | M | Nevada | US | 1 | Never Summer 100km 2025 (23 hours) |
| 111970 | Braine | Gildas | M | England | GB | 8 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 125966 | Bramall | Justin | M | England | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 117596 | branchesi | alberto | M | CR | IT | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 107572 | Brand | Christopher | M | NC | US | 16 | Hellbender 100M 2025 (40 hours) † |
| 104674 | Brand | Naomi | F | ZAF | ZA | 32 | Ultra-Trail Cape Town 100M 2024 (45 hours) |
| 127318 | Brand | Tessa | F | Noord Holland | NL | 1 | Nuts Ylläs Pallas 160km 2025 (35 hours) |
| 127395 | Brandenburg | Evan | M | Ohio | US | 1 | Leona Divide 100M 2025 (33 hours) † |
| 112108 | Brandes | Peter | M | CO | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 124442 | Brandhorst-Satzkorn | Johan | M | BC | CA | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 121109 | Brandi | Chris | M | MA | US | 2 | Vermont 100M 2025 (30 hours) |
| 110771 | Brandner | Erik | M | Minnesota | US | 16 | Leadville Trail 100M 2025 (30 hours) |
| 126966 | Brandt | Ellis | M | CA | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 109056 | Brandt | Eric | M | MN | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 117855 | Brandt | Tyler | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 108744 | Branham | Jason | M | Pennsylvania | US | 16 | Hellgate 100km 2024 (17 hours) |
| 112094 | Branham | Josh | M | CO | US | 4 | Run Rabbit Run 100M 2025 (36 hours) † |
| 117416 | Brant | B | M | IL | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 100353 | Brashear | Bob | M | KY | US | 64 | Tunnel Hill 100M 2024 (30 hours) † |
| 125618 | Brasil | Dina | F | California | US | 1 | Waldo 100km 2025 (18 hours) † |
| 125789 | Braun | Derek | M | MO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 122157 | Braun | Joscha | M | BAYERN | DE | 2 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 120774 | Braun | Mark | M | Oregon | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 100313 | Braun | Rhonda | F | NY | US | 4 | Bear, The 100M 2025 (36 hours) † |
| 104556 | Braunlich | David | M | CO | US | 64 | Never Summer 100km 2025 (23 hours) |
| 119380 | Bray | Oliver | M | Maidenhead | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 107618 | Brazil | Miles | M | NV | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 119327 | Breakwell | Rich | M | Shropshire | GB | 2 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 124947 | Brecht | Teresa | F | CA | US | 1 | Leona Divide 100km 2025 (17 hours) |
| 108420 | Breen | Verity | F | CA | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 124651 | BREGEON | Matthieu | M | Basel Stadt | CH | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 121982 | Breitenbach | Sarah | F | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 111134 | Breitenstine | Derek | M | CT | US | 8 | C & O Canal 100M 2025 (30 hours) † |
| 104075 | Brenac | Nicolas | M | FRA | FR | 4 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 126386 | Brenes | Enrique | M | CA | US | 1 | Zion 100km 2025 (19 hours) |
| 122606 | Brenna | Stephen | M | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 117449 | Brennan | James | M | VA | US | 4 | Grindstone by UTMB 100km 2025 (18 hours) |
| 106550 | Brennan | James | M | AUS | AU | 16 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 121964 | Brennan | Kaysen | F | Oregon | US | 2 | Cascade Crest 100M 2025 (34 hours) |
| 126337 | Brennan | Liam | M | Leicestershire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 115463 | Brennan | Paul | M | Northern Ireland | GB | 4 | Mozart by UTMB 119km 2025 (23 hours) |
| 105136 | Brennwald | Alex | M | CHE | CH | 64 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 125062 | Brenton | Chuck | M | CO | US | 1 | Never Summer 100km 2025 (23 hours) |
| 120447 | Breon | Lauren | F | Pennsylvania | US | 2 | Eastern States 100M 2025 (36 hours) |
| 118234 | Brester | Sonja | F | MT | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 103536 | Bretan | Jonathan | M | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 118864 | Bretelle | Manu | M | CA | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 126428 | Breton | Alexandre | M | Québec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 124663 | Brett | Aaron | N | New York | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 116386 | Brett | Jordan | M | British Columbia | CA | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 105347 | Bretz | Virgil | M | WA | US | 64 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 118531 | Bretz | Willem | M | Washington | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 110594 | Breuer | Reed | M | CA | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 116316 | Brewer | Jessie | F | CA | US | 4 | Zion 100km 2025 (19 hours) |
| 117018 | Brewer | Joanna | F | BC | CA | 4 | Mountain Lakes 100M 2025 (30 hours) † |
| 124515 | Brewer | Kathleen | F | New Brunswick | CA | 1 | Istria by UTMB 110km 2025 (24 hours) |
| 102474 | Brewster | James | M | GBR | GB | 16 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 101144 | Breyfogle | James | M | AZ | US | 32 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 123824 | Briand | Aurelien | M | Asturias | ES | 1 | Gran Trail Peñalara 110km 2025 (25 hours) |
| 102649 | Briant | Yoann | M | QC | CA | 4 | Quebec Mega Trail 135km 2025 (32 hours) |
| 123852 | Brichard | Marine | F | Colorado | US | 1 | Never Summer 100km 2025 (23 hours) |
| 125218 | Brickett | Nichole | F | Colorado | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 116778 | Briet | Numa | M | New York | US | 4 | Twisted Branch 100km 2025 (20 hours) † |
| 114160 | Briggs | Andon | M | Alabama | US | 2 | Pinhoti 100M 2025 (32 hours) † |
| 124084 | Briggs | Bobby | M | UT | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 116380 | Briggs | Greg | M | Ca | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126057 | Briggs | Sebastian | M | England | GB | 1 | Kerry Way Ultra 193km 2025 (40 hours) |
| 108147 | Briggs | Spencer | M | NM | US | 2 | Bighorn 100M 2025 (35 hours) |
| 116160 | Bright | Kathrine | F | PA | US | 4 | Yeti Virginia 100M 2025 (30 hours) † |
| 117440 | Bright | Randall | M | Arkansas | US | 4 | Mamba 100M 2024 (34 hours) † |
| 116987 | Brightbill | Kevin | M | OR | US | 4 | Sean O'Brien 100km 2025 (17 hours) † |
| 124145 | Briguglio | Kerrie-Ann | F | MA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 120336 | Briguglio | Peter | M | New York | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 121318 | Brihaye | Gil | M | Brussels | BE | 2 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 107365 | Briley | Phil | M | Kent | GB | 4 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 120494 | Brimmer | Jonathan | M | TX | US | 2 | Never Summer 100km 2025 (23 hours) |
| 116086 | Brin | Lisa | F | CO | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 121272 | Briner | Martin | M | BL | CH | 2 | SwissPeaks 100km 2025 (28 hours) |
| 127523 | Bring | Jason | M | GA | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 124654 | Brinker | Christie | F | IL | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 117053 | Briones | Jonardine | M | Benguet | PH | 2 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 118950 | briot | anthony | M | bourgogne | FR | 4 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 122834 | Brisebois | Luke | M | Saskatchewan | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 120914 | Brits | De Villiers | M | Western Cape | ZA | 2 | Ultra Trail Drakensberg 163km 2025 (48 hours) |
| 118426 | Britt | Jonathan | M | Georgia | US | 4 | Georgia Death Race 74M 2025 (24 hours) † |
| 126685 | Britton | Matt | M | Bedfordshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 124666 | Britton | Scott | M | NJ | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 102699 | Broadhurst | Chris | M | Victoria | AU | 4 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 118126 | Broadmoore | Amy | F | MN | US | 2 | Superior 100M 2025 (38 hours) † |
| 105209 | Broadmoore | Andrew | M | MN | US | 2 | Superior 100M 2025 (38 hours) † |
| 109024 | Brochu | Felix-Olivier | M | Quebec | CA | 8 | Quebec Mega Trail 135km 2025 (32 hours) |
| 103852 | Brock | Jason | M | UT | US | 8 | Cocodona 250M 2025 (125 hours) |
| 103460 | Brock | Kenna | F | CO | US | 1 | Western States 100M 2025 (30 hours) † |
| 104768 | Brockdorf | Carmen | F | FL | US | 32 | Crazy Mountain 100M 2025 (36 hours) † |
| 118275 | Brockman | Kevin | M | CA | US | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 110801 | Broderick | Stacia | F | MA | US | 8 | Vermont 100km 2025 (17 hours) |
| 116896 | Broecker | Eric | M | Colorado | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 126580 | Bromwell | Tom | M | Zürich | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 120405 | brondeau | laurent | M | aude | FR | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 115988 | brones | benjamin | M | WA | US | 2 | Bighorn 100M 2025 (35 hours) |
| 124354 | Brook | Amara | N | NV | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 115324 | Brook | Kate | F | Oxfordshire | GB | 2 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 115322 | Brooks | Jakob | M | Ontario | CA | 4 | West Highland Way 95M 2025 (30 hours) |
| 107874 | Brooks | Jonathon | M | IL | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 101931 | Brooks | Kevin | M | WA | US | 64 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 116404 | Brooks | Nicholas | M | Cheshire | GB | 4 | Lakeland 100M 2025 (40 hours) |
| 105901 | Brooks | Robert | M | NC | US | 64 | Umstead 100M 2025 (30 hours) |
| 126779 | Brooks | Susie | F | VT | US | 1 | Vermont 100M 2025 (30 hours) |
| 102082 | Brooks | William | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 123101 | Brookshire | Rae | F | California | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 126617 | Brophy | Keith | M | Michigan | US | 1 | Tunnel Hill 100M 2024 (30 hours) |
| 103178 | Bross | Ted | M | CO | US | 32 | Run Rabbit Run 100M 2025 (36 hours) † |
| 107154 | Brosseau | Philippe | M | Québec | CA | 16 | Swiss Alps 100M 2025 (50 hours) |
| 109905 | Brosseau | Sebastien | U | Vendee | FR | 4 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 110139 | Brossellier | Sebastien | M | Pays de la Loire | FR | 16 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 106718 | Brostella | Daniel | M | Panama | PA | 64 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 125524 | Brouard | Brice | M | Sarthe | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 125005 | Brouillette | Robert | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 103205 | Brounstein | Dan | M | CA | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 108098 | Brower | Deryk | M | BC | CA | 8 | Fat Dog 100km 2025 (24 hours) |
| 126159 | Brown | Aaron | M | BC | CA | 1 | Hood Hundred 100M 2025 (34 hours) |
| 108724 | Brown | Alaina | F | VA | US | 16 | Twisted Branch 100km 2025 (20 hours) † |
| 125997 | Brown | Andrew | M | England | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 123951 | Brown | Andrew | M | New South Wales | AU | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 113161 | Brown | Anna | F | London | GB | 4 | South Downs Way 100M 2025 (30 hours) |
| 102194 | Brown | Brian | M | MN | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 123116 | Brown | Chris | M | Ontario | CA | 2 | Black Canyon 100km 2025 (17 hours) † |
| 127583 | Brown | Conrad | M | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 126364 | Brown | Dakota | M | ID | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 106288 | Brown | David | M | AL | US | 512 | Pinhoti 100M 2025 (32 hours) † |
| 109927 | Brown | Derek | M | MO | US | 4 | Hellgate 100km 2024 (17 hours) |
| 114312 | Brown | Edwin | M | MN | US | 8 | Georgia Death Race 74M 2025 (24 hours) † |
| 124434 | Brown | Garrett | M | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 109639 | brown | kellie | U | NM | US | 4 | Dinosaur Valley 100M 2024 (35 hours) † |
| 127866 | Brown | Kevin | M | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 100132 | Brown | Kris | M | CA | US | 32 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 102802 | Brown | Leah | F | OR | US | 32 | IMTUF 100M 2025 (36 hours) † |
| 117852 | Brown | Lee | M | MN | US | 4 | Superior 100M 2025 (38 hours) |
| 108700 | Brown | Mike | M | Arkansas | US | 4 | Beaverhead 100km 2025 (20 hours) |
| 124501 | Brown | Mike | M | Colorado | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 109624 | Brown | Peter | M | CA | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 124680 | Brown | Randall | M | WA | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 124838 | Brown | Raymond | M | VA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 113548 | Brown | Rick | M | Yukon | CA | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125383 | Brown | Robert | M | Nsw | AU | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 117642 | Brown | Robin | M | London | GB | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 104902 | Brown | Ryan | M | TX | US | 8 | Rocky Raccoon 100M 2025 (30 hours) |
| 125876 | Brown | Ryder | M | WI | US | 1 | Zion 100M 2025 (36 hours) † |
| 120879 | Brown | Shannon | M | WI | US | 2 | HOKA Bandera 100km 2025 (17 hours) |
| 104024 | Brown | Simon | M | GBR | GB | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 101038 | Brown | Susan | F | AB | CA | 1 | Western States 100M 2025 (30 hours) † |
| 127969 | Brown | Thomas | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 103202 | Brown | Todd | M | IL | US | 1 | North Downs Way 100M 2025 (30 hours) |
| 113112 | Brown | Tom | M | West Sussex | GB | 8 | South Downs Way 100M 2025 (30 hours) |
| 124356 | Brown | Viktoria | F | ON | CA | 1 | Fat Dog 120M 2025 (48 hours) † |
| 112845 | Browne | Colleen | F | Western Cape | ZA | 8 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 103519 | Browne | Glen | M | SGP | SG | 128 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 115727 | Browne | Melissa | F | WA | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 113233 | Browning | Jeff | M | AZ | US | 1 | Western States 100M 2025 (30 hours) † |
| 118399 | Browning | Jim | M | Minnesota | US | 4 | Bighorn 100M 2025 (35 hours) |
| 110026 | Browning | Kristina | F | VA | US | 8 | Umstead 100M 2025 (30 hours) |
| 115144 | Brownlee | Holly | F | North Yorkshire | GB | 4 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 117444 | Brownrigg | David | M | MI | US | 4 | Bigfoot 206M 2025 (100 hours) † |
| 103028 | Broyer | Paul | M | CA | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 103131 | Bruce | Chad | M | CA | US | 8 | Angeles Crest 100M 2025 (36 hours) † |
| 122615 | Bruel | julien | M | 73700 | FR | 2 | Grand Raid des Pyrénées - Ultra 160km 2025 (48 hours) |
| 124460 | Bruins | Dylan | M | Alberta | CA | 1 | Lost Soul Ultra 100km 2025 (21 hours) |
| 107139 | Bruins | Robyn | F | 4 | Blackall 100km 2025 (18 hours) | ||
| 117353 | Bruness | Christian | M | Bayern | DE | 4 | Zugspitz 100M 2025 (48 hours) |
| 127984 | Brunet | Alexandre | M | QC | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 127213 | Brunet | Baptiste | M | Nouvelle-Aquitaine | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 120284 | Bruni | Giuseppe | M | Lincolnshire | GB | 2 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 117886 | Brunner | Erin | F | WA | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 124899 | Brunner | Fabian | M | Colorado | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 109952 | Brunner | Juergen | M | Austria | AT | 8 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 104654 | Brunner | Radek | M | CZE | CZ | 16 | Letecka Stovka 104km 2025 (21 hours) |
| 101630 | Bruno | Benjamin | M | ID | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 105296 | Bruno | Christopher | M | MD | US | 64 | Arkansas Traveler 100M 2025 (30 hours) |
| 125021 | Brunson | Neil | M | Nc | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 120613 | Brunson | Zachary | M | SOUTH CAROLINA | US | 2 | Umstead 100M 2025 (30 hours) |
| 109651 | Brunton | Danny | M | Driffield | GB | 8 | Lakeland 100M 2025 (40 hours) |
| 109352 | Brunton | David | M | Lancs | GB | 1 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 125565 | Brunyer | Marco | M | California | US | 1 | Never Summer 100km 2025 (23 hours) |
| 123988 | Brunzell | Lukas | M | Värmland | SE | 1 | Zugspitz 106km 2025 (25 hours) |
| 126346 | Brussel | Quinn | M | RI | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 121444 | Brust | Colin | M | Montana | US | 2 | Crazy Mountain 100M 2025 (36 hours) † |
| 106485 | Bruzek | Jeffrey | M | MN | US | 8 | Superior 100M 2025 (38 hours) † |
| 119680 | Bruzek | Scott | M | MN | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 112683 | Bryant | Jessica | F | Washington | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 107429 | Bubany | Shawn | M | New York | US | 16 | Twisted Branch 100km 2025 (20 hours) † |
| 102596 | Buccellato | Lee | M | GBR | GB | 8 | Thames Path 100M 2025 (30 hours) |
| 108052 | Bucci | Daniel | M | WA | US | 8 | Crazy Mountain 100M 2025 (36 hours) † |
| 124833 | Bucci | Kim | F | MS | US | 1 | Mamba 100M 2024 (34 hours) † |
| 124841 | Bucci | Rob | M | MS | US | 1 | Mamba 100M 2024 (34 hours) † |
| 110111 | Buchan | Scott | M | Il | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 127795 | Buchanan | Nathan | M | Colorado | US | 1 | Moab 238M 2025 (108 hours) † |
| 125762 | Buchanan | Thomas | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 115747 | Buchholtz | Amanda | F | Colorado | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 120943 | Buchli | Philipp | M | Zurich | CH | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 119762 | Buchli | Stephanie | F | Zurich | CH | 2 | Istria by UTMB 110km 2025 (24 hours) |
| 116027 | Buchman | Elizabeth | F | OH | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 103401 | Buchs | Mario | M | AUS | AU | 64 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 118551 | Buck | Brett | M | Ontario | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 101119 | Buck | Heidi | F | MN | US | 4 | Superior 100M 2025 (38 hours) † |
| 127559 | Buckley | Moriah | F | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 105077 | Bucklin | Benjamin | M | WA | US | 64 | IMTUF 100M 2025 (36 hours) † |
| 122912 | Buckmaster | Matthew | M | California | US | 2 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 122836 | Bucknell | Nikita | F | NSW | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 100889 | Buczek | Kevin | M | NC | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 115597 | Budde | Gary | M | TN | US | 4 | Mamba 100M 2024 (34 hours) † |
| 100713 | Budziak | Nathan | M | CA | US | 32 | Cuyamaca 100km 2025 (17 hours) † |
| 102609 | Budzyn | Nicholas | M | CA | US | 16 | Rio Del Lago 100M 2025 (30 hours) |
| 125742 | Bueno | Walter | M | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 125220 | Buettner | Daniel | M | CA | US | 1 | Black Canyon 100km 2025 (17 hours) |
| 121149 | Buettner | Luke | M | Sk | CA | 2 | Bighorn 100M 2025 (35 hours) |
| 124231 | Buffa | Joe | M | MO | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 126860 | Buffington | Ean | M | CA | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 124689 | Buffington | Jack | M | NH | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 121740 | Bugajska | Agnieszka | F | Greater London | GB | 2 | Thames Path 100M 2025 (30 hours) |
| 123735 | Buglosa | Eduardo Jr | M | Minnesota | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 101797 | Buhler | Kent | M | NC | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 127597 | Bui Manh | Thuong | M | Ninh Binh | VN | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 100932 | Bujer | Ken | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 107832 | Bukszpan | Amy | F | Florida | US | 4 | Tahoe 202M 2025 (100 hours) † |
| 127561 | Bulach | Jim | M | OH | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 127031 | BULETZA | Cathy | F | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 107198 | Buley | Mark | M | Gloucestershire | GB | 8 | Fat Dog 100km 2025 (24 hours) |
| 118128 | Bulger | Jason | M | CO | US | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 112039 | Bull | Jason | M | CO | US | 1 | Western States 100M 2025 (30 hours) † |
| 122747 | Bullard | Justin | M | PA | US | 2 | Worlds End 100km 2025 (19 hours) |
| 121511 | Bullard | Susan | F | Wyoming | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 124014 | Buller | Jared | M | CO | US | 1 | Never Summer 100km 2025 (23 hours) |
| 127622 | Bult | Johnny kay | M | Noord-Holland | NL | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 126699 | Bundick | Garrett | M | CO | US | 1 | Never Summer 100km 2025 (23 hours) |
| 125986 | Bunel | Paul | M | Paris | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 105858 | Burakian | Eli | M | VT | US | 2 | Vermont 100km 2025 (17 hours) |
| 108653 | Burant | Kevin | M | NC | US | 2 | Mamba 100M 2024 (34 hours) † |
| 119509 | Buratto | Roberto | M | Torino | IT | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 107521 | Burch | Greg | M | DE | US | 4 | Umstead 100M 2025 (30 hours) |
| 126899 | Burchard | Joshua | M | AZ | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 126942 | Burd | James | M | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 123743 | Burda | Edward | M | PA | US | 1 | Rabid Raccoon 100km 2025 (22 hours) |
| 114350 | Burdett | Lindsay | F | WA | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 122732 | Burdge | Hayden | M | ID | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 122372 | Burdzy | Marcin | M | NY | US | 2 | Canal Corridor 100M 2025 (30 hours) † |
| 122477 | Bureau-Oxton | Chloe | F | ZH | CH | 2 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 125368 | BURES | Maël | M | AUVERGNE RHONE ALPES | FR | 1 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 127774 | BURG | Bertrand | M | AB | CA | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 125264 | Burgar | Petrea | F | AB | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125863 | Burgess | Al | M | South Australia | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 127568 | Burgess | Bill | M | md | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 104103 | Burgess | Brady | M | CA | US | 64 | Canyons by UTMB 104km 2025 (20 hours) |
| 118040 | Burgess | Porter | F | South Carolina | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 108330 | Burgo | Rebecca | F | NY | US | 16 | Zion 100M 2025 (36 hours) † |
| 118485 | Burgr | Robert | M | North Dakota | US | 2 | Cascade Crest 100M 2025 (34 hours) |
| 122956 | Burgy | Maxime | M | Alsace | FR | 2 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 120630 | Burke | Adam | M | AZ | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 126007 | Burke | Aideen | F | Co. Dublin | IE | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 100568 | Burke | Brian | M | MA | US | 16 | Hellgate 100km 2024 (17 hours) |
| 105463 | Burke | Rory | M | IRL | IE | 2 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 109162 | burke | shaun | M | colorado | US | 16 | Angeles Crest 100M 2025 (36 hours) † |
| 107886 | Burke | Tyler | M | California | US | 4 | Angeles Crest 100M 2025 (36 hours) † |
| 127434 | Burkett | Lowell | M | TX | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 126324 | Burkett | Travis | M | Utah | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 126568 | Burkhart | James | M | TN | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 120530 | Burklow | Brianna | F | Kentucky | US | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 125486 | Burmeister | Jeff | M | maine | US | 1 | Indiana 100M 2025 (30 hours) |
| 110637 | Burnett | Jimmy | M | Arizona | US | 16 | Zion 100km 2025 (19 hours) |
| 122315 | Burney | Emily | F | UT | US | 2 | Javelina Jundred 100M 2025 (30 hours) |
| 123566 | Burns | Eric | M | Wyoming | US | 1 | Bighorn 100M 2025 (35 hours) |
| 117392 | Burns | Geoffrey | M | Colorado | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 121947 | Burns | Kyle | M | MA | US | 2 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 124695 | Burnstein | Michael | M | MA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 110936 | Burpo | Kevin | M | TX | US | 8 | HOKA Bandera 100km 2025 (17 hours) |
| 115343 | Burrer | Lukas | M | GA | US | 4 | Grindstone by UTMB 100M 2025 (36 hours) |
| 126753 | Burrill | Haley | F | Oregon | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 111825 | Burris | Kristin | F | British Columbia | CA | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 112789 | Burroughs | John | M | Alberta | CA | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 113718 | Burrous | Isaac | M | Wa | US | 2 | Dinosaur Valley 100M 2024 (35 hours) † |
| 113467 | Burrow | Trey | M | Texas | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 112992 | Burrowes | Lewis | M | UT | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 127362 | Burrows | Jeremy | M | British Columbia | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 109826 | Burrows | Matt | M | Alberta | CA | 16 | Canadian Death Race 118km 2025 (24 hours) |
| 122424 | Burt | Sam | M | AZ | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 126018 | Burton | Caroline | F | Ca | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 114979 | Burton | John | M | CA | US | 2 | Waldo 100km 2025 (18 hours) † |
| 103607 | Burton | Martin | M | GBR | GB | 2 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 116771 | Busada | Michael | M | PA | US | 2 | Eastern States 100M 2025 (36 hours) |
| 121559 | Busby | Spencer | M | Arizona | US | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 125974 | buscaglia | angelo | M | Italia | IT | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 107140 | Buse | Christie | F | 4 | Desert RATS by UTMB 100km 2025 (20 hours) | ||
| 105735 | Buse | David | M | CA | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 102471 | Buse | Timothy | M | CO | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 124510 | Buser | Richard | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 102942 | Busick | Karen | F | SC | US | 16 | Siskiyou Out Back 100km 2025 (18 hours) |
| 126754 | Busolini | Graham | M | Hertfordshire | GB | 1 | Autumn 100M 2025 (28 hours) |
| 113378 | Buss | Armin | M | Hessen | DE | 4 | Trail du Saint-Jacques by UTMB 130km 2025 (28 hours) |
| 120681 | Bustamante | Carlos | M | TX | US | 2 | Brazos Bend 100M 2024 (32 hours) |
| 117457 | Butcher | Kate | F | British Columbia | CA | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124159 | Butchko | Thomas | M | Ohio | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 118620 | Butkiewicz | Timothy | M | MI | US | 4 | Angeles Crest 100M 2025 (36 hours) |
| 125070 | Butler | Benjamin | M | ACT | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 113090 | Butler | Dakota | M | DC | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 127525 | Butler | Jacob | M | Michigan | US | 1 | Bighorn 100M 2025 (35 hours) |
| 107369 | Butler | James | M | Gloucestershire | GB | 8 | South Downs Way 100M 2025 (30 hours) |
| 115455 | Butler | Mark | M | OH | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) |
| 127521 | Butler | Rebecca | N | LA | US | 1 | Mamba 100M 2024 (34 hours) |
| 120634 | Butler | Shane | M | California | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 116621 | Butt | Helen | F | Ontario | CA | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 123656 | Buttazzoni | Daniele | M | VR | IT | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 126375 | Butte | Shad | M | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) |
| 124882 | Buttner | Greg | M | WI | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 105726 | Buttner | Mark | M | WI | US | 2 | Black Canyon 100km 2025 (17 hours) |
| 123842 | Butts | Adam | M | Colorado | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 124617 | Butts | Dane | M | Washington | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 107928 | Buurma | Nicole | F | WA | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 109315 | Buzko | Yaroslav | M | CA | US | 16 | Cuyamaca 100km 2025 (17 hours) † |
| 117898 | Bygdell | Johanna | F | Västernorrland | SE | 4 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 127332 | Byhre | Steve | M | IL | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 105310 | Byrd | William | M | OR | US | 4 | Beaverhead 100km 2025 (20 hours) |
| 112937 | Byrne | Cillian | M | N/A | IE | 2 | Kerry Way Ultra 193km 2025 (40 hours) |
| 126340 | Byrne | Fergal | M | New York | US | 1 | Eastern States 100M 2025 (36 hours) |
| 104799 | Byrne | Gavin | M | IRL | IE | 16 | South Downs Way 100M 2025 (30 hours) |
| 100170 | Byrne | Tommy | M | WI | US | 1 | Western States 100M 2025 (30 hours) † |
| 115993 | Byrnes | David | M | AZ | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 103489 | Caballero | Rosendo | M | AZ | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 108853 | Cabanillas Carrillo | Rafael | M | Madrid | ES | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 110166 | Cabbage | Matthew | M | TN | US | 16 | Rim to River 100M 2025 (32 hours) † |
| 110115 | Cabo Gil | Juan Antonio | M | Valencia | ES | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 125094 | cabrera | ariel | M | guatemala | GT | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 115152 | Cadart | Dorian | M | Haute Garonne | FR | 2 | Puerto Vallarta by UTMB 147km 2024 (35 hours) |
| 123690 | Cadman | Sean | M | NSW | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 125675 | Caesar-Gordon | Matthew | M | Noord Holland | NL | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 124502 | Caffery | Celia | F | WA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 102577 | Caffrey | Andrew | M | NY | US | 16 | Canal Corridor 100M 2025 (30 hours) † |
| 124944 | Caggiano | Sophia | F | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 115231 | Cahill | Michael | M | Queensland | AU | 4 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 112352 | Cai | Charles | M | CA | US | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123875 | CAI | VIVIAN | F | Kowloon | HK | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 119767 | Cai | Xiaoli | F | WA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 120578 | Cai | Zhiyuan | M | ON | CA | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 123998 | CAILLON | Pascal | M | HERAULT | FR | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 120866 | Caird | Renee | F | CO | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 116934 | Caissie | Josette | F | CA | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 124201 | Cake-Parsons | Barbara | F | Alberta | CA | 1 | Lost Soul Ultra 100km 2025 (21 hours) |
| 125296 | Calabrese | Maurizio | M | CO | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 104773 | Calcagnino | Denise | F | NY | US | 4 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 126170 | Calcote | Bernie | M | TX | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 120628 | Calcutt | Brian | M | California | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 104661 | Calder | Phil | M | NZL | NZ | 32 | Tarawera by UTMB 100M 2025 (36 hours) |
| 125089 | Calero | Diego | M | Pichincha | EC | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 104714 | Calimano | Chris | M | NY | US | 2 | HURT 100M 2025 (36 hours) † |
| 110675 | Calitz | Pieter | M | Western Cape | ZA | 16 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 117690 | Callahan | Aidan | M | California | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 117532 | Callahan | Brandon | M | La | US | 4 | Georgia Death Race 74M 2025 (24 hours) † |
| 121683 | Callahan | Conor | M | Utah | US | 2 | Vermont 100M 2025 (30 hours) |
| 124655 | Callahan | Jonathan | M | CO | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124171 | Callahan | Sherri | F | Ontario | CA | 1 | No Business 100M 2025 (34 hours) |
| 125795 | Callan | Will | M | CA | US | 1 | Black Canyon 100km 2025 (17 hours) |
| 119965 | Calligaris | David | M | MA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123694 | Callsen-Bracker | Mario | M | Niedersachen | DE | 1 | Zion 100km 2025 (19 hours) |
| 112188 | Calvert | Benjamin | M | California | US | 4 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 125957 | Calvert | Dean | M | Tyne & Wear | GB | 1 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 111596 | Calvert | Howard | M | Hampshire | GB | 8 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 104010 | Calzetta | Christopher | M | CA | US | 32 | San Diego 100M 2025 (32 hours) † |
| 127269 | Camarasa | Jonatan | M | Buenos aires | AR | 1 | Patagonia 110km 2025 (27 hours) |
| 102384 | Camenisch | Thomas | M | CHE | CH | 2 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 121209 | Cameron | Anna | F | NSW | AU | 2 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 111598 | Cameron | Ben | M | Wairarapa | NZ | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 103370 | Cameron | Emilia | F | WI | US | 16 | Bigfoot 206M 2025 (100 hours) † |
| 112261 | Cameron | Kyle | M | AZ | US | 8 | HURT 100M 2025 (36 hours) † |
| 123893 | Cameron | Tyler | M | Oregon | US | 1 | Waldo 100km 2025 (18 hours) † |
| 124748 | Camillaci | Lisa | F | NY | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 116861 | Caminiti | Alexandra | F | Georgia | US | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 103631 | Campanella | Cassy | F | GA | US | 8 | Kettle Moraine 100M 2025 (30 hours) † |
| 111612 | Campanella | Jennifer | F | New York | US | 4 | No Business 100M 2025 (34 hours) |
| 122160 | Campbell | Bryan | M | Tn | US | 2 | No Business 100M 2025 (34 hours) |
| 101898 | Campbell | Dan | M | MT | US | 1 | Western States 100M 2025 (30 hours) † |
| 121739 | Campbell | John | M | BC | CA | 2 | Fat Dog 120M 2025 (48 hours) † |
| 127492 | Campbell | Ken | M | Pennsylvania | US | 1 | Eastern States 100M 2025 (36 hours) |
| 102816 | Campbell | Kevin | M | TN | US | 64 | Rim to River 100M 2025 (32 hours) † |
| 126633 | Campbell | Luke | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 104124 | Campbell | Matt | M | WA | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 127228 | Campbell | Rob | M | Jersey | JE | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 111754 | Campbell | Steven | M | VA | US | 8 | Rim to River 100M 2025 (32 hours) † |
| 106568 | Campos | Alberto | M | Michoacan | MX | 1 | Western States 100M 2025 (30 hours) † |
| 115736 | Campos | Roy | M | WI | US | 4 | Kettle Moraine 100M 2025 (30 hours) † |
| 126787 | Canaday | Sage | M | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 115840 | Candelaria | Carlos | M | NC | US | 4 | Umstead 100M 2025 (30 hours) |
| 118751 | Candelaria | Linus | M | Colorado | US | 2 | Tuscany Crossing 160km 2025 (35 hours) |
| 125496 | Candido | Samantha | F | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 125623 | Candler II | Jaroslav | M | Maryland | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 117522 | Candra | Sianti | F | DKI Jakarta | ID | 2 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 110719 | Canessa | Alberto | M | Italia | IT | 16 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 101534 | Canfield | Meghan | F | OR | US | 8 | Pinhoti 100M 2025 (32 hours) |
| 121808 | Canham | Christian | M | WA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 100972 | Cannaday | Kevin | M | CO | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 115510 | Canner | Samuel | M | MD | US | 4 | C & O Canal 100M 2025 (30 hours) † |
| 114256 | Canning | Joshua | M | AZ | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 126004 | Cannon | Ellen | F | CO | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 109337 | Cannon | Jeff | M | CA | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 109646 | Cannon | Keri | F | CA | US | 2 | Wasatch Front 100M 2025 (36 hours) † |
| 124949 | Cano Flores | Ignacio | M | CA | US | 1 | Zion 100M 2025 (36 hours) |
| 121442 | Cantero Cuesta | Javier | M | Madrid | ES | 2 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 104358 | Cantrell | Matt | M | IN | US | 32 | Burning River 100M 2025 (30 hours) |
| 115546 | Cao | Bofei | M | Ontario | CA | 4 | Black Canyon 100km 2025 (17 hours) † |
| 113304 | Caon | Filippo | M | Trento | IT | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 118435 | Capecchi | William | M | WI | US | 4 | Superior 100M 2025 (38 hours) † |
| 105795 | Capili | Aleksis | M | PHL | PH | 4 | Hardcore Ultra Trail (HUT) 100M 2025 (44 hours) |
| 124027 | Capol | Corsin | M | Graubünden | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 124972 | Cappelloni | Corey | M | D.C. | US | 1 | Vermont 100M 2025 (30 hours) |
| 126453 | Cappi | Mike | M | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 121714 | Capron | Bruno | M | Rio de Janeiro | BR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 117692 | Capulong | Bernard | M | MT | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 126046 | Caravello | Christopher | M | Florida | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 108318 | Carayon | Charles | M | Ain | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 114839 | Carberry | John | M | CO | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 118262 | Carboni jr | Sirlesio | M | Rio Grande do Sul | BR | 4 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 126015 | Carbonneau | Pierre | M | Québec | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 118749 | Cardeano | Joao | M | Alberta | CA | 2 | Tahoe 202M 2025 (100 hours) † |
| 112532 | Cardenas | Jose | M | Virginia | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 117641 | Cardenas | Suzanne | F | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 109118 | Cardin | Elliot | M | Quebec | CA | 8 | Black Canyon 100km 2025 (17 hours) † |
| 126928 | Cardin | Félix | M | Québec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 126445 | Cardoso | António | M | Lisboa | PT | 1 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 115955 | Cardoze | Rodrigo | M | Panama | PA | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 105975 | Caren | Neal | M | NC | US | 32 | Hellgate 100km 2024 (17 hours) |
| 114829 | Carey | Mark | M | ON | CA | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 127933 | Carleton | James | M | Hawaii | US | 1 | HURT 100M 2025 (36 hours) † |
| 126925 | Carlier Bouvet | Jeanne | F | Haute-Savoie | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124955 | Carlino | Andy | M | Arizona | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 101348 | Carlson | Alex | M | CO | US | 16 | Never Summer 100km 2025 (23 hours) |
| 127315 | Carlson | Brett | M | Colorado | US | 1 | Bighorn 100M 2025 (35 hours) |
| 125536 | Carlson | Bryce | M | OH | US | 1 | Brazil 150M 2025 (70 hours) |
| 125185 | Carlton | Sophia | F | MD | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 126432 | Carmody | David | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 104557 | Carmon | Amanda | F | LA | US | 4 | Tunnel Hill 100M 2024 (30 hours) † |
| 124129 | Carnett | Cody | M | TX | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 111632 | Carney | Samantha | F | PA | US | 1 | Cruel Jewel 106M 2025 (48 hours) † |
| 121286 | Caron | Joshua | M | MA | US | 2 | No Business 100M 2025 (34 hours) |
| 126406 | Carpenter | Ashleigh | F | Victoria | AU | 1 | Surf Coast Century 100km 2025 (17 hours) |
| 126826 | carr | albert | M | WV | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 103203 | Carr | Bill | M | CA | US | 32 | Canyons by UTMB 104km 2025 (20 hours) |
| 123969 | Carr | Douglas | M | Nevada | US | 1 | Waldo 100km 2025 (18 hours) † |
| 122353 | Carr | Jordan | M | CA | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 113816 | Carr | Taylor | M | OR | US | 8 | Mountain Lakes 100M 2025 (30 hours) † |
| 113412 | Carreon | Miguel | M | NE | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 122000 | Carretero | Abel | M | Lleida | ES | 2 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 120965 | Carrier | Whitney | F | Illinois | US | 2 | Canal Corridor 100M 2025 (30 hours) † |
| 106102 | Carroll | Anne | F | FL | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 126294 | Carroll | Cassidy | F | Connecticut | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 101307 | Carroll | Donal | M | NY | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 112251 | Carroll | Joe | M | OR | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 110667 | Carroll | Joshua | M | Illinois | US | 4 | Hennepin 100M 2025 (30 hours) |
| 121524 | Carroll | Sam | M | Arizona | US | 2 | Moab 238M 2025 (108 hours) † |
| 100805 | Carroll | Tom | M | IL | US | 32 | Hennepin 100M 2025 (30 hours) † |
| 126772 | Carruzzo | Olivier | M | Vaud | CH | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 121118 | Cars | Mikael | M | CA | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 115868 | Carsky | Katie | F | NY | US | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 116993 | Carson | Gregory | M | BC | CA | 4 | Fat Dog 100km 2025 (24 hours) |
| 125076 | Carste | Nicholas | M | WA | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 112001 | Cartaya | Erin | F | CA | US | 4 | Beaverhead 100km 2025 (20 hours) |
| 101213 | Carter | Colton | M | CA | US | 32 | Beaverhead 100km 2025 (20 hours) |
| 102080 | Carter | Deron | M | OR | US | 1 | Western States 100M 2025 (30 hours) † |
| 100617 | Carter | Jonathan | M | CA | US | 32 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 119469 | Carter | Mark | M | VA | US | 2 | Hellgate 100km 2024 (17 hours) |
| 125425 | Carter | Nicolas | M | Nagano | JP | 1 | Mt Fuji 100M 2025 (46 hours) |
| 121384 | Carter | Robin | M | Derbyshire | GB | 2 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 125314 | Carter | Stewart | M | Victoria | AU | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 104195 | Carter (Heuser) | Emily | F | NC | US | 32 | Sulphur Springs 100km 2025 (18 hours) |
| 116112 | Cartwright | Jack | M | Colorado | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 117057 | Carvajal | Enrique Alex | M | Mexico | MX | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 111340 | Carver | David | M | TN | US | 8 | Hellgate 100km 2024 (17 hours) |
| 125969 | Casari | Chiara | F | Italy | US | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 127881 | Casarotto | Riccardo | M | Vicenza | IT | 1 | Gran Trail Courmayeur 100km 2025 (28 hours) |
| 105413 | Casasola | Alessandro | M | ITA | IT | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 126314 | Case | Bren | N | IN | US | 1 | Indiana 100M 2025 (30 hours) |
| 100237 | Case | Stephanie | F | Haute-Savoie | FR | 8 | Hardrock 100M 2025 (48 hours) † |
| 126121 | Case | Tyler | M | Wyoming | US | 1 | Bigfoot 206M 2025 (100 hours) † |
| 126144 | Casey | Sean | M | CA | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 111975 | Cashbaugh | Dylan | M | CA | US | 8 | San Diego 100M 2025 (32 hours) † |
| 126062 | Cass | Ryan | M | SC | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 116453 | Cassaigne | Cyril | M | Paris | FR | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 104664 | Cassan | Stefano | M | ITA | IT | 4 | Javornika 105km 2025 (24 hours) |
| 101882 | Cassano | Andrew | M | NV | US | 32 | HURT 100M 2025 (36 hours) † |
| 125609 | Cassayre | William | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 109203 | Cassel | Joachim | M | London | GB | 16 | Grindstone by UTMB 100km 2025 (18 hours) |
| 120462 | Cassiday | Patrick | M | OR | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 121877 | Cassou | Vincent | M | Bretagne | FR | 2 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 121893 | Castagnini | Francesco | M | Italy | IT | 2 | Abbots Way 100km 2025 (22 hours) |
| 127488 | Castaing | Matthias | M | Auvergne-Rhône-Alpes | FR | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 117469 | Castanelli | Damian | M | Vic | AU | 4 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 113777 | Castanyer | Tofol | M | Illes balears | ES | 4 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 116738 | Castellanos | Jaime | M | California | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 102915 | Castello Branco | Alexandre | M | RJ | BR | 256 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 116788 | Castillo | Nathan | M | Il | US | 2 | Indiana 100M 2025 (30 hours) |
| 127703 | Castillo | Salvador | M | MICH | MX | 1 | Moab 238M 2025 (108 hours) † |
| 127850 | Castillo | Spencer | M | MN | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 116840 | castle | fiona | F | NSW | AU | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 109847 | Casto | Amanda | F | WA | US | 4 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 101219 | Castonguay | David | M | QC | CA | 64 | Twisted Branch 100km 2025 (20 hours) † |
| 113503 | Castres | Deborah | F | NSW | AU | 4 | Leadville Trail 100M 2025 (30 hours) |
| 124543 | Castro | Natasha | F | NC | US | 1 | Hellbender 100M 2025 (40 hours) † |
| 117396 | Castro Valenzuela | Ignacio | M | Baja California | MX | 2 | San Diego 100M 2025 (32 hours) † |
| 121769 | Castro Villicana | Catherine | F | Jalisco | MX | 2 | HOKA Bandera 100km 2025 (17 hours) |
| 119795 | Casty | Marc | M | Graubünden | CH | 2 | Zugspitz 100M 2025 (48 hours) |
| 103461 | Catanglan | Lexie | F | CA | US | 32 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 127281 | Cater | Nathaniel | M | Nevada | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 113858 | Cato | Chad | M | North Carolina | US | 8 | Georgia Death Race 74M 2025 (24 hours) † |
| 117863 | catozi | ADRIANO | M | FR | IT | 4 | South Downs Way 100M 2025 (30 hours) |
| 123712 | Cattina | Nicola | M | BS | IT | 1 | Restonica Trail by UTMB - Ultra-Trail® di Corsica 110km 2025 (36 hours) |
| 121894 | Catzavelos | Nicholas | M | Gauteng | ZA | 2 | Ultra Trail Drakensberg 163km 2025 (48 hours) |
| 122419 | Cauchon | Elisabeth | F | Québec | CA | 2 | Quebec Mega Trail 135km 2025 (32 hours) |
| 105885 | Cauchon | Jean-François | M | QC | CA | 128 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 119721 | Caughran | Jonathan | M | CO | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 124469 | Causey | Nickolas | M | MN | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 117346 | Caussarieu | Valery | M | Yvelines (78) | FR | 4 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 127864 | Cavagnino | Courtney | F | Delaware | US | 1 | Umstead 100M 2025 (30 hours) |
| 101621 | Cavanaugh | Brian | M | MI | US | 4 | Worlds End 100km 2025 (19 hours) |
| 125918 | Cavas cabrera | Daniel | M | Murcia | ES | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 124374 | Cavey | Taylor | N | CO | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 127261 | Caviedes | Racquel | F | AL | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 117597 | Cavill | Kimberley | F | North Yorkshire | GB | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 113153 | Cawthorne | Alex | M | Oxfordshire | GB | 8 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 127992 | Cazier | Garrett | M | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 107413 | Cazorla | Julien | M | London | GB | 16 | Lakeland 100M 2025 (40 hours) |
| 122882 | Cazzolli | Federico | M | Trento | US | 2 | Tuscany Crossing 103km 2025 (21 hours) |
| 115467 | Ceballos | Denisse | F | Sinaloa | MX | 2 | Zion 100km 2025 (19 hours) |
| 112320 | Cebron | Shannon | F | Maryland | US | 4 | Worlds End 100km 2025 (19 hours) |
| 123990 | Cecero | Guglielmo | M | Zurich | CH | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 108312 | Cedano | Sérgio | M | São Paulo | BR | 8 | La Mision 160km 2025 (72 hours) |
| 109496 | Cellier | Sébastien | M | Rhône-Alpes | FR | 2 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 124338 | Cendejas | Carmen | F | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 124728 | Centrone | Alessandro | M | Bavaria | DE | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 126891 | Cerbone | Nicholas | M | Florida | US | 1 | Pinhoti 100M 2025 (32 hours) |
| 126033 | Cermak | Jan | M | Czech Republic | CZ | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 122938 | Cernak | Martin | M | Slovakia | SK | 2 | Ultra Trail Vipava Valley 106km 2025 (25 hours) |
| 122674 | Cernava | John | M | OR | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 116940 | Cerra | Joshua | M | Wisconsin | US | 4 | Indiana 100M 2025 (30 hours) |
| 121481 | Cervantes | Angel | M | Nuevo León | MX | 2 | Puerto Vallarta by UTMB 147km 2024 (35 hours) |
| 126678 | Cervantes | Gustavo | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 103855 | Cervantes | Jose | M | ID | US | 256 | Hardrock 100M 2025 (48 hours) † |
| 122050 | Cesano | Claudio | M | Cuneo | IT | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125448 | cetnar | stephanie | F | MI | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 121046 | Ceus | Emmanuel | M | 49 | FR | 2 | Trail du Saint-Jacques by UTMB 130km 2025 (28 hours) |
| 101878 | Chacon | Lucia | F | CA | US | 64 | Canyons by UTMB 104km 2025 (20 hours) |
| 114776 | Chacon | Robert | M | IL | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 118342 | Chacon Salas | Luis Carlos | M | San Jose | CR | 4 | Zugspitz 106km 2025 (25 hours) |
| 126302 | Chadwick | Christopher | M | NV | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 124165 | Chaffee | Andrew | M | MI | US | 1 | Indiana 100M 2025 (30 hours) |
| 109864 | Chafkin | Max | M | NY | US | 16 | Hellbender 100M 2025 (40 hours) † |
| 102698 | Chahl | Tara | F | AB | CA | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 126681 | Chalifour | Annie | F | BC | CA | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 101803 | Chalk | Darren | M | GBR | GB | 4 | Zion 100km 2025 (19 hours) |
| 127932 | Chamaillard | Mathilde | F | Rhone | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 115376 | chamberland | genevieve | F | Québec | CA | 2 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 127162 | Chambers | Thomas | M | Bayern | DE | 1 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 105532 | Chamoun | Michael | M | CA | US | 16 | IMTUF 100M 2025 (36 hours) † |
| 108548 | Champagne | Anne | F | Quebec | CA | 1 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 122812 | Chan | Ka Lik Gary | M | East Sussex | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 126468 | Chan | Matt | M | MO | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 117892 | Chan | Shermayne | F | NSW | AU | 2 | Buffalo Stampede 100km 2025 (23 hours) |
| 103158 | Chan | Wayne | M | MA | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 108397 | Chaney | Mather | M | AR | US | 16 | Leadville Trail 100M 2025 (30 hours) |
| 120168 | Chaney | Matthew | M | AL | US | 2 | Pinhoti 100M 2025 (32 hours) |
| 126415 | CHANG | CHIH JUNG | M | 竹南鎮 | TW | 1 | Formosa Trail 104km 2024 (28 hours) |
| 122827 | Chang | Daniel | M | California | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 127746 | chang | hongsun | M | Gyunggi-do | KR | 1 | Transjeju by UTMB 150km 2025 (37 hours) |
| 105708 | Chang | Jordan | M | VA | US | 4 | Hellgate 100km 2024 (17 hours) |
| 118028 | Chang | Kristina | F | CO | US | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 114003 | Chankseliani | Larissa | F | ON | CA | 4 | Sulphur Springs 100M 2025 (30 hours) |
| 118919 | Chao | Tzu Hsien | M | Taipei | TW | 4 | Lake Biwa 100M 2025 (52 hours) |
| 123910 | Chapa | Robert | M | TX | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 116470 | Chapdelaine | Connor | M | IL | US | 4 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 107351 | chapman | alan | M | mn | US | 16 | Superior 100M 2025 (38 hours) † |
| 127444 | Chapman | Corey | M | WA | US | 1 | Bigfoot 206M 2025 (100 hours) † |
| 125156 | Chapman | Daniel | M | Wellington | NZ | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 124486 | Chapman | Kolton | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 107503 | Chapman | Peter | M | DC | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 108686 | Chapman | Tyler | M | BC | CA | 8 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 125711 | CHARALAMPIDIS | IOANNIS | M | Greece | GR | 1 | Gran Trail Courmayeur 100km 2025 (28 hours) |
| 127698 | Charette | Samuel | M | QC | CA | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124429 | Charlebois | Amanda | F | Ontario | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 125716 | Charleson | Casey | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 121747 | Charlotte | Viet | F | Haute savoie | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 114374 | Charmoz | Alex | M | CA | US | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 120015 | Charpentier | Jean-Francois | M | Quebec | CA | 2 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 121886 | charpentier | laurent | M | 31270 | FR | 2 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 111751 | Chartier | Chris | M | OH | US | 8 | Mohican 100M 2025 (32 hours) |
| 101360 | Chase | David | M | CA | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 119081 | Chase | Holly | F | DC | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 117046 | Chase | Zander | M | Washington | US | 2 | Zion 100M 2025 (36 hours) |
| 108466 | Chate | Tristan | M | Ticino | CH | 4 | Istria by UTMB 168km 2025 (46 hours) |
| 126785 | Chatel | Denny | M | ga | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 125939 | Chatelot | Richard | M | Auvergne-Rhône-Alpes | FR | 1 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 124610 | Chauveau | Pierre-Yves | M | WA | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 124148 | CHAUVIN | Maxence | M | HAUTS-DE-SEINE | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 102939 | Chavez | Amy | F | CA | US | 32 | Angeles Crest 100M 2025 (36 hours) † |
| 101943 | Chavez | Anthony | M | CA | US | 16 | Waldo 100km 2025 (18 hours) † |
| 126501 | Chavez | Dennis | M | Imbabura | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 107834 | Chavez | Michael | M | Colorado | US | 16 | Run Rabbit Run 100M 2025 (36 hours) |
| 109981 | Cheatham | Scott | M | VA | US | 8 | Yeti Virginia 100M 2025 (30 hours) † |
| 126745 | Chechulin | Simon | M | Georgia | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 104018 | Cheechov | Ron | M | OR | US | 64 | Cascade Crest 100M 2025 (34 hours) |
| 106740 | Cheetham | Gregg | M | Gauteng | ZA | 4 | SkyRun 100km 2024 (28 hours) |
| 125065 | Chen | Aaron | M | California | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 127219 | Chen | Cheng | M | Shanghai | CN | 1 | Nike ACG Ultra-Trail Chongli 168km 2025 (48 hours) |
| 127737 | CHEN | CHUN TING | M | Taiwan | TW | 1 | Formosa Trail 104km 2024 (28 hours) |
| 124530 | Chen | Ci Hang | M | NY | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 121101 | Chen | Da | M | WA | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 124737 | Chen | Gang | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 108402 | Chen | Gang | M | CA | US | 8 | Bear, The 100M 2025 (36 hours) † |
| 127363 | Chen | Haiyan | F | WA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) |
| 124011 | Chen | Hongbing | M | California | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 126905 | Chen | Julia | F | BC | CA | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 122289 | CHEN | LIN | F | SHANXI | CN | 2 | Black Canyon 100km 2025 (17 hours) † |
| 121566 | Chen | Mei | F | WA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 100841 | Chen | Ying | M | CA | US | 64 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126209 | CHENE | NICOLAS | M | Seine-Saint-Denis | FR | 1 | Mallorca by UTMB: Serra de Tramuntana (SDT) 135km 2025 (30 hours) |
| 125170 | Cheney | Jacob | M | Utah | US | 1 | Zion 100M 2025 (36 hours) † |
| 126531 | Cheng | Hau Chung | M | CA | US | 1 | TransLantau Ultra Trail by UTMB 100km 2024 (28 hours) |
| 100288 | Cheng | Yuanchao | M | AUS | AU | 256 | Surf Coast Century 100km 2025 (17 hours) |
| 126669 | Cheong | Chester | M | Singapore +65 | SG | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 101180 | Cheong | Ka Pou | M | MAC | MO | 16 | Swiss Alps 100M 2025 (50 hours) |
| 127650 | Cheong | Youngjun | M | Gyeonggi-do | KR | 1 | Transjeju by UTMB 150km 2025 (37 hours) |
| 123420 | Cherief | Valentin | M | Occitanie | FR | 1 | Grand Raid Ventoux by UTMB 124km 2025 (30 hours) |
| 123583 | Cheripka | Daniel | M | Pennsylvania | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 126873 | Cherrington | Clinton | M | OH | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 124751 | Cherry | Brandi | F | TN | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 125099 | CHERTA BALLESTER | RICARDO | M | Castelló | ES | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 101660 | Cherviakov | Aleksandr | M | RUS | RU | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 118161 | Chessex | Vincent | M | Vaud | CH | 4 | Swiss Canyon Trail 111km 2025 (24 hours) |
| 101443 | Cheung | Kashing | M | HKG | HK | 2 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 127146 | Cheung | Kenneth | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 100076 | Cheung | Wilson | M | HKG | HK | 4 | TransLantau Ultra Trail by UTMB 120km 2024 (36 hours) |
| 103526 | Chew | Denis | M | AUS | AU | 32 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 124371 | Chew | Kristine | F | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 126356 | Chiang | Lu Chung | M | Zhongli | TW | 1 | Mt Fuji 100M 2025 (46 hours) |
| 123261 | Chiapella | Geoffrey | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 100944 | Chiasson | Hailey | F | CA | US | 64 | Rio Del Lago 100M 2025 (30 hours) |
| 127000 | Chibane | Alexandre | M | Yvelines | FR | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 118631 | Chick | Michael | M | OH | US | 4 | Canal Corridor 100M 2025 (30 hours) † |
| 113560 | chico | luis javier | M | catalunya | ES | 8 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 114122 | Chida | Makoto | M | Tokyo | JP | 4 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 124572 | Chidester | Devin | M | NC | US | 1 | Zion 100km 2025 (19 hours) |
| 101370 | Chidester | Jason | M | GA | US | 64 | Zion 100km 2025 (19 hours) |
| 106518 | Chieh | Baldwyn | M | CA | US | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 102227 | Chiknavaryan | Stanislav | M | WA | US | 32 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125624 | Childs | Brandon | M | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 112437 | Childs | Mike | M | NY | US | 8 | Twisted Branch 100km 2025 (20 hours) † |
| 122104 | Chimal | Andreina | F | CA | US | 2 | Angeles Crest 100M 2025 (36 hours) |
| 125138 | Chin | Wayne | M | NY | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 126447 | Chinchilla | Geovanni | M | SAN JOSE | CR | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 117535 | Ching | Flora wing yee | F | Hk | HK | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 127579 | Chinnahunha | Arinnakorn | M | Suratthani | TH | 1 | HOKA Chiang Mai Thailand by UTMB Trans-Int 160 175km 2024 (48 hours) |
| 120487 | Chiou | Bryan | M | CA | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 125145 | Chiquiti | Rodrigo | M | Paraná | BR | 1 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 127449 | Chisholm | Brody | M | New Hampshire | US | 1 | Bigfoot 206M 2025 (100 hours) † |
| 127450 | Chisholm | Jennie | F | NH | US | 1 | Cocodona 250M 2025 (125 hours) |
| 108843 | Chittenden | Stuart | M | Surrey | GB | 8 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 102893 | Chiu | Daniella | F | GBR | GB | 8 | TransLantau Ultra Trail by UTMB 100km 2024 (28 hours) |
| 115061 | Chiu | Sebastian | M | NY | US | 4 | Vermont 100M 2025 (30 hours) |
| 127510 | Chmiel | George | M | CA | US | 1 | San Diego 100M 2025 (32 hours) † |
| 116507 | Chmielewski | Max | M | WA | US | 4 | Hood Hundred 100M 2025 (34 hours) |
| 127076 | Cho | Linus | F | Washington | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 112434 | Choe | Terri | F | California | US | 8 | Quicksilver 100km 2025 (17 hours) † |
| 112713 | Choi | Geum | F | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 121178 | CHOI | HUNYOUNG | M | GYEONGGI-DO | KR | 2 | HOKA Chiang Mai Thailand by UTMB Trans-Int 160 175km 2024 (48 hours) |
| 121365 | CHOI | JONG DU | M | Gyeonggi-do | KR | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 119132 | Choi | Justin Ryan | M | NY | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127366 | Choi | Pui Hing | M | New Territories | HK | 1 | Ninghai Ultra Trail 109km 2025 (24 hours) |
| 109347 | Chojnicki | Bartosz | M | Wielkopolska | PL | 16 | Krakonosova Stovka 100km 2025 (22 hours) |
| 110458 | CHOPPE | YANN | M | Quebec | CA | 1 | Western States 100M 2025 (30 hours) † |
| 121583 | CHOTARD | Jean-Luc | M | France | FR | 2 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 114347 | Choukri | Sam | M | CA | US | 4 | Cuyamaca 100km 2025 (17 hours) † |
| 127714 | Chouraqui | Tom | M | Quebec | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 113517 | Chow | Justin | M | BC | CA | 1 | Western States 100M 2025 (30 hours) † |
| 125970 | Chow | William | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 125125 | Chrétien | Véronique | F | QC | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 120638 | Chrisman | Seth | M | Oregon | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 116567 | Christau | Stephanie | F | MA | US | 2 | Mountain Lakes 100M 2025 (30 hours) † |
| 104602 | Christensen | Garret | M | NV | US | 4 | IMTUF 100M 2025 (36 hours) † |
| 125174 | Christensen | Garrett | M | UT | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 114403 | christensen | leif | M | South Australia | AU | 8 | Guzzler Ultra 100km 2025 (24 hours) |
| 122491 | Christensen | Shelbie | F | Wyoming | US | 2 | Leona Divide 100km 2025 (17 hours) |
| 121522 | Christensen | Steven | M | NC | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 127288 | Christiansen | Darren | M | Texas | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 124640 | Christiansen | Rachael | F | CO | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 104878 | Christman | Eric | M | PA | US | 32 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 110589 | Christopher | Saint-Alme | M | France | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 104072 | Christopherson | David | M | UT | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 114549 | Christopherson | Mark | M | Utah | US | 8 | Bear, The 100M 2025 (36 hours) † |
| 118286 | Chrysler | Andrew | M | ID | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 127740 | CHUN | Sunjung | F | Jongro-gu | KR | 1 | Nike ACG Ultra-Trail Chongli 168km 2025 (48 hours) |
| 127818 | Chung | Aidan Wing Ho | M | New Territories | HK | 1 | Chiangmai by UTMB Elephant 100km 2024 (22 hours) |
| 112040 | Chung | Clement | M | New York | US | 8 | North Downs Way 100M 2025 (30 hours) |
| 125689 | Chung | Franklin | M | NY | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 103758 | Chung | Hyun Chang | M | HKG | HK | 1 | Western States 100M 2025 (30 hours) † |
| 121868 | CHUNG | YI LIN | M | NA | TW | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124657 | Church | Maura | F | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 117715 | Churchill | Andrew | M | London | US | 4 | North Downs Way 100M 2025 (30 hours) |
| 115861 | Chutter | Stuart | M | SK | CA | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 125260 | CHZHAN | Tsen Tsz | M | British Columbia | CA | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124864 | Ciapponi | Alice | F | Italia | IT | 1 | Tuscany Crossing 160km 2025 (35 hours) |
| 113132 | Ciarrocchi | Nick | M | Pennsylvania | US | 4 | Eastern States 100M 2025 (36 hours) |
| 109851 | Cibulka | Jeramia | M | Colorado | US | 16 | Grindstone by UTMB 100km 2025 (18 hours) |
| 127990 | Cicalese | Bob | M | Pennsylvania | US | 1 | Vermont 100M 2025 (30 hours) |
| 103660 | Ciclitira | Simone | M | ITA | IT | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 122655 | Ciesielski | Maegan | F | AB | CA | 2 | Lost Soul Ultra 100M 2025 (33 hours) † |
| 127154 | Cieslar | Alan | M | Cumbria | GB | 1 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 116276 | Cieslar | Jakub | M | 09148087 | CZ | 4 | Salomon Ultra-Trail Hungary 112km 2025 (20 hours) |
| 126261 | Cikovic | Alex | M | UT | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 120951 | Cioppi | Dianna | F | AL | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 107610 | Cirstoveanu | Daniel | M | Bucharest | RO | 1 | Western States 100M 2025 (30 hours) † |
| 101030 | Cissel | Shawn | M | MD | US | 32 | C & O Canal 100M 2025 (30 hours) † |
| 113400 | Ciudad | David | M | Tarragona | ES | 4 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 108539 | Claassen | Daniel | M | Western Cape | ZA | 16 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 127196 | Claassen | Phillip | M | OH | US | 1 | Burning River 100M 2025 (30 hours) |
| 110082 | Claflin | Elizabeth | F | CO | US | 8 | Leadville Trail 100M 2025 (30 hours) |
| 122148 | Claiborne | Katie | F | NY | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 117575 | CLAMONS | Arnaud | M | HAUTE VIENNE | FR | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 118808 | Clancy | Kevin | M | California | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 123687 | Clancy | Thomas | M | IL | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 127226 | clarella peiro | arnau | M | Barcelona | ES | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 107906 | clark | alan | M | Middlesex | GB | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 115556 | Clark | Alyssa | F | California | US | 4 | HURT 100M 2025 (36 hours) † |
| 126769 | Clark | Ben | M | Ohio | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 118359 | Clark | Brandon | M | OH | US | 4 | Grindstone by UTMB 100km 2025 (18 hours) |
| 100977 | Clark | Britta | F | VT | US | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 117379 | Clark | Chuck | M | TX | US | 4 | Never Summer 100km 2025 (23 hours) |
| 127811 | Clark | Ella | F | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 110369 | Clark | Erin | F | MT | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 117408 | Clark | Jeff | M | CA | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 123519 | Clark | Joe | M | UT | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 107150 | Clark | Joshua | M | FL | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 108338 | Clark | Mike | M | AZ | US | 16 | Wasatch Front 100M 2025 (36 hours) |
| 127715 | Clark | Mitch | M | Nsw | AU | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 116469 | Clark | Nick | M | MI | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 121425 | Clark | Sarah | F | WA | US | 2 | Wasatch Front 100M 2025 (36 hours) † |
| 118674 | Clark | Skye | M | Western Province | ZA | 4 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 110318 | Clark | Stephen | M | Zurich | CH | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 123874 | Clark | Taylor | M | Colorado | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 104001 | Clark | Trey | M | AL | US | 32 | Georgia Death Race 74M 2025 (24 hours) † |
| 125261 | Clarke | Alex | M | NY | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 104626 | Clarke | Brody | M | AUS | AU | 8 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 120129 | Clarke | Henry | M | NY | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 107932 | Clarke | Liz | F | CA | US | 8 | Angeles Crest 100M 2025 (36 hours) † |
| 118927 | Clarke | Nicole | N | NC | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 121069 | Clarry | Charlie | M | Alberta | CA | 2 | Lost Soul Ultra 100M 2025 (33 hours) |
| 105123 | Clause | Tamara | F | AZ | US | 16 | Yeti Virginia 100M 2025 (30 hours) † |
| 114457 | Claußnitzer | René | M | Bavaria | DE | 2 | Zugspitz 100M 2025 (48 hours) |
| 108334 | Clavijo | Fabio | M | VA | US | 8 | C & O Canal 100M 2025 (30 hours) † |
| 105106 | Clay | Emily | F | MD | US | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 112336 | Clayton | Ben | M | KY | US | 8 | Sedona Canyons 125M 2025 (52 hours) |
| 125101 | Clayton | John | M | Maryland | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 106182 | Clayton | Ryan | M | IN | US | 64 | Black Canyon 100km 2025 (17 hours) † |
| 120575 | Claytor | Wesley | M | NC | US | 2 | Long Haul 100M 2025 (30 hours) |
| 122082 | Clear | Jeff | M | AZ | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 109210 | Cleary | Richard | M | Kerry | IE | 2 | Mozart by UTMB 119km 2025 (23 hours) |
| 124370 | Cleland | Stuart | M | British Columbia | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 116186 | Clemens | Rob | M | BC | CA | 4 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 111536 | Clement | Antoine | M | France | FR | 8 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 126145 | Clément | Mathieu | M | Fribourg | CH | 1 | Mt Fuji 100M 2025 (46 hours) |
| 114020 | Clements | Bill | M | CA | US | 8 | Tarawera by UTMB 102km 2025 (17 hours) |
| 124934 | Clements | Bob | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 116456 | Clements | Ed | M | Somerset | GB | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 112486 | Clements | Tyler | M | Washington | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 127100 | clementucci | Michele | M | SI | IT | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 117674 | Clemons | Damian | M | NY | US | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 112018 | Clemons | Makai | M | CA | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 119224 | Clere | Joanna Maria | F | Alaska | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123853 | Clermont | Cody | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 114491 | Cleveland | Josh | M | CA | US | 2 | Waldo 100km 2025 (18 hours) † |
| 127682 | Clic | Marta | F | Italy | IT | 1 | Tuscany Crossing 103km 2025 (21 hours) |
| 112810 | Clifford | Ryan | M | NY | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 127785 | Clifton | Adam | M | Michigan | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 100202 | Clifton | Lou | F | AUS | AU | 4 | Leadville Trail 100M 2025 (30 hours) |
| 126748 | Clifton | Warren | M | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 114688 | Cline | Alec | M | OH | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 119947 | Cline | Casey | F | NC | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 100807 | Clinthorne | Ashley | F | CO | US | 256 | Pinhoti 100M 2025 (32 hours) † |
| 118648 | Clissold | James | M | Utah | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 120750 | Cloarec | Mathieu | M | France | FR | 2 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 119018 | Close | Gregory | M | NY | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 124834 | Cloutier | Simon | M | NC | US | 1 | No Business 100M 2025 (34 hours) |
| 112735 | Clowdus | TJ | M | TX | US | 2 | Dinosaur Valley 100km 2024 (22 hours) |
| 119667 | Clowes | Carson | M | California | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 119885 | Cluett | Jonathan | M | MA | US | 2 | Vermont 100M 2025 (30 hours) |
| 119787 | Coakes | Matthew | M | Surrey | GB | 2 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 125028 | Coaldrake | Tristan | M | Iowa | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 119730 | Coats | Joey | M | LA | US | 2 | HOKA Bandera 100km 2025 (17 hours) |
| 125484 | Cobbler | Bernie | M | Maryland | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 116843 | Cobos | David | M | Oregon | US | 4 | Bigfoot 206M 2025 (100 hours) † |
| 115320 | Coccia | Jacob | M | Virginia | US | 4 | Hellgate 100km 2024 (17 hours) |
| 115210 | Coccia | Jared | M | Virginia | US | 4 | Hellgate 100km 2024 (17 hours) |
| 126536 | Coccimiglio | Mike | M | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 108684 | Cocco | Luis | M | Fl | US | 2 | Long Haul 100M 2025 (30 hours) † |
| 102632 | Cochou | Pierre | M | NCL | NC | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 111389 | Cochrane | Simon | M | WaikatoTasman | NZ | 8 | Taupo 100km 2025 (17 hours) |
| 100547 | Cody | Ryan | M | NM | US | 32 | Bighorn 100M 2025 (35 hours) |
| 113529 | Coe | Jodine | F | ID | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 124607 | Coe | Shaun | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 104897 | Coen | Andy | M | NE | US | 32 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 124076 | Coenen | Jack | M | Victoria | AU | 1 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 112977 | Coffey | Ethan | M | TN | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 114453 | Coffey | Meghann | F | WA | AU | 2 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 113939 | Coffman | Hunter | M | CA | US | 4 | Tahoe 202M 2025 (100 hours) † |
| 100515 | Coggin | Emily | F | CO | US | 64 | Run Rabbit Run 100M 2025 (36 hours) |
| 119569 | Coggins | Zachary | M | NC | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 119887 | Coghlan | Billy | M | North Carolina | US | 2 | Canal Corridor 100M 2025 (30 hours) † |
| 109885 | Cognet-Fante | Gerard | M | Hessen | DE | 2 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 125641 | Cohen | Artie | M | Utah | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 126935 | Cohen | Cerrone | M | NC | US | 1 | Umstead 100M 2025 (30 hours) |
| 124970 | Cohen | Justin | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 110548 | Cohen | Mitchell | M | CO | US | 16 | Run Rabbit Run 100M 2025 (36 hours) |
| 113534 | Cohen | Sam | M | DC | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 113069 | Cohen | Yung | M | NY | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 125870 | Coil | Kaitlyn | F | ID | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 118647 | COINTREL PORZUCEK | Aline | F | Île-de-France | FR | 2 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 124149 | Coker | Nathaniel | M | MI | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 125842 | Colangelo | Christopher | M | CT | US | 1 | Vermont 100M 2025 (30 hours) |
| 100680 | Colantuono | Lucas | M | ARG | AR | 64 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 127289 | Colby | Zach | M | Utah | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 126189 | Colclough | Chris | M | Maryland | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 126691 | Cole | Elliot | M | Auckland | NZ | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 115590 | Cole | Grant | M | PA | US | 4 | Twisted Branch 100km 2025 (20 hours) † |
| 112118 | Cole | Max | M | WA | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 108340 | Cole | Patrick | M | Colorado | US | 16 | Cascade Crest 100M 2025 (34 hours) |
| 118733 | Cole-Jones | Dylan | M | Queensland | AU | 2 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 115439 | Colebatch | Lachan | M | Victoria | AU | 4 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 127291 | Coleman | Elizabeth | F | TX | US | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 127612 | Coleman | Fred | M | WI | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 104201 | Coleman | Jason | M | MO | US | 32 | Arkansas Traveler 100M 2025 (30 hours) |
| 120497 | Coleman | Josh | M | Arizona | US | 2 | Moab 238M 2025 (108 hours) † |
| 115216 | Coleman | Kaden | M | UT | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 113998 | Coleman | Sutton | M | AL | US | 8 | Yeti Virginia 100M 2025 (30 hours) † |
| 111284 | Coles | Michael | M | North West | ZA | 8 | SkyRun 100km 2024 (28 hours) |
| 125464 | Colfack | Rich | M | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 127667 | Colgan | David | M | NC | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 107391 | Collier | Chris | M | California | US | 4 | San Diego 100M 2025 (32 hours) † |
| 121460 | Collier | Kristofer | M | West Yorkshire | GB | 2 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 120534 | Collin | Andrew | M | Saskatchewan | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 103384 | Collin | Mat | M | AUS | AU | 128 | Guzzler Ultra 100km 2025 (24 hours) |
| 100007 | Collin | Robert | M | WA | US | 16 | Cascade Crest 100M 2025 (34 hours) |
| 123505 | Collina Jr | Gary | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 125064 | Collins | Cathie | F | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 110810 | Collins | Chuck | M | MO | US | 16 | IMTUF 100M 2025 (36 hours) † |
| 111218 | Collins | Daniel | M | NM | US | 2 | Dinosaur Valley 100km 2024 (22 hours) |
| 127978 | Collins | Donald | M | VA | US | 1 | Bighorn 100M 2025 (35 hours) |
| 123881 | Collins | Ken | M | North Carolina | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 103113 | Collins | Matt | M | CO | US | 8 | Crazy Mountain 100M 2025 (36 hours) † |
| 105969 | Collins | Matt | M | NY | US | 64 | Angeles Crest 100M 2025 (36 hours) † |
| 106746 | Collins | Pierre | M | QC | CA | 32 | Canyons by UTMB 104km 2025 (20 hours) |
| 114492 | Collins | Samuel | M | UT | US | 4 | Run Rabbit Run 100M 2025 (36 hours) † |
| 101990 | Collins | Tabatha | F | WA | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 127454 | Collinson | Mark | M | North Yorkshire | GB | 1 | Valleys Ultra (13) 180km 2025 (46.5 hours) |
| 123174 | Collison | Kim | M | England | GB | 2 | Bighorn 100M 2025 (35 hours) |
| 124221 | Collum | Christopher | M | TX | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 126575 | Colmer | Graham | M | Dublin | IE | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 125948 | Colososchi | Joao | M | Sao Paulo | BR | 1 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 117808 | Colque | Christian | M | Cordoba | AR | 2 | Brazil 100M 2025 (40 hours) |
| 103913 | Colt | Jeffrey | M | CO | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 118865 | Colton | Casey | M | OR | US | 4 | Mountain Lakes 100M 2025 (30 hours) † |
| 117478 | Colton | Eric | M | OR | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 124785 | Colvin | Byron | M | MO | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 114883 | Colwell | Sarah | F | Maryland | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 124667 | Combs | Leah | F | KY | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 123128 | COMINELLI | ALESSANDRO | M | ITALIA | IT | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 127254 | Comollo | Stefano | M | Piemonte | IT | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 109666 | Compan | Jennifer | F | WI | US | 16 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 102412 | Composto | Nicolas | M | MT | US | 32 | Never Summer 100km 2025 (23 hours) |
| 119602 | Condit | Adam | M | WI | US | 2 | Tunnel Hill 100M 2024 (30 hours) |
| 105940 | Condon | Brian | M | CO | US | 16 | Kettle Moraine 100M 2025 (30 hours) † |
| 105636 | Condrati | Cesar | M | Parana | BR | 32 | No Business 100M 2025 (34 hours) |
| 124211 | Cone | Brian | M | VA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 114204 | Congdon | Jeff | M | WA | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 115603 | Congram | Ben | M | Ontario | CA | 4 | Worlds End 100km 2025 (19 hours) |
| 127304 | Conillera Vilar | Ferran | M | Barcelona | ES | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 103951 | Conine | Scott | M | GA | US | 8 | Georgia Death Race 74M 2025 (24 hours) † |
| 127855 | Conlan | Chris | M | London | US | 1 | Autumn 100M 2025 (28 hours) |
| 116250 | Connell | Brendan | M | Arkansas | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 112102 | Connell | Gaelan | M | British Columbia | CA | 4 | Waldo 100km 2025 (18 hours) † |
| 125008 | connell | ian | M | connecticut | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 123862 | Connelly | John | M | Illinois | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 122188 | Conner | Brandon | M | GA | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 100517 | Conner | David | M | CO | US | 256 | Canal Corridor 100M 2025 (30 hours) † |
| 107234 | Conner | William | M | CA | US | 16 | Oregon Cascades 100M 2025 (32:01:18 hours) † |
| 101574 | Connolly | Nicholas | M | NV | US | 128 | Black Canyon 100km 2025 (17 hours) † |
| 126602 | Connor | Brian | M | MA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 112783 | Conrad | Alexander | M | California | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 103047 | Conrad | Jacob | M | OH | US | 8 | Mohican 100M 2025 (32 hours) |
| 109685 | Conrad | Sara | F | Minnesota | US | 2 | Superior 100M 2025 (38 hours) † |
| 118170 | Constantino | Carlos | M | Oxfordshire | GB | 4 | Autumn 100M 2025 (28 hours) |
| 123491 | Contardi | Petronela | F | State | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 109305 | Conte | Julien | M | Quebec | CA | 8 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 127672 | Conte | Nicholas | N | New Jersey | US | 1 | Vermont 100km 2025 (17 hours) |
| 124204 | Conti | Anthony | M | Florida | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 111207 | Conti | Mike | M | Florida | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 117974 | Contino | Robin | F | Maryland | US | 4 | Hellgate 100km 2024 (17 hours) |
| 114528 | Cook | Aaron | M | WI | US | 8 | Superior 100M 2025 (38 hours) |
| 125351 | Cook | Allan | M | OHIO | US | 1 | No Business 100M 2025 (34 hours) |
| 118939 | Cook | Anne-Marie | F | NSW | AU | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 126636 | Cook | Chris | M | TN | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 102861 | Cook | Kelly | M | TX | US | 2 | Dinosaur Valley 100km 2024 (22 hours) |
| 126835 | Cook | Matthew | M | Texas | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 116478 | Cook | Matthew | M | TN | US | 4 | Vermont 100M 2025 (30 hours) |
| 122915 | Cook | Richard | M | WA | US | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 123585 | Cook | Shane | M | CA | US | 1 | San Diego 100M 2025 (32 hours) † |
| 127944 | Cooke | Ray | M | N.C. | US | 1 | Umstead 100M 2025 (30 hours) |
| 110309 | Cooksey | Andy | M | Surrey | GB | 8 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 120872 | Cooley | Jorge | M | Baja California | MX | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 123767 | Coombes | Chris | M | QLD | AU | 1 | Guzzler Ultra 100km 2025 (24 hours) |
| 115423 | Coombes | Drew | M | Nc | US | 4 | Sedona Canyons 125M 2025 (52 hours) |
| 120594 | Coomes | Chad | M | OH | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 108611 | Coon | Chad | M | IDAHO | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 106298 | Coon | Kelsey | F | CO | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 118147 | Coon | Taelor | F | CA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 122799 | Coone | Lonnie | M | TX | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 125211 | Cooper | Aaron | M | CA | US | 1 | Nuts Ylläs Pallas 100km 2025 (22 hours) |
| 126537 | Cooper | Adam | M | Merseyside | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 126593 | Cooper | Andrew | M | GA | US | 1 | Hellbender 100M 2025 (40 hours) † |
| 108048 | Cooper | Brandon | M | CO | US | 8 | Mountain Lakes 100M 2025 (30 hours) † |
| 123915 | Cooper | Chris | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 127400 | Cooper | Cody | M | NB | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 112176 | Cooper | Craig | M | Utah | US | 8 | Zion 100km 2025 (19 hours) |
| 124813 | Cooper | Erick | M | Maryland | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 114867 | Cooper | Lyndon | M | Essex | GB | 4 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 115368 | Cooper | Meryl | F | Aberdeenshire | GB | 2 | Swiss Alps 100km 2025 (22 hours) |
| 118011 | Cooper | Samuel | M | CA | US | 4 | Bighorn 100M 2025 (35 hours) |
| 126670 | Coorssen | Campbell | M | WY | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 125881 | COOTE | DAVID | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 126555 | Coover | Brian | M | VA | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 126236 | Copeland | Patrick | M | GA | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 118479 | Copenhafer | Jordan | M | Pennsylvania | US | 4 | Cocodona 250M 2025 (125 hours) |
| 120815 | COPPERE | Pierre-Henry | M | London | GB | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 124466 | Corbet | Blake | M | MN | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 110367 | Corbett | Jason | M | Arizona | US | 4 | Moab 238M 2025 (108 hours) † |
| 101077 | Corbett | Sam | M | CA | US | 32 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 120153 | Corbett | Sheila | F | British Columbia | CA | 2 | Nuts Ylläs Pallas 327km 2025 (100 hours) |
| 112767 | Corcione | Joseph | M | Arizona | US | 8 | Tahoe 202M 2025 (100 hours) † |
| 124529 | Corcione | Lexi | F | Arizona | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 125343 | Corcoran | Ella | F | Northamptonshire | GB | 1 | North Downs Way 100M 2025 (30 hours) |
| 120435 | Corcoran | Louis | M | Colorado | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 117653 | Corcoran | Robert | M | MO | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 104420 | Cordas | David | M | KY | US | 8 | Umstead 100M 2025 (30 hours) |
| 122252 | Cordeiro | Daryll | M | Mississippi | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 122668 | Cordey | Pierre-André | M | Fribourg | CH | 2 | Scenic Trail 130km 2025 (38 hours) |
| 126902 | Corentin | Fournier | M | France | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 112095 | Corey | Adam | M | NC | US | 8 | No Business 100M 2025 (34 hours) |
| 105224 | Corey | Brian | M | UT | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 105197 | Corgard | Brian | M | MN | US | 1 | Western States 100M 2025 (30 hours) † |
| 115845 | Coriele | Silvia | F | Varese | IT | 4 | Fat Dog 100km 2025 (24 hours) |
| 117658 | Corinne | Michaud | F | Chamonix | FR | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 116609 | Corman | Casey | M | California | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 116705 | Corman | Martine | F | California | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 123610 | Cormier | David | M | Québec | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 126794 | Cormier | Ryan | M | MD | US | 1 | Vermont 100km 2025 (17 hours) |
| 113047 | Cornea | Ana | F | WA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 126244 | Cornell | Arlen | M | Idaho | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 106326 | Cornell | Nicolas | M | ME | US | 16 | Sulphur Springs 100km 2025 (18 hours) |
| 122872 | Cornett | Josh | M | AL | US | 1 | Umstead 100M 2025 (30 hours) |
| 127734 | Cornic | François | M | - | FR | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 113475 | CORNUAU | Damien | M | Hauts de France | FR | 8 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 109966 | Corona | Vincent | M | Tennessee | US | 16 | No Business 100M 2025 (34 hours) |
| 124979 | Correa | Caleb | M | VA | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 108209 | Correa | Sarah | F | Ca | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 126131 | Correas | Guillermo | M | Catalunya | ES | 1 | Penyagolosa 106km 2025 (26 hours) |
| 107196 | Corrigan | Rachel | F | Virginia | US | 16 | Hellgate 100km 2024 (17 hours) |
| 125825 | Corripio | Allie | F | ACT | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 127491 | Corriveau | Joannie | F | Ontario | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 116556 | Corso | Elia | M | Italia | IT | 4 | TOR130 - Tot Dret 130km 2025 (44 hours) |
| 125637 | Cortell | Perry | M | OR | US | 1 | Waldo 100km 2025 (18 hours) |
| 124847 | Cortez | Elizabeth | F | PA | US | 1 | Burning River 100M 2025 (30 hours) |
| 120654 | Cortez | Victor | M | CA | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 118012 | Cortinovis | Oscar | M | Bergamo | IT | 4 | Istria by UTMB 168km 2025 (46 hours) |
| 127675 | Corwin | Sylvie | F | WA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 117505 | Cossey | Joseph | M | BC | CA | 4 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 125610 | Cossio La Rosa | Paulo Felix | M | Italy | IT | 1 | Tuscany Crossing 103km 2025 (21 hours) |
| 110362 | Costa | Brandon | M | CA | US | 8 | Quicksilver 100km 2025 (17 hours) † |
| 127032 | Costa | Nancy | F | OH | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 115693 | Costarangos | Monica | F | Panama | PA | 2 | Pinhoti 100M 2025 (32 hours) † |
| 102060 | Cote | Gilles | M | Hawaii | US | 256 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 123598 | Côté | Jean-Sébastien | M | QC | CA | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 125800 | Côté | Marline | F | Québec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 124061 | Côté | Stéphanie | F | Ontario | CA | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 101890 | Cothenet | Paul | M | CA | US | 16 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 127313 | Cotnoir | Jessica | F | VT | US | 1 | Vermont 100M 2025 (30 hours) |
| 126894 | Cotter | Brigid | F | California | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 111880 | Cotton | Ryan | M | Washington | US | 8 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 109524 | Cottrell | Bill | M | OR | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 112730 | Coubrough | Benn | M | New South Wales | AU | 8 | Moab 238M 2025 (108 hours) † |
| 117999 | Couget | Julien | M | Hautes Pyrenees | FR | 2 | Grand Raid des Pyrénées - Tour de Cirques 123km 2025 (40 hours) |
| 104144 | Coughlan | Sean | M | AR | US | 64 | Bighorn 100M 2025 (35 hours) |
| 101962 | Coughlin | Drew | M | CA | US | 32 | Miwok 100km 2025 (15:30:59 hours) |
| 100052 | Coughlin | Pamela | F | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 124470 | Coughlin | Rita | F | GA | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 104037 | Coulombe | Martin | M | ON | CA | 16 | Lost Soul Ultra 100M 2025 (33 hours) † |
| 124878 | Coulombe | Martin | M | Quebec | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 121230 | Coulombel | Gael | M | province sud | NC | 2 | Chiangmai by UTMB Elephant 100km 2024 (22 hours) |
| 120929 | Coulter | Trevor | M | NJ | US | 2 | Tahoe 202M 2025 (100 hours) † |
| 127246 | Couper | Christina | F | SC | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 124614 | Courtney | Alastair | M | Kent | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 117079 | Courtney | Michael | M | Hawkes Bay | NZ | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 102185 | Coury | Jamil | M | AZ | US | 1 | Western States 100M 2025 (30 hours) † |
| 109642 | Cousins | Stephen | M | West Sussex | GB | 8 | Autumn 100M 2025 (28 hours) |
| 127742 | Coutand | Clément | M | France | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 119597 | Coutu | Michael | M | MD | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 125014 | couture | jacob | M | Québec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 108407 | Couvreux | Brendan | M | Colorado | US | 16 | Beaverhead 100km 2025 (20 hours) |
| 123328 | Covi | Matteo | M | Italy | IT | 2 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 127652 | Cowan | Nigel | M | Berkshire | GB | 1 | Autumn 100M 2025 (28 hours) |
| 125344 | Cowling | Dale | M | NSW | AU | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 111891 | Cox | Charlotte | F | Ca | US | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 102976 | Cox | Kevin | M | TN | US | 256 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 104877 | Cox | Samuel | M | CA | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 126200 | Cox | Tom | M | WI | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 125567 | Cox | Trent | M | Arizona | US | 1 | Never Summer 100km 2025 (23 hours) |
| 111968 | Cox | Tyler | M | WA | US | 4 | North Downs Way 100M 2025 (30 hours) |
| 127388 | Cox | Zach | M | NY | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 102808 | Coyle | Joseph | M | PA | US | 128 | Hellbender 100M 2025 (40 hours) † |
| 127049 | Coyne | Caila | F | Michigan | US | 1 | Pinhoti 100M 2025 (32 hours) |
| 115898 | Cozad | Jared | M | CA | US | 4 | Tahoe 202M 2025 (100 hours) † |
| 123462 | Crachi | Michael | M | GA | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 123973 | Cragg | Ian | M | Gloucestershire | GB | 1 | Autumn 100M 2025 (28 hours) |
| 109057 | Craig | Jason | M | ACT | AU | 8 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 123779 | Craig | Julien | M | Québec | CA | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 116418 | Craig | Robert | M | CO | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 123732 | Craig-Mackie | Scott | M | KwaZulu Natal | ZA | 1 | Karkloof 100M 2025 (36 hours) |
| 118075 | Crain | Austin | M | TX | US | 4 | Burning River 100M 2025 (30 hours) |
| 115025 | Crain | Darrell | M | TX | US | 4 | Burning River 100M 2025 (30 hours) |
| 124120 | CRAMARD | ANNIE | F | FRANCE | FR | 1 | Nuts Ylläs Pallas 100km 2025 (22 hours) |
| 108870 | Cramer | Carmen | F | NY | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 113514 | Crandall | Jessica | F | CT | US | 4 | Eastern States 100M 2025 (36 hours) |
| 116994 | Crane | Corrie | F | CO | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 111669 | Crane | Evan | M | Scotland | GB | 8 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 120425 | Crane | Katie | F | CA | US | 2 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 126770 | Crane | Kimberly | F | Colorado | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 123802 | Craner | Chad | M | VA | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 116501 | crapps | Keith | M | SC | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 124957 | Cravens | Minam | M | UT | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 123967 | Crawford | Anne | F | England | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 124650 | Crawford | Josh | M | Tennessee | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 126939 | Crawley | Darren | M | Co>Louth | IE | 1 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 125701 | Creed | James | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 112144 | Creed | Michael | M | WA | US | 8 | Bigfoot 206M 2025 (100 hours) † |
| 114180 | Crellin | Alexis | F | Utah | US | 8 | Wasatch Front 100M 2025 (36 hours) † |
| 127615 | Cremades García | Adrián | M | valencia | ES | 1 | Penyagolosa 106km 2025 (26 hours) |
| 108808 | CRENIER | Thomas | U | France | FR | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 115435 | Crespo | Daniel | M | CO | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 117278 | cretton | morgane | F | france | FR | 4 | Swiss Canyon Trail 111km 2025 (24 hours) |
| 122380 | Crevecoeur | Guillaume | M | Oost-Vlaanderen | BE | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124062 | Crevier | Dan | M | HI | US | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 118568 | Crewe | Thomas | M | Greater London | GB | 4 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 100504 | Crews | Brandon | M | NC | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 125929 | Crichton-Turley | Courtenay | F | South yorkshire | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 124988 | Cricket | Rickety | M | CO | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 118207 | Criner | Michael | M | TX | US | 2 | Brazos Bend 100M 2024 (32 hours) |
| 122536 | Crockett | Brett | M | QLD | AU | 2 | Blackall 100km 2025 (18 hours) |
| 123626 | Crockett | Ivy | F | NM | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 124877 | Cromar | Cale | M | Utah | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 113665 | Crombez | Andi | M | Oost-Vlaanderen | BE | 8 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 121173 | Cronk | Allison | F | CA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 124209 | Cropper | Diarra | M | CO | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 108622 | Crosby | Cole | M | Rhode Island | US | 16 | Sedona Canyons 125M 2025 (52 hours) |
| 124935 | Crosby | Matthew | M | Idaho | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 126411 | Cross | Eugene | M | Greater London | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 120028 | Cross | Jim | M | Virginia | US | 2 | Mamba 100M 2024 (34 hours) |
| 123713 | Cross | Ryan | M | MN | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 124781 | Crouse Jr | Philip | M | North Carolina | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 111800 | Crouzier | Nicolas | M | MD | US | 8 | Twisted Branch 100km 2025 (20 hours) † |
| 126073 | Crow | Bennett | M | MS | US | 1 | Pinhoti 100M 2025 (32 hours) |
| 104560 | Crow | Tim | M | OH | US | 4 | Javelina Jundred 100M 2025 (30 hours) |
| 115248 | Crowe | Darren | M | Limerick | IE | 4 | Kerry Way Ultra 101km 2025 (20 hours) |
| 100868 | Crowe | Jason | M | IL | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 116315 | Crowe | Robert | N | MI | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 119784 | Crowther | Bill | M | East Yorkshire | GB | 2 | Hardwolds 80M 2024 (24 hours) |
| 112485 | Crozier | Ian | M | Essex | GB | 8 | South Downs Way 100M 2025 (30 hours) |
| 105055 | Crumley | Brent | M | ID | US | 8 | Bighorn 100M 2025 (35 hours) |
| 108395 | Crutchfield | Jen | F | MI | US | 8 | Burning River 100M 2025 (30 hours) |
| 125686 | Cruttenden | Joe | M | England | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 124033 | Cryer | Paul | M | Suffolk | GB | 1 | Autumn 100M 2025 (28 hours) |
| 124389 | Csaszar | Michael | M | Ct | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 122891 | Cuenca Montero | José Luis | M | Malaga | US | 2 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 118848 | Cueto | Austin | M | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 125084 | cui | shaochen | M | california | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 127003 | Culberson | Bradley | M | CO | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 119683 | Culbertson | Ashlyn | F | OH | US | 2 | Burning River 100M 2025 (30 hours) |
| 126639 | Culen | Pat | M | IL | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 123225 | Cull | Andrew | M | NSW | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 125750 | Cullen | Matthew | M | New York | US | 1 | Vermont 100M 2025 (30 hours) |
| 124719 | Cullen | Ryan | M | NC | US | 1 | Umstead 100M 2025 (30 hours) |
| 125954 | Cullis | Jack | M | Bristol | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 124584 | Cullum | Drew | M | MA | US | 1 | Vermont 100km 2025 (17 hours) |
| 103004 | Culmo | Brian | M | UT | US | 32 | Hardrock 100M 2025 (48 hours) † |
| 104271 | Culpepper | Chris | M | TX | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 106161 | Cummings | Alex | M | CO | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 126421 | Cummings | Derek | M | Florida | US | 1 | Dinosaur Valley 100M 2024 (35 hours) |
| 126029 | Cummings | Jennifer | F | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 111130 | Cummins | Matt | M | New Jersey | US | 8 | Hellgate 100km 2024 (17 hours) |
| 105720 | Cundy | Lance | M | OR | US | 32 | Miwok 100km 2025 (15:30:59 hours) |
| 114937 | Cunha-Rigby | Matthew | M | CA | US | 4 | Waldo 100km 2025 (18 hours) † |
| 101633 | Cunningham | Jake | M | CA | US | 32 | IMTUF 100M 2025 (36 hours) † |
| 114912 | Cunningham | Michael | M | Gauteng | ZA | 1 | Ultra Trail Drakensberg 100km 2025 (23 hours) |
| 104386 | Cunningham | Richie | M | UT | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 126100 | Cuong | Nam | M | California | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 112901 | Cupiał | Jacek | M | Slaskie | PL | 8 | Letecka Stovka 104km 2025 (21 hours) |
| 114345 | Curiston | Perry | M | Ontario | CA | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 106492 | Curley | Jacob | M | VA | US | 16 | Hellgate 100km 2024 (17 hours) |
| 101650 | Curley | Matt | M | IL | US | 128 | Grindstone by UTMB 100km 2025 (18 hours) |
| 123485 | Currence | Marsha | F | CA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 127206 | Currie | Jacquelyn | F | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 111995 | Currie | Mandy | F | saskatchewan | CA | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 126693 | Curry | Dominick | M | Florida | US | 1 | Zion 100km 2025 (19 hours) |
| 125057 | Curry | James | M | CA | US | 1 | San Diego 100M 2025 (32 hours) † |
| 100724 | Curtin | Kyle | M | CO | US | 8 | Hardrock 100M 2025 (48 hours) † |
| 127078 | Curtis | Alycia | F | Alberta | CA | 1 | Lost Soul Ultra 100km 2025 (21 hours) |
| 109195 | Curtis | Anna | F | WI | US | 16 | Bear, The 100M 2025 (36 hours) † |
| 126279 | Curtis | Bradley | M | UT | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 125492 | Curtis | Cayla | F | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 127112 | Curtis | Denise | F | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 125092 | Curtis | Diana | F | Kansas | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 124483 | Curtis | Nathan | M | CA | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 123744 | Curzel | Federico | M | Buenos Aires | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125824 | Cusker | Tom | M | MS | US | 1 | Mamba 100M 2024 (34 hours) † |
| 108544 | Cusseneers | Nick | M | Antwerpen | BE | 8 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 124700 | Custode | Tina | N | NJ | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 123699 | Cutbirth | George | M | Missouri | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 115966 | Cutler | Jonathan | M | Hampshire | GB | 4 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 104758 | Cuttle | Ben | M | GBR | GB | 32 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 106759 | Cvetkovas | Valerijus | M | Vilnius | LT | 8 | Krakonosova Stovka 100km 2025 (22 hours) |
| 125877 | Cvetkovski | Samantha | F | CA | US | 1 | San Diego 100M 2025 (32 hours) † |
| 123339 | Cwiekala | Michal | M | Derbyshire | GB | 2 | Lakeland 100M 2025 (40 hours) |
| 126721 | Cycyota | TJ | M | WA | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 102289 | Cygan | Piotr | M | POL | PL | 128 | Krakonosova Stovka 100km 2025 (22 hours) |
| 100893 | Cyphers | Meaghan | F | CO | US | 32 | Zion 100km 2025 (19 hours) |
| 125521 | Cyr | Craig | M | Ontario | CA | 1 | Lost Soul Ultra 100km 2025 (21 hours) |
| 126791 | Cyrus | George | M | Arizona | US | 1 | Moab 238M 2025 (108 hours) |
| 100393 | Czapski | Piotr | M | POL | PL | 128 | Canyons by UTMB 100M 2025 (35 hours) |
| 112505 | Czeczotková | Helena | F | Česká republika | CZ | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 103323 | D'Alessio | Joseph | M | MA | US | 1 | Gran Trail Courmayeur 100km 2025 (28 hours) |
| 116525 | D'Ambrosia | Katie | F | PA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 119219 | D'Arcy | Tyler | M | British Columbia | CA | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 125363 | d'Armagnac | Arthur | M | Ile de France | FR | 1 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 106094 | D'Onofrio | Kathy | F | CA | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 126233 | D’Anna | Antonio | M | CA | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 110345 | Daane | Lisa | F | Nevada | US | 8 | Rio Del Lago 100M 2025 (30 hours) |
| 108468 | Dąbrowski | Kamil | M | dolnośląskie | PL | 8 | Ultra Trail Vipava Valley 165km 2025 (46 hours) |
| 120221 | Dacko | Benjamin | M | NV | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 125426 | Dagenais | Guillaume | M | QC | CA | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 122999 | Dagenais | Maude | F | QC | CA | 2 | SwissPeaks 170km 2025 (58 hours) |
| 125607 | Dahl | Frank | M | KY | US | 1 | Cruel Jewel 106M 2025 (48 hours) † |
| 115673 | Dahl Sommerseth | Stian | M | Oslo | NO | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 103222 | Dai | William | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 127017 | Daigremont | Nicolas | M | France | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127132 | Daileda | Colin | M | NY | US | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 104245 | Dailey | Bruce | M | ME | US | 256 | Leadville Trail 100M 2025 (30 hours) |
| 110322 | Dailey | Steven | M | NY | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 125884 | Dailly | Nicole | F | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 100858 | Dains | Brad | M | IA | US | 128 | Hennepin 100M 2025 (30 hours) † |
| 115411 | Dakpogan | David | M | Hauts-de-Seine | FR | 2 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 125589 | Dal Bello | Samantha | F | Italy | IT | 1 | Swiss Alps 100M 2025 (50 hours) |
| 104607 | Dalal | Satpal | M | CA | US | 16 | Cuyamaca 100km 2025 (17 hours) † |
| 111148 | Dale | Kieran | M | Surrey | GB | 8 | South Downs Way 100M 2025 (30 hours) |
| 124400 | Daley | Pat | M | NC | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 103633 | Dalmasso | Luca | M | ITA | IT | 128 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 100885 | Dalton | Christopher | M | CA | US | 32 | Waldo 100km 2025 (18 hours) † |
| 123298 | Daly | James | M | London | GB | 2 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 124316 | Daly | Kaelin | M | CO | US | 1 | Zion 100M 2025 (36 hours) † |
| 102569 | Daly | Michael | M | CA | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 125502 | Daly | Patrick | M | MA | US | 1 | Zugspitz 106km 2025 (25 hours) |
| 121458 | Damarad | Aleksandr | M | Moscow | RU | 2 | Golden Ring 100km 2025 (18 hours) |
| 119244 | Damasceno | Nuno | M | Lisbon | PT | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 122007 | Damazo | Jason | M | WA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 116352 | Dameno | Andrea | M | VCO | IT | 4 | Morenic Trail 119km 2025 (22 hours) |
| 112490 | Dammann | Moritz | M | Nrw | DE | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 116562 | Damveld | Mark | M | Michigan | US | 4 | Tahoe 202M 2025 (100 hours) † |
| 110311 | Dana | Aaron | M | NY | US | 8 | Twisted Branch 100km 2025 (20 hours) † |
| 127791 | Dana | Chester | M | NB | CA | 1 | Vermont 100km 2025 (17 hours) |
| 125072 | Dangerfield | Sherman | M | UT | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 124836 | Dangler | Jeremiah | M | WA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 100951 | Daniel | Natalie | F | NC | US | 32 | Fat Dog 120M 2025 (48 hours) † |
| 117923 | Daniel | Philippe | M | Singapore | SG | 4 | Hong Kong 100K 100km 2025 (23 hours) |
| 124073 | Danieli | Mattia | M | italy | IT | 1 | Istria by UTMB 110km 2025 (24 hours) |
| 125016 | Daniels | Brandon | M | OH | US | 1 | Mohican 100M 2025 (32 hours) |
| 125865 | Daniels | Cleve | M | SA | AU | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 116442 | Daniels | Ed | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127176 | Daniels-Dyck | Cameron | M | Nova Scota | CA | 1 | Leadville Trail 100M 2025 (30 hours) |
| 127180 | Danielson | Nathan | M | Wisconsin | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 120853 | Danillon | Mathias | M | Occitanie | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 121887 | DANJOU | Alexandre | M | FRANCE | FR | 2 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 126120 | Dannenberg | Stephanie | F | VA | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 124868 | Dantonio | Bailey | F | WA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 104402 | Danyliw | Roman | M | PA | US | 64 | C & O Canal 100M 2025 (30 hours) † |
| 118529 | Danzeisen | Clara | F | Florida | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 120629 | DaPra | Edward | M | Washington | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 124837 | Daractz | Cedric | M | Rhône-Alpes | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 113491 | Darbyshire | Mark | M | West Midlands | GB | 4 | South Downs Way 100M 2025 (30 hours) |
| 127590 | Darcy | Ben | M | N.S.W | AU | 1 | Swiss Alps 100M 2025 (50 hours) |
| 102926 | Darden | Shane | M | OR | US | 32 | Rio Del Lago 100M 2025 (30 hours) |
| 108643 | Darigo | Austin | M | PA | US | 16 | Brazos Bend 100M 2024 (32 hours) |
| 110920 | Darios | Scott | M | MT | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 123026 | Darling | Samuel | M | Michigan | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 115110 | Darnand | Emilie | F | Rhône | FR | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125167 | Darnell | Jillian | F | AZ | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 114104 | Darnell | Matt | M | AZ | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 122636 | Darr | Owen | M | CO | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 100115 | Darrieutort | Xavier | M | FRA | FR | 2 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 103755 | Dart | Hank | M | ID | US | 8 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 119772 | Darvey | Fabrice | M | France | FR | 2 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 104329 | Darwin | Adam | M | AUS | AU | 8 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 112096 | Dash | Bharat | M | PA | US | 2 | Eastern States 100M 2025 (36 hours) |
| 126077 | Dasher | Sarah | F | Arizona | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 125998 | Dashow | Jason | M | AK | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 119826 | Date | Kyoko | F | Tokyo | JP | 2 | Okushinano 100km 2025 (21 hours) |
| 107805 | Dattatreya | Robi | M | Noord Holland | NL | 16 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 125730 | Daugherty | Erin | F | AZ | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 124989 | Daunt | Ashley | F | California | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 118883 | DAUPLAIS | Julien | M | QC | CA | 2 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 127701 | Davenport | Adam | M | Wisconsin | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 105285 | Davery | Gilles | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 123899 | David | Augustus | M | Texas | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 124945 | David | Heather | F | California | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 111710 | david | ivanoff | M | 170 chemin des charmilles | FR | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 115349 | DAVID | Ludovic | M | Haut de Seine | FR | 4 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 120307 | David | Thad | M | CO | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 113595 | David | TJ | M | CO | US | 2 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 126673 | Davidson | Andrew | M | WA | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 122395 | Davidson | Kevin | M | GM | GB | 2 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 125243 | Davidson | Peter | M | AZ | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 115611 | Davidson | Taylor | M | Tennessee | US | 4 | No Business 100M 2025 (34 hours) |
| 104684 | Davies | Dai | M | GBR | GB | 64 | North Downs Way 100M 2025 (30 hours) |
| 116049 | Davies | Eric | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 122346 | Davies | Gareth | M | Cumbria | GB | 2 | Autumn 100M 2025 (28 hours) |
| 127307 | Davies | Josh | M | NSW | AU | 1 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 112971 | Davies | Justin | M | OR | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 108984 | Davies | Megan | F | Other | GB | 8 | Ultra Trail do Mar√£o 120km 2025 (32 hours) |
| 112347 | Davies | Ronald | M | Berkshire | GB | 8 | North Downs Way 100M 2025 (30 hours) |
| 125544 | Davies | Stephanie | F | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 127555 | Davies | Tom | M | California | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 119521 | davila | juan manuel | M | Bogota | CO | 2 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 105134 | Davis | Aaron | M | ID | US | 32 | Fat Dog 120M 2025 (48 hours) † |
| 127687 | Davis | Alysha | F | AZ | US | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 112009 | Davis | Brad | M | CO | US | 4 | Never Summer 100km 2025 (23 hours) |
| 126729 | Davis | Brady | M | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 123529 | Davis | Christina | F | Ca | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 121039 | Davis | Cody | M | Oregon | US | 2 | Mountain Lakes 100M 2025 (30 hours) † |
| 124616 | Davis | Daniel | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 125100 | Davis | Dia | F | California | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127595 | Davis | Donna | F | Qld | AU | 1 | Blackall 100km 2025 (18 hours) |
| 122387 | Davis | Eric | M | Central Bohemia | CZ | 2 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 109458 | Davis | Ethan | M | ID | US | 16 | Beaverhead 100km 2025 (20 hours) |
| 101105 | Davis | Heather | F | AB | CA | 4 | Fat Dog 100km 2025 (24 hours) |
| 104633 | Davis | Jack | M | ZAF | ZA | 1 | Western States 100M 2025 (30 hours) † |
| 126979 | Davis | Julia | F | Cornwall | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 108153 | Davis | Kehr | F | MA | US | 8 | Sulphur Springs 100M 2025 (30 hours) |
| 124305 | Davis | Lee | M | CT | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 100775 | Davis | Mary Deane | F | GA | US | 8 | Vermont 100M 2025 (30 hours) |
| 110275 | Davis | Melissa | F | MT | US | 8 | Georgia Death Race 74M 2025 (24 hours) † |
| 126846 | Davis | Peter | M | MS | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 107264 | Davis | Scott | M | Florida | US | 16 | Sedona Canyons 125M 2025 (52 hours) |
| 117926 | Davis | Tim | M | OH | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 100437 | Davis | Tobey | F | GA | US | 32 | Vermont 100M 2025 (30 hours) |
| 125445 | Dawber | William | M | Channel Islands | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 105268 | Dawes | Jaime | F | NM | US | 1 | Western States 100M 2025 (30 hours) † |
| 114823 | Dawson | Garth | M | Auckland | NZ | 4 | Tarawera by UTMB 102km 2025 (17 hours) |
| 115930 | Dawson | Jonathan | M | California | US | 4 | Bear, The 100M 2025 (36 hours) † |
| 112895 | Dawson | Lynsey | F | Cumbria | GB | 8 | Autumn 100M 2025 (28 hours) |
| 126211 | Dawson | Sherry | F | Queensland | AU | 1 | Blackall 100km 2025 (18 hours) |
| 121132 | Dawson | Tessa | F | CO | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 125467 | Day | Albie | M | NM | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 127063 | Day | Danny | M | QLD | AU | 1 | Blackall 100km 2025 (18 hours) |
| 108742 | Day | David | M | Georgia | US | 8 | No Business 100M 2025 (34 hours) |
| 102042 | Day | Steve | M | BC | CA | 8 | Cruel Jewel 106M 2025 (48 hours) † |
| 125111 | Dayao | Amy | F | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 104310 | Daylor | Shaun | M | MA | US | 2 | Indiana 100M 2025 (30 hours) |
| 123903 | Dayrit | Melanie | F | CA | US | 1 | Sean O'Brien 100km 2025 (17 hours) |
| 102143 | De araujo Porto | Rafael | M | BRA | BR | 16 | Patagonia 100M 2025 (42 hours) |
| 120260 | De Baene | Kim | F | QC | CA | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 124053 | de Bilderling | Geoffrey | M | BW | BE | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124078 | de Bruyn | Douglas | M | Utrecht | NL | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 126938 | De Bruyn | Jérôme | M | Wallonia | BE | 1 | Swiss Alps 100km 2025 (22 hours) |
| 124252 | DE CHANTERAC | JACQUES | M | YVELINES | FR | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 116385 | De Gasperi | Roberto | M | Italy | IT | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 109433 | de Groof | Shawn | M | California | US | 16 | Quicksilver 100km 2025 (17 hours) † |
| 125223 | de Kock | Kim | F | New South Wales | AU | 1 | Surf Coast Century 100km 2025 (17 hours) |
| 106563 | De La Rosa | Ezequiel | M | CA | US | 32 | Cuyamaca 100km 2025 (17 hours) † |
| 107339 | De La Vega | Christopher | M | CA | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 100579 | De Lahitte | Hernan | M | ARG | AR | 8 | Swiss Alps 100M 2025 (50 hours) |
| 115049 | de los Cobos | Brian | M | CA | US | 4 | San Diego 100M 2025 (32 hours) † |
| 120008 | De Medeiros Soares | Marcelo | M | Rio Grande do Sul | BR | 2 | Grand Raid des Pyrénées - Ultra 160km 2025 (48 hours) |
| 116436 | DE NARP | BENJAMIN | N | France | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 104988 | De Oliva | Juan | M | NV | US | 4 | IMTUF 100M 2025 (36 hours) † |
| 100209 | De Riz | Francesco | M | ITA | IT | 8 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 116570 | de Rocquigny | Hugues | M | NSW | AU | 2 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 116886 | De Ruyter | Matthew | M | KS | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 124109 | de Villiers | James | M | London | GB | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 125953 | de Waal | Jana | F | Gloucestershire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 127054 | de Winter | Cassandra | F | AB | CA | 1 | Lost Soul Ultra 100km 2025 (21 hours) |
| 116125 | De Witt | Garrett | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 115227 | De Wulf | Alexander | M | - Select - | BE | 4 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 115515 | Deal | Sarah | F | Maryland | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 115982 | Dean | Mac | M | Tennessee | US | 2 | Hellbender 100M 2025 (40 hours) |
| 114805 | Dean-Brown | Julian | M | Western Cape | ZA | 2 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 105680 | Deaton | David | M | NJ | US | 16 | Canal Corridor 100M 2025 (30 hours) † |
| 119696 | Debacq | Thomas | M | Val de Marne | FR | 2 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 119669 | DeBastos | Kevin | M | CA | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 127445 | DeBenedetto | Laura | F | Greater London | GB | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 102105 | Debevc | Amanda | F | OH | US | 256 | Hellbender 100M 2025 (40 hours) † |
| 118176 | Debski | Katie | F | CA | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 125523 | Dechant | Nelson | M | AB | CA | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 112254 | Dechelette | Franck | M | Bouches-du-Rhône | FR | 8 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 124187 | Decker | Lisa | F | TX | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 123890 | DeDea | Kelsey | F | California | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 118174 | DeDoncker | John | M | IA | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 101362 | Deeks | Jared | M | AB | CA | 4 | Canadian Death Race 118km 2025 (24 hours) |
| 127190 | Deerkop | Kyle | M | WA | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 124162 | Deese | Josh | M | SC | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 125533 | Defalco | Mike | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 124752 | Defend | Adrien | M | Herault | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 126855 | DEFORGES | Albin | M | Ho Chi Minh City | VN | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 126632 | DeFrancesco | Lauren | F | CT | US | 1 | Umstead 100M 2025 (30 hours) |
| 102624 | Degrado | Tim | M | TN | US | 64 | Canyons by UTMB 104km 2025 (20 hours) |
| 104100 | DeGroff | Sierra | F | NV | US | 1 | Western States 100M 2025 (30 hours) † |
| 103697 | Degroot | Jeffrey | M | MI | US | 64 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 106768 | Deguchi | Nick | M | California | US | 16 | Cuyamaca 100km 2025 (17 hours) |
| 118268 | DeHaan | Megan | F | Montana | US | 2 | HURT 100M 2025 (36 hours) † |
| 115104 | DeHaan | Nicholas | M | CO | US | 2 | Bighorn 100M 2025 (35 hours) |
| 111267 | Deja | Dariusz | M | Polska | PL | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 126056 | DeJulius | Stacey | F | OH | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 121233 | Del Canizo | Miguel | M | Madrid | US | 2 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 110995 | Del Sarto | Nicolette | F | California | US | 8 | Zion 100M 2025 (36 hours) † |
| 126718 | DeLany | Will | M | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 113100 | Delarosa | Matthew | M | Colorado | US | 8 | Run Rabbit Run 100M 2025 (36 hours) |
| 123657 | Delatorre | Jesus | M | NC | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 126552 | Delattre | Devon | F | CA | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 124866 | Delay | Ty | M | Oregon | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 106770 | Delbecq | Jean-François | M | Bourgogne-Franche-Comté | FR | 1 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 115536 | Delcambre | Brad | M | Louisiana | US | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 124669 | Delgado | Samuel | M | Colorado | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 104274 | Delgado Ortiz | Silvia | F | London | GB | 2 | Lakeland 100M 2025 (40 hours) |
| 111259 | deligeard | franck | M | . | FR | 2 | Grand Raid Ventoux by UTMB 124km 2025 (30 hours) |
| 121718 | Delille | David | M | Rhône | FR | 2 | Swiss Canyon Trail 111km 2025 (24 hours) |
| 101961 | Delille | Remi | M | NC | US | 8 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 123232 | Delizee | Alexandre | M | Haute Savoie Rhône alpes | FR | 2 | Transgrancanaria 125km 2025 (28 hours) |
| 102628 | Dell Angelo | Robert | M | CA | US | 4 | Wasatch Front 100M 2025 (36 hours) |
| 125912 | Della | Aurélien | M | France | US | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 103320 | Dellamonica | Lesley | F | CA | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 127013 | Delmarre | Anne | N | CA | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 111869 | Delon | Nicolas | M | SC | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 122162 | Delorenzi | Patrick | M | TO | IT | 2 | Tuscany Crossing 160km 2025 (35 hours) |
| 123624 | Delorso | Mike | M | Pa | US | 1 | Worlds End 100km 2025 (19 hours) |
| 123396 | DeLuca | Tony | M | NE | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 120293 | Delval | Alexandre | M | Nord | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125053 | Delve | Oliver | M | Hampshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 123976 | DEMAGNY | Alexandre | M | Rhone | FR | 1 | Kerry Way Ultra 193km 2025 (40 hours) |
| 127041 | DeMann | Ryan | M | TX | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 118013 | DeMarco | Michael | M | LA | US | 2 | Crazy Mountain 100M 2025 (36 hours) † |
| 112089 | DeMeerleer | Ben | M | WA | US | 8 | Hood Hundred 100M 2025 (34 hours) |
| 119318 | Demeter | Nikolett | F | California | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 101118 | Demichele | Megan | F | CO | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 127972 | Deming | Chris | M | CA | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 114125 | Demmings | Brian | M | New Brunswick | CA | 8 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 122594 | DEMOURY | Hugo | M | France | FR | 2 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 125770 | Dempsey | Sean | M | New York | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 124219 | Dempsey | Tyler | M | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 125522 | Demtchouk | Kirill | M | CA | US | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 124057 | DeMyer | Tori | F | OR | US | 1 | Sedona Canyons 125M 2025 (52 hours) |
| 120664 | DeNardo | Lisa | F | Pennsylvania | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 106274 | Denbleyker | Tracy | F | MI | US | 4 | Moab 238M 2025 (108 hours) † |
| 123446 | Denby | Samuel | M | CO | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 109067 | Deneffe | Guillaume | M | Liège | BE | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 126390 | DENG | GUOMIN | M | GUANGDONG | CN | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 119119 | Dengg | Michael | M | Salzburg | AT | 2 | Zugspitz 106km 2025 (25 hours) |
| 120725 | Denholm | Mary | F | Colorado | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 109005 | Denis | Laurence | U | CA | US | 8 | Wasatch Front 100M 2025 (36 hours) † |
| 122304 | DENIZOT | Guillaume | M | AUVERGNE-RHONE-ALPES | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 112747 | Dennes | Jill | F | TN | US | 8 | Worlds End 100km 2025 (19 hours) |
| 106537 | Denoyelle | Thomas | M | FRA | FR | 1 | Nuts Ylläs Pallas 160km 2025 (35 hours) |
| 124376 | Dent | HOLDEN | M | NY | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 123986 | Dent | Tim | M | Moss | NO | 1 | Moab 238M 2025 (108 hours) |
| 112555 | Denter | Dean | M | Alaska | US | 2 | Tahoe 202M 2025 (100 hours) † |
| 117233 | DeNucci | Dan | M | Minnesota | US | 4 | Javelina Jundred 100M 2025 (30 hours) |
| 117895 | Deome | Harley | M | California | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 122411 | DePietro | Robert | M | PA | US | 2 | Worlds End 100km 2025 (19 hours) |
| 116629 | Deppen | Jeremy | M | Colorado | US | 4 | Rabid Raccoon 100km 2025 (22 hours) |
| 119461 | Der-Yeghiayan | Jared | M | Va | US | 2 | Hellgate 100km 2024 (17 hours) |
| 102943 | Deras | Michael | M | CA | US | 16 | Sedona Canyons 125M 2025 (52 hours) |
| 126022 | Deren | Tomasz | M | ON | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 120610 | Derkson | Ryan | M | IL | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 119413 | Dermott | Sam | M | Merseyside | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 111240 | Dermoudy | Sam | M | Queensland | AU | 2 | Blackall 100km 2025 (18 hours) |
| 112126 | deRosset | Robert | M | NC | US | 8 | Umstead 100M 2025 (30 hours) |
| 117179 | Derov | Johnny | M | Ohio | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 117340 | Derr | Bryan | M | CA | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 127033 | DERUAZ | Maëlle | F | France | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124974 | DeRuyter | Jackie | F | MA | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 114456 | Dery | Pierre-Charles | M | Quebec | CA | 4 | Quebec Mega Trail 135km 2025 (32 hours) |
| 119374 | Desai | Dnyanraj | M | Maharashtra | IN | 2 | Brazil 135M 2025 (60 hours) |
| 115092 | Desaleux | Arthur | M | Provence | FR | 4 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 126172 | Desaleux | Charles | M | Haute Savoie | FR | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 125427 | Desautels | Lauren | F | MA | US | 1 | Vermont 100M 2025 (30 hours) |
| 114382 | Deschênes | Eric | M | Québec | CA | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 103634 | Descombes | Pierre-Yves | M | FRA | FR | 32 | North Downs Way 100M 2025 (30 hours) |
| 112636 | Desemple | William | M | Washington | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 101591 | Deshaies | Eric | M | QC | CA | 128 | Black Canyon 100km 2025 (17 hours) † |
| 109895 | Desille | Clément | M | Haute Savoie | FR | 16 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 126795 | DesLauriers | Dustin | M | AB | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 112887 | DESPREAUX | JEREMY | M | HAUT DE FRANCE | FR | 8 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 121036 | Desrivières | Tanya | F | Quebec | CA | 2 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 121257 | Dessent | Benjamin | M | Mauritius | MU | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 116921 | Dessertenne | Philippe | M | QC | CA | 4 | Quebec Mega Trail 135km 2025 (32 hours) |
| 127830 | DeStefano | Matt | M | CA | US | 1 | San Diego 100M 2025 (32 hours) |
| 105499 | Detmer | Maia | F | NV | US | 4 | Cocodona 250M 2025 (125 hours) |
| 124399 | Detry | Aline | F | Ticino | CH | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 115431 | Dettelbach | Kate | F | CO | US | 2 | Never Summer 100km 2025 (23 hours) |
| 122348 | Deuzet | Tom | M | Reunion Island | RE | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 126583 | Devaraj | Deepqk | M | IL | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 115342 | DEVILLE CAVELLIN | Matthieu | M | Gironde | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 103540 | Devine | Adam | M | NY | US | 64 | Vermont 100M 2025 (30 hours) |
| 126214 | Devine | Amy | F | California | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126067 | Devine | Emily | F | Avon | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 127752 | Devlin | Emma | F | Berkshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 111600 | Devlin | Fabian | M | Merseyside | GB | 8 | Kerry Way Ultra 101km 2025 (20 hours) |
| 110473 | DeVona | Lisa | F | Florida | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 115585 | DeVoto Noonan | Terin | M | CO | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 125580 | DeVries | Bryan | M | Texas | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 106774 | Dewey | Nathan | M | 32 | No Business 100M 2025 (34 hours) | ||
| 116397 | Dewez | Jon | M | California | US | 4 | Burning River 100M 2025 (30 hours) |
| 127947 | DeWitt | Langley | F | Colorado | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 107513 | DeWitt | Lisa | F | OR | US | 16 | Waldo 100km 2025 (18 hours) † |
| 121334 | DeWitt | Nicole | F | Oregon | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) |
| 121472 | Dexters | Jonathan | M | BW | BE | 2 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 117361 | deyesso | Karen | F | ME | US | 2 | Vermont 100M 2025 (30 hours) |
| 109558 | Di Giacomo | Fabio | M | Italia | IT | 1 | Western States 100M 2025 (30 hours) † |
| 120445 | Di Iorio | Christina | F | BC | CA | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 122506 | Dias | Jeferson | M | Rio Grande do Sul | BR | 2 | Patagonia 110km 2025 (27 hours) |
| 124070 | Diaz | Daniel | M | North Carolina | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 118573 | Diaz | Gabriela | F | Mendoza | AR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 118682 | Diaz Alba | Manuel | M | malaga | ES | 2 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 103959 | Dib | Nathan | M | CA | US | 4 | Sean O'Brien 100km 2025 (17 hours) † |
| 124178 | Dibb | Matthew | M | MA | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 110629 | Diboun | Jamal | M | NY | US | 16 | Hood Hundred 100M 2025 (34 hours) |
| 101753 | Diboun | Yassine | M | OR | US | 32 | Miwok 100km 2025 (15:30:59 hours) |
| 123365 | Dick | Dallas | M | California | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 103870 | Dickason | Benjamin | M | CO | US | 128 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 107485 | Dicke | Ben | M | IL | US | 8 | Leadville Trail 100M 2025 (30 hours) |
| 114192 | Dickman | Ludvig | M | Stockholm | SE | 8 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 123958 | Dicks | David | M | Cumbria | GB | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 125285 | Dicks | Jon | M | Queensland | AU | 1 | Blackall 100km 2025 (18 hours) |
| 120414 | Dicks | Simon | M | Berkshire | GB | 2 | Autumn 100M 2025 (28 hours) |
| 124548 | Dickson | Tim | M | Colorado | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 116625 | Didier | David | M | Santa Fe | AR | 4 | Patagonia 100M 2025 (42 hours) |
| 107609 | Diehl | Melody | F | Florida | US | 4 | Cocodona 250M 2025 (125 hours) |
| 125639 | Diehm | Danae | F | Colorado | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 103856 | Dietrich | Travis | M | CA | US | 128 | Bear, The 100M 2025 (36 hours) † |
| 124208 | DiFate | Kristen | F | MO | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 122973 | Dihrkop | Kris | M | KY | US | 2 | No Business 100M 2025 (34 hours) |
| 127179 | dilger | connor | M | Oregon | US | 1 | Waldo 100km 2025 (18 hours) † |
| 124941 | Dillingham | Shelby | F | CA | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 114804 | Dillon | Michael | M | PERTHSHIRE | GB | 4 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 112182 | Dilluvio-Scott | Dandelion | F | Wyoming | US | 8 | Bear, The 100M 2025 (36 hours) † |
| 117515 | DILOSQUET | Olivier | M | Finistère | FR | 4 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 124425 | Dilworth | Sarah | F | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 122043 | DiMaggio | Kassandra | F | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 113859 | DiMarco | Nicholas | M | Texas | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 114875 | Dimitrie | David | M | Michigan | US | 4 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 121484 | Dimnet | Thomas | M | Auvergne Rhône Alpes | FR | 2 | SwissPeaks 100km 2025 (28 hours) |
| 121388 | Dimond | Michael | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 101811 | Dina | Matthew | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 127553 | Dinaburg | Dave | M | CA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 127930 | Dinampo | Ibar | M | NJ | US | 1 | Cruel Jewel 106M 2025 (48 hours) † |
| 125183 | DING | DONG | M | Anhui | CN | 1 | Ninghai Ultra Trail 109km 2025 (24 hours) |
| 126310 | Ding | Haojie | M | New Jersey | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 117741 | Ding | Jianjun | M | Beijing | CN | 4 | Ninghai Ultra Trail 109km 2025 (24 hours) |
| 116723 | Ding | Ling Li | F | BC | CA | 4 | Mt Fuji 100M 2025 (46 hours) |
| 114659 | Dinkle | Zachary | M | WI | US | 4 | Tunnel Hill 100M 2024 (30 hours) † |
| 113693 | Dinnett | Craig | M | Jersey | JE | 8 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 125578 | Dionne | Sedona | F | WY | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 124687 | Diop | Mouhamed | M | Île-de-France | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 124749 | DiPaul | Adam | M | PA | US | 1 | Rabid Raccoon 100km 2025 (22 hours) |
| 127396 | Disick | Arielle | F | NJ | US | 1 | Bighorn 100M 2025 (35 hours) |
| 113061 | Disterhaft | Thomas | M | WI | US | 8 | Indiana 100M 2025 (30 hours) |
| 116667 | Ditsworth | Russell | M | CO | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 125787 | Ditterick | Joshua | M | New South Wales | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 101617 | Dittman | Bill | M | AZ | US | 16 | Bighorn 100M 2025 (35 hours) |
| 125310 | Dittrich | Ivan | M | New York | US | 1 | Black Canyon 100km 2025 (17 hours) |
| 124514 | Dixon | Andrew | M | CA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 124160 | Dixon | Calvin | M | VT | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 120310 | Dixon | Rich | M | CA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 126584 | Dixon | William | M | NSW | AU | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125834 | Diz | Martin | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 113902 | Dlagnekov | Louka | N | California | US | 4 | San Diego 100M 2025 (32 hours) |
| 127621 | Dlouhy | Dani | F | OR | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 118721 | Do | Duy Luan | M | Hanoi | VN | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 113845 | Doane | Deanna | N | FL | US | 8 | Laurel Highlands 70.5M 2025 (20 hours) |
| 114030 | Dobberteen | Dean | M | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 101456 | Dobler | Matthew | M | AZ | US | 32 | Cuyamaca 100km 2025 (17 hours) † |
| 126688 | Dobre | Adrian | M | Ilfov | RO | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 119820 | Dobrev | Georgi | M | Sofia | BG | 2 | Istria by UTMB 110km 2025 (24 hours) |
| 119719 | Dobreva | Milena | F | Bulgaria | BG | 2 | HOKA Chiang Mai Thailand by UTMB Trans-Int 160 175km 2024 (48 hours) |
| 126186 | Dobroruka | Nicholas | M | BC | CA | 1 | Black Canyon 100km 2025 (17 hours) † |
| 126284 | Dobson | Darren | M | NV | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 101270 | Dobson | Jason | M | OR | US | 16 | Hood Hundred 100M 2025 (34 hours) |
| 103352 | Dockemeyer | Kevin | M | IL | US | 8 | Tunnel Hill 100M 2024 (30 hours) † |
| 126217 | Dockery | Thomas | M | Pennsylvania | US | 1 | Long Haul 100M 2025 (30 hours) |
| 124274 | Dodd | Daniel | M | Kentucky | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 124346 | Dodds | Madi | F | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 126843 | Dodds | Matthew | M | MN | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 118364 | Doemstedt | Carl-Johan | M | Vaestmanland | SE | 4 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 124968 | Doherty | Adrienne | F | New York | US | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 122092 | Doherty | Andy | M | NY | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 126520 | Doherty | David | M | VA | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 110764 | Dolce | Shelaine | F | WA | US | 2 | Cascade Crest 100M 2025 (34 hours) |
| 109066 | Dolezal | Ben | M | Texas | US | 4 | Zion 100km 2025 (19 hours) |
| 102012 | Dollar | Chris | M | AL | US | 16 | Pinhoti 100M 2025 (32 hours) † |
| 126915 | Dolling | Vanessa | F | Essex | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 123750 | Dolphin | Kate | F | Worcestershire | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 113584 | Domanski | Mark | M | Virginia | US | 8 | Laurel Highlands 70.5M 2025 (20 hours) |
| 125410 | Dombrowski | Mateusz | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 124661 | Dominguez Gonzalez | Evaristo Javier | M | Asturias | ES | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125855 | Domke | Nils | M | Oregon | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 123079 | Domm | Matthew | M | British Columbia | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 116085 | Domrow | Ryan | M | Alberta | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 124573 | Donald | Trenton | M | Ohio | US | 1 | Burning River 100M 2025 (30 hours) |
| 126010 | Donaldson | Bridget | F | VA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 123935 | Donchi | Lachlan | M | Victoria | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 125196 | Donegan | Dan | F | New South Wales | AU | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 127813 | Dong | Qi | M | Shanghai | CN | 1 | Ninghai Ultra Trail 109km 2025 (24 hours) |
| 119151 | Donis | Jeff | M | Ca | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 100391 | Donnelly | Matt | M | NJ | US | 16 | Laurel Highlands 70.5M 2025 (20 hours) |
| 126547 | Donohoe | Melissa | F | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 121989 | Donovan | Daniel | M | Michigan | US | 2 | Zion 100km 2025 (19 hours) |
| 127018 | Donovan | John | M | IA | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 125937 | Donovan | Ross | M | Co. Wicklow | IE | 1 | Kerry Way Ultra 193km 2025 (40 hours) |
| 120041 | Doran | Danny | M | NY | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 127320 | Dorandeu | Elizabeth | F | QC | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 110427 | dorantes | rene | M | CA | US | 16 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 117399 | Dorgan | Brian | M | NJ | US | 4 | Burning River 100M 2025 (30 hours) |
| 127455 | Dorj | Baigalmaa | F | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 122707 | Dorn | Gabriel | M | CO | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 126043 | Dornbrand-Lo | Aaron | M | New York | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 107203 | Doros | Michael | M | CA | US | 4 | Pine to Palm 100M 2025 (34 hours) † |
| 124125 | Dorow | Amy | F | WV | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 126560 | Dorr-Swendig | Brandon | M | MA | US | 1 | Vermont 100M 2025 (30 hours) |
| 114826 | Dorrance | Evan | M | Washington | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 126661 | Dorrough | Rex | M | Ca | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 117397 | Dorsch | Roger | M | Prague | CZ | 4 | Mallorca by UTMB: Serra de Tramuntana (SDT) 135km 2025 (30 hours) |
| 127982 | Dorval | Félix Antoine | M | QC | CA | 1 | Vermont 100km 2025 (17 hours) |
| 115440 | Dos Santos | Cyril | M | France | FR | 2 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 107988 | Dosch | Damian | M | Graubünden | CH | 2 | Dalmacija Ultra Trail 122km 2025 (32 hours) |
| 108243 | Dosch | Lisa | F | CA | US | 16 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 125753 | Dosier | David | M | IL | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 103366 | Doty | Kevin | M | CO | US | 4 | Hardrock 100M 2025 (48 hours) † |
| 119558 | DOU | Yingdong | M | Zhejiang | CN | 2 | DL 100 106km 2025 (26 hours) |
| 124734 | Doucette | Ben | M | Texas | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 127674 | Doucette | Brendan | M | Arizona | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 103997 | Dougherty | Heather | F | DC | US | 64 | Fat Dog 120M 2025 (48 hours) † |
| 121532 | Douglas | Bryan | M | Tennessee | US | 2 | No Business 100M 2025 (34 hours) |
| 120802 | Douglas | Ian | M | CA | US | 2 | Cocodona 250M 2025 (125 hours) |
| 125892 | Douglas | Jeremy | M | BC | CA | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123679 | Douglass | Matthew | M | California | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 109102 | Dournel | Yannick | M | NA | FR | 8 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 114295 | Dovick | Nathan | M | Alberta | CA | 2 | Lost Soul Ultra 100km 2025 (21 hours) |
| 100306 | Dowdell | Michael | M | OH | US | 128 | Vermont 100km 2025 (17 hours) |
| 115208 | Dowell | Andrew | M | Hong Kong Island | HK | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127868 | Downer | Jason | M | New Hampshire | US | 1 | Vermont 100M 2025 (30 hours) |
| 111125 | Downes | Glenn | M | MD | US | 4 | Grindstone by UTMB 100km 2025 (18 hours) |
| 117577 | Downey | Rebecca | F | CO | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 120134 | Downing | David | M | NC | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 120673 | Doxey | Rachel | F | NC | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 121459 | Doyon | Mathieu | M | Newfoundland and Labrador | CA | 2 | HURT 100M 2025 (36 hours) † |
| 124044 | Dragomir | Andrei | M | Timiș | RO | 1 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 102232 | Dragon | John | M | CO | US | 16 | Burning River 100M 2025 (30 hours) |
| 127470 | Drake | Joshua | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 124764 | Drake | Kyle | M | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 117083 | Dransfield | Thomas | M | West Yorkshire | GB | 2 | Transgrancanaria 125km 2025 (28 hours) |
| 126539 | Drapeau | Tyler | M | NJ | US | 1 | Hellbender 100M 2025 (40 hours) † |
| 107278 | Draper | Cody | M | Utah | US | 8 | Hardrock 100M 2025 (48 hours) † |
| 108803 | Drazer | Michael | M | IN | US | 16 | Superior 100M 2025 (38 hours) † |
| 127921 | Drechsler | Krista | F | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 122027 | Dreier | Jason | M | MN | US | 2 | Superior 100M 2025 (38 hours) † |
| 102029 | Drewes | Conor | M | NV | US | 64 | Rio Del Lago 100M 2025 (30 hours) |
| 118685 | Drews | Barbara | F | Zurich | US | 4 | Swiss Alps 100M 2025 (50 hours) |
| 104273 | Drexler | Benjamin | M | MN | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 111502 | Drilling | Carsten | M | ZH | CH | 8 | Swiss Alps 100M 2025 (50 hours) |
| 125656 | Driver | Blair | F | TX | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 111847 | Drobeck | Jason | M | UT | US | 4 | Bear, The 100M 2025 (36 hours) † |
| 127989 | Drolet | Vincent | M | QC | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 122127 | Drotar | Martin | M | Slovakia | SK | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125091 | drouin | Jacob | M | QC | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 109807 | Drouin | Veronique | F | Quebec | CA | 8 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 107190 | Drowne | Jeremy | M | NY | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 120042 | Drozd | Johnny | M | California | US | 2 | Saddles 100M 2025 (34 hours) † |
| 107912 | Drozda | Kimberly | F | Pennsylvania | US | 16 | Zion 100M 2025 (36 hours) † |
| 100453 | Drozdiak | Nick | M | DC | US | 1 | Western States 100M 2025 (30 hours) † |
| 124639 | Druel | Thibault | M | Haute-Savoie | FR | 1 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 117762 | Drury | Olivia | F | Buckinghamshire | GB | 4 | Thames Path 100M 2025 (30 hours) |
| 126845 | Du | Peng | M | Shui | CN | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 123927 | Du | Shunfan | M | Jiangsu | CN | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 121254 | DU | XUEJUN | M | Shanghai | CN | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 118428 | Du Plessis | Nicholaas | M | Western Province | ZA | 4 | Ultra Trail Drakensberg 100km 2025 (23 hours) |
| 127833 | Du Temple | Jay | M | Qc | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 104280 | Duarte | Chase | M | NM | US | 16 | Zion 100km 2025 (19 hours) |
| 116333 | Dube | William | M | VA | US | 2 | Yeti Virginia 100M 2025 (30 hours) |
| 107862 | DuBois | Bernadette | F | Fl | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 108001 | DuBois | Brett | M | AZ | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 123459 | Ducarre | Nicolas | M | France métropolitaine - Hors Corse | US | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 122209 | Duchnowski | Grzegorz | M | England | GB | 2 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 103600 | Ducommun | Julien | M | CHE | CH | 1 | Western States 100M 2025 (30 hours) † |
| 114763 | Dudek | Christopher | M | Pennsylvania | US | 4 | Laurel Highlands 70.5M 2025 (20 hours) |
| 112042 | Dudley | Scott | M | OR | US | 8 | Waldo 100km 2025 (18 hours) † |
| 120365 | Dudley | Tyler | M | OR | US | 2 | Waldo 100km 2025 (18 hours) † |
| 123149 | Due-Gundersen | Ingrid | F | Bærum | NO | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 116982 | Duerksen | Carter | M | NV | US | 1 | Western States 100M 2025 (30 hours) † |
| 127166 | Duerr | Andreas | M | Tirol | AT | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 124361 | Duffield | Lindsey | F | TX | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 124581 | Duffley | James | M | New Brunswick | CA | 1 | Istria by UTMB 110km 2025 (24 hours) |
| 127133 | Duffy | Paul | M | Perthshire | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 114251 | Dufoin | Florian | M | France | FR | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127047 | Dufort | Alexandra | F | Quebec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 102634 | Dufour | Christian | M | QC | CA | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 105522 | Dufour | John | M | GA | US | 2 | Pinhoti 100M 2025 (32 hours) † |
| 127327 | Dugan | Dante | N | California | US | 1 | Cocodona 250M 2025 (125 hours) |
| 113938 | Dugan | Sara | F | California | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 102944 | Dugovich | Brian | M | MT | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 104159 | Dugué | Simon | M | FRA | FR | 4 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 127167 | Duhet | Lea | F | Haute-Savoie | FR | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 125520 | Duke | Chris | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 126012 | Duke | Marybeth | F | Ohio | US | 1 | Burning River 100M 2025 (30 hours) |
| 127175 | Duke | Richard | M | WA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 113604 | Dulgar | Troy | M | OH | US | 8 | Rim to River 100M 2025 (32 hours) † |
| 127101 | Dulina | Kerry | F | GA | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 126122 | Dumas | Joël | M | Valais | US | 1 | SwissPeaks 100km 2025 (28 hours) |
| 115251 | Dumas | Stéphane | M | 78 - Yvelines | FR | 2 | Swiss Canyon Trail 111km 2025 (24 hours) |
| 101846 | Dumitrescu | Bogie | M | CO | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 122788 | Dumois | Luis | M | Jalisco | MX | 2 | Black Canyon 100km 2025 (17 hours) † |
| 126115 | Dumont Mallette | Charles | M | Quebec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 117200 | Dumortier | Quentin | M | OCCITANIE | FR | 4 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 127286 | Dunaway | Sarah | F | OR | US | 1 | Mountain Lakes 100M 2025 (30 hours) † |
| 127268 | Duncan | Lauren | F | Wisconsin | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 108029 | Duncan | Mark | M | North Yorkshire | GB | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 118650 | Duncan | Matthew | M | Colorado | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 118030 | Duncan | Samuel | M | Tennessee | US | 4 | No Business 100M 2025 (34 hours) |
| 126804 | Duncan | Silvia | F | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 107581 | Duncan | Stewart | M | Ga | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 125350 | Duncombe | Alexandra | F | Cumbria | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 112049 | Dunkley | Jennie | F | Bedfordshire | GB | 4 | Thames Path 100M 2025 (30 hours) |
| 126267 | Dunlop | Ewan | M | West Susex | GB | 1 | Autumn 100M 2025 (28 hours) |
| 102563 | Dunn | Matthew | M | AUS | AU | 8 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 122687 | DUNNA | CHAKRADHAR | M | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 118088 | Dunne | Ian | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 103678 | Dunning | Patrick | M | MI | US | 128 | Kerry Way Ultra 101km 2025 (20 hours) |
| 127839 | Dunst | Markus | M | Bavaria | DE | 1 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 100018 | Dunstall | Lee | M | GBR | GB | 1 | Western States 100M 2025 (30 hours) † |
| 123279 | Dunstan | Christopher | M | NSW | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 124401 | Duong | Dustin | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124046 | Duong | Terrance | M | Washington | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 127086 | Duperreault | Jonathan | M | Québec | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 126307 | Duperreault | Paul | M | Saskatchewan | CA | 1 | Lost Soul Ultra 100M 2025 (33 hours) † |
| 116095 | DuPont | Chase | M | CALIFORNIA | US | 4 | Cascade Crest 100M 2025 (34 hours) |
| 125104 | Dupuis | Francois-Remi | M | Quebec | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 127964 | Dupuis | Samuel | M | Quebec | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 124319 | Duran | Bryan | N | CO | US | 1 | Saddles 100M 2025 (34 hours) † |
| 124692 | Durand | Alexis | M | Quebec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 116139 | Durand | David | M | Franche comte | FR | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 103091 | Durante | Patrick | M | PA | US | 8 | Eastern States 100M 2025 (36 hours) |
| 114016 | Durgan II | Jody | M | NY | US | 2 | Umstead 100M 2025 (30 hours) |
| 108073 | Durkan | Anneke | F | Texas | US | 16 | Cascade Crest 100M 2025 (34 hours) |
| 125940 | Durkee | Sean | M | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) |
| 107215 | Durnall | Toby | M | Shropshire | GB | 2 | TransLantau Ultra Trail by UTMB 120km 2024 (36 hours) |
| 107866 | Durocher | Thomas | M | Haute-Savoie | FR | 16 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 126810 | Duryea | Josh | M | OH | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 122403 | Dussaillant | Joaquin | M | Santiago | CL | 1 | Vulcano Ultra Trail 100km 2024 (24 hours) |
| 116304 | Dusseau | Noah | M | Washington | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 126696 | Duteweert | Niels | M | Overijssel | US | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 116225 | Dutkiewicz | Laurie | F | Oregon | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 125169 | Dutra | Brandon | M | TX | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 113125 | Dutton | Whitney | F | TX | US | 8 | Brazos Bend 100M 2024 (32 hours) |
| 115039 | Duval | Ryan | M | CA | US | 4 | Bighorn 100M 2025 (35 hours) |
| 124980 | Duvall | Alexander | M | KY | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 111177 | DuVall | Calvin | M | Missouri | US | 4 | Cocodona 250M 2025 (125 hours) |
| 124010 | Duvall | Jacob | M | NY | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 125090 | Duvall | Matt | M | WI | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 125794 | DuVivier | Dana | F | OR | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 109599 | Dwitiandi | Dendi | M | Jawa Barat | ID | 8 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 113946 | Dwyer | Lindsey | F | California | US | 8 | Rio Del Lago 100M 2025 (30 hours) |
| 100219 | Dyas | Adam | M | OH | US | 16 | Vermont 100km 2025 (17 hours) |
| 116613 | Dybas | Jared | M | CT | US | 4 | Massanutten 100M 2025 (36 hours) † |
| 127242 | Dydek | Kamil | M | Polska | PL | 1 | Łemkowyna Ultra-Trail 150km 2025 (35 hours) |
| 124426 | Dye | Lindsey | F | VA | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 126903 | Dye | Richard | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 102199 | Dye | Shannon | F | TN | US | 8 | Pinhoti 100M 2025 (32 hours) |
| 105853 | Dyer | Joe | M | MD | US | 4 | Cruel Jewel 106M 2025 (48 hours) † |
| 125025 | Dzak | Morgan | F | CO | US | 1 | Zion 100M 2025 (36 hours) † |
| 110181 | Dzenis | Juris | M | Sigulda | LV | 2 | Transgrancanaria 125km 2025 (28 hours) |
| 123401 | Dziedzic | Justin | M | AZ | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 124067 | Dziedzic | Szymon | M | Poland | PL | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 125561 | Dziedzinski | Eric | M | MA | US | 1 | Vermont 100M 2025 (30 hours) |
| 103910 | Dzioba | Troy | M | AB | CA | 32 | Canadian Death Race 118km 2025 (24 hours) |
| 116338 | Eagle | Zach | M | Indiana | US | 4 | Run Rabbit Run 100M 2025 (36 hours) † |
| 122297 | Eagles | Ruth | F | Queensland | AU | 2 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 119663 | Eames | Finton | M | Victoria | AU | 2 | Buffalo Stampede 100km 2025 (23 hours) |
| 124662 | Earl | Amanda | F | OR | US | 1 | Waldo 100km 2025 (18 hours) † |
| 122874 | Earle | Adam | M | FL | US | 1 | Ultra-Trail Cape Town 100M 2024 (45 hours) |
| 103469 | Earle | Lieko | F | CO | US | 128 | Bear, The 100M 2025 (36 hours) † |
| 104383 | Early | Patrick | M | VA | US | 8 | Tunnel Hill 100M 2024 (30 hours) † |
| 117024 | Earney | John | M | CA | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 102519 | Earnshaw | Eric | M | CA | US | 16 | Hong Kong 100K 100km 2025 (23 hours) |
| 106784 | Easby | Conrad | M | British Columbia | CA | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124814 | Easler | Randy | M | ME | US | 1 | Vermont 100M 2025 (30 hours) |
| 107406 | Eastman | Chad | M | AB | CA | 8 | Lost Soul Ultra 100km 2025 (21 hours) |
| 122284 | Easton | Derek | M | WA | US | 2 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 127647 | Eastwood | Rob | M | CA | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 101987 | Ebener | Kenneth | M | SC | US | 128 | Hardrock 100M 2025 (48 hours) † |
| 101459 | Eber | Forrest | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 116689 | Ebertz | Joy | F | California | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 104361 | Ebrahem | Mina | M | EGY | EG | 4 | Twisted Branch 100km 2025 (20 hours) † |
| 127335 | Echard | Rose | F | Oregon | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 113678 | Echler | Tim | M | Ohio | US | 8 | Canal Corridor 100M 2025 (30 hours) † |
| 103871 | Eckardt | Scott | M | CA | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 117178 | Eckerlein | Christian | M | Aargau | CH | 4 | SwissPeaks 170km 2025 (58 hours) |
| 127859 | Eckert | Billy | M | Colorado | US | 1 | Run Rabbit Run 100M 2025 (36 hours) † |
| 125281 | Eckert | Jacob | M | AZ | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 105715 | Edamoto | Kanako | F | JPN | JP | 8 | Transjeju by UTMB 107km 2025 (25 hours) |
| 119475 | Eddy | Adam | M | California | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 108472 | Edelmann | Susanne | F | Hamburg | DE | 2 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 127292 | Edelwise | Qheiza | F | Texas | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 109181 | Edenteg | Johan | M | Uppland | SE | 2 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 126177 | Eder | Alan | M | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 123651 | Edge | Elliott | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 118510 | Edgecombe | Charles | M | British Columbia | CA | 4 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 115185 | Edgerton | Steve | M | AB | CA | 2 | Lost Soul Ultra 100km 2025 (21 hours) |
| 126045 | Edgley | Chris | M | Cambs | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 127976 | Edgmon | Mary | F | HI | US | 1 | HURT 100M 2025 (36 hours) |
| 113872 | Edøy | Odd | M | Sunndal | NO | 4 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 125853 | Edsall | Ryan | M | CO | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 123925 | Edwards | Challen | F | CO | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 118046 | Edwards | Hayden | M | Texas | US | 4 | Brazos Bend 100M 2024 (32 hours) |
| 115385 | Edwards | Jonathan | M | UT | US | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124463 | Edwards | Josh | M | New Jersey | US | 1 | Vermont 100M 2025 (30 hours) |
| 105883 | Edwards | K Mike | M | MD | US | 256 | Umstead 100M 2025 (30 hours) |
| 110091 | Edwards | Taylor | M | CA | US | 2 | Waldo 100km 2025 (18 hours) † |
| 119368 | Eerdmans | Kendra | F | ND | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 125295 | Egener | Evan | M | OR | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 125146 | Eggleston | Nathan | M | QLD | AU | 1 | Blackall 100km 2025 (18 hours) |
| 110608 | Ehland | Sean | M | CA | US | 16 | Rio Del Lago 100M 2025 (30 hours) |
| 112186 | Ehmann | Peter | M | NJ | US | 8 | Massanutten 100M 2025 (36 hours) † |
| 114501 | Ehrbaker | Toby | M | Maryland | US | 8 | Hennepin 100M 2025 (30 hours) † |
| 125472 | Ehret | Jeff | M | Florida | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 126312 | Eid | Troy | M | CO | US | 1 | Pinhoti 100M 2025 (32 hours) |
| 102917 | Eidukas | Saulius | M | OR | US | 8 | Hood Hundred 100M 2025 (34 hours) |
| 121369 | Eisen | Jon | M | CO | US | 2 | Transgrancanaria 125km 2025 (28 hours) |
| 119568 | Ekaterina | Kriukova | F | Krasnoyarsk region | RU | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 106282 | Elam | Jimmy | M | UT | US | 32 | Cascade Crest 100M 2025 (34 hours) |
| 101447 | Elam | Matt | M | CO | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 120440 | Elam | Patrick | M | Ohio | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 119595 | Elblinger | Balint | M | Pest | HU | 2 | Tahoe 202M 2025 (100 hours) |
| 127524 | Elbrecht | Pirjo | F | Tartu | EE | 1 | Chiangmai by UTMB Elephant 100km 2024 (22 hours) |
| 124024 | Elder | David | M | Perthshire | GB | 1 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 111982 | Eldridge | Nick | M | Oregon | US | 4 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 125994 | Elefteratos | Alexandra | F | VA | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 125011 | Eleuterio | Brandon | M | CO | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 124506 | Eley | Emma | F | Oxfordshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 117493 | Eley | Serena | F | Washington | US | 4 | Swiss Alps 100M 2025 (50 hours) |
| 124854 | Elick | Matt | M | Indiana | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 108561 | Elis | Brent | M | CA | US | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 126900 | Elizalde | Jay | M | TX | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 120761 | Elizalde | Rodrigo | M | Jalisco | MX | 2 | HOKA Bandera 100km 2025 (17 hours) |
| 126460 | Ellifson | DJ | M | WI | US | 1 | Hennepin 100M 2025 (30 hours) |
| 122657 | Elliot | Kyle | M | WA | US | 2 | Mountain Lakes 100M 2025 (30 hours) |
| 124267 | Elliott | Cean | M | OR | US | 1 | Waldo 100km 2025 (18 hours) |
| 104050 | Elliott | Kim | F | CA | US | 4 | Canal Corridor 100M 2025 (30 hours) † |
| 124051 | Elliott | Kirsty | F | New South Wales | AU | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 100442 | Elliott | Randy | M | NC | US | 4 | Superior 100M 2025 (38 hours) † |
| 104260 | Elliott | Robert | M | ID | US | 16 | IMTUF 100M 2025 (36 hours) † |
| 121635 | Elliott | Sarah | F | Lancashire | GB | 2 | Lakeland 100M 2025 (40 hours) |
| 108023 | Elliott | Tom | M | Texas | US | 16 | Dinosaur Valley 100M 2024 (35 hours) † |
| 121105 | Ellis | Carley | F | KS | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 111035 | Ellis | Jesse | M | AZ | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 105698 | Ellis | John | M | HKG | HK | 16 | Hong Kong 100K 100km 2025 (23 hours) |
| 115624 | Ellis | Karen | F | TX | US | 2 | Brazos Bend 100M 2024 (32 hours) |
| 118947 | Ellis | Morten | M | notts | GB | 2 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 107505 | Ellis | Shannon | F | MI | US | 8 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 112658 | Ellis | Steve | M | SC | US | 8 | Tahoe 202M 2025 (100 hours) † |
| 116752 | Ellison | Ross | M | CA | US | 2 | Moab 238M 2025 (108 hours) † |
| 125303 | Ellsworth | Ethan | M | Washington | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 126504 | Ellwanger | Joseph | M | Georgia | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 108194 | Ellwood | Graham | M | Wellington | NZ | 8 | Tarawera by UTMB 100M 2025 (36 hours) |
| 124245 | Elmer | Jessica | F | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 108873 | Elmore | Spencer | M | Georgia | US | 2 | C & O Canal 100M 2025 (30 hours) † |
| 125228 | Elmore | Tanner | M | MN | US | 1 | Superior 100M 2025 (38 hours) † |
| 105308 | Elsaesser | Ralf | M | CA | US | 64 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 121735 | Elsberry | Levi | M | Idaho | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 125311 | Elsigan | Dominik | M | Tirol | AT | 1 | Istria by UTMB 168km 2025 (46 hours) |
| 100789 | Elson | James | M | GBR | GB | 32 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 126781 | Emard | Bethlen | F | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 126345 | Emery | Josh | M | WA | US | 1 | Moab 238M 2025 (108 hours) † |
| 121865 | Eminger | Corey | M | NC | US | 2 | Umstead 100M 2025 (30 hours) |
| 104547 | Emis | Jon | M | CA | US | 128 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 126242 | Emmerich | Clinton | M | Colorado | US | 1 | Never Summer 100km 2025 (23 hours) |
| 124672 | EMMETT | BENJAMIN | M | New Jersey | US | 1 | Worlds End 100km 2025 (19 hours) |
| 113067 | Emmett | Tim | M | Missouri | US | 8 | HOKA Bandera 100km 2025 (17 hours) |
| 106401 | Enbom | Kevin | M | CA | US | 64 | Rio Del Lago 100M 2025 (30 hours) |
| 125818 | Enderlin | Matt | M | UT | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 117115 | Endl | Matyas | M | Budapest | HU | 4 | Salomon Ultra-Trail Hungary 112km 2025 (20 hours) |
| 115188 | Endo | Tsukasa | M | IBARAKI pref | JP | 4 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 116195 | Endsley | Chad | M | Ohio | US | 2 | Pinhoti 100M 2025 (32 hours) † |
| 106171 | Ene | Robert | M | GBR | GB | 8 | TOR130 - Tot Dret 130km 2025 (44 hours) |
| 110861 | Eng | Erik | M | Österåker | SE | 8 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 100811 | Engel | Llewelyn | F | DC | US | 32 | Yeti Virginia 100M 2025 (30 hours) † |
| 123847 | Engel | MJ | F | California | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 108113 | England | Jerry | M | WA | US | 16 | Pine to Palm 100M 2025 (34 hours) † |
| 102038 | England | Tiffany | F | NY | US | 128 | Buffalo Stampede 100km 2025 (23 hours) |
| 107658 | Englehart | Thomas | M | Ohio | US | 16 | Mohican 100M 2025 (32 hours) |
| 102836 | English | Garrett | M | UT | US | 128 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 126143 | English | James | M | NM | US | 1 | Bighorn 100M 2025 (35 hours) |
| 105505 | English | Nick | M | MT | US | 32 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 113223 | ENGLUND | TOM | M | Uppland | SE | 8 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 125096 | Ennis | Chad | M | KY | US | 1 | No Business 100M 2025 (34 hours) |
| 123972 | Ennis | David | M | KY | US | 1 | No Business 100M 2025 (34 hours) |
| 100324 | Ennis-King | Jonathan | M | AUS | AU | 64 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 127124 | Enomoto | Juri | F | Toyama | JP | 1 | Okushinano 100km 2025 (21 hours) |
| 109610 | Enrica | Gouthier | F | italy | IT | 8 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 118409 | Entrekin | Rachel | F | California | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 113328 | Entwistle | Michael | M | NSW | AU | 4 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 125739 | Eppen | Dyan | F | SD | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 123859 | Erard | Alexandre | M | Zurich | CH | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 118705 | Erbslöh | Torsten | M | NRW | DE | 2 | Swiss Alps 100M 2025 (50 hours) |
| 127684 | Erdenemunkh | Munkhjin | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 115799 | Erickson | Anne | F | UT | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 126471 | Erickson | Lars | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 109824 | Eriksson | Sigurd | M | Trondelag | NO | 16 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 119584 | Erla | Tobias | M | Upper Austria | AT | 2 | Mozart by UTMB 119km 2025 (23 hours) |
| 117393 | Ermak | Alexej | M | Nordrhein Westfalen | DE | 2 | Letecka Stovka 104km 2025 (21 hours) |
| 123966 | Erne | David | M | Zurich | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 121801 | Ernst | Shawn | M | IL | US | 2 | Kettle Moraine 100M 2025 (30 hours) |
| 124780 | Ervin | Brian | M | CO | US | 1 | Never Summer 100km 2025 (23 hours) |
| 125139 | Erwin | Patrick | M | North Carolina | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 114561 | Erxleben | Chris | M | Oregon | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 126622 | Escalante | Kimberley | F | Guatemala | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 126624 | Escobar | Glenda | F | TX | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 120997 | Escudie | Theo | M | New South Wales | AU | 2 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 118032 | Eshleman | Jeremy | M | Pennsylvania (PA) | US | 4 | Laurel Highlands 70.5M 2025 (20 hours) |
| 125894 | Eshmade | Dale | M | South Australia | AU | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 122826 | Eskridge | Kyle | M | New York | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 124532 | Espenel | Rob | M | CO | US | 1 | Cocodona 250M 2025 (125 hours) |
| 101046 | Espino | Albert | M | CA | US | 32 | Cuyamaca 100km 2025 (17 hours) † |
| 127377 | Espinosa | Florian | M | Loire | FR | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 119897 | Espinoza | Holly | F | MI | US | 2 | No Business 100M 2025 (34 hours) |
| 103126 | Esquivel | Alex | M | CA | US | 64 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 109009 | Estabrook | Eric | M | CA | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 122392 | Estes | Austin | M | TN | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 108359 | Estes | Wes | M | California | US | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124863 | Esteve | Jaume | M | Barcelona | ES | 1 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 110283 | Estrada | Emily | F | OR | US | 8 | Waldo 100km 2025 (18 hours) † |
| 127311 | ETCHEVERRY | FERNANDO | M | La Reina | CL | 1 | Vulcano Ultra Trail 100km 2024 (24 hours) |
| 122988 | ETIENNE | Ghylian | M | Plaines Wilhems | MU | 2 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 127249 | Eubanks | Madison | F | GA | US | 1 | Pinhoti 100M 2025 (32 hours) |
| 115483 | Eugster | Nick | M | MN | US | 2 | Zion 100km 2025 (19 hours) |
| 109915 | Eury | Mark | M | CO | US | 16 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 123257 | Evangelisti | Michele | M | Italia | IT | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 120198 | Evans | Ewan | M | Texas | US | 2 | Brazos Bend 100M 2024 (32 hours) |
| 113648 | Evans | Garret | M | CA | US | 8 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 120694 | Evans | Gregory | M | ON | CA | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 115528 | Evans | Julian | M | Cheshire | GB | 2 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 125927 | Evans | Liam | M | Greater London | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 107568 | Evans | Matt | M | Kent | GB | 2 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 127333 | Evans | Rebecca | F | Hampshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 112290 | Evans | Sarah | F | CA | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 124444 | Evans | Shaun | M | PA | US | 1 | Eastern States 100M 2025 (36 hours) |
| 116434 | Evans | Steve | M | NSW | AU | 4 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 126758 | evenden | matt | M | Warwickshire | GB | 1 | North Downs Way 100M 2025 (30 hours) |
| 109858 | Evenson | Scott | M | North Carolina | US | 8 | Umstead 100M 2025 (30 hours) |
| 111776 | Everhart | Brock | M | OH | US | 8 | Cocodona 250M 2025 (125 hours) |
| 108766 | Eversole | Sean | M | HI | US | 16 | HURT 100M 2025 (36 hours) † |
| 107206 | Everson | David | M | Colorado | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 104614 | Evison | Geoff | M | AUS | AU | 4 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 123698 | Ewers | Dustin | M | IN | US | 1 | Indiana 100M 2025 (30 hours) |
| 102558 | Ewing | Andrew | M | CA | US | 8 | HURT 100M 2025 (36 hours) |
| 100542 | Ewing | Brett | M | CA | US | 128 | Quicksilver 100km 2025 (17 hours) † |
| 125012 | Ewing | Jared | M | Ohio | US | 1 | Burning River 100M 2025 (30 hours) |
| 108819 | Fabian | Carlo | M | Ohio | US | 16 | Canal Corridor 100M 2025 (30 hours) † |
| 109127 | Fabianich Mcclay | John | M | Ohio | US | 16 | Georgia Death Race 74M 2025 (24 hours) † |
| 126130 | Fache | Maddie | F | British Columbia | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 125254 | Fack | Travis | M | WYOMING | US | 1 | Bighorn 100M 2025 (35 hours) |
| 122286 | Fader | Sean | M | CA | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 105904 | Fagan | Von | M | IL | US | 16 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 111849 | Fagundes | Anthony | M | CA | US | 4 | Georgia Death Race 74M 2025 (24 hours) |
| 118775 | Fagundes | Mark | M | TN | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 116814 | Fairfield | Dylan | M | Illinois | US | 2 | Tunnel Hill 100M 2024 (30 hours) |
| 108552 | Fairman | Jeffrey | M | Maryland | US | 8 | Grindstone by UTMB 100M 2025 (36 hours) |
| 125704 | Falcone | Aaron | M | Pennsylvania | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 112978 | Falk | Jonathan | M | MA | US | 4 | Vermont 100M 2025 (30 hours) |
| 115854 | Falkenberg | Eike | M | California | US | 4 | Sean O'Brien 100km 2025 (17 hours) † |
| 113588 | Falker | Todd | M | MA | US | 8 | Istria by UTMB 110km 2025 (24 hours) |
| 123714 | Falkingham | Mark | M | VIC | AU | 1 | Surf Coast Century 100km 2025 (17 hours) |
| 124673 | Falkner | Wyatt | N | WI | US | 1 | Bighorn 100M 2025 (35 hours) |
| 117150 | Fallon | Collin | M | TX | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 100881 | Fallon | Victor | M | CO | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 105143 | Fallows | Jonathan | M | GBR | GB | 4 | Gran Trail Courmayeur 100km 2025 (28 hours) |
| 117601 | Falzon | Jason | M | Texas | US | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 126482 | Fan | HuiXing | M | BeiJing | CN | 1 | Nike ACG Ultra-Trail Chongli 168km 2025 (48 hours) |
| 124402 | Fan | Shumin | F | Washington | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 126255 | Fanelli | Christopher | M | DC | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 125471 | FANG | XUANCHANG | M | Beijing | CN | 1 | Mount Yun by UTMB - UMY 159.6km 2025 (48 hours) |
| 126368 | FANG | YUMIN | M | New Taipei | TW | 1 | Formosa Trail 104km 2024 (28 hours) |
| 106793 | Fannin | Tyler | M | Utah | US | 64 | Wasatch Front 100M 2025 (36 hours) † |
| 119320 | Fano | Cyrille | M | Drôme | FR | 1 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 126867 | Farfsing | Joseph | M | OH | US | 1 | Burning River 100M 2025 (30 hours) |
| 119404 | Farinella | Vincent | M | Missouri | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 119146 | Farlee | Todd | M | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 114973 | Farmer | Carlita | F | NC | US | 4 | Pinhoti 100M 2025 (32 hours) † |
| 108317 | Farmers | Andrew | M | Sabah | MY | 8 | Scott TMBT 109km 2025 (30 hours) |
| 118152 | Farmiga | Victor | M | Colorado | US | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 119566 | Farno | Christopher | M | NC | US | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 113753 | Farquhar | Carey | F | WA | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) |
| 124807 | Farr | Christopher | M | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 126259 | Farrant | Charlotte | F | Alberta | CA | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 117109 | farrell | gerry | M | Cork | IE | 2 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 127105 | Farrell | John | M | Arizona | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 121821 | Farrell | Joshua | M | NY | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 120051 | Farrell | Joshua | M | IN | US | 2 | Indiana 100M 2025 (30 hours) |
| 112240 | Farrell | Kristii | N | North Carolina | US | 4 | Yeti Virginia 100M 2025 (30 hours) † |
| 125678 | FARRELL | ROBERT | M | ON | CA | 1 | Black Canyon 100km 2025 (17 hours) † |
| 114617 | Farrell | Shelby | F | CT | US | 4 | Cocodona 250M 2025 (125 hours) |
| 120420 | Farrell | Suzanne | F | CA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 123520 | Farris | Galen | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 112803 | Farris | Josh | M | wa | US | 4 | Bigfoot 206M 2025 (100 hours) † |
| 100244 | Farrow | Clare | F | CO | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 101244 | Farvard | Rod | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 116187 | Faryadi | Jonathan | M | NC | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 117911 | Fasl | Joseph | M | New York | US | 4 | Twisted Branch 100km 2025 (20 hours) † |
| 126210 | Fasolino | Davide | M | Milano | IT | 1 | Tuscany Crossing 103km 2025 (21 hours) |
| 111623 | Fatigante | Michael | M | PA | US | 8 | Mohican 100M 2025 (32 hours) |
| 111050 | Fatti | Kali | F | New York | US | 4 | Bigfoot 206M 2025 (100 hours) † |
| 100635 | Faught | David | M | ID | US | 128 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 106795 | Faul | Justin | M | 32 | Cocodona 250M 2025 (125 hours) | ||
| 124383 | Faure | Ashley | F | OR | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 126005 | Faust | Noah | M | VA | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 126941 | Fauth | Adrien | M | Ile de France | FR | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 113864 | Favro | Chris | M | GA | US | 8 | Georgia Death Race 74M 2025 (24 hours) † |
| 124920 | Fawley | Keegan | M | Colorado | US | 1 | Moab 238M 2025 (108 hours) † |
| 112020 | Fazio | Danielle | F | CA | US | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 116231 | Fearnall | Adam | M | New Brunswick | CA | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 108586 | Febbraro | Amber | F | CO | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 119373 | Fecteau | David | M | Pennsylvania | US | 2 | Cocodona 250M 2025 (125 hours) |
| 106796 | Fedele | Domenico | M | Italy | IT | 16 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 117549 | Feeny | James | M | MI | US | 4 | Canal Corridor 100M 2025 (30 hours) |
| 103041 | Fegyveresi | John | M | AZ | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 112869 | Fehr | Ty | M | Alberta | CA | 8 | Crazy Mountain 100M 2025 (36 hours) † |
| 105192 | Feinhaus | Dima | M | MA | US | 16 | Bighorn 100M 2025 (35 hours) |
| 123807 | Fekete | Lucci | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 122997 | Felber | Stephanie | F | IL | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 100897 | Feldman | Neil | M | MA | US | 512 | HOKA Bandera 100km 2025 (17 hours) |
| 123274 | Fellin | Federico | M | TN | IT | 2 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 111494 | Feng | Wei | M | Singapore | SG | 8 | Nike ACG Ultra-Trail Chongli 168km 2025 (48 hours) |
| 124343 | Fenimore | Landon | M | VT | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 116377 | Fenn | Samuel | M | London | GB | 4 | Autumn 100M 2025 (28 hours) |
| 120203 | Fenske | Eric | M | Maryland | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 124464 | Fensler | Marc | M | Indiana | US | 1 | Indiana 100M 2025 (30 hours) |
| 100208 | Fensterl | Jaime | F | OH | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 108025 | Fenton | Owen | M | Cork | IE | 8 | Sulphur Springs 100M 2025 (30 hours) |
| 125272 | Fenyves | Gabor | M | Ontario | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 104789 | Ferbitz | Lars | M | CHE | CH | 16 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 118589 | Ferdinandson | Adam | M | CO | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 109662 | Fergen | Jochen | M | NRW | DE | 4 | Mozart by UTMB 119km 2025 (23 hours) |
| 118022 | Fergot | Gregg | M | CA | US | 4 | Bigfoot 206M 2025 (100 hours) † |
| 114037 | Fergot | Sarah | F | CA | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 126711 | Ferguson | Alvah | M | TN | US | 1 | Hellbender 100M 2025 (40 hours) † |
| 124098 | Ferguson | Callum | M | Scotland | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 107668 | Ferguson | Joshua | M | Maryland | US | 16 | Hellbender 100M 2025 (40 hours) † |
| 122370 | Ferguson | Parker | M | California | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 113659 | Ferguson | Ross | M | Queensland | AU | 4 | Guzzler Ultra 100km 2025 (24 hours) |
| 118438 | Ferguson | Stan | M | AR | US | 4 | Grindstone by UTMB 100km 2025 (18 hours) |
| 110933 | Fernandez | Cristian | M | San Jose | CR | 4 | Istria by UTMB 168km 2025 (46 hours) |
| 124929 | Fernandez | Kianté | M | California | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 115289 | Ferrante | Marco | M | BZ | IT | 4 | Morenic Trail 119km 2025 (22 hours) |
| 106800 | Ferrara | Nicholas | M | PA | US | 256 | Bighorn 100M 2025 (35 hours) |
| 114273 | Ferrari | Francesco | M | Lombardia | IT | 4 | Swiss Alps 100M 2025 (50 hours) |
| 120349 | Ferre | Brice | M | BC | CA | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 100711 | Ferree | Eric | M | PA | US | 16 | Eastern States 100M 2025 (36 hours) |
| 113603 | Ferreira | Hugo | M | Lisboa | PT | 2 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 109845 | FERRELL | THOMAS | M | OR | US | 8 | Pine to Palm 100M 2025 (34 hours) † |
| 121115 | Ferrena | Juli | F | FL | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 123926 | Ferrero | Juan Ricardo | M | Córdoba | AR | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 114191 | Ferret | Kevin | M | California | US | 8 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 105155 | Ferretto | Alberto | M | ITA | IT | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 107730 | Ferrier | Nathan | M | MI | US | 16 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 119594 | ferrio | matteo | M | Italia | IT | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 105482 | Fersch | Sascha | M | DEU | DE | 2 | Zugspitz 100M 2025 (48 hours) |
| 125688 | Fesler | Darc | F | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 111215 | Fetters | Brad | M | FL | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 104422 | Fetting | Mark | M | PA | US | 8 | Grindstone by UTMB 100M 2025 (36 hours) |
| 104139 | Feustel | Troy | M | IA | US | 16 | Superior 100M 2025 (38 hours) † |
| 101833 | Fiandaca | Benjamin | M | NH | US | 1 | Western States 100M 2025 (30 hours) † |
| 105038 | Fiandeiro | Louis | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 104510 | Fiandeiro | Stefan | M | CA | US | 64 | Tunnel Hill 100M 2024 (30 hours) † |
| 118206 | Fidalgo | Tino | M | MA | US | 4 | Vermont 100M 2025 (30 hours) |
| 117867 | Fiege-Kollmann | Kyle | M | Washington | US | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 124505 | Field | Adam | M | Arizona | US | 1 | Black Canyon 100km 2025 (17 hours) |
| 108434 | field | troy | M | Auckland | NZ | 4 | Taupo 100km 2025 (17 hours) |
| 125451 | Fielding | Brady | M | Illinois | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 120472 | Fields | Ben | M | Colorado | US | 2 | Waldo 100km 2025 (18 hours) † |
| 121059 | Fierros Miranda | Antonio Rafael | M | SIN | MX | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 104374 | Fiessinger | Christophe | M | WA | US | 32 | Cascade Crest 100M 2025 (34 hours) |
| 125830 | Fiessinger | Quentin | M | Washington | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 127347 | Figar | Andres | M | Madrid | ES | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 105490 | Figgins | Troy | M | CA | US | 256 | Hennepin 100M 2025 (30 hours) † |
| 113903 | Figone Crouch | Lisa | F | CA | US | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 126672 | Figueroa | Alexander | M | GA | US | 1 | Saddles 100M 2025 (34 hours) † |
| 125144 | Figueroa | Mario | M | Guatemala | GT | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 108480 | File | Balázs | M | Pest | HU | 8 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 124623 | Filipkiewicz | Tomasz | N | Middlesex | GB | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 125923 | FILLEAU | Clement | M | Berne | CH | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 123941 | Filoche | Fabien | M | France | FR | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 114280 | Finegan | Oran | M | Dublin | IE | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 100243 | Finger | Joshua | M | PA | US | 32 | Vermont 100M 2025 (30 hours) |
| 105361 | Finkbeiner | Christian | M | NV | US | 16 | Pine to Palm 100M 2025 (34 hours) † |
| 127064 | Finlay | Liam | M | QLD | AU | 1 | Blackall 100km 2025 (18 hours) |
| 109431 | Finn | Charles | M | WA | US | 16 | Leona Divide 100km 2025 (17 hours) |
| 126515 | Finnegan | Emily | F | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 108462 | Finocchio | Tim | M | MA | US | 16 | Hardrock 100M 2025 (48 hours) † |
| 118795 | Fioretti | Mirko | M | Italy | US | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 104165 | Fioroni | Gina | F | CO | US | 8 | Bear, The 100M 2025 (36 hours) † |
| 125771 | Fiorucci | Richard | M | VA | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 126959 | Fischer | Jacob | M | MA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 109110 | Fischer | Jody | M | QLD | AU | 8 | Blackall 100km 2025 (18 hours) |
| 101223 | Fischer | Katherine | F | CA | US | 16 | Moab 238M 2025 (108 hours) |
| 119106 | Fischer | Lauren | N | WA | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 124257 | Fisher | Anna | F | UT | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 116677 | Fisher | Charlotte | F | Other | GB | 4 | Mallorca by UTMB: Serra de Tramuntana (SDT) 135km 2025 (30 hours) |
| 125763 | Fisher | Connor | M | NV | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 117998 | Fisher | Jacob | M | CO | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 118354 | Fisher | Joanne | F | FL | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 123803 | Fisher | Jonathan | M | AZ | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 124570 | Fisher | Keri | M | British Columbia | CA | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 117390 | Fisher | Nathan | M | California | US | 4 | Angeles Crest 100M 2025 (36 hours) † |
| 116058 | Fisk | Emily | F | PA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) |
| 120014 | Fiske | Zachary | M | New York | US | 2 | Javelina Jundred 100M 2025 (30 hours) |
| 103428 | Fitch | Kelly | F | CA | US | 16 | Beaverhead 100km 2025 (20 hours) |
| 125176 | Fitton | Ben | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 100321 | Fitz | John | M | MD | US | 64 | Indiana 100M 2025 (30 hours) |
| 111893 | Fitzgerald | Michael | M | PA | US | 2 | Eastern States 100M 2025 (36 hours) |
| 127385 | Fitzgerald | Tom | M | ACT | AU | 1 | Blackall 100km 2025 (18 hours) |
| 126417 | Fitzpatrick | Chris | M | MA | US | 1 | Vermont 100M 2025 (30 hours) |
| 126365 | Fitzsimmons | Ben | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 123240 | Fitzsimmons | Mike | M | NV | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 112897 | Fladhammer | James | M | Wisconsin | US | 8 | Tahoe 202M 2025 (100 hours) † |
| 114940 | Flagler | Grant | M | Alberta | CA | 4 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 113457 | Flaidar | Alin | M | WA | US | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 100378 | Flake | Christoph | M | DEU | DE | 32 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 117823 | Flament | Arnaud | M | SA | AU | 4 | Blackall 100km 2025 (18 hours) |
| 107553 | Flanary | James | M | CO | US | 16 | Black Canyon 100km 2025 (17 hours) |
| 100532 | Flannery | Kevin | M | CO | US | 8 | Run Rabbit Run 100M 2025 (36 hours) |
| 105660 | Flannery | Moira | F | UT | US | 64 | Wasatch Front 100M 2025 (36 hours) † |
| 109073 | Flatlip | Scott | M | MT | US | 1 | Western States 100M 2025 (30 hours) † |
| 113282 | Flatman | Danielle | F | Auckland | NZ | 8 | Taupo 100km 2025 (17 hours) |
| 115970 | Fleeger | Kevin | M | FL | US | 4 | Cocodona 250M 2025 (125 hours) |
| 127096 | Fleiry | Justin | N | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 112047 | Fleisher | Aaron | M | CA | US | 8 | Cocodona 250M 2025 (125 hours) |
| 125225 | Fleming | Ben | M | Colorado | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 112701 | Fleming | Margot | F | CA | US | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 127955 | Fleming | Seth | M | WA | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 126053 | Fleming | Stan | M | TN | US | 1 | Cruel Jewel 106M 2025 (48 hours) |
| 127566 | Fleming | William | M | GA | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 121782 | Fletcher | Ben | M | California | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 127446 | Fletcher | Branden | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 126930 | Fletcher | Jonathan | M | Texas | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 109063 | Fletcher | Matt | M | UT | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 125495 | Fletcher | Nick | M | WA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 121539 | Fletcher | Richard | M | ACT | AU | 2 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 100638 | Fletes | Sinuhe | M | MEX | MX | 128 | Tunnel Hill 100M 2024 (30 hours) † |
| 125746 | Flett | Renee | F | QLD | AU | 1 | Guzzler Ultra 100km 2025 (24 hours) |
| 124637 | Fleugel | Chris | M | BC | CA | 1 | Fat Dog 120M 2025 (48 hours) † |
| 102403 | Flinders | Mary | F | WA | US | 64 | Black Canyon 100km 2025 (17 hours) † |
| 109593 | Flink | Brian | M | CO | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 114004 | Flinn | Emily | F | Pa | US | 4 | Cocodona 250M 2025 (125 hours) |
| 120251 | Flint | Ryan | M | Ontario | CA | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 100206 | Flippin | Mitchell | M | CO | US | 8 | Cuyamaca 100km 2025 (17 hours) |
| 124380 | Flores | Elizabeth | F | Pennsylvania | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 122123 | Flores | Juan | M | California | US | 2 | Tahoe 202M 2025 (100 hours) |
| 110542 | Flores | Melissa | F | Ca | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 110728 | Florian | Sergio | M | Hawaii | US | 8 | Canyons by UTMB 100M 2025 (35 hours) |
| 125338 | Florimonte | Jason | M | FL | US | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 108597 | Flory | Ariela | F | Kentucky | US | 8 | No Business 100M 2025 (34 hours) |
| 108592 | FLORY | Daniel | M | KY | US | 8 | No Business 100M 2025 (34 hours) |
| 102805 | Flowerday | Crispin | M | CA | US | 4 | Waldo 100km 2025 (18 hours) † |
| 119698 | Flowerdew | Gregory | M | Lothian | GB | 2 | Swiss Alps 100km 2025 (22 hours) |
| 126662 | Flowers | Andrew | M | Texas | US | 1 | Cruel Jewel 106M 2025 (48 hours) † |
| 121338 | Floyd | Ian | M | CO | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 109450 | Floyd | Richard | M | NC | US | 8 | Hellgate 100km 2024 (17 hours) |
| 126719 | Flygare | Pekka | M | FINLAND | FI | 1 | Nuts Ylläs Pallas 100km 2025 (22 hours) |
| 116359 | Flynn | Aaron | M | CA | US | 4 | San Diego 100M 2025 (32 hours) † |
| 116419 | Flynn | Bracken | M | CA | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 111734 | Flynn | David | M | GA | US | 8 | Long Haul 100M 2025 (30 hours) |
| 109270 | Foessel | Benjamin | M | Queensland | AU | 16 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 119010 | Fogelmark | Johan | M | Stockholm | SE | 4 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 121424 | Fogerty | Patrick | M | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 108791 | Foglia | Ivan | M | Parma | IT | 16 | Abbots Way 100km 2025 (22 hours) |
| 124042 | Foilleret | Killian | M | Normandie | FR | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 126391 | Foley | Kirstin | F | Taranaki | NZ | 1 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 126653 | FOLEY | NICHOLAS | N | NC | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 108016 | Foley | Tom | M | Co.Kerry | IE | 4 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 106230 | Folkert | Darrel | M | CA | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 113581 | Follmar | Amanda | F | California | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 125677 | Follonier | Gabriel | M | Vaud | CH | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124527 | Foltz | Hunter | M | Ohio | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 123082 | Foncubierta | Ezequiel | N | Cádiz | ES | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 109015 | Fones | Madeline | F | CO | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 125831 | Fontaine | Julien | M | Québec | CA | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 118467 | Fontenay | Clément | M | Puy de Dôme | FR | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 122545 | FONTENEAU | Teddy | M | 92100 | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 122343 | Foor | Tyler | M | NC | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 126577 | Foorthuis | Lodewijck | M | Zuid-Holland | NL | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 118988 | Forand | Marc-Antoine | M | QC | CA | 2 | Quebec Mega Trail 135km 2025 (32 hours) |
| 122625 | Forbes | Christi | F | WI | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 102389 | Forbes | Timothy | M | TN | US | 32 | Rim to River 100M 2025 (32 hours) † |
| 120412 | Forbes | Travis | M | Washington | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 104995 | Force | Daniel | M | OR | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 116777 | Forcier | Rich | M | Alberta | CA | 2 | Lost Soul Ultra 100km 2025 (21 hours) † |
| 125479 | Ford | Deedee | F | Idaho | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 101221 | Ford | Elisabeth | F | GA | US | 16 | Long Haul 100M 2025 (30 hours) † |
| 109252 | Ford | Isaiah | M | AZ | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 108749 | Ford | Russell | M | TX | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 117226 | Ford | Tyler | M | Virginia | US | 1 | Western States 100M 2025 (30 hours) † |
| 100860 | Foreman | Gary | M | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 122776 | Foreste | Nick | M | Georgia | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123821 | Forester | Nathan | M | Saskatchewan | CA | 1 | Lost Soul Ultra 100km 2025 (21 hours) |
| 111103 | Forman | Jared | M | CA | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 119102 | Fornasier | Fausto | M | Italy | IT | 2 | Istria by UTMB 168km 2025 (46 hours) |
| 126477 | Fornataro | rob | N | NY | US | 1 | Black Canyon 100km 2025 (17 hours) |
| 103586 | Forneris | Piercarlo | M | ITA | IT | 8 | Morenic Trail 119km 2025 (22 hours) |
| 125126 | Forrest | Catriona | F | Edinburgh | GB | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 123573 | Forsman | Tia | F | CA | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 121301 | Forsyth | David | M | OH | US | 2 | Canal Corridor 100M 2025 (30 hours) † |
| 112468 | Fortenberry | Ryan | M | KY | US | 8 | No Business 100M 2025 (34 hours) |
| 120374 | Fortier | David | M | Québec | CA | 2 | Grindstone by UTMB 100M 2025 (36 hours) |
| 120141 | fortier | joanna | F | Vermont | US | 2 | Vermont 100km 2025 (17 hours) |
| 123126 | Fortier | Zoe | F | Maryland | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 114243 | Fortin | Charles | M | Quebec | CA | 8 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 124427 | Fortunato | Paul | M | IL | US | 1 | No Business 100M 2025 (34 hours) |
| 125976 | Foss | David | M | RI | US | 1 | Vermont 100km 2025 (17 hours) |
| 125353 | Fossati | Fulvio Lorenzo | N | Italy | IT | 1 | Gran Trail Courmayeur 100km 2025 (28 hours) |
| 127140 | Foster | Andrew | M | Lancashire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 124439 | Foster | Clayton | M | Wisconsin | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 121116 | Foster | Elizabeth | F | IL | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 124235 | Foster | Jessica | F | TN | US | 1 | Hellbender 100M 2025 (40 hours) † |
| 106011 | Foster | Stephen | M | MO | US | 2 | Mamba 100M 2024 (34 hours) † |
| 123878 | Foster | Stuart | M | British Columbia | CA | 1 | Fat Dog 120M 2025 (48 hours) † |
| 107987 | Fotheringham | Alannah | F | ON | CA | 16 | Hood Hundred 100M 2025 (34 hours) |
| 125365 | Foucher | Marvin | M | 74 | FR | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 123964 | Fougeres | Jean-David | M | Haute normandie | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 103597 | Fouille | Nicolas | M | FRA | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 110875 | Fouillot | Nicolas | U | Rhône alpes | FR | 8 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 126394 | Foulger | Jonny | M | Select | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 111245 | FOURGEAUD | ALAIN | U | FRANCE | FR | 4 | Restonica Trail by UTMB - Ultra-Trail® di Corsica 110km 2025 (36 hours) |
| 120211 | Fowkes | Molly | F | Oregon | US | 2 | Vermont 100M 2025 (30 hours) |
| 121174 | Fowlds | Myles | M | NSW | AU | 2 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 123795 | Fowler | Paddy | M | Edinburgh | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 103114 | Fowler | Phillip | M | AUS | AU | 1 | Western States 100M 2025 (30 hours) † |
| 123700 | Fowler | Ryan | M | Ohio | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 112528 | Fowlkes | Jonathan | M | Mt | US | 8 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 123622 | Fox | Bryan | M | Ontario | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 124761 | Fox | DJ | M | CO | US | 1 | Cocodona 250M 2025 (125 hours) |
| 120777 | Fox | Jeff | M | PA | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 107709 | Fox | Nelle | F | VA | US | 8 | Pinhoti 100M 2025 (32 hours) † |
| 123644 | Fox | Nicholas | M | MD | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 114135 | Fox | Stacy | M | CA | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 103513 | Fox | Wallly | M | OR | US | 32 | Waldo 100km 2025 (18 hours) † |
| 120559 | Foxcroft | Mike | M | ON | CA | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 116170 | Fragoso | Jill | F | LA | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 124158 | Fragoso | Lucio | M | LA | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 114012 | Franchi | Trevor | M | CA | US | 8 | Leona Divide 100km 2025 (17 hours) |
| 117358 | Francis | Helen | F | Ontario | CA | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 124775 | Francon | Olivier | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 124216 | Frank | Benjamin | M | NY | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 111658 | Frank | Isaac | M | CO | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 119217 | Frank | Jordan | M | ID | US | 2 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 122078 | Frank | William | M | Ca | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 102801 | Frankel | Joshua | M | NY | US | 16 | Twisted Branch 100km 2025 (20 hours) † |
| 120174 | Franklin | Justin | M | OK | US | 2 | Mohican 100M 2025 (32 hours) |
| 111477 | Franklyn | Ramsey | M | Ontario | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 125114 | Franks | Erik | M | CA | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 119518 | Franssens | Nills | M | CA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 111503 | Frantzen | Marc | M | NRW | DE | 8 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 127402 | Franzan | Matteo | M | VI | IT | 1 | Tuscany Crossing 103km 2025 (21 hours) |
| 118783 | Franzetti | Jacopo | M | Lombardia | IT | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 119898 | FREDEFON | SEVERINE | F | - Sélectionnez votre état --- | FR | 2 | Mallorca by UTMB: Serra de Tramuntana (SDT) 135km 2025 (30 hours) |
| 124688 | Fredell | Dennis | M | WA | US | 1 | Cascade Crest 100M 2025 (34 hours) |
| 123672 | Frederic | Diane | F | NV | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 116228 | Frederick | Kaylee | F | Pennsylvania | US | 4 | Laurel Highlands 70.5M 2025 (20 hours) |
| 110077 | Frederiksen | Claus Ellgaard | M | Nordjylland | DK | 16 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 105122 | Freeman | Gordon | M | OR | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 120688 | Freeman | Renee | F | Montana | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 121121 | Frei | Becca | F | UT | US | 1 | Western States 100M 2025 (30 hours) † |
| 127476 | Freimuth | Julia | F | CA | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 102520 | Freitag | Michael | M | DEU | DE | 64 | Canyons by UTMB 100M 2025 (35 hours) |
| 125283 | Freitas | Kristin | F | WA | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 123676 | French | Jackson | M | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 104526 | French-Owen | Calvin | M | CA | US | 32 | Miwok 100km 2025 (15:30:59 hours) |
| 117414 | Frentzel | Jonathan | M | Delaware | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123623 | Freval | Donovan | M | QC | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 127869 | Frewin | Josh | M | AZ | US | 1 | Cocodona 250M 2025 (125 hours) |
| 111358 | Frey | Jonathan | M | NC | US | 2 | Hellbender 100M 2025 (40 hours) † |
| 118588 | Frey | Joshua | M | CA | US | 4 | Zion 100M 2025 (36 hours) |
| 104893 | Frick | Tim | M | TX | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 126606 | Fricke | Thomas | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 115777 | Fridrichova | Jana | F | MD | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 120204 | friedly | seth | M | Colorado | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 122822 | Friedman | Lee | M | TN | US | 2 | Pinhoti 100M 2025 (32 hours) |
| 125385 | Friedrich | Matthias | M | Germany | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 125135 | Friesen | Marvin | M | British Columbia | US | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 109114 | Frigeri | Mattia | M | Parma | IT | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 112966 | Frigon | Samuel | M | Québec | CA | 8 | Quebec Mega Trail 135km 2025 (32 hours) |
| 125377 | Frisby | Nicole | F | Essex | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 104425 | Fritsch | Jackie | F | MD | US | 16 | Hardrock 100M 2025 (48 hours) |
| 102507 | Fritz | Aaron | M | TX | US | 32 | Kettle Moraine 100M 2025 (30 hours) † |
| 124964 | FROEMMING | JUSTIN | M | MN | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 122457 | froissard | timothee | M | Nord | FR | 2 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 107326 | Fronczek | Eric | M | OH | US | 8 | Mohican 100M 2025 (32 hours) |
| 114130 | Fronteras | Karen | F | Devon | GB | 4 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 126984 | Frost | Harriet | F | Cornwall | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 121844 | Frost | Jared | M | NV | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 123780 | Frost | Joseph | M | MI | US | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 120926 | Frost-Tift | Joel | M | CA | US | 2 | Bighorn 100M 2025 (35 hours) |
| 117874 | Fruehauf | Urs | M | Hessen | DE | 4 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 125404 | Fu | Jia | F | GUANGDONG | CN | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 126859 | Fuchs | Benjamin | M | Hessen | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 106808 | Fuchs | Trevor | M | 2 | IMTUF 100M 2025 (36 hours) † | ||
| 125896 | Fuentes Montero | María isabel | F | 30 | ES | 1 | Penyagolosa 106km 2025 (26 hours) |
| 109116 | Fuentes Rivera | Hector | M | San Salvador | SV | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 117170 | Fugere | Trevin | M | TX | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 127775 | Fuglevik | Walther | M | QLD | AU | 1 | Blackall 100km 2025 (18 hours) |
| 117342 | Fujimura | Satomi | F | Hawaii | US | 2 | HURT 100M 2025 (36 hours) † |
| 101098 | Fujioka | Masazumi | M | WA | US | 64 | Hardrock 100M 2025 (48 hours) † |
| 125963 | Fujishima | Yoshiho | M | Saitama | JP | 1 | Mt Fuji 100M 2025 (46 hours) |
| 108419 | Fujishiro | Kiyo | M | Kyoto | JP | 16 | Transgrancanaria 125km 2025 (28 hours) |
| 100409 | Fujita | Shinichiro | M | JPN | JP | 16 | Okushinano 100km 2025 (21 hours) |
| 115205 | FUJIWARA | TAKESHI | M | Chiba | JP | 4 | OSJ Ontake 100km 2025 (20 hours) |
| 115584 | fukui | yoshikazu | M | tokyo | JP | 4 | SkyView Ultra Trail 140km 2025 (34 hours) |
| 110571 | Fuller | Josh | M | Wyoming | US | 4 | Hardrock 100M 2025 (48 hours) † |
| 126707 | Fuller | Mark | M | London | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 109008 | Fuller | Michael | M | Minnesota | US | 8 | Superior 100M 2025 (38 hours) † |
| 107214 | Fullerton | Andrew | M | OK | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 100864 | Fulmer | Kyle | M | CO | US | 1 | Hardrock 100M 2025 (48 hours) † |
| 107635 | Fulton | Alan | M | ms | US | 16 | Arkansas Traveler 100M 2025 (30 hours) |
| 100706 | Fumero | Luigi | M | GBR | GB | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127241 | FUMERY | PIERRE-ANTOINE | M | Nord-Pas-de-Calais | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 101007 | Fung | Leo | M | TX | US | 8 | HOKA Bandera 100km 2025 (17 hours) |
| 119148 | Funk | Jonathan | M | CA | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127104 | Funnell | Jamie | M | Essex | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 123095 | Furillo | Andrew | M | California | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 127838 | Furman | Blake | M | Pennsylvania | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 126814 | Furtado Sousa | Gabriela | F | Maranhão | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 103648 | Furukawa | Hideaki | M | Osaka-fu | JP | 8 | OSJ Ontake 100km 2025 (20 hours) |
| 125248 | Furusawa | Kensuke | M | Tokyo | JP | 1 | Okushinano 100km 2025 (21 hours) |
| 119448 | Fuss | Tony | M | Thueringen | DE | 2 | Zugspitz 100M 2025 (48 hours) |
| 105629 | Futterer | Chris | M | CA | US | 64 | Cuyamaca 100km 2025 (17 hours) † |
| 111919 | Fye | Trevor | M | Pennsylvania | US | 4 | Eastern States 100M 2025 (36 hours) |
| 116137 | Fyfe | Alex | M | CA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 119272 | Gaastra | Joshua | M | Oregon | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 127102 | Gabalita | Tia | F | OR | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 104954 | Gabbe | Charles | M | CA | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 125387 | Gaborit | Hugo | M | Rhône | FR | 1 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 121263 | Gabrieau | Maxime | M | Greater London | GB | 2 | Mt Fuji 100M 2025 (46 hours) |
| 124679 | Gabrielli | William | M | Armagh | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 118831 | Gaerlan | Justin | M | CA | US | 4 | Cruel Jewel 106M 2025 (48 hours) † |
| 108589 | Gaffney | Erica | F | PA | US | 16 | Eastern States 100M 2025 (36 hours) |
| 119126 | Gage | Sarah | F | New Mexico | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 116706 | Gagel | Christian | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 125055 | Gagliano | Jordan | M | Missouri | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 101759 | Gagliardi | Michael | M | PA | US | 64 | Javelina Jundred 100M 2025 (30 hours) † |
| 125276 | Gagne | Andre | M | Quebec | CA | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 109561 | Gagne | Eric | M | Quebec | CA | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 105291 | Gagnon | Joseph | M | NY | US | 64 | Black Canyon 100km 2025 (17 hours) † |
| 113948 | Gagnon | Nanette Rosie | F | VA | US | 4 | Cruel Jewel 106M 2025 (48 hours) † |
| 125419 | Gahan | Luke | M | Wales | GB | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 126080 | Gaibler | Drew | M | VA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 109968 | Gaide | Matt | M | CA | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 119344 | Gailiunas | Darius | M | Vilnius | LT | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 110913 | Gaillard | Benoit | M | QC | CA | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 114694 | Gainer | Eric | M | NC | US | 2 | Umstead 100M 2025 (30 hours) |
| 104571 | Gaiser | Scott | M | MT | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 104901 | Gaitten | Joseph | M | OH | US | 64 | Indiana 100M 2025 (30 hours) |
| 125508 | Galan Martin | David | M | Madrid | ES | 1 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 125208 | Galanti | Horacio | M | Alberta | CA | 1 | Puerto Vallarta by UTMB 147km 2024 (35 hours) |
| 104601 | Gale | Colton | M | OR | US | 128 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 109230 | Gale | Travis | M | KZN | ZA | 4 | SkyRun 100km 2024 (28 hours) |
| 112842 | Galioni | Orion | M | Ca | US | 4 | Laurel Highlands 70.5M 2025 (20 hours) |
| 111938 | Gallagher | Leah | F | NY | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 107325 | Gallagher | Robert | M | Ma | US | 16 | Yeti Virginia 100M 2025 (30 hours) † |
| 100912 | Gallant | Marc | M | NB | CA | 64 | Black Canyon 100km 2025 (17 hours) † |
| 113355 | Gallart | Enric | M | Lleida | ES | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 112939 | Galle | Matthew | M | CO | US | 8 | Bighorn 100M 2025 (35 hours) |
| 125670 | galli | andrea | M | SO | US | 1 | Morenic Trail 119km 2025 (22 hours) |
| 122454 | Galligan | Michael | M | Minnesota | US | 2 | Surf Coast Century 100km 2025 (17 hours) |
| 122614 | Galligani | Jake | M | CA | US | 2 | Tahoe 202M 2025 (100 hours) † |
| 119811 | Gallo | Francesco Claudio | M | Italy | IT | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125458 | Gallo | Matias | M | New Jersey | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 105689 | Galloway | Carson | M | IA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 103956 | Galloway | David | M | NC | US | 1 | Western States 100M 2025 (30 hours) † |
| 121631 | Galloway | Jeff | M | Utah | US | 2 | Zion 100km 2025 (19 hours) |
| 124754 | Galloway | Stephen | M | MA | US | 1 | Vermont 100M 2025 (30 hours) |
| 113829 | Galvez | David | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 120143 | Galway | Shannon | M | TX | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 123183 | Gamberale | Carlo | M | Lazio | IT | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 109304 | Gamble | Brian | M | TX | US | 8 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 116719 | Gamble | Geoff | M | Ontario | CA | 4 | Black Canyon 100km 2025 (17 hours) † |
| 115421 | Gamito baus | Jordi | M | Spain | ES | 2 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 107989 | Gampp | Michael | M | OH | US | 8 | Hellgate 100km 2024 (17 hours) |
| 124812 | Ganapathi | Ashwini | F | Karnataka | IN | 1 | Scott TMBT 109km 2025 (30 hours) |
| 108423 | Gandhi | Aum | M | CA | US | 16 | San Diego 100M 2025 (32 hours) † |
| 112333 | Gandhi | Karthikeyan | M | California | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124147 | Gangloff | Andrew | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 125748 | Gannaway | Amy | F | WA | AU | 1 | Surf Coast Century 100km 2025 (17 hours) |
| 124136 | Gannaway | James | M | WA | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 127483 | Gannon | Brad | M | UT | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 107486 | Gano | Rachael | F | Alaska | US | 4 | Cuyamaca 100km 2025 (17 hours) † |
| 120525 | Ganshofer | Rene | M | Steiermark | AT | 2 | Moab 238M 2025 (108 hours) † |
| 125915 | Gant | Matthew | M | Hampshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 105054 | Gao | Bibo | F | IL | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 101259 | Gapp | Nick | M | MI | US | 32 | Twisted Branch 100km 2025 (20 hours) † |
| 115760 | Garber | Ryan | M | Virginia | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 125037 | Garcia | Cyril | M | New York | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 125780 | García | Esteban | M | Las Palmas | ES | 1 | Transgrancanaria 125km 2025 (28 hours) |
| 125106 | Garcia | Francisco | M | Baja California | MX | 1 | Cuyamaca 100km 2025 (17 hours) |
| 104076 | Garcia | German | M | TX | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 107715 | Garcia | Luis | M | CA | US | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 125079 | GARCIA | Pablo | M | GUATEMALA | GT | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 100110 | Garcia | Rogelio | M | MEX | MX | 32 | Javelina Jundred 100M 2025 (30 hours) † |
| 123808 | Garcia JImenez | Rafael | M | Tarragona | ES | 1 | Transgrancanaria 125km 2025 (28 hours) |
| 123513 | GARCIA NUNEZ | RAFAEL ANDRES | M | Carabobo | VE | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 118891 | Garcia rodriguez | rafa | M | Ciudad Real | ES | 2 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 107346 | Garcia-Carroll | Ryan | M | GA | US | 16 | Cruel Jewel 106M 2025 (48 hours) † |
| 126556 | Garcia-Huidobro Prieto | Arturo | M | Camden | GB | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 109813 | Garczyk | Rafal | M | Greater Poland | PL | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 122694 | Gardener | Sam | M | Queensland | AU | 2 | Blackall 100km 2025 (18 hours) |
| 100778 | Gardham | Russell | M | GBR | GB | 1 | Western States 100M 2025 (30 hours) † |
| 125230 | Gardhouse | Sara | F | CO | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 120922 | Gardiner | Brandon | M | British Columbia | CA | 2 | Black Canyon 100km 2025 (17 hours) † |
| 127736 | Gardiner | Courtney | F | QLD | AU | 1 | Blackall 100km 2025 (18 hours) |
| 115328 | Gardner | Canaan | M | Ohio | US | 4 | Indiana 100M 2025 (30 hours) |
| 126419 | Gardner | Isaac | M | ID | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 119429 | Gardner | Justin | M | Leicestershire | GB | 2 | Mozart by UTMB 119km 2025 (23 hours) |
| 121737 | Gardner | Riley | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 115580 | Garelli | Giorgio | M | Italy | IT | 4 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 126035 | Garfinkel | Sydney | F | WA | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 119473 | Garlitz | Kirby | M | Oregon | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 125289 | Garlow | Trey | M | WV | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 113087 | Garmire | Jeffrey | M | WA | US | 8 | Cocodona 250M 2025 (125 hours) |
| 127784 | Garmon | Eric | M | VA | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 112048 | Garneau | Marie-Eve | F | Quebec | CA | 2 | Black Canyon 100km 2025 (17 hours) † |
| 111805 | Garneau | Michael | M | Québec | CA | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 105450 | Garneau | Simon | M | QC | CA | 64 | Cruel Jewel 106M 2025 (48 hours) † |
| 120247 | Garner | Erica | F | TX | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 108989 | Garner | Heidi | F | Ca | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 117439 | Garner | Kenny | M | AR | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 125897 | garner | oscar | M | TAS | AU | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 100211 | Garner | Paul | M | GBR | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 117785 | Garner | Zachary | M | UT | US | 2 | Bear, The 100M 2025 (36 hours) |
| 126999 | Garnett | Ian | M | East Dumbartonshire | GB | 1 | Western States 100M 2025 (30 hours) |
| 115722 | Garnier | David | M | Ohio | US | 2 | Canal Corridor 100M 2025 (30 hours) † |
| 124903 | Garrett | Andrew | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 127045 | Garrett | Ryan | M | OR | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 116485 | Garrido | Abraham | M | CA | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 126564 | Garriott | Heather | F | IN | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 125707 | Garrison | Mick | M | UT | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 118965 | Garrivier | Thibaut | M | Haute-Savoie | FR | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 108036 | Garro | Constance | F | NE | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 125195 | Garry | Eve | N | Utah | US | 1 | Bear, The 100M 2025 (36 hours) |
| 124453 | Garry | Paul | M | California | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 119972 | Garside | Richard | M | Clackmannanshire | GB | 2 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 103450 | Garten | Luke | M | CA | US | 8 | Leona Divide 100km 2025 (17 hours) |
| 123955 | Gärtner | Fabian | M | Aargau | CH | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 103776 | Garzolini | Tony | M | AZ | US | 64 | Black Canyon 100km 2025 (17 hours) † |
| 123092 | GASC | MICKAEL | M | SAUDI ARABIA | SA | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125113 | Gascho | Zach | M | MN | US | 1 | Mountain Lakes 100M 2025 (30 hours) † |
| 126389 | Gasser | Basil | M | Luzern | CH | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 118561 | Gassler | Thomas | M | Zürich | CH | 4 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 114969 | Gaston | Grady | M | MN | US | 4 | Hennepin 100M 2025 (30 hours) † |
| 126819 | Gates | Darrick | M | MI | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 101099 | Gates | Jorma | M | CA | US | 16 | Tarawera by UTMB 102km 2025 (17 hours) |
| 103436 | Gates | Lee | M | CO | US | 1 | Western States 100M 2025 (30 hours) † |
| 125078 | Gates | Lisa | F | AL | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 115808 | Gatta | Mauro | M | Italy | IT | 4 | Tuscany Crossing 160km 2025 (35 hours) |
| 111416 | Gatti | Leah | F | Alberta | CA | 8 | Grindstone by UTMB 100km 2025 (18 hours) |
| 118129 | Gaub | Andrew | M | PA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 127954 | Gaub | Troy | M | IL | US | 1 | Eastern States 100M 2025 (36 hours) |
| 122440 | Gauch | Sebastian | M | Baden Württemberg | DE | 2 | Zugspitz 100M 2025 (48 hours) |
| 120138 | Gaudrault | Lila | F | Maine | US | 2 | HOKA Bandera 100km 2025 (17 hours) |
| 108530 | gaudreault | Mike | M | QC | CA | 16 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 102176 | Gauld | Jodie-May | F | GBR | GB | 64 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 127545 | Gault | Marcus | M | QLD | AU | 1 | Guzzler Ultra 100km 2025 (24 hours) |
| 126187 | Gavitt | Jacob | M | New York | US | 1 | Eastern States 100M 2025 (36 hours) |
| 115489 | Gavloski | Lorraine | F | ON | CA | 4 | Sulphur Springs 100M 2025 (30 hours) |
| 120232 | Gaydon | Anthony | M | Hérault | FR | 2 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 103110 | Gayman | Greg | M | IA | US | 64 | Black Canyon 100km 2025 (17 hours) † |
| 121294 | Gaynor | Jen | F | NJ | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 115919 | Gdela | Katarzyna | F | Colorado | US | 2 | Tahoe 202M 2025 (100 hours) † |
| 122466 | Ge | Zhong | M | Beijing | CN | 1 | Western States 100M 2025 (30 hours) † |
| 125540 | Geanetta | Nicholas | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 120052 | Gedikian | Steve | M | CA | US | 2 | Leona Divide 100M 2025 (33 hours) † |
| 115170 | Gegato | Jonathan Jr | M | Bukidnon | PH | 2 | Hardcore Ultra Trail (HUT) 100M 2025 (44 hours) |
| 117508 | Gegu | Thierry | M | Pays de la Loire | FR | 2 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 101899 | Geib | Michelle | F | CO | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 105473 | Geidel | Eric | M | Solothurn | CH | 32 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 123202 | Geiger | Benjamin | M | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 114897 | Geiger | Michael | M | Baden-Württemberg | DE | 4 | Gran Trail Courmayeur 100km 2025 (28 hours) |
| 104300 | Geiple | Zach | M | PA | US | 32 | No Business 100M 2025 (34 hours) |
| 100710 | Gelinas | Chiara | F | CA | US | 32 | Kettle Moraine 100M 2025 (30 hours) † |
| 119953 | Gélinas | Étienne | M | QC | CA | 2 | Quebec Mega Trail 135km 2025 (32 hours) |
| 126824 | Gellatly | Curtis | N | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 126557 | gellene | chris | M | Virginia | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 100233 | Geno | Manny | M | MS | US | 4 | No Business 100M 2025 (34 hours) |
| 113054 | Gentry | Mike | M | TN | US | 4 | Zion 100km 2025 (19 hours) |
| 109124 | Geoffroy | DEGRANGE | M | ESSONE | FR | 4 | Swiss Canyon Trail 111km 2025 (24 hours) |
| 126409 | GEORG | Nicolas | M | FRANCE | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 123474 | George | Jennifer | F | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 120322 | George | Jessie | F | New York | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 101333 | George | Nicole | F | WA | US | 8 | Hood Hundred 100M 2025 (34 hours) |
| 107538 | Georgiev | Alex | M | New York | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 125359 | Georgiopoulos | Sotiris | M | LOndon | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 103580 | Geraghty | Sophie | F | AUS | AU | 16 | Surf Coast Century 100km 2025 (17 hours) |
| 126961 | Gerhard | Andrew | M | CA | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 104823 | Gerhart | Colton | M | ID | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 127460 | Gerlach | Matt | M | Oregon | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 124517 | Gerlach | Steven | M | CA | US | 1 | Quicksilver 100km 2025 (17 hours) |
| 125556 | Gerner | David | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 116845 | Gernes | Bryant | M | MT | US | 4 | Bighorn 100M 2025 (35 hours) |
| 125036 | Gero | Kristopher | M | AB | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 124140 | Geroux | Anne | F | FL | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 120478 | Gerson | Joel | M | MD | US | 2 | C & O Canal 100M 2025 (30 hours) † |
| 116971 | Gersten | Cambria | F | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 122762 | GERVAIS | Arthur | M | Centre France | FR | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 122770 | Gery | Jonniaux | M | Liège | BE | 2 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 127584 | Gerylo | Mikhail | M | Choose one | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 124271 | Gessel | Thad | M | Pa | US | 1 | Mohican 100M 2025 (32 hours) |
| 122317 | Geswell | Ryan | M | NC | US | 2 | Hellbender 100M 2025 (40 hours) † |
| 125625 | Geuke | Derik | M | MT | US | 1 | Crazy Mountain 100M 2025 (36 hours) † |
| 121253 | Geymayer | Paul | M | Bavaria | DE | 2 | Javornika 105km 2025 (24 hours) |
| 127840 | Geyssens | Maxim | M | Vlaams brabant | BE | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 120209 | Ghias | Babar | M | IL | US | 2 | Mohican 100M 2025 (32 hours) |
| 127923 | Ghiloni | Trent | M | NC | US | 1 | Umstead 100M 2025 (30 hours) |
| 115725 | Ghilotti | Francesco | M | Piemonte | IT | 2 | TOR100 - Cervino-Monte Bianco 100km 2025 (38 hours) |
| 124253 | Giammona | Lauren | F | Colorado | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 124563 | Gianniny | Gordon | M | CO | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 120626 | Gianopolus | Alexander | M | IN | US | 2 | Brazos Bend 100M 2024 (32 hours) |
| 121750 | giarrusso | joseph | M | Wyoming | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 124454 | Gibb | Matt | M | UK | GB | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 102840 | Gibbard | Benjamin | M | WA | US | 1 | Western States 100M 2025 (30 hours) † |
| 116102 | Gibbard | Jon | M | Oxon | GB | 4 | North Downs Way 100M 2025 (30 hours) |
| 124407 | Gibbens | Kingsley | M | NE | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 121360 | Gibbons | Allison | F | TN | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 121072 | Gibbons | Jack | M | IN | US | 2 | Tunnel Hill 100M 2024 (30 hours) |
| 120901 | Gibbons | Mike | M | ENG | GB | 2 | North Downs Way 100M 2025 (30 hours) |
| 113791 | Gibbons | Ren | M | CA | US | 4 | Beaverhead 100km 2025 (20 hours) |
| 108841 | Gibbs | Dustin | M | MD | US | 4 | Twisted Branch 100km 2025 (20 hours) † |
| 120505 | Gibbs | Eric | M | Ca | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 112000 | Gibbs | Nick | M | Michigan | US | 8 | Canal Corridor 100M 2025 (30 hours) |
| 126980 | GIBON | Mathis | M | Loire-Atlantique | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 113185 | Gibson | Billy | M | Angus | GB | 4 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 125460 | Gibson | Matt | M | TX | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 124013 | Gibson | Orla | F | Queensland | AU | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 124547 | Gibson | Rosie | F | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 100095 | Giebel | Yaniha | F | MN | US | 16 | Hennepin 100M 2025 (30 hours) † |
| 126763 | Giebelhaus | Alex | M | Washington | US | 1 | Cascade Crest 100M 2025 (34 hours) |
| 127437 | Gienger | Johannes | M | BW | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 125899 | Gierend | Vince | M | Rheinland-Pfalz | DE | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 124348 | Giese | Sheri | F | IA | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 113073 | Gifford | Eva | F | British Columbia | CA | 8 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 119505 | Gifford | Phil | M | IN | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 123632 | Gil | Alberto | M | San Jose | CR | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 125645 | Gil Grasa | Guillermo | M | Aragon | ES | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 126784 | Gilazhev | Aidar | M | Moscow | RU | 1 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 hours) |
| 120874 | Gilbert | Brian | M | TX | US | 2 | Crazy Mountain 100M 2025 (36 hours) † |
| 125558 | Gilbert | Davis | M | British Columbia | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 123804 | Gilbert | Jeff | M | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 124119 | Gilbert | Jimmy | M | TN | US | 1 | Mamba 100M 2024 (34 hours) † |
| 110628 | Gilbert | Nathaniel | M | UT | US | 16 | High Lonesome 100M 2025 (37 hours) |
| 123752 | Gilbert | Philip | M | VA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 126540 | Gilbert | Stephen | M | British Columbia | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 100854 | Gilbreath | Caleb | M | TN | US | 4 | Tunnel Hill 100M 2024 (30 hours) † |
| 114966 | Giles | Matt | M | Washington | US | 4 | Cascade Crest 100M 2025 (34 hours) |
| 115586 | Gill | Daniel | M | Cheshire | GB | 2 | Lakeland 100M 2025 (40 hours) |
| 115304 | Gill | Jonathon | M | North Yorkshire | GB | 2 | Hardwolds 80M 2024 (24 hours) |
| 127106 | Gill | Quinton | M | Ontario | CA | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 127613 | Gillespie | Aidan | M | Illinois | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 124395 | Gillham | Tony | M | AK | US | 1 | Cocodona 250M 2025 (125 hours) |
| 114342 | Gilliam | Daniel | M | Ca | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 119430 | Gilliland | Bob | M | East Sussex | GB | 2 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 124750 | Gilly | Cameron | M | LA | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 124139 | Gilman | Mark | M | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 119421 | Gilmer | Simeon | M | CA | US | 2 | Sean O'Brien 100km 2025 (17 hours) † |
| 125797 | Gilpatrick | Brendan | M | NC | US | 1 | Hellbender 100M 2025 (40 hours) † |
| 121895 | Gilroy | Henry | M | NY | US | 2 | Grindstone by UTMB 100M 2025 (36 hours) |
| 125453 | Giltinan | Robert | M | NSW | AU | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 111576 | Gilyatt | Rich | M | Somerset | GB | 4 | South Downs Way 100M 2025 (30 hours) |
| 124366 | Gimarc | Ryan | M | WA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 116716 | Giner | Julien | M | N/A | FR | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 127177 | Gingrich | Aaron | M | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 126782 | Ginsburg | Katharine | F | CA | US | 1 | Bigfoot 206M 2025 (100 hours) † |
| 103584 | Giordano | Gina | F | NY | US | 64 | Laurel Highlands 70.5M 2025 (20 hours) |
| 101357 | Giordano | Greg | M | CO | US | 64 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 123621 | Giral | Pedro | M | Aragon | ES | 1 | SwissPeaks 100km 2025 (28 hours) |
| 125302 | Girard | Camille | F | Québec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 119940 | Girard | Carl | M | QC | CA | 2 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 124031 | Girard | Loïc | M | Isere | FR | 1 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 115418 | GIRARD | Sophie | F | Picardie | FR | 2 | Restonica Trail by UTMB - Ultra-Trail® di Corsica 110km 2025 (36 hours) |
| 124122 | Giraudy | Simon | M | Île de France | FR | 1 | Swiss Alps 100M 2025 (50 hours) |
| 109775 | Giroud | Mathilde | F | Haut de seine | FR | 8 | Leona Divide 100M 2025 (33 hours) † |
| 121465 | Gisewski | Joachim | M | CO | US | 2 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 124713 | Gitt | Joseph | M | Utah | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 124441 | Giubilini | Roberta | F | WA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 120407 | Giuliano | Ryan | M | Manitoba | CA | 2 | Fat Dog 120M 2025 (48 hours) † |
| 127951 | Giunta | Mino | M | Oregon | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 115516 | Gjurković | Matej | M | Grad Zagreb | HR | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 126780 | Gladish | David | M | WA | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 121991 | Glaeser | Cory | M | OR | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 104384 | Glaser | Mat | M | CA | US | 32 | Gran Trail Courmayeur 100km 2025 (28 hours) |
| 125485 | Glass | Dylan | M | Alabama | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 107236 | Glatthor | Thorsten | M | - Auswählen - | DE | 16 | Swiss Alps 100km 2025 (22 hours) |
| 112346 | Glaze | Andrew | M | CA | US | 8 | Moab 238M 2025 (108 hours) † |
| 104442 | Glennie | Graham | M | AB | CA | 256 | Lost Soul Ultra 100km 2025 (21 hours) |
| 123105 | Glenny | Michael | M | Wellington | NZ | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 121885 | Gless | Clement | M | Mont blanc | FR | 2 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 112041 | Glibbery | Matthew | M | CA | US | 8 | IMTUF 100M 2025 (36 hours) † |
| 125494 | Glikman | Ilya | M | ON | CA | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 121550 | Glocksien | Kristopher | M | AZ | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 115245 | Glos | Vaclav | M | Czech Republic | CZ | 4 | Ultra Trail Vipava Valley 165km 2025 (46 hours) |
| 111219 | Gloyeske | Adam | M | Ohio | US | 8 | Tunnel Hill 100M 2024 (30 hours) † |
| 113759 | Glück | Matthias | M | Baden-Württemberg | DE | 1 | Western States 100M 2025 (30 hours) † |
| 100392 | Gnann | Abraham | M | NY | US | 32 | Pinhoti 100M 2025 (32 hours) † |
| 103139 | Gnoza | Stephen | M | CO | US | 64 | Miwok 100km 2025 (15:30:59 hours) |
| 106823 | Gobbell | Erik | M | Nevada | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 123615 | Godart | Julien | M | Marne | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 122442 | Goding | Josh | M | Victoria | AU | 2 | Buffalo Stampede 100km 2025 (23 hours) |
| 112410 | Godisart | Ashley | F | PA | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 116688 | Godwin | Sean | M | UT | US | 2 | Wasatch Front 100M 2025 (36 hours) † |
| 125059 | Godzik | Geoffrey | M | OR | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 125002 | Goertz | Maria | F | Minnesota | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 126706 | Goforth | Lexi | F | Tennessee | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 126714 | Goggin | Katy | F | GA | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 107488 | Goguely | Theo | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 116141 | Goh | EuJin | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 112478 | Goh | Mark | M | CA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 111275 | Goins | Don | M | Tennessee | US | 4 | Georgia Death Race 74M 2025 (24 hours) † |
| 108599 | Golaszewski | Gwen | F | Colorado | US | 16 | Kettle Moraine 100M 2025 (30 hours) † |
| 100644 | Gold | Neale | F | CA | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 107766 | Golda | Pawel | M | Malopolska | PL | 16 | Kierat 100km 2025 (27 hours) |
| 101585 | Goldberg | Kevin | M | CO | US | 8 | Cocodona 250M 2025 (125 hours) |
| 112330 | Goldberg | Michelle | F | PA | US | 8 | Cocodona 250M 2025 (125 hours) |
| 115310 | Golden | Joshua | M | MD | US | 4 | Cruel Jewel 106M 2025 (48 hours) † |
| 123620 | Goldman | Sam | M | RI | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 126918 | Goldsbrough | Greg | M | Somerset | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 121742 | Goldsmith | Benjamin | M | North Island | NZ | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 102049 | Goldstein | Matthew | M | NY | US | 8 | Vermont 100M 2025 (30 hours) |
| 127915 | Golebiowski | Nicholas | M | NC | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 100794 | Golembeski | Tom | M | CT | US | 2 | Vermont 100km 2025 (17 hours) |
| 124880 | Goliyad | Yuriy | M | New Jersey | US | 1 | Zion 100M 2025 (36 hours) † |
| 121349 | Gomes Silva | Erica | F | Minas gerais | BR | 2 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 125719 | Gomez | Charlie | M | AZ | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 121264 | GOMEZ | Damien | M | Grand Est | FR | 2 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 124188 | Gomez | Teresita | F | California | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 108195 | Gonring | Nicholas | M | WI | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 121250 | Gonsior | Julian | M | Bavaria | DE | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 105874 | Gonyaw | Kristen | F | PA | US | 32 | Twisted Branch 100km 2025 (20 hours) † |
| 111998 | Gonzales | Aaron | M | Texas | US | 2 | HOKA Bandera 100km 2025 (17 hours) |
| 126507 | gonzales | forrest | M | washington | US | 1 | Zion 100km 2025 (19 hours) |
| 126254 | Gonzales | Josh | M | NM | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 126970 | Gonzales | Rick | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 124767 | Gonzalez | Angelica | F | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 127044 | Gonzalez | Barnabas | M | AL | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 124500 | Gonzalez | Christian | M | NC | US | 1 | Umstead 100M 2025 (30 hours) |
| 122519 | Gonzalez | Christian | M | Sinaloa | MX | 2 | Zion 100km 2025 (19 hours) |
| 126569 | GONZALEZ | DANIEL | M | SAN LUIS POTOSI | MX | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 108954 | Gonzalez | Jose | M | CA | US | 16 | Canyons by UTMB 100M 2025 (35 hours) |
| 102832 | Gonzalez | Jose Humberto | M | PER | PE | 16 | Long Haul 100M 2025 (30 hours) † |
| 112589 | Gonzalez | Juan | M | NSW | AU | 8 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 110179 | Gonzalez | Lara | F | New York | US | 4 | C & O Canal 100M 2025 (30 hours) † |
| 115934 | Gonzalez | Michael | M | Utah | US | 2 | Wasatch Front 100M 2025 (36 hours) † |
| 101128 | Gonzalez | Milton | M | MEX | MX | 8 | High Lonesome 100M 2025 (37 hours) |
| 110770 | Gonzalez | Oscar | M | NY | US | 2 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 119366 | Gonzalez | Raul | M | Chile | CL | 2 | Mt Fuji 100M 2025 (46 hours) |
| 108675 | González Rodríguez | Juan | M | Barcelona | US | 2 | Penyagolosa 106km 2025 (26 hours) |
| 119343 | Gonzalez Sanchez | Jose | M | Alajuela | CR | 2 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 113571 | Gonzalez-outon | carlos | M | MADRID | US | 4 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 127344 | Goocey | Brent | M | IN | US | 1 | Indiana 100M 2025 (30 hours) |
| 127113 | Good | Jon | M | California | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 126171 | Goodall | Christine | F | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 124717 | Goodbody | Chrissy | F | PA | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 113758 | Goodell | Jessie | F | OR | US | 4 | Hood Hundred 100M 2025 (34 hours) |
| 127504 | Goodfellow | Reid | M | UT | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 106458 | Gooding | Jon | M | AUS | AU | 8 | Guzzler Ultra 100km 2025 (24 hours) |
| 124962 | Goodman | Melissa | F | PA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 120875 | Goodro | Mark | M | WA | US | 2 | Cascade Crest 100M 2025 (34 hours) |
| 125149 | Goodwin | Anna | F | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 105281 | Goodwin | Evan | M | CA | US | 128 | Cuyamaca 100km 2025 (17 hours) † |
| 104755 | Goodwin | Jeni | F | IL | US | 4 | Indiana 100M 2025 (30 hours) |
| 124755 | Goodwin | Katie | F | OR | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 124095 | Goodwin | Noah | M | WA | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 125202 | Goodwin | Sofia | F | CA | US | 1 | Zion 100M 2025 (36 hours) |
| 103418 | Goodyear | Scott | M | ON | CA | 64 | Sulphur Springs 100km 2025 (18 hours) |
| 118687 | Goose | Jake | M | British Columbia | CA | 2 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 112022 | Gopal | Arul Muthu | M | OH | US | 4 | Indiana 100M 2025 (30 hours) |
| 116341 | Göpel | Tobias | M | Thüringen | DE | 4 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 104011 | Gordon | Amy | F | AZ | US | 64 | Cruel Jewel 106M 2025 (48 hours) † |
| 125805 | Gordon | Chace | M | FL | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 124075 | Gordon | Ethan | N | TX | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 114230 | Gordon | Margaret | F | NM | US | 4 | Gran Trail Peñalara 110km 2025 (25 hours) |
| 106034 | Gordon | Quinten | M | NC | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 125868 | Gordon | Scott | M | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 101286 | Gordon | Tyler | M | CA | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 127489 | Gore | Matt | M | NSW | AU | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 123844 | GORI | DAVID | M | Geneva | CH | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 104305 | Gorichanaz | Tim | M | PA | US | 1 | Western States 100M 2025 (30 hours) † |
| 113725 | Goris | Rik | M | Vlaams-brabant | BE | 8 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 101600 | Gorney | Chris | M | NV | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 110758 | Goscinski | Dwayne | M | Co | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 115785 | Goshorn | Heath | M | Ohio | US | 4 | Canal Corridor 100M 2025 (30 hours) |
| 111163 | GOSLING | ALISON | F | SA | AU | 4 | Surf Coast Century 100km 2025 (17 hours) |
| 125695 | Gosnell | Noah | M | Oregon | US | 1 | Leona Divide 100km 2025 (17 hours) |
| 116761 | goto | norihito | M | 神奈川県 | JP | 4 | Mt Fuji 100M 2025 (46 hours) |
| 106473 | Goto | Taishi | M | JPN | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 121275 | Goto | Tetsuaki | M | Kanagawa | JP | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 101232 | Goudie | Mandi | F | BC | CA | 128 | Black Canyon 100km 2025 (17 hours) † |
| 105105 | Gould | Jeffrey | M | CA | US | 64 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 106663 | Goundry | Jim | M | NY | US | 128 | Vermont 100M 2025 (30 hours) |
| 103606 | Gourgas | Thomas | M | FRA | FR | 32 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 125366 | Goutal | Jean-Christophe | M | Normandie | FR | 1 | Grand Raid des Pyrénées - Ultra 160km 2025 (48 hours) |
| 100260 | Govey | Tom | M | KY | US | 8 | Yeti Virginia 100M 2025 (30 hours) † |
| 104490 | Gow | Joe | M | IL | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 126651 | Gowan | Kris | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 124190 | Gowans | Petra | F | Hampshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 111933 | Grabina | Matthew | M | New York | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 102684 | Grabow | Rachel | F | TX | US | 128 | Long Haul 100M 2025 (30 hours) † |
| 101813 | Grade | Michael | M | CA | US | 64 | Canyons by UTMB 104km 2025 (20 hours) |
| 100941 | Grady | Kyle | M | TN | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 109281 | Grafnetterova | Nikola | F | CO | US | 16 | High Lonesome 100M 2025 (37 hours) |
| 122780 | Graham | Andy | M | Oregon | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 115409 | Graham | Anthony | M | NSW | AU | 4 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 109742 | Graham | Brad | M | British Columbia | CA | 8 | Lost Soul Ultra 100km 2025 (21 hours) |
| 120816 | Graham | Carlie | F | WA | US | 2 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 115551 | Graham | Cayla | F | VA | US | 1 | Western States 100M 2025 (30 hours) † |
| 112905 | Graham | James | M | QLD | AU | 4 | Blackall 100km 2025 (18 hours) |
| 127985 | Graham | Taylor | F | WA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 116480 | Grahn | Holly | F | BC | CA | 2 | Fat Dog 120M 2025 (48 hours) † |
| 126402 | GRALL | Thomas | M | Rhône | FR | 1 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 114601 | Gram | Peter | M | WY | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 127929 | Gramajo | Carmen | F | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 124163 | Grande | Jordan | F | MD | US | 1 | Vermont 100M 2025 (30 hours) |
| 101576 | Granger | Charlie | M | NY | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 105025 | Granger | Max | M | GBR | GB | 2 | North Downs Way 100M 2025 (30 hours) |
| 122455 | Granier | Mahauld | F | France | FR | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 124089 | Grant | Cory | M | MA | US | 1 | Vermont 100M 2025 (30 hours) |
| 125985 | Grant | Daniel | M | Tn | US | 1 | No Business 100M 2025 (34 hours) |
| 127244 | Grant | David | M | London | GB | 1 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 111910 | Grant | Mike | M | OR | US | 4 | Pine to Palm 100M 2025 (34 hours) † |
| 110724 | Grant | Sophie | F | London | GB | 8 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 127092 | Grasel | Florian | M | NOE | AT | 1 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 112164 | Grassmann | Patrick | M | California | US | 2 | Leona Divide 100M 2025 (33 hours) † |
| 115527 | Gratteri | Roman | M | Oregon | US | 4 | San Diego 100M 2025 (32 hours) † |
| 123837 | Graubins | Holly | F | MN | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 126097 | GRAVRAND | Grégoire | M | ile de france | FR | 1 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 122166 | Gray | Ady | M | Lancashire | GB | 2 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 126741 | Gray | Hayden | M | MA | US | 1 | Vermont 100M 2025 (30 hours) |
| 106281 | Gray | Johnathan | M | GBR | GB | 64 | Thames Path 100M 2025 (30 hours) |
| 127094 | Gray | Luke | M | West Sussex | GB | 1 | North Downs Way 100M 2025 (30 hours) |
| 111744 | Gray | Matthew | M | NC | US | 4 | Umstead 100M 2025 (30 hours) |
| 102966 | Gray | Sho | M | TN | US | 16 | No Business 100M 2025 (34 hours) |
| 126087 | Gray-Rupp | Levi | M | PA | US | 1 | Worlds End 100km 2025 (19 hours) |
| 111577 | Grealy | Sarah | F | New South Wales | AU | 8 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 125902 | Greco | Mark | M | GA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 125615 | Greco | Troy | M | NJ | US | 1 | Eastern States 100M 2025 (36 hours) |
| 126058 | gredal andersen | anders | M | jylland | DK | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 116551 | Green | Alec | M | QLD | AU | 4 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 110229 | Green | Dan | M | West Virginia | US | 1 | Western States 100M 2025 (30 hours) † |
| 107298 | Green | David | M | Florida | US | 8 | Brazil 135M 2025 (60 hours) |
| 120719 | Green | Gabriel | M | CA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 114361 | Green | Gene | M | Georgia | US | 4 | Yeti Virginia 100M 2025 (30 hours) † |
| 117369 | Green | Jimmey | M | OK | US | 1 | Western States 100M 2025 (30 hours) † |
| 127103 | Green | Tiffany | F | MS | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 101551 | Green | Tyler | M | OR | US | 1 | Mt Fuji 100M 2025 (46 hours) |
| 122725 | Green | Vince | N | AL | US | 2 | Wasatch Front 100M 2025 (36 hours) † |
| 100328 | Green | Will | M | TX | US | 128 | High Lonesome 100M 2025 (37 hours) |
| 113245 | Greenberg | Dan | M | TX | US | 8 | Kettle Moraine 100M 2025 (30 hours) |
| 111837 | Greenberg | Harrison | M | New York | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 123360 | Greene | Ellyn | F | OR | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 123828 | Greene | Joe | M | NC | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 100863 | Greene | Justin | M | CA | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 124108 | Greene | Rebecca | F | NC | US | 1 | Umstead 100M 2025 (30 hours) |
| 126048 | Greene | Simon | M | Pennsylvania | US | 1 | Canal Corridor 100M 2025 (30 hours) |
| 124622 | Greenfield | Nicholas | M | Washington | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 101028 | Greenwood | John | M | GBR | GB | 64 | Grand Raid Ventoux by UTMB 124km 2025 (30 hours) |
| 112481 | Greenwood | Maiya | F | CA | US | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 112172 | Greer | Michael | M | AZ | US | 8 | Cocodona 250M 2025 (125 hours) |
| 127485 | Gregoire | Anthony | M | Marne | FR | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123906 | Gregory | Garet | M | AR | US | 1 | Mamba 100M 2024 (34 hours) † |
| 124927 | Gregr | Alice | F | Haute Savoie | FR | 1 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 119966 | Grendahl | Chance | M | Washington | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 103369 | Grengs | Patrick | M | AZ | US | 64 | C & O Canal 100M 2025 (30 hours) † |
| 105177 | Gresty | Ryan | M | GBR | GB | 8 | South Downs Way 100M 2025 (30 hours) |
| 121990 | Gretz | Josh | M | Pennsylvania | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 116447 | Grey | Emma | F | NSW | AU | 2 | North Downs Way 100M 2025 (30 hours) |
| 113984 | GRGICH | MARTIN | M | Córdoba | AR | 8 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 111798 | Grice | Nicola | F | BC | CA | 8 | Fat Dog 100km 2025 (24 hours) |
| 100303 | Grieve | Paul | M | Devon | GB | 4 | Valleys Ultra (13) 180km 2025 (46.5 hours) |
| 109615 | Griffenhagen | Gregg | M | CO | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 126181 | Griffin | Christopher | M | CO | US | 1 | Bighorn 100M 2025 (35 hours) |
| 117582 | Griffin | John | M | MS | US | 4 | Mamba 100M 2024 (34 hours) † |
| 116035 | Griffin | Louise | F | Hampshire | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 111666 | Griffin | Marc | M | Virginia | US | 8 | Yeti Virginia 100M 2025 (30 hours) † |
| 126487 | Griffin | Ryan | M | GA | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 125454 | Griffith | Jason | M | PA | US | 1 | Worlds End 100km 2025 (19 hours) |
| 111406 | Griffith | Matthew | M | TX | US | 8 | Georgia Death Race 74M 2025 (24 hours) † |
| 117305 | Griffith | Travis | M | CA | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 124580 | GRIFFITHS | JASON | M | AB | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 105824 | Griffiths | Matthew | M | GBR | GB | 8 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 105366 | Griffiths | Tim | M | MT | US | 16 | Crazy Mountain 100M 2025 (36 hours) † |
| 121545 | Grigg | Kevin | M | British Columbia | CA | 2 | Hood Hundred 100M 2025 (34 hours) |
| 119642 | Griggs | Simeon | M | North Tyneside | GB | 2 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 115379 | Grignon Gonzalez | Florian | M | Auvergne Rhône Alpes | FR | 2 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 100925 | Grigsby | Brianna | F | AZ | US | 64 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 119620 | Grigsby Smith | Holly | F | AL | US | 2 | Zion 100km 2025 (19 hours) |
| 104499 | Grills | Mat | M | AUS | AU | 8 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 123447 | Grim | Diane | F | Pa | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 121555 | Grima | Guillaume | M | PACA | FR | 2 | Istria by UTMB 110km 2025 (24 hours) |
| 127148 | Grimaldi | Andrea | M | Italia | IT | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 124150 | Grimm | David | M | ME | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 125124 | Grimm | Nicholas | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 125993 | Grindheim | Jana | F | North Carolina | US | 1 | Umstead 100M 2025 (30 hours) |
| 125382 | Grinnan | Samuel | M | NC | US | 1 | Hellbender 100M 2025 (40 hours) † |
| 124423 | Grinovich | Adam | M | NC | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 115751 | Grinstain | Joseph | M | California | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 120729 | Grismer | Bernadette | F | California | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 124080 | Grizot | Damien | M | Grand est | FR | 1 | SwissPeaks 360km 2025 (156 hours) |
| 112345 | Grobe | Jeffrey | M | AZ | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 127222 | Gröndahl | Trygve | M | Västra götaland | SE | 1 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 113136 | Groome | Miller | M | NC | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 126174 | Grooms | Kaley | F | CA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 127312 | Grosicki | Adrian | M | South Holland | NL | 1 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 117820 | Gross | Christian | M | Bayern | DE | 4 | Zugspitz 100M 2025 (48 hours) |
| 123639 | Grosse | Valentin | M | Elsass | FR | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 102677 | Grossman | Dominic | M | CA | US | 2 | Tahoe 202M 2025 (100 hours) † |
| 122846 | Grossova | Romana | F | Trenčiansky kraj | SK | 2 | Krakonosova Stovka 100km 2025 (22 hours) |
| 101852 | Grotenhuis | John | M | CO | US | 16 | Tahoe 202M 2025 (100 hours) † |
| 117019 | Grubbs | Eric | M | IN | US | 4 | Indiana 100M 2025 (30 hours) |
| 100493 | Grudziak | Marianna | F | Pa | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 118349 | Gruhl | Thomas | M | Select State | GB | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 122769 | Grulich | Roman | M | Czech republic | CZ | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 106831 | Grund | Matthew | M | 64 | Vermont 100km 2025 (17 hours) | ||
| 115685 | Grundmann | Nathan | M | North Carolina | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 116746 | Grunewald | Justin | M | CO | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 127462 | Grupe | Luke | M | California | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 105702 | Gryfe | Rob | M | ON | CA | 128 | Zion 100M 2025 (36 hours) † |
| 126123 | Gschliesser | Martin | M | Tirol | AT | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 107207 | Gschwandtner | Wolfgang | M | Austria | AT | 8 | Mozart by UTMB 119km 2025 (23 hours) |
| 122420 | Gu | Mingjie | M | shanghai | CN | 2 | Hong Kong 100K 100km 2025 (23 hours) |
| 103676 | Guarischi | Rosalia | F | BRA | BR | 2 | Zion 100M 2025 (36 hours) † |
| 119962 | Guener | Baris | M | New York | US | 2 | Zion 100km 2025 (19 hours) |
| 126950 | Guennoc | Benjamin | M | Bruxelles | BE | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 100298 | Guenther | Rebecca | F | CA | US | 64 | Canyons by UTMB 104km 2025 (20 hours) |
| 107361 | Guerard | Simon | M | Quebec | CA | 16 | Cocodona 250M 2025 (125 hours) |
| 121299 | Guerges | Abanoub | M | NJ | US | 2 | Vermont 100km 2025 (17 hours) |
| 127983 | Guerin | Annie | F | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 108547 | Guerini | Luca | M | Italy | IT | 1 | Western States 100M 2025 (30 hours) † |
| 121658 | Guermeur | Mik | M | Finistere | FR | 2 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 125143 | Guerrero | Connor | M | CA | US | 1 | Sean O'Brien 100km 2025 (17 hours) † |
| 115894 | Guerrero Barrera | Claudia | F | Virginia | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 122090 | Guess | Kelsey | F | Colorado | US | 2 | Never Summer 100km 2025 (23 hours) |
| 124420 | Guest | Ryan | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 108947 | Guevara | Amy | F | FL | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 116082 | Guffey | Jacob | M | North Carolina | US | 2 | Hellbender 100M 2025 (40 hours) † |
| 121267 | Gugelmann | Christian | M | Aargau | CH | 2 | Eiger Ultra Trail 250km 2025 (90 hours) |
| 120716 | Gugin | Matt | M | Ca | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 125326 | Guha | Dhrubajyoti | M | West Bengal | IN | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 123640 | Guidetti | Matteo | M | Bologna | IT | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 115715 | Guiheneuf | Nicolas | M | Bouches du Rhône | FR | 2 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 112692 | GUILFORD | MICHAEL | M | CO | US | 2 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 109550 | Guillaume | Clement | M | Ca | US | 16 | Miwok 100km 2025 (15:30:59 hours) |
| 115305 | Guillaume | DEVILLIERS | M | Egly | FR | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 116270 | Guillemant | Marion | F | TX | US | 4 | Dinosaur Valley 100km 2024 (22 hours) |
| 126472 | GUILLON | Jules-Emile | M | Haute Garonne | FR | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 126690 | Guillon | Julien | M | Nord | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 124008 | Guillon | Sylvain | M | France | FR | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 125284 | Guillot | Bryan | M | Louisiana | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 101071 | Guillot | Thierry Maxime | M | FL | FR | 128 | Angeles Crest 100M 2025 (36 hours) † |
| 126702 | GUIRAUD | Thierry | M | 83143 | FR | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125741 | Guler | Meghan | F | AZ | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 126026 | Gullone | Andrew | M | IL | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 125397 | Gully | Samuel | M | France | FR | 1 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 115036 | Gummerer | Thomas | M | South Tyrol | IT | 1 | Swiss Alps 100M 2025 (50 hours) |
| 127783 | Gundlach | Charles | M | CO | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126995 | Gunn | Justin | M | NJ | US | 1 | Sean O'Brien 100km 2025 (17 hours) † |
| 115460 | Günther | Timon | M | Bavaria | DE | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127430 | Guo | Danwei | F | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 124860 | Gupta | Anurag | M | Washington | US | 1 | Cascade Crest 100M 2025 (34 hours) |
| 124009 | Gupta | Himani | F | England | GB | 1 | Autumn 100M 2025 (28 hours) |
| 117133 | Guptill | Byron | M | ON | CA | 2 | No Business 100M 2025 (34 hours) |
| 118596 | Gura | Charlie | M | AZ | US | 4 | Sedona Canyons 125M 2025 (52 hours) |
| 118051 | Gusain | Avinash | M | CA | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 127787 | Gust | Benjamin | M | Colorado | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 104031 | Gustafsson | Kristin | F | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 124330 | Gutekunst | Meghan | F | CA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 127712 | Guthrie | Brad | M | CO | US | 1 | Waldo 100km 2025 (18 hours) † |
| 105628 | Guthrie | Forbes | M | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 120235 | Gutierrez | Javier | M | TX | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 126352 | Gutierrez | Jose | M | Indiana | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 124536 | Gutiérrez | Manuel | M | Santiago | CL | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125790 | Guy | Brad | M | Alabama | US | 1 | Pinhoti 100M 2025 (32 hours) |
| 111540 | Guyonnet | Benjamin | M | Rhône | FR | 4 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 105348 | Guza | Peter | M | MA | US | 32 | Rocky Raccoon 100M 2025 (30 hours) |
| 127404 | Güzel | Beyza | F | Kuruçeşme | TR | 1 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 hours) |
| 116669 | Guzick | Will | M | California | US | 4 | Bighorn 100M 2025 (35 hours) |
| 124026 | Gysel | Simon | M | ZH | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 127905 | Gysen | Alex | N | Alberta | CA | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 103182 | Ha | Tommy | M | CA | US | 64 | Nuts Ylläs Pallas 100km 2025 (22 hours) |
| 103637 | Haake | Klaus | M | DEU | DE | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 117869 | Haas | Chris | M | CA | US | 4 | Moab 238M 2025 (108 hours) † |
| 124479 | Haas | Jsoau | M | Zurich | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 125470 | Haberman | Matthew | M | MN | US | 1 | Crazy Mountain 100M 2025 (36 hours) † |
| 113956 | Haby | Shaun | M | Washington | US | 8 | Cascade Crest 100M 2025 (34 hours) |
| 124591 | Hachey | Amber | F | New Brunswick | CA | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 102417 | Hack | Michael | M | CA | US | 32 | San Diego 100M 2025 (32 hours) † |
| 117935 | Hackenberg | Ben | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 124350 | Hackenyos | Douglas | M | CT | US | 1 | Vermont 100km 2025 (17 hours) |
| 126469 | Hackett | Diana | F | New York | US | 1 | No Business 100M 2025 (34 hours) |
| 117352 | Haddley | Jay | M | Cheshire | GB | 4 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 118769 | Haddock | John | M | AR | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 102070 | Hadfield | Kevin | M | CO | US | 128 | Hardrock 100M 2025 (48 hours) † |
| 107224 | Hadley | Matthew | M | KS | US | 2 | Waldo 100km 2025 (18 hours) † |
| 124649 | Hadorn | Benjamin | M | Zürich | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 127832 | Haegy | Jonathan | M | Haut-Rhin | FR | 1 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 100117 | Haenggi | Michel | M | AUS | AU | 32 | Guzzler Ultra 100km 2025 (24 hours) |
| 107487 | Haeseler | Troy | M | WA | US | 1 | Western States 100M 2025 (30 hours) † |
| 103253 | Hagen | Bjoern | M | AZ | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 104546 | Hagen | Lindsey | F | OR | US | 8 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 124199 | Hager | David | M | TN | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 106836 | Hahn | Nathan | M | California | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 106837 | Hahn | Staci | F | WI | US | 256 | Sulphur Springs 100km 2025 (18 hours) |
| 117316 | Haidinger | Rainer | M | Upper Austria | AT | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 100816 | Haight | Daniel | M | OH | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 110069 | Haile | Cortney | F | CO | US | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 121006 | Haimes | David | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 125724 | Haire | Linda | F | Co | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 127968 | Haiss | Max | M | Ohio | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 110734 | Håkansson | Daniel | M | Helsingborg | SE | 4 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 120200 | Hakari | Lesley | F | TX | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 123578 | Hakim | Erin | F | CA | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 112726 | Halapin | Natalie | F | North Carolina | US | 8 | Mountain Lakes 100M 2025 (30 hours) † |
| 124324 | Halbmeier | Monika | F | ON | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 119935 | Hale | Barry | M | Lancashire | GB | 2 | West Highland Way 95M 2025 (30 hours) |
| 115692 | Hale | Jacob | M | Kentucky | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 107254 | Hale | James | M | Maryland | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 103455 | Hale | Kit | M | MN | US | 32 | Hennepin 100M 2025 (30 hours) † |
| 124604 | Haleem | Ather | M | Washington | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 125418 | Haley | Brian | M | MA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 125122 | Haley | Jonathon | M | WV | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 126880 | Haley | Ryan | M | GA | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 117253 | Halkosaari | Lauri | M | Uusimaa | FI | 2 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 102451 | Hall | Ashley | F | NV | US | 32 | Javelina Jundred 100M 2025 (30 hours) † |
| 102365 | Hall | Douglas | M | MA | US | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 103135 | Hall | Elijah | M | CA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 115277 | Hall | Graeme | M | Scottish Borders | GB | 2 | West Highland Way 95M 2025 (30 hours) |
| 126757 | Hall | Henry | M | UT | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 127706 | Hall | Jacob | M | Colorado | US | 1 | Saddles 100M 2025 (34 hours) † |
| 108283 | Hall | Jason | M | MO | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 124191 | Hall | Jason | M | MD | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 113027 | Hall | Jeffrey | M | UTAH | US | 8 | Wasatch Front 100M 2025 (36 hours) |
| 124925 | Hall | Marcus | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 118408 | Hall | Nick | M | Nsw | AU | 4 | Guzzler Ultra 100km 2025 (24 hours) |
| 126524 | Hall | Pamela | F | ME | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 112065 | hall | peter | M | colorado | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 118071 | Hall | Raymond | M | Illinois | US | 4 | Cruel Jewel 106M 2025 (48 hours) † |
| 124484 | Hall | Rini | F | Washington | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 118832 | Hall | Samuel | M | Texas | US | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 121055 | HALL NIELSEN | PETER | M | MG | BR | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 117354 | Hallahan | Patrick | M | NY | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 124156 | Hallam | Ezra | M | IA | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 111571 | Hallermann | Ryan | M | MN | US | 4 | Kettle Moraine 100M 2025 (30 hours) † |
| 116196 | Halliburton | Kevin | M | TX | US | 4 | Laurel Highlands 70.5M 2025 (20 hours) |
| 126152 | Hallmark | Kyler | M | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 113122 | Hallmark | Luke | M | WI | US | 8 | Superior 100M 2025 (38 hours) † |
| 126646 | Halloran | Patrick | M | CT | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 126654 | Hallows | Jon | M | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 111811 | Halls | Jen | F | TN | US | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 127846 | Halls | Ollie | M | Somerset | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 127842 | Haluska | Leslie | F | AB | CA | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 127766 | Ham | Phillip | M | NY | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 100827 | Hamberlin | Deborah | F | AZ | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 123913 | Hamblett | Johanna | N | Nz | NZ | 1 | Black Canyon 100km 2025 (17 hours) † |
| 105034 | Hamdorff | Ryan | M | SC | US | 4 | Tunnel Hill 100M 2024 (30 hours) † |
| 124063 | Hameed | Shirhaan | M | Maldives | US | 1 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 116277 | Hamel | Erika | F | NH | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 125270 | Hamel | Gregory | M | CA | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 126974 | Hamidovic | Husmir | M | ID | US | 1 | Zion 100km 2025 (19 hours) |
| 127904 | Hamill | Andrew | M | CA | US | 1 | Leona Divide 100km 2025 (17 hours) |
| 106840 | Hamilton | Andy | M | 16 | Hardrock 100M 2025 (48 hours) † | ||
| 124255 | Hamilton | Luke | M | TX | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 100365 | Hamilton | Michael | M | ON | CA | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 113726 | Hamilton | Nicholas | M | Ca | US | 8 | HURT 100M 2025 (36 hours) † |
| 121270 | Hamlet | Alexander | M | London | GB | 2 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 120415 | hamlin | lance | M | Colorado | US | 2 | Zion 100km 2025 (19 hours) |
| 107721 | Hamlin | Michael | M | CA | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 112375 | Hamm | Hannah | F | OR | US | 4 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 118403 | Hamman | Aaron | M | MI | US | 4 | Indiana 100M 2025 (30 hours) |
| 125901 | HAMMETT | Dan | M | Otago | NZ | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 101331 | Hammett | Ron | M | FL | US | 16 | Long Haul 100M 2025 (30 hours) † |
| 121800 | Hammond | Jason | M | Oklahoma | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 112578 | Hammond | Mark | M | Utah | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 120292 | Hammonds | Nicholas | M | OH | US | 2 | Vermont 100km 2025 (17 hours) |
| 102741 | Hamoudi | Lindsay | M | PA | US | 512 | Twisted Branch 100km 2025 (20 hours) † |
| 103050 | Hampton | John | M | NV | US | 64 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 120736 | Hamran | Matej | M | Slovakia | SK | 2 | Javornika 105km 2025 (24 hours) |
| 116873 | Hamulecki | Julie | F | Ontario | CA | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 120812 | Hancey | Brian | M | UT | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 127927 | Hancock | Brian | M | Missouri | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 124015 | Hancock | Jamie | M | Shropshire | GB | 1 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 108884 | Hancock | Nicholas | M | Wiltshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 125553 | Handel | Nicholas | M | CA | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 103846 | Handelman | Leah | F | MT | US | 8 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 115663 | Hanes | Lucie | F | Colorado | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 104347 | Haney | Charlie | M | TN | US | 32 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 116282 | Hangler | Markus | M | Upper Austria | AT | 4 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 126304 | Hankinson | Eric | M | California | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 125944 | Hanks | Ed | M | Virginia | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 123207 | Hanley | Nate | M | MD | US | 2 | Massanutten 100M 2025 (36 hours) † |
| 127665 | Hanley | Will | M | FL | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 125307 | Hanlon | Thomas | M | MA | US | 1 | Vermont 100M 2025 (30 hours) |
| 120207 | HANNA | Myvanwy | F | Midlothian | GB | 2 | Transgrancanaria 125km 2025 (28 hours) |
| 102405 | Hanna | Zach | M | FL | US | 2 | Burning River 100M 2025 (30 hours) |
| 118697 | Hannaford | Chris | M | CO | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 120071 | Hannak | Pawel Ignacy | M | Zurich | CH | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 123591 | Hannis | Damon | M | West Midlands | GB | 1 | Thames Path 100M 2025 (30 hours) |
| 102234 | Hanschka | Whitney | M | MA | US | 32 | Miwok 100km 2025 (15:30:59 hours) |
| 104473 | Hansen | Aaron | M | MN | US | 16 | Superior 100M 2025 (38 hours) † |
| 124890 | Hansen | Dallas | M | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 117890 | HANSEN | DENNIS | M | Copenhagen | DK | 4 | TOR130 - Tot Dret 130km 2025 (44 hours) |
| 120384 | Hansen | Jacob | M | UT | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 120476 | Hansen | Jody | F | Oregon | US | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 114993 | Hansen | Jon | M | Wa | US | 2 | Crazy Mountain 100M 2025 (36 hours) |
| 112598 | Hansen | Laura | F | CA | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 102845 | Hansen | Rick | M | AK | US | 64 | Miwok 100km 2025 (15:30:59 hours) |
| 109441 | Hansez | Benoît | M | Belgium | BE | 8 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 123518 | Hanshew | Trey | M | PA | US | 1 | Worlds End 100km 2025 (19 hours) |
| 117965 | Hanson | Emily | F | MD | US | 2 | Laurel Highlands 70.5M 2025 (20 hours) |
| 120596 | Hanson | Jessica | F | Colorado | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 105729 | Hanson | Jon | M | CO | US | 16 | Run Rabbit Run 100M 2025 (36 hours) |
| 105206 | Hanson | Nicholas | M | MI | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 110249 | Hansson | Anders | M | Sweden | SE | 8 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 119780 | Hanstein | Darryl | M | Buckinghamshire | GB | 2 | Autumn 100M 2025 (28 hours) |
| 111641 | Hara | Tomomi | F | tokyo | JP | 4 | OSJ Ontake 100M 2025 (24 hours) |
| 111448 | Harada | Taihei | M | Kagawa-ken | JP | 4 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 126973 | HARADA | TAMAE | F | Osaka | JP | 1 | Formosa Trail 104km 2024 (28 hours) |
| 103887 | Harada | Yukihiro | M | CA | US | 32 | FunTrails Chichibu & Okumusashi 105km 2024 (30 hours) |
| 107815 | Harary | Alex | M | CA | US | 16 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 125552 | Harasyko | William | M | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) |
| 123771 | Harcar | Jamie | F | Pennsylvania | US | 1 | Indiana 100M 2025 (30 hours) |
| 126498 | Harder | Kevin | M | Manitoba | CA | 1 | Black Canyon 100km 2025 (17 hours) † |
| 112955 | Hardes | Christoph | M | Nordrhein-Westfalen | DE | 8 | Zugspitz 100M 2025 (48 hours) |
| 118025 | Hardin | Chris | M | North Carolina | US | 4 | Grindstone by UTMB 100km 2025 (18 hours) |
| 115026 | Harding | Jared | M | AZ | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 124773 | Hardman | Jonathon | M | Angus | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 123995 | Hardman | Russell | M | London | GB | 1 | Autumn 100M 2025 (28 hours) |
| 101628 | Hardt | Frank | M | DEU | DE | 32 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 113367 | Hardwick | George | M | Greater London | GB | 8 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 124232 | Hardwick | Joel | M | West yorkshire | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 124930 | Hardy | Alisa | F | TX | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 125909 | Hardy | Dom | M | Berkshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 100011 | Hardy | Jessica | F | CA | US | 32 | Hellbender 100M 2025 (40 hours) † |
| 112945 | Harem | Robert | N | SC | US | 8 | No Business 100M 2025 (34 hours) |
| 111537 | Hargesheimer | Julia | F | TX | US | 8 | Kettle Moraine 100M 2025 (30 hours) † |
| 108492 | Hargreaves | Ryan | M | AZ | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 126493 | Hargrove | Brady | M | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 114148 | Harink | Ash | M | VIC | AU | 8 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 122738 | Harmon | Meaghan | F | IL | US | 2 | C & O Canal 100M 2025 (30 hours) † |
| 104748 | Harner | Ben | M | CA | US | 128 | HURT 100M 2025 (36 hours) † |
| 125395 | Harnett | Damien | M | Munster | IE | 1 | Kerry Way Ultra 101km 2025 (20 hours) |
| 125921 | Harnie | Julia | F | Auvergnes Rhones Alpes | FR | 1 | Western States 100M 2025 (30 hours) |
| 107643 | Harpe | Lance | M | WA | US | 16 | Cascade Crest 100M 2025 (34 hours) |
| 121191 | Harrap | Liam | M | Alberta | CA | 2 | Fat Dog 120M 2025 (48 hours) † |
| 101540 | Harreld | Nick | M | MT | US | 16 | Grindstone by UTMB 100M 2025 (36 hours) |
| 125181 | Harrigan | Lucas | M | NY | US | 1 | Vermont 100M 2025 (30 hours) |
| 104070 | Harrington | Christopher | M | CO | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 127771 | Harrington | Sean | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 105762 | Harris | Adam | M | BC | CA | 1 | Crazy Mountain 100M 2025 (36 hours) † |
| 127295 | harris | bradley | M | ACT | US | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 124384 | Harris | Cassie | F | AR | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 117215 | Harris | Cody | M | PA | US | 2 | Eastern States 100M 2025 (36 hours) |
| 126656 | Harris | Devin | M | Ca | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 126017 | Harris | Emma | F | Hampshire | GB | 1 | Kerry Way Ultra 193km 2025 (40 hours) |
| 127247 | Harris | Grace | F | Texas | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 126997 | HARRIS | JEREMY | M | GA | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 125046 | Harris | Josh | M | Wisconsin | US | 1 | Superior 100M 2025 (38 hours) † |
| 102353 | Harris | Kenten | M | CA | US | 32 | Canyons by UTMB 104km 2025 (20 hours) |
| 122295 | Harris | Megan | F | Vic | AU | 2 | Surf Coast Century 100km 2025 (17 hours) |
| 127679 | Harris | Nigel | M | Virginia | US | 1 | Zion 100M 2025 (36 hours) † |
| 126316 | Harris | Peter | M | VIC | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 127823 | Harris | Scott | M | Dorset | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 126601 | Harris | Stephen | M | Victoria | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 106587 | Harrison | Ben | M | QLD | AU | 2 | Buffalo Stampede 100km 2025 (23 hours) |
| 125835 | Harrison | Carl | M | WA | AU | 1 | Surf Coast Century 100km 2025 (17 hours) |
| 111896 | Harrison | Dean | M | west midlnds | GB | 8 | Thames Path 100M 2025 (30 hours) |
| 113445 | Harrison | Genevieve | F | Colorado | US | 8 | Leadville Trail 100M 2025 (30 hours) |
| 121776 | Harrison | Hazel | F | Wellington | NZ | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 116327 | Harrison | Jon | M | CO | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 118671 | Harrison | Justin | M | California | US | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 120248 | Harrison | Kevin | M | England | GB | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 123039 | Harrison | Peter | M | Zuid Holland | NL | 2 | South Downs Way 100M 2025 (30 hours) |
| 116013 | Harshbarger | Wes | M | Montana | US | 2 | HURT 100M 2025 (36 hours) † |
| 112984 | Hart | David | M | Wisconsin | US | 8 | Kettle Moraine 100M 2025 (30 hours) † |
| 124998 | Hart | Edmund | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 123822 | Hart | Emily | F | MD | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 102116 | Hart | Madison | F | CO | US | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126112 | Hart | Nicholas | M | Colorado | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 121960 | Harté | Julien | M | Loire-Atlantique | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 127051 | Harte | Lari | F | TX | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 114378 | Harter | Brian | M | CA | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 125304 | Harter | Joseph | M | CA | US | 1 | San Diego 100M 2025 (32 hours) † |
| 120772 | Hartikainen | Lauri | M | Uusimaa | FI | 2 | Nuts Ylläs Pallas 160km 2025 (35 hours) |
| 124601 | Hartland | John | M | South Dakota | US | 1 | Javelina Jundred 100M 2025 (30 hours) |
| 120827 | Hartman | Brad | M | UT | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 121848 | Hartman | Brock | M | Wa | US | 2 | Waldo 100km 2025 (18 hours) † |
| 109829 | Hartupee | Michael | M | TN | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 118322 | Hartwig | Ryan | M | CA | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 108888 | Harvey | David | M | Alabama | US | 8 | Cruel Jewel 106M 2025 (48 hours) † |
| 121468 | Harvey | Myles | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 107232 | Harvey | Nikki | F | AL | US | 8 | Cruel Jewel 106M 2025 (48 hours) † |
| 112454 | Harvey | Sam | M | Somerset | GB | 8 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 120288 | Harvey | Wynne | M | Tx | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 127424 | Hase | Saori | F | Kanagawa | JP | 1 | Lake Biwa 100M 2025 (52 hours) |
| 125194 | Haskins | Max | M | Wisconsin | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 113801 | hasler | troy | M | queensland | AU | 4 | Guzzler Ultra 100km 2025 (24 hours) |
| 127040 | Hasling | Callan | M | GA | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 102720 | Hasman | Alexa | F | OR | US | 16 | Cocodona 250M 2025 (125 hours) |
| 126060 | Hass | Tyler | M | WI | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 104972 | Hasse Petersen | Anders | M | DNK | DK | 8 | Kierat 100km 2025 (27 hours) |
| 102793 | Hasselrot | Mikael | M | SWE | SE | 32 | Täby Extreme Challenge 100M 2025 (30 hours) |
| 106845 | Hastings | Orestes Pat | M | CO | US | 4 | Never Summer 100km 2025 (23 hours) |
| 126987 | Hata | Yoshiki | M | Tokyo | JP | 1 | Mt Fuji 100M 2025 (46 hours) |
| 110998 | Hataway | Shannon | F | NV | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 118501 | Hathiramani | Raj | M | NY | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 123441 | Hatinguais | Victor | M | IDF | FR | 1 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 118383 | Hatt | Katie | F | CO | US | 2 | Mountain Lakes 100M 2025 (30 hours) † |
| 121422 | Hattler | Frank | M | California | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 125217 | Hattori | Jun | M | Chiba | JP | 1 | Mt Fuji 100M 2025 (46 hours) |
| 127358 | Hauer | Zach | M | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 120550 | Haugen | Aaron | M | WA | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 116372 | Haunschmidt | Patrick | M | BC | CA | 4 | High Lonesome 100M 2025 (37 hours) |
| 113015 | Haupert | Charles | M | Colorado | US | 4 | Superior 100M 2025 (38 hours) † |
| 127639 | Hauser | Andrew | M | TN | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 125237 | Hauser | Matt | M | CA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 101122 | Hausken | Janet | F | CO | US | 128 | Bighorn 100M 2025 (35 hours) |
| 127145 | Hausmann | Fredrik | M | Norge | NO | 1 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 126358 | Haustein | Chris | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 105090 | Hautefeuille | Laurent | M | CA | US | 64 | Miwok 100km 2025 (15:30:59 hours) |
| 123819 | Haveman | Bernard | M | Utrecht | NL | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 107329 | Haven | Kimberly | F | FL | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 112476 | Havers | Judith | F | Hamburg | DE | 2 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 hours) |
| 123249 | Havlik | Rostislav | M | Louisiana | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 102958 | Hawbaker III | Lyman | M | NY | US | 128 | Wasatch Front 100M 2025 (36 hours) † |
| 113000 | Hawes | Tom | M | WI | US | 8 | Canal Corridor 100M 2025 (30 hours) † |
| 100519 | Hawkes | Kenneth | M | OR | US | 16 | Hood Hundred 100M 2025 (34 hours) |
| 117879 | Hawkes | Tony | M | WA | US | 4 | Waldo 100km 2025 (18 hours) † |
| 100367 | Hawkins | Jennifer | F | GA | US | 32 | Rim to River 100M 2025 (32 hours) † |
| 127671 | Hawkins | Madeleine | F | British Columbia | CA | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 126838 | Hawkins | Mark | M | IN | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 103030 | Hawkins | Matt | M | TN | US | 16 | Hardrock 100M 2025 (48 hours) † |
| 114106 | Hawkins | Rachel | F | Oregon | US | 4 | Pine to Palm 100M 2025 (34 hours) |
| 116143 | Hawkins-Jackson | Morgan | F | CA | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 120796 | Hawks | Vernon | M | WA | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 124088 | Hawley | Angie | F | ON | CA | 1 | Indiana 100M 2025 (30 hours) |
| 109987 | Hawley | Bradley | M | Va | US | 8 | Eastern States 100M 2025 (36 hours) |
| 102391 | Hawn | Thomas | M | WA | US | 8 | Fat Dog 100km 2025 (24 hours) |
| 124802 | Haworth | Sarah | F | CA | US | 1 | San Diego 100M 2025 (32 hours) † |
| 119685 | Haws | Joshua | M | Ut | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 115112 | Hay | Angus | M | New South Wales | AU | 4 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 100527 | Hay | Ross | M | CHE | CH | 4 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 120025 | Hayashi | Shuta | M | kanagawa | JP | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 123376 | Haycock | Brady | F | DC | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 111566 | Hayde | Harry | M | kansas | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 108580 | Hayden | Chris | M | Wyoming | US | 8 | Bighorn 100M 2025 (35 hours) |
| 117842 | Hayden | Matthew | M | Ohio | US | 4 | Burning River 100M 2025 (30 hours) |
| 127895 | Hayes | Debbie | F | Alabama | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 111808 | Hayes | Joshua | M | PA | US | 8 | Twisted Branch 100km 2025 (20 hours) † |
| 114884 | HAYGOOD | COREY | M | AZ | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 104491 | Haynes | Jesse | M | CA | US | 64 | High Lonesome 100M 2025 (37 hours) |
| 127036 | Haynes | Matt | M | Oregon | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 120351 | Haynes | Mitch | M | Illinois | US | 2 | Bighorn 100M 2025 (35 hours) |
| 110083 | Haynes | Tiffany | F | CA | US | 8 | Tahoe 202M 2025 (100 hours) † |
| 120328 | Hayter | Noah | M | US-MI | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 117510 | Hayward | Laura | F | CA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 120988 | Hayward | Nate | M | UT | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 103295 | Hayward | Will | M | HKG | HK | 16 | Hong Kong 100K 100km 2025 (23 hours) |
| 127735 | Haze | Gert-Jan | M | Utrecht | NL | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 123471 | Hazel | Christopher | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 120605 | Hazell | Jonathon | M | London | GB | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 126762 | Hazen | Casey | M | NC | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 105534 | Hazra | Amit | M | CA | US | 16 | Pine to Palm 100M 2025 (34 hours) † |
| 125975 | He | Lingyi | F | Shanghai | CN | 1 | Nike ACG Ultra-Trail Chongli 168km 2025 (48 hours) |
| 120641 | he | xiali | F | MA | US | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 118263 | Head | Brandon | M | TX | US | 4 | Moab 238M 2025 (108 hours) |
| 118683 | head | brian | M | NB | CA | 2 | Black Canyon 100km 2025 (17 hours) † |
| 127803 | Head | Danika | F | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 121787 | Head | Ryan | M | UT | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 127109 | Headley | Garrett | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 103377 | Headrick | Christopher | M | OH | US | 32 | Vermont 100M 2025 (30 hours) |
| 106070 | Heady | Cynthia | F | KY | US | 2 | Indiana 100M 2025 (30 hours) |
| 107250 | Healey | Eddy | M | East Riding of Yorkshire | GB | 1 | Western States 100M 2025 (30 hours) † |
| 106640 | Hearn | Bob | M | CA | US | 128 | Javelina Jundred 100M 2025 (30 hours) † |
| 101207 | Hearne | Matthew | M | GBR | GB | 128 | Autumn 100M 2025 (28 hours) |
| 125627 | Heasman | Rupert | M | London | GB | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 115154 | Heater | Zachary | M | WA | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 120886 | Heath | Britta | F | New York | US | 2 | Vermont 100km 2025 (17 hours) |
| 105806 | Heath | Tristan | M | AUS | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 118306 | Heaton | Dennis | M | MN | US | 4 | Superior 100M 2025 (38 hours) |
| 121421 | Heavener | Trace | M | ID | US | 2 | Mohican 100M 2025 (32 hours) |
| 124718 | Hebert | Dante | M | OR | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) |
| 126303 | Heckles | David | M | England | GB | 1 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 126429 | Heckman | Andrew | M | PA | US | 1 | Eastern States 100M 2025 (36 hours) |
| 123977 | Hedges | Ian | M | Hampshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 114798 | Hedley | Giles | M | London | GB | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 113736 | Hedlund | Lars | M | Västerbotten | SE | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 115789 | Hedrick | Jeff | M | NV | US | 4 | Wasatch Front 100M 2025 (36 hours) † |
| 116744 | Hefner | Jayson | M | NV | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 112601 | hefzy | hebah | F | MI | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 120378 | Hegedus | Gergely | M | Alberta | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 114426 | Heidegger | Ben | M | Oregon | US | 4 | Pine to Palm 100M 2025 (34 hours) † |
| 116593 | Heidemann | Eric | N | CA | US | 2 | San Diego 100M 2025 (32 hours) † |
| 111256 | Heighway | Stuart | M | Canterbury | NZ | 4 | Tarawera by UTMB 100M 2025 (36 hours) |
| 126374 | Heilala | Nea | F | North Karelia | FI | 1 | Nuts Ylläs Pallas 160km 2025 (35 hours) |
| 120017 | Hein | Alex | M | Texas | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 101304 | Hein | Erich | M | GA | US | 64 | Cruel Jewel 106M 2025 (48 hours) † |
| 124058 | Heinowsky | Enrico | M | Berlin | DE | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 114971 | Heinrich | Jason | M | Tn | US | 2 | Saddles 100M 2025 (34 hours) † |
| 126360 | Heinrichs | Jordan | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 117561 | Heinze | Bryan | M | MI | US | 2 | Canal Corridor 100M 2025 (30 hours) † |
| 120882 | Heirbaut | Arne | M | Flanders | BE | 2 | Mallorca by UTMB: Serra de Tramuntana (SDT) 135km 2025 (30 hours) |
| 127872 | Heiselberg | Stine | F | Holbaek | DK | 1 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 125598 | Heisler | Stefan | M | California | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 124236 | Heiss | Ethan | M | DC | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 111764 | Heist | Brandon | M | NC | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 104073 | Heizmann | Thomas | M | DEU | DE | 2 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 124037 | Hélène | Seyrès | F | Hérault | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 116950 | Helfrich | Michael | M | AB | CA | 4 | Dinosaur Valley 100km 2024 (22 hours) |
| 113681 | Helland | Elizabeth | F | CO | US | 8 | Zion 100km 2025 (19 hours) |
| 102250 | Hellings | Tammy | F | IL | US | 128 | C & O Canal 100M 2025 (30 hours) † |
| 123728 | Helm | Jeffrey | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 120652 | Helmert | Christian | M | Germany | DE | 2 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 118729 | Helms | Mike | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 125908 | Heloury | Yves | M | Brittany | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 104610 | Hemmen | Isaiah | M | WA | US | 4 | Hardrock 100M 2025 (48 hours) † |
| 118499 | Hemming | Mat | M | Dorset | GB | 2 | Autumn 100M 2025 (28 hours) |
| 113644 | Henckel | Kelly | F | WA | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 123696 | Henderson | Jonathan | M | Mn | US | 1 | Superior 100M 2025 (38 hours) † |
| 122835 | Henderson | Matthew | M | California | US | 2 | Tahoe 202M 2025 (100 hours) † |
| 126166 | Hendrickson | Lauren | F | KY | US | 1 | No Business 100M 2025 (34 hours) |
| 126151 | Hendrikx | Aaron | M | Ontario | CA | 1 | Black Canyon 100km 2025 (17 hours) |
| 126158 | Hengartner | Marc | M | VA | US | 1 | Hellgate 100km 2024 (17 hours) |
| 116996 | Henke | Patrick | M | NM | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 112161 | Henkel | Oliver | M | BRITISH COLUMBIA | CA | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 116230 | Henkelman | James | M | MN | US | 4 | Superior 100M 2025 (38 hours) † |
| 120743 | Henkle | Jameson | M | Ca | US | 1 | Sean O'Brien 100km 2025 (17 hours) † |
| 102669 | Henn | Marc | M | TX | US | 64 | Dinosaur Valley 100km 2024 (22 hours) |
| 124396 | Hennecke | Christian | M | Baden Württemberg | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 123770 | Hennequin | Florian | M | France | FR | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 124791 | Hennessy | Steve | M | MN | US | 1 | Superior 100M 2025 (38 hours) † |
| 116094 | Hennigar | Stephen | M | LA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 116415 | Henning | Brennan | M | Virginia | US | 2 | Laurel Highlands 70.5M 2025 (20 hours) |
| 125574 | Henning | Jessica | F | CA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 110565 | Henning | John | M | KY | US | 4 | No Business 100M 2025 (34 hours) |
| 122810 | HENOUX | Arnaud | M | HAUTS DE SEINE | FR | 2 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 124704 | Henriksen | Torjus | M | Trøndelag | NO | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 119067 | Henry | Jules | M | VAUD | CH | 2 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 127329 | Henry | Julien | M | 88 | FR | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 127596 | Henry | Justin | M | CO | US | 1 | Black Canyon 100km 2025 (17 hours) |
| 124906 | Henry | Mykel | M | Maine | US | 1 | Vermont 100M 2025 (30 hours) |
| 126578 | Henry | Oliver | M | Waikato | NZ | 1 | Taupo 100km 2025 (17 hours) |
| 101320 | Henry | Susan | F | OR | US | 4 | IMTUF 100M 2025 (36 hours) |
| 117621 | Henry | William | M | PA | US | 4 | Tahoe 202M 2025 (100 hours) |
| 126253 | Henry | William | M | MS | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 101718 | Henscheid | Stefan | M | DEU | DE | 32 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 124197 | Hensley | Shyla | F | TN | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 125628 | Henson | Daisey | F | TX | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 104463 | Henson | Lucas | M | WI | US | 64 | Canal Corridor 100M 2025 (30 hours) † |
| 106248 | Henson | Michael | M | WA | US | 32 | Hardrock 100M 2025 (48 hours) † |
| 109883 | Hentsch | Torsten | M | Thüringen | DE | 4 | Javornika 105km 2025 (24 hours) |
| 117574 | Hepler | Clinton | M | PA | US | 4 | Massanutten 100M 2025 (36 hours) † |
| 120470 | Hepp-Buchanan | Max | M | WA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 117076 | Heppell | Isaac | M | Marlborough | NZ | 2 | Taupo 100km 2025 (17 hours) |
| 119058 | Her-flores | Mao | F | Ca | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 121899 | Herbert | Steve | M | OCCITANIE | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 126277 | Herbon | Goldamer | F | CA | US | 1 | San Diego 100M 2025 (32 hours) † |
| 116204 | Herczeg | Jonathan | M | California | US | 4 | Hood Hundred 100M 2025 (34 hours) |
| 103791 | Herdt | Ilja | M | CA | US | 32 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 119823 | Herget | Christopher | M | Rheinland-Pfalz | DE | 2 | Istria by UTMB 110km 2025 (24 hours) |
| 111052 | Heriot | Sandra | F | Victoria | AU | 2 | Surf Coast Century 100km 2025 (17 hours) |
| 123946 | Herman | Devon | F | BC | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 109312 | Hermann | Andre | M | Texas | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 121889 | Hermet | Anthony | M | Ile de France | FR | 2 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 112542 | Hernández | Adriana | F | San José | CR | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 101067 | Hernandez | Andres | M | PA | US | 2 | Massanutten 100M 2025 (36 hours) † |
| 100050 | Hernandez | Froilan | M | CA | US | 16 | Pine to Palm 100M 2025 (34 hours) † |
| 123889 | Hernandez | Salley | F | Kentucky | US | 1 | Sedona Canyons 125M 2025 (52 hours) |
| 124786 | Hernandez | Sarah | F | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 125693 | Hernandez | Scott | M | Maryland | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 119710 | Hernández Domenech | Julio David | M | Alicante | ES | 2 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 122496 | Herrema | David | M | MI | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 125044 | Herrera | Isaac | M | IL | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 121675 | Herring | Ryan | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 102322 | Herrington | Bobby | M | NC | US | 32 | Grindstone by UTMB 100km 2025 (18 hours) |
| 126109 | Herrmann | Jeremy | M | WI | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 120039 | HERRMANN | OLIVER DAVID | M | Bern | CH | 2 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 126124 | Herrmann | Rob | M | MT | US | 1 | Crazy Mountain 100M 2025 (36 hours) † |
| 121252 | HERROUIN | YANN | M | VAL DE MARNE | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 115873 | Herson | Taylor | M | OR | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 125120 | Herter | Michael | M | MI | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 124394 | Herzog | Ryan | M | CO | US | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 110924 | Herzog | TJ | M | CA | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 109055 | Heslop | Claire | F | ON | CA | 16 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 119982 | Hess | Austin | M | PA | US | 2 | Hellbender 100M 2025 (40 hours) † |
| 105002 | Hess | Brian | M | WY | US | 8 | Bighorn 100M 2025 (35 hours) |
| 121416 | Hessling | Brendan | M | MI | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 116317 | Hester | Natalia | F | Florida | US | 4 | Umstead 100M 2025 (30 hours) |
| 117844 | Hetmanski | Adam | M | Wolfsbank 3 | DE | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125658 | Hetreed | Olivia | F | London | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 109236 | Hetrick | Chad | M | OK | US | 16 | Leadville Trail 100M 2025 (30 hours) |
| 123438 | Heulin | Gael | M | Haute Savoie | FR | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 127827 | Heuwagen | Steve | M | MI | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 104673 | Heuze | Franck | M | FRA | FR | 16 | Hardrock 100M 2025 (48 hours) † |
| 104754 | Heward | Sam | M | GBR | GB | 16 | Swiss Alps 100km 2025 (22 hours) |
| 116061 | Hewett | Alec | M | Colorado | US | 2 | Tahoe 202M 2025 (100 hours) † |
| 125324 | Hewitt | Chris | M | CO | US | 1 | Moab 238M 2025 (108 hours) † |
| 118245 | Hewitt | Greg | M | Utah | US | 4 | Wasatch Front 100M 2025 (36 hours) † |
| 112985 | Hewitt | Ivor | M | Surrey | GB | 1 | Autumn 100M 2025 (28 hours) |
| 123825 | Hewson | Robin | M | Rhode Island | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 103847 | Heyboer | James Peter | M | MI | US | 64 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 108965 | Heymann | Rebecca | F | CA | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 122527 | Heyse | Andrea | F | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 100993 | Hiatt | Joseph | M | NC | US | 4 | Vermont 100M 2025 (30 hours) |
| 117495 | Hibayashi | Keisuke | M | Tokyo | JP | 1 | OSJ Ontake 100km 2025 (20 hours) |
| 111834 | Hibbard | Travis | M | MN | US | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 122296 | HIBBERT | Nicola | F | Western Australia | AU | 2 | Guzzler Ultra 100km 2025 (24 hours) |
| 103514 | Hickman | Clay | M | TN | US | 32 | IMTUF 100M 2025 (36 hours) † |
| 124365 | Hickman | Jeff | M | TN | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 100739 | Hickok | Benny | M | IN | US | 512 | Indiana 100M 2025 (30 hours) |
| 108991 | Hickory | McKendree | F | Colorado | US | 8 | Run Rabbit Run 100M 2025 (36 hours) † |
| 124066 | Hicks | Catherine | F | Berkshire | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 103190 | Hidaka | Yuichiro | M | Rhode Island | US | 1 | Western States 100M 2025 (30 hours) † |
| 124742 | HIDALGO | FRANCISCO | M | San José | CR | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 103824 | Hielscher | Wolfgang | M | DEU | DE | 32 | Autumn 100M 2025 (28 hours) |
| 126742 | Hiesberger | Karl | M | Noe | AT | 1 | Ultra Trail Vipava Valley 106km 2025 (25 hours) |
| 110786 | Higgins | Andrew | M | Alabama | US | 16 | High Lonesome 100M 2025 (37 hours) |
| 123726 | Higgins | Arabelle | F | GA | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 109257 | Higgins | Devin | M | CA | US | 16 | Hood Hundred 100M 2025 (34 hours) |
| 102189 | Higgins | Laurie | F | OR | US | 64 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 109756 | Higgins | Nathan | M | MN | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 100560 | Higgins | Richard | M | GA | US | 32 | Yeti Virginia 100M 2025 (30 hours) † |
| 127550 | Hignell | Josh | M | Bristol | GB | 1 | Autumn 100M 2025 (28 hours) |
| 121074 | Hignite | Andy | M | HI | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 117129 | Higo | Masashi | M | Nagano | JP | 4 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 125869 | Higuchi | Miki | F | Ca | US | 1 | Javelina Jundred 100M 2025 (30 hours) |
| 123755 | Higueras | Luis Felipe | M | Lima | PE | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 101520 | Hihnala | Heikki | M | FIN | FI | 16 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 107312 | Hilback | Daniel | M | MN | US | 16 | Superior 100M 2025 (38 hours) † |
| 122793 | Hildahl | Conner | M | Ontario | CA | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 103988 | Hildreth | Brian | M | CA | US | 128 | Cuyamaca 100km 2025 (17 hours) † |
| 116988 | Hildrew | Christopher | M | Tasmania | AU | 4 | Tarawera by UTMB 102km 2025 (17 hours) |
| 111054 | Hill | Austin | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 103830 | Hill | Brian | M | TX | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 100880 | Hill | Brian | M | CO | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 124858 | Hill | Cameron | M | TN | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 107555 | Hill | Dan | M | NM | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 122651 | Hill | Emily | F | Texas | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 101742 | Hill | Garren | M | TX | US | 128 | Black Canyon 100km 2025 (17 hours) † |
| 120565 | HILL | HAROLD | M | North Carolina | US | 2 | Eastern States 100M 2025 (36 hours) |
| 125808 | Hill | Jackie | F | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 125474 | Hill | Jacquie | F | BC | CA | 1 | Fat Dog 120M 2025 (48 hours) † |
| 124465 | Hill | Jake | M | Greater London | GB | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 125590 | Hill | Jenny | F | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 114386 | Hill | Mike | M | OH | US | 4 | No Business 100M 2025 (34 hours) |
| 100236 | Hill | Nicholas | M | NJ | US | 1 | Western States 100M 2025 (30 hours) † |
| 126510 | Hill | Nick | M | TN | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 116267 | Hill | Nigel | M | Victoria | AU | 2 | Buffalo Stampede 100km 2025 (23 hours) |
| 126956 | Hill | Ryan | M | British Columbia | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 125490 | Hill | Shane | M | WA | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 118076 | Hill | Stephanie | F | VA | US | 2 | Hellbender 100M 2025 (40 hours) † |
| 111393 | Hill | Zachary | F | NM | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 118192 | Hillebrand | Chris | M | NM | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 124312 | Hillers | Amy | F | CO | US | 1 | Never Summer 100km 2025 (23 hours) |
| 120895 | Hilton | Nick | M | AZ | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 107598 | Hilty | Blake | M | Washington | US | 16 | Javelina Jundred 100M 2025 (30 hours) |
| 113198 | Himbert | Caroline | F | Utah | US | 8 | Beaverhead 100km 2025 (20 hours) |
| 119082 | Himuro | Michiko | F | JPN | JP | 2 | Lake Biwa 100M 2025 (52 hours) |
| 124428 | Hincapie Castillo | Juan | M | North Carolina | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 115169 | Hinds | Gareth | M | Tasmania | AU | 2 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 125233 | Hine | Reuben | M | VA | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 108177 | Hinely | Jill | F | South Carolina | US | 1 | Western States 100M 2025 (30 hours) † |
| 112531 | Hinely | Ken | M | SC | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 127473 | Hinerman | Josh | M | Wv | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 114772 | Hines | Max | M | New York | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 123460 | Hines | Wes | M | OR | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 102004 | Hinesly | Jace | M | OR | US | 4 | Pine to Palm 100M 2025 (34 hours) † |
| 114215 | Hinkel | Stephen | M | Colorado | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 103301 | Hinkle | Carolyn | F | OH | US | 4 | Twisted Branch 100km 2025 (20 hours) † |
| 111541 | Hinojosa | Nicolas | M | Buenos Aires | AR | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 108155 | Hinse | Guillaume | M | Quebec | US | 8 | Grindstone by UTMB 100M 2025 (36 hours) |
| 116786 | Hinte-Rogers | Shelby | F | CA | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 101322 | Hiom | Grace | F | BC | CA | 16 | Lost Soul Ultra 100km 2025 (21 hours) |
| 101103 | Hiom | Phil | M | BC | CA | 32 | Canadian Death Race 118km 2025 (24 hours) |
| 125130 | Hipszer | Sandra | F | MD | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 127725 | HIRANO | TOSHIHIKO | M | Tokyo | JP | 1 | FunTrails Chichibu & Okumusashi 105km 2024 (30 hours) |
| 120115 | HIROZUMI | ITO | M | Chiba | JP | 2 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 127149 | Hirsch | Maximilian | M | Zurich | CH | 1 | Mallorca by UTMB: Serra de Tramuntana (SDT) 135km 2025 (30 hours) |
| 117400 | Hirst | Justin | M | PA | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 113212 | Hirvela | Jeff | M | TX | US | 8 | Bigfoot 206M 2025 (100 hours) † |
| 125531 | Hiskey | Scott | M | Washington | US | 1 | Moab 238M 2025 (108 hours) † |
| 104216 | Hites | Jared | M | OH | US | 32 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 121608 | Hitt | Taylor | M | GA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 127711 | Hixon | Craig | M | Pennsylvania | US | 1 | Rabid Raccoon 100km 2025 (22 hours) |
| 123741 | Hixon | Kevin | M | Pennsylvania | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 105733 | Hlasney | Todd | M | KS | US | 32 | Run Rabbit Run 100M 2025 (36 hours) |
| 119530 | Hnat | John | M | OH | US | 2 | Canal Corridor 100M 2025 (30 hours) † |
| 125432 | Ho | Ashleigh | F | VA | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 115773 | Ho | Michelle | F | CA | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 119619 | Hoang | Song | M | Ho Chi Minh | VN | 1 | HOKA Chiang Mai Thailand by UTMB Trans-Int 160 175km 2024 (48 hours) |
| 115178 | Hoang Huu | Thang | M | Ha Noi | VN | 2 | HOKA Chiang Mai Thailand by UTMB Trans-Int 160 175km 2024 (48 hours) |
| 106853 | Hobbs | Hayden | M | 8 | Ultra-Trail Cape Town 100M 2024 (45 hours) | ||
| 100275 | Hoberg | Scott | M | MN | US | 4 | Superior 100M 2025 (38 hours) † |
| 126201 | Hobsbawn | Dailyn | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 108987 | Hobson | Dylan | M | Idaho | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 125846 | Hobson | Leanna | F | WV | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 123301 | Hochman | Amit | M | Isr | IL | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 116876 | Hockensmith | Lucas | M | PA | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 112527 | HOCKRIDGE | STUART | M | AZ | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 121682 | Hodgdon | Renee | F | MT | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 113139 | Hodgens | Nathan | M | California | US | 8 | Quebec Mega Trail 135km 2025 (32 hours) |
| 113580 | Hodgens | Ryan | M | Pa | US | 4 | Eastern States 100M 2025 (36 hours) |
| 124516 | Hodges | Nathan | M | Tennessee | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 123873 | Hodgson | Eric | M | Utah | US | 1 | Bighorn 100M 2025 (35 hours) |
| 123717 | Hodum | Tiffany | F | PA | US | 1 | Eastern States 100M 2025 (36 hours) |
| 112596 | Hoeffner | Kai | M | MA | US | 8 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 124276 | Hoeft | Ryan | M | Colorado | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 118314 | Hoehn | Cassidy | M | California | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 125199 | Hoeing | Jordan | M | IN | US | 1 | Indiana 100M 2025 (30 hours) |
| 126565 | Hoeveler | Kerry | F | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 102153 | Hofacker | Charles | M | CA | US | 4 | Tahoe 202M 2025 (100 hours) |
| 126006 | Hofeditz | Andre | M | Baden-Württemberg | DE | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 117219 | Hofer | Star | F | Ontario | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 118728 | Hoffard | Jeff | M | Queensland | AU | 4 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 120234 | Hoffman | Adam | M | MA | US | 2 | Mohican 100M 2025 (32 hours) |
| 115790 | Hoffman | Andrew | M | CO | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 127198 | Hoffman | Cole | M | Colorado | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 111368 | Hoffman | David | U | CZ | CZ | 2 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 124950 | Hoffman | Jeff | M | KY | US | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 124100 | Hoffman | Jenny | F | MA | US | 1 | Vermont 100M 2025 (30 hours) |
| 100466 | Hoffman | Keith | M | CT | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 100562 | Hoffman | Kip | M | PA | US | 32 | Twisted Branch 100km 2025 (20 hours) † |
| 123814 | Hoffman | Laura | F | KY | US | 1 | No Business 100M 2025 (34 hours) |
| 123736 | Hoffmann | Ellen | F | BC | CA | 1 | Zion 100km 2025 (19 hours) |
| 124608 | hoffmann | robert | M | WI | US | 1 | Superior 100M 2025 (38 hours) † |
| 121673 | Hofleitner | Aude | F | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 123567 | Hofmann | James | M | TX | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 125648 | Hofmann | Josef | M | Thuringia | DE | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 127310 | Hofmann | Juliane | F | Germany | DE | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 109273 | Hofmann | Michael | M | WV | US | 8 | IMTUF 100M 2025 (36 hours) † |
| 127759 | Hofmeister | Gregor | M | Bavaria | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 123327 | Hogan | Gregory | M | MD | US | 2 | C & O Canal 100M 2025 (30 hours) † |
| 119074 | Hogan | Isaac | M | NSW | AU | 4 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 113033 | Hogan | Kelsey | F | Newfoundland | CA | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 113450 | Hogan | Shannon | F | WI | US | 8 | Superior 100M 2025 (38 hours) † |
| 111644 | Hogben | Ryan | M | 74310 | FR | 8 | Autumn 100M 2025 (28 hours) |
| 102354 | Hohman | Rick | M | OH | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 115023 | Hokenson | Nathan | M | CO | US | 4 | Never Summer 100km 2025 (23 hours) |
| 124504 | Holcomb | Benjamin | M | MI | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 118441 | Holcomb | Lucas | M | Pennsylvania | US | 2 | No Business 100M 2025 (34 hours) |
| 100595 | Holcomb | Mark | M | IL | US | 16 | Bear, The 100M 2025 (36 hours) † |
| 113384 | Holcombe | Russell | M | GA | US | 8 | Cruel Jewel 106M 2025 (48 hours) † |
| 108955 | Holdaway | Jeffrey | M | Utah | US | 2 | Tahoe 202M 2025 (100 hours) † |
| 126958 | Holden | Gregory | M | NY | US | 1 | Vermont 100M 2025 (30 hours) |
| 107158 | Holer | Joshua | M | CO | US | 4 | Zion 100km 2025 (19 hours) |
| 119627 | Holgerson | Ryan | M | Pennsylvania | US | 2 | No Business 100M 2025 (34 hours) |
| 127796 | Holiday | Jonathan | M | GA | US | 1 | Long Haul 100M 2025 (30 hours) |
| 105116 | Holk | James | M | OR | US | 64 | Cascade Crest 100M 2025 (34 hours) |
| 111200 | Holl | Gernot | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 124586 | Holladay | Lincoln | M | Idaho | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 102334 | Holland | Karen | F | ON | CA | 8 | Sulphur Springs 100km 2025 (18 hours) |
| 121201 | Holland | Mariah | F | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 124554 | Holland | Wallace | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 126103 | Holle | Maxwell | M | Virginia | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 121689 | Hollenbaugh | Rick | M | MT | US | 2 | Vermont 100M 2025 (30 hours) |
| 125833 | Hollenbeck | Jake | M | NC | US | 1 | Umstead 100M 2025 (30 hours) |
| 125812 | Holley | Ellen | F | Idaho | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 127182 | Holliday | Adam | M | California | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123843 | Holling | Seth | N | NC | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 106855 | Hollister | Scott | M | CO | US | 128 | Run Rabbit Run 100M 2025 (36 hours) |
| 123908 | Holloway | Jenny | F | Kuala Lumpur | MY | 1 | Trail des Gombak 100km 2025 (30 hours) |
| 124184 | Holloway | Tim | M | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 123886 | Holloway | Zachary | M | Oregon | US | 1 | Waldo 100km 2025 (18 hours) † |
| 126709 | Holman | Catherine | F | MA | US | 1 | Vermont 100M 2025 (30 hours) |
| 118781 | Holman | Emma | F | New South Wales | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 119384 | Holman | Joshua | M | GBR | GB | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 118374 | Holmes | Holly | F | cornwall | GB | 4 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 126940 | Holmes | James | M | Devon | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 106432 | Holmes | Joshua | M | CA | US | 128 | Tunnel Hill 100M 2024 (30 hours) † |
| 101685 | Holmes | Mandie | F | CA | US | 4 | Twisted Branch 100km 2025 (20 hours) † |
| 124766 | Holmes | Steven | M | CA | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 127461 | Holmes | Travis | M | TX | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 110361 | Holmstrup | Jens | M | Gentofte | DK | 16 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 115347 | Holmstrup | Mads | M | Gentofte | DK | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 127431 | Holoubek | Tomas | M | CZE | CZ | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 127673 | Holsomback | JT | M | Texas | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 107242 | Holt | Jaime | F | AL | US | 16 | Canyons by UTMB 100M 2025 (35 hours) |
| 124954 | Holzgang | Harrison | M | Oregon | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 124645 | Homann Hrycyna | Gustavo | M | São Paulo | BR | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125600 | Homler | Emily | F | Texas | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 124288 | Homyk | Kelsey | F | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 124705 | Honeycutt | Jessica | F | MD | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 118346 | HONG | JONGHEE | M | gyeonggi-do | KR | 2 | HOKA Chiang Mai Thailand by UTMB Trans-Int 160 175km 2024 (48 hours) |
| 124686 | Hong | Julie | F | NY | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 125379 | Hongne | Stefan | M | Hainaut | BE | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127338 | Hood | Cassidy | M | ID | US | 1 | Saddles 100M 2025 (34 hours) † |
| 123753 | Hoogland | Steve | M | Texas | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 123262 | HOOPER | STEVEN | M | UT | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 127038 | Hoover | Randy | M | SD | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 124910 | Hoover | Scott | M | FL | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 111133 | Hope | Owen | M | BC | CA | 8 | Cascade Crest 100M 2025 (34 hours) |
| 120622 | Hopkins | Daniel | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126645 | Hopman | Erica | F | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 119294 | Hoppe | Daniel | M | Lower Saxony | DE | 2 | Mozart by UTMB 119km 2025 (23 hours) |
| 107285 | Hopper | Dan | M | OH | US | 8 | Leadville Trail 100M 2025 (30 hours) |
| 102178 | Hopper | David | M | OR | US | 1 | Western States 100M 2025 (30 hours) † |
| 123775 | Hopping | Daniel | M | IL | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 125013 | Horak | Jace | M | Colorado | US | 1 | Never Summer 100km 2025 (23 hours) |
| 102478 | Horan | Pete | M | FL | US | 128 | Black Canyon 100km 2025 (17 hours) † |
| 123816 | Horgan | Olivia | F | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 112602 | Hori | Yasuaki | M | Tokyo | JP | 8 | SkyView Ultra Trail 140km 2025 (34 hours) |
| 124103 | Horlacher | Gregory | M | TX | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 126038 | Hormann | Rebecca | F | Manchester | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 106203 | Horn | Crista | F | MD | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 113144 | Hornak | Peter | M | Slovakia | SK | 8 | Tuscany Crossing 103km 2025 (21 hours) |
| 110143 | Horner | John | M | NC | US | 4 | Georgia Death Race 74M 2025 (24 hours) † |
| 102488 | Hornig | Brett | M | OR | US | 4 | Pine to Palm 100M 2025 (34 hours) † |
| 120557 | Horning | Greg | M | MD | US | 2 | Laurel Highlands 70.5M 2025 (20 hours) |
| 112207 | Horowitz | Taylor | M | CO | US | 2 | San Diego 100M 2025 (32 hours) † |
| 119351 | Horton | Joshua | M | KY | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 123658 | Horton | Rick | M | New Hampshire | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 100333 | Horvath | Nicholas | M | TN | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 126178 | Hoseus | Ben | M | Kentucky | US | 1 | Ultra-Trail Cape Town 100M 2024 (45 hours) |
| 126371 | Hoskin | Nic | M | New South Wales | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 124709 | Hosking | Roger | M | YT | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 124012 | Hostetler | Trevor | M | Oregon | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 108370 | Hotaling | Grant | M | Ca | US | 16 | Run Rabbit Run 100M 2025 (36 hours) † |
| 125319 | hou | stephen | M | Utah | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 125161 | Houck | Shawn | M | WY | US | 1 | Bighorn 100M 2025 (35 hours) |
| 119458 | Houghton | James | M | Cheshire | GB | 2 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 101274 | Houghton | Rob | M | CA | US | 16 | Waldo 100km 2025 (18 hours) † |
| 123715 | Houlding | Helen | F | Lancashire | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 116758 | Hoult | Mark | M | NSW | AU | 4 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 124643 | Houng | Abraham | M | NJ | US | 1 | Canal Corridor 100M 2025 (30 hours) |
| 112725 | Houpert | Mathieu | M | Québec | CA | 2 | Moab 238M 2025 (108 hours) † |
| 122549 | Hourdebaigts | Maxime | M | France | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124551 | Hourigan | Deanna | F | KY | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 126399 | House | Gary | M | Wales | GB | 1 | Transgrancanaria 125km 2025 (28 hours) |
| 125077 | Houy | Milton | M | Louisiana | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 109744 | Houzé | Kelig | M | Rhone Alpes | FR | 4 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 117837 | Hovenga | Bard | M | CO | US | 2 | Bighorn 100M 2025 (35 hours) |
| 100331 | Howard | Amy | F | TX | US | 128 | Rocky Raccoon 100M 2025 (30 hours) |
| 100195 | Howard | Henry | M | IN | US | 16 | Burning River 100M 2025 (30 hours) |
| 111005 | Howard | Jim | M | California | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 125399 | Howe | Christopher | M | Surrey | GB | 1 | Thames Path 100M 2025 (30 hours) |
| 119766 | Howe | Olivia | F | Buckinghamshire | GB | 2 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 117402 | Howell | Kristian | M | CA | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 115535 | Howell | Laura | F | Colorado | US | 4 | Cascade Crest 100M 2025 (34 hours) |
| 100668 | Howell | Shannon | F | SC | US | 16 | Hellbender 100M 2025 (40 hours) † |
| 105074 | Howes | Jesse | M | CT | US | 32 | Vermont 100M 2025 (30 hours) |
| 107689 | Howland | Philip | M | UT | US | 16 | Hardrock 100M 2025 (48 hours) |
| 116132 | Howlett | Riley | N | BC | CA | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 126967 | Howley | Ian | M | AL | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 108388 | Howton | James | M | UT | US | 4 | Zion 100km 2025 (19 hours) |
| 123731 | Hoy | Melanie | F | PA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 101751 | Hoyer | Scott | M | BC | CA | 4 | Fat Dog 120M 2025 (48 hours) † |
| 122773 | Hrdina | Josef | M | Česká republika | CZ | 2 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125370 | Hrnčíř | Tomáš | M | Czech republic | CZ | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 104110 | Hruska | Zdenek | M | CZE | CZ | 32 | Mozart by UTMB 119km 2025 (23 hours) |
| 119513 | Hryciw | Demyan | N | NJ | US | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 125950 | HSU | CHIN TING | F | Taiwan (R.O.C.) | TW | 1 | Formosa Trail 104km 2024 (28 hours) |
| 118473 | Hsu | Frances | F | OR | US | 4 | Waldo 100km 2025 (18 hours) † |
| 102052 | Hsueh | Jack | M | CA | US | 16 | Wasatch Front 100M 2025 (36 hours) † |
| 116251 | Hu | Baron | M | CA | US | 4 | Bear, The 100M 2025 (36 hours) † |
| 127877 | HU | JIN | M | Jiangsu | CN | 1 | Chiangmai by UTMB Elephant 100km 2024 (22 hours) |
| 124138 | Hu | Lucy | F | PA | US | 1 | Cruel Jewel 106M 2025 (48 hours) † |
| 117972 | Hu | Rong | F | NJ | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 125882 | Hu | Wei | M | WI | US | 1 | Kettle Moraine 100M 2025 (30 hours) |
| 123480 | Huang | Andy | M | CA | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 111441 | Huang | Edi | M | Singapore | SG | 4 | Hong Kong 100K 100km 2025 (23 hours) |
| 110533 | Huang | Erxiong | M | CA | US | 16 | Bear, The 100M 2025 (36 hours) † |
| 109059 | Huang | Helen | F | NY | US | 8 | Twisted Branch 100km 2025 (20 hours) † |
| 105395 | Huang | Hongguo | M | CHN | CN | 8 | Mt Fuji 100M 2025 (46 hours) |
| 125871 | huang | jianing | F | beijing | CN | 1 | Ninghai Ultra Trail 109km 2025 (24 hours) |
| 127817 | huang | jiayi | M | jiangsu | CN | 1 | Ninghai Ultra Trail 109km 2025 (24 hours) |
| 119501 | Huang | Teng | M | Chongqing | CN | 2 | Ninghai Ultra Trail 109km 2025 (24 hours) |
| 125743 | Huang | Vivian | F | NY | US | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 126937 | Hubert | William | M | HI | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 112564 | Hubsher | Chad | M | Florida | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 109342 | Huchingson | Jim | M | CA | US | 16 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 126192 | Huckaby | Alicia | F | Ohio | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 126193 | Huckaby | Nick | M | Ohio | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 110381 | Hudelson | Snowbeard | M | CA | US | 16 | Rio Del Lago 100M 2025 (30 hours) |
| 124817 | Hudgins | Jacob | M | TX | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 117336 | Hudson | Eric | M | Tennessee | US | 4 | Hellbender 100M 2025 (40 hours) |
| 102411 | Hudson | Jill | F | WA | US | 16 | C & O Canal 100M 2025 (30 hours) † |
| 111324 | Hudson | John | M | CA | US | 8 | Rio Del Lago 100M 2025 (30 hours) |
| 124250 | Hudson | Kayli | F | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 115946 | Huebner | Sarah | F | TN | US | 4 | Vermont 100M 2025 (30 hours) |
| 116764 | Huerta | Efrain | M | IL | US | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 117980 | Huet | Laura | F | Haute Savoie | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124871 | Huezo | Luis | M | VA | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 127296 | Huff | Justin | M | Washington | US | 1 | Mountain Lakes 100M 2025 (30 hours) † |
| 120862 | Huff | Nathan | M | CO | US | 2 | Run Rabbit Run 100M 2025 (36 hours) † |
| 126446 | Huff | Rebekah | F | Indiana | US | 1 | Indiana 100M 2025 (30 hours) |
| 106377 | Huffman | Larry | M | VA | US | 8 | Massanutten 100M 2025 (36 hours) † |
| 122914 | Huffman | Scott | M | California | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 105015 | Hufschmidt | Laura | F | MI | US | 64 | Canal Corridor 100M 2025 (30 hours) |
| 102858 | Huget | Jeff | M | CA | US | 32 | Quicksilver 100km 2025 (17 hours) † |
| 104084 | Huggins | Heather | F | CA | US | 256 | Leona Divide 100km 2025 (17 hours) |
| 123162 | Hughes | Adam | M | Texas | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 108668 | Hughes | Adam | M | MI | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 122553 | Hughes | Chris | M | Cheshire | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 116060 | Hughes | Connor | M | CA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 108336 | Hughes | Dan | M | MI | US | 16 | Hellbender 100M 2025 (40 hours) † |
| 108711 | Hughes | Eamon | M | CO | US | 1 | Bighorn 100M 2025 (35 hours) |
| 127258 | Hughes | Hunter | M | South Carolina | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 114159 | Hughes | Jason | M | CA | US | 2 | Zion 100M 2025 (36 hours) † |
| 109170 | Hughes | Ken | M | Berkshire | GB | 16 | Thames Path 100M 2025 (30 hours) |
| 123791 | Hughes | Kevin | M | Norway | NO | 1 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 127448 | Hughes | Michael | M | WA | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 103880 | Hughes | Stuart | M | AUS | AU | 64 | Tarawera by UTMB 100M 2025 (36 hours) |
| 124960 | Hui | Hung Mui | F | CA | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 125791 | Hujs | Joe | M | New South Wales | AU | 1 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 122918 | Hull | Justine | F | BC | CA | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 107204 | Hullermann | Tim | M | CO | US | 1 | Western States 100M 2025 (30 hours) † |
| 116177 | Hulsey | Joel | M | Colorado | US | 4 | Never Summer 100km 2025 (23 hours) |
| 119246 | Hult | Alex | M | OR | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 126491 | Humble | Sarah | F | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 103432 | Humenetskyj | Alexander | M | CA | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 102164 | Humenny | Patrick | M | BC | CA | 2 | Lost Soul Ultra 100km 2025 (21 hours) |
| 106346 | Humphrey | Sean | M | OH | US | 64 | Hellgate 100km 2024 (17 hours) |
| 121310 | Humphreys | Nathan | M | mid lothian | US | 2 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 125885 | Humphries | Cameron | M | Essex | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 112379 | Hungate | Scott | M | CO | US | 8 | Leadville Trail 100M 2025 (30 hours) |
| 116763 | Hunn | Eric | M | KS | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 125244 | Hunsberger | Katherine | F | MI | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 101347 | Hunsucker | Matthew | M | CO | US | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 100732 | Hunt | Jay | M | CO | US | 32 | Georgia Death Race 74M 2025 (24 hours) † |
| 116431 | Hunt | John-Paul | M | n/a | GB | 4 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 123549 | Hunt | Joshua | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 102674 | Hunt | Wesley | M | AR | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 120428 | Hunter | Alex | M | CA | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 101524 | Hunter | Jonathan | M | CA | US | 4 | Cuyamaca 100km 2025 (17 hours) † |
| 124472 | Hunter | Ryan | M | NH | US | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 122976 | Huntley | Kimberly | F | WI | US | 2 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 115775 | Huntzinger | Debbie | F | AZ | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 124375 | Hunyor | Jamie | M | California | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 126566 | Hurford | molly | F | ON | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 108876 | Huriez | Clément | M | Haute Savoie | FR | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 105892 | Hurley | Raymond | M | NV | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 105909 | Hurst | Brandon | M | TX | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 124001 | Hurst | Charlotte | F | Worcestershire | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 124789 | Hurst | Daniel | M | TN | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 107611 | Hurtado | Art | M | TX | US | 8 | Leadville Trail 100M 2025 (30 hours) |
| 125562 | Hussami | Ralph | M | Quebec | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 100239 | Husseini | Naji | M | NC | US | 32 | Crazy Mountain 100M 2025 (36 hours) † |
| 102366 | Huston | Scott | M | MN | US | 4 | Superior 100M 2025 (38 hours) † |
| 116002 | Hutcheson | David | M | NY | US | 4 | Massanutten 100M 2025 (36 hours) † |
| 124440 | Hutcheson | Luke | M | Western Australia | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 124821 | Hutchins | Daniel | M | VIC | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 117607 | Hutchison | Joel | M | Virginia | US | 4 | Bear, The 100M 2025 (36 hours) |
| 114117 | Hüttl | Adrian | M | Baden-Württemberg | DE | 2 | Swiss Alps 100km 2025 (22 hours) |
| 125499 | Huxtable | Corbin | M | Alberta | CA | 1 | Lost Soul Ultra 100km 2025 (21 hours) |
| 103128 | Huyett | Joe | M | CO | US | 32 | High Lonesome 100M 2025 (37 hours) |
| 115479 | Huzij | Frank | M | Niederösterreich | AT | 4 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 127210 | Hwong | Alison | F | CA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 125334 | Hyland | Patrick | M | NT | AU | 1 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 126628 | Hynes | Patrick | M | Victoria | AU | 1 | Malaysia Ultra Trail by UTMB 100km 2024 (26 hours) |
| 127349 | Hyslop | Chad | M | Arizona | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 105630 | Hyslop | Stuart | M | GBR | GB | 32 | SwissPeaks 100km 2025 (28 hours) |
| 120798 | HYUN | MIKI | M | HI | US | 2 | Transjeju by UTMB 150km 2025 (37 hours) |
| 117040 | Ibanez | Michael | M | IL | US | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 123734 | Ibbotson | Dan | M | Queensland | AU | 1 | Blackall 100km 2025 (18 hours) |
| 126717 | Ibrahim | Yusuf | M | Selangor | MY | 1 | Malaysia Ultra Trail by UTMB 100km 2024 (26 hours) |
| 117196 | Icardo | Xavier | M | Ontario | CA | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 127306 | Ichart | Edgar | M | Catalonia | ES | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 106273 | Ichido | Keisuke | M | JPN | JP | 8 | Istria by UTMB 168km 2025 (46 hours) |
| 100143 | Ickringill | David | M | ESP | ES | 4 | Thames Path 100M 2025 (30 hours) |
| 125085 | Ide | Matt | M | Washington | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 107286 | Ieuter | William | M | IL | US | 16 | Run Rabbit Run 100M 2025 (36 hours) |
| 101025 | Ihara | Tomokazu | M | JPN | JP | 4 | Massanutten 100M 2025 (36 hours) † |
| 117103 | Iijima | Yusuke | M | Tokyo | JP | 2 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 124559 | Ikäheimo | Jorma | M | Etela-Suomen Laani | FI | 1 | Nuts Ylläs Pallas 100km 2025 (22 hours) |
| 102046 | Ilagan | Gabby | M | BC | CA | 2 | Lost Soul Ultra 100km 2025 (21 hours) |
| 112122 | Ilagan | Tyller | M | Alberta | CA | 2 | Lost Soul Ultra 100M 2025 (33 hours) † |
| 125180 | Iman | Lindsey | F | Colorado | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 120469 | Imboden | Kate | F | California | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 103273 | Inanaga | Yusuke | M | JPN | JP | 16 | OSJ Ontake 100M 2025 (24 hours) |
| 123272 | Indrisevicius | Marius | M | QLD | AU | 2 | Guzzler Ultra 100km 2025 (24 hours) |
| 127527 | Ingoldsby | Brian | M | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 126258 | Ingram | Shaun | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 109459 | Innocenti | Mark | M | Hertfordshire | GB | 2 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 108681 | Inouye | Meggie | F | CA | US | 16 | Rio Del Lago 100M 2025 (30 hours) |
| 116015 | Inzaurralde | Gonzalo | M | Lavalleja | UY | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 120246 | Ionita | Alexandru | M | Schwyz | CH | 2 | Istria by UTMB 168km 2025 (46 hours) |
| 100718 | Iosa | Jeff | M | FL | US | 64 | Long Haul 100M 2025 (30 hours) † |
| 105441 | Ireland | Lee | M | GBR | GB | 8 | Lakeland 100M 2025 (40 hours) |
| 108365 | Irish | Jonathan | M | California | US | 2 | Wasatch Front 100M 2025 (36 hours) † |
| 116698 | Irizar | Guillermo | M | Buenos Aires | AR | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 108314 | Irons | Thomas | M | CA | US | 16 | Canyons by UTMB 100M 2025 (35 hours) |
| 126509 | Irvine | Angus | M | uk | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 124993 | Irving | Jordan | M | Conwy | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 100608 | Irving | Stephanie | F | WA | US | 256 | Black Canyon 100km 2025 (17 hours) † |
| 122144 | Irwin | Trent | M | NSW | AU | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 106865 | Ishiduka | Jiro | M | Kanagawa | JP | 16 | Arkansas Traveler 100M 2025 (30 hours) |
| 111276 | Ishii | shogo | M | Tokyo | JP | 4 | FunTrails Chichibu & Okumusashi 105km 2024 (30 hours) |
| 106202 | Ishikawa | Emari | F | JPN | JP | 2 | Okushinano 100km 2025 (21 hours) |
| 126041 | ISHIKAWA | HIROKI | M | Kanagawa | JP | 1 | Transjeju by UTMB 107km 2025 (25 hours) |
| 117729 | Ishikawa | Ryosuke | M | Aichi | JP | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 106867 | Isola | Leonardo | M | Salta | AR | 8 | Ultra Trail Amanecer Comechingón 120km 2025 (32 hours) |
| 115093 | Isom | Megan | F | CA | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 113836 | ISOMURA | Shinsuke | M | Kanagawa | JP | 8 | Hardrock 100M 2025 (48 hours) † |
| 100377 | Israel | Dean | M | AUS | AU | 1 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 122126 | Itabayashi | Yuki | M | Toyama | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 108882 | Ithurburn | Ashlie | F | AL | US | 8 | Mohican 100M 2025 (32 hours) |
| 122206 | Ito | Akira | M | SP | BR | 2 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 127801 | ITO | HIROAKI | M | 三重県 | JP | 1 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 111432 | Ito | Yuki | M | Hirakatashi | JP | 8 | Lake Biwa 100M 2025 (52 hours) |
| 127939 | Itoi | Shumpei | M | Kyoto | JP | 1 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 126357 | Iturbe | Agustin | M | Ontario | CA | 1 | Chiangmai by UTMB Elephant 100km 2024 (22 hours) |
| 127778 | Iushina | Antonina | F | Moscow | RU | 1 | HOKA Chiang Mai Thailand by UTMB Trans-Int 160 175km 2024 (48 hours) |
| 127717 | Ivan | Silva silva | M | Santa cruz | AR | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 124842 | Ivchenko | Oleg | M | BC | CA | 1 | Black Canyon 100km 2025 (17 hours) † |
| 123172 | Iverach | John | M | NSW | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 121447 | Iversen | Jonas Soleng | M | Oslo | NO | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 101612 | Ivie | Brian | M | CA | US | 4 | Cuyamaca 100km 2025 (17 hours) † |
| 103409 | Iwama | Hiroyuki | M | Yamanashi | JP | 32 | San Diego 100M 2025 (32 hours) † |
| 121261 | iwasaki | masaaki | M | Fukuoka | JP | 2 | Lake Biwa 100M 2025 (52 hours) |
| 115419 | Iwata | Shohei | M | Kyoto | JP | 2 | Lake Biwa 100M 2025 (52 hours) |
| 113589 | Iwatare | Shin | M | Tokyo | JP | 8 | Mt Fuji 100M 2025 (46 hours) |
| 115654 | Iyori | Makoto | M | 809,goji,yumesaki-cho | JP | 4 | OSJ Ontake 100km 2025 (20 hours) |
| 127543 | Ižip | Rastislav | M | Slovenská republika | SK | 1 | Javornika 105km 2025 (24 hours) |
| 123646 | Izquierdo | Cristian | M | Maule | CL | 1 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 120199 | Izzo | Paul | M | TX | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 126733 | Jabat | Keith | M | GA | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 122474 | Jablonski | Ed | M | Maryland | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 126887 | Jack | Arian | M | AL | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 111758 | jack | ian | M | London | GB | 4 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 125297 | Jackson | Alex | M | CO | US | 1 | Zion 100km 2025 (19 hours) |
| 124774 | Jackson | Andrew | M | NSW | AU | 1 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 110892 | Jackson | Chris | M | Nsw | AU | 8 | Buffalo Stampede 100km 2025 (23 hours) |
| 111955 | Jackson | Cody | M | WA | US | 1 | Western States 100M 2025 (30 hours) † |
| 116601 | Jackson | David | M | Massachusetts | US | 4 | Cruel Jewel 106M 2025 (48 hours) |
| 122388 | Jackson | Drew | M | AL | US | 2 | Pinhoti 100M 2025 (32 hours) † |
| 103271 | Jackson | Jacob | M | CA | US | 64 | San Diego 100M 2025 (32 hours) |
| 126876 | Jackson | James | M | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 114959 | Jackson | Jason | M | SD | US | 4 | Dinosaur Valley 100M 2024 (35 hours) † |
| 119912 | Jackson | Katti | F | NC | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 104971 | Jackson | Malcolm | M | NZL | NZ | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 108207 | Jackson | Matthew | M | AR | US | 16 | Arkansas Traveler 100M 2025 (30 hours) |
| 123425 | Jackson | Megan | F | Texas | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 111260 | Jackson | Paul | M | Flintshire | GB | 8 | Lakeland 100M 2025 (40 hours) |
| 123911 | Jackson | Shane | M | Worcestershire | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 101587 | Jackson | Steve | M | ON | CA | 8 | Sulphur Springs 100km 2025 (18 hours) |
| 121816 | Jackson | Tyler | M | VA | US | 2 | Bighorn 100M 2025 (35 hours) |
| 100063 | Jackson | William | M | WI | US | 2 | Tunnel Hill 100M 2024 (30 hours) |
| 123422 | Jacobs | Aimee | F | Texas | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 104879 | Jacobs | Anthony | M | ID | US | 32 | Beaverhead 100km 2025 (20 hours) |
| 120828 | Jacobs | Jan | M | Limburg | BE | 2 | Eiger Ultra Trail 250km 2025 (90 hours) |
| 103801 | Jacobs | Jill | F | MD | US | 2 | No Business 100M 2025 (34 hours) |
| 126752 | Jacobs | Rod | M | Colorado | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 101939 | Jacobs | Scotie | M | NY | US | 16 | Twisted Branch 100km 2025 (20 hours) † |
| 106868 | Jacobsen | Carsten | M | Randers | DK | 16 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 121835 | Jacobson | Brittney | F | OR | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 107211 | Jacobson | Ryan | M | FL | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 104029 | Jacobson | Sam | M | MN | US | 8 | Superior 100M 2025 (38 hours) |
| 127862 | Jacox | Jenny | F | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 124102 | Jacquemin | Benoit | M | Meurthe et Moselle | FR | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 124028 | JACQUES | Antoine | M | Alsace | FR | 1 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 103337 | Jacques | Monique | F | CA | US | 2 | Zion 100M 2025 (36 hours) † |
| 106519 | Jacquet | Jonas | M | DEU | DE | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 102201 | Jaegersen | Peter | M | OR | US | 32 | Georgia Death Race 74M 2025 (24 hours) † |
| 122448 | Jaffeux | Robin | M | GE | US | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 125676 | Jahan | Nicolas | M | Loire Atlantique | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 119813 | Jahnke | Patrick | M | North Rhine Wetsfalia | DE | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 122514 | Jain | Sumit | M | California | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 124127 | Jakob | Simon | M | Bayern | DE | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126519 | Jakober | Sarah | F | OR | US | 1 | Bighorn 100M 2025 (35 hours) |
| 121431 | Jakubík | Jaroslav | M | Slovakia | SK | 2 | Javornika 105km 2025 (24 hours) |
| 100158 | Jalmin | Loic | M | FRA | FR | 128 | Kerry Way Ultra 193km 2025 (40 hours) |
| 122746 | Jambor | Maxwell | M | QLD | AU | 2 | Mt Fuji 100M 2025 (46 hours) |
| 122435 | Jambou | Clement | M | HAUTE SAVOIE | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 113598 | James | Brian | M | North Carolina | US | 8 | Long Haul 100M 2025 (30 hours) † |
| 115858 | James | Caspian | M | Flintshire | GB | 2 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 126019 | James | Chandler | M | OR | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 124732 | James | Megan | F | AR | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 108511 | James | Michael | M | NSW | AU | 8 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 125662 | James | Sean | M | Maine | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 123932 | James | Tommy | M | Florida | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 127606 | Jamison | Jeff | M | Virginia | US | 1 | No Business 100M 2025 (34 hours) |
| 122605 | JAMOIS | Sébastien | M | Hérault | FR | 2 | Grand Raid Ventoux by UTMB 124km 2025 (30 hours) |
| 102249 | Janacek | Michal | M | N/A | CZ | 128 | Swiss Alps 100M 2025 (50 hours) |
| 122096 | Janardhanan | Shruti | F | California | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 113590 | Janaszak | Alisha | F | MN | US | 8 | Superior 100M 2025 (38 hours) † |
| 122342 | Janckila | Vaughn | M | Colorado | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 118340 | Jandering | Anders | M | Västra Götaland | SE | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 124398 | Janek | Tomas | M | Czech Republic | US | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 115003 | Jang | Youngcho | M | Danwon-gu | KR | 2 | Transjeju by UTMB 150km 2025 (37 hours) |
| 101489 | Janisch | Austin | M | CA | US | 32 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 117349 | Jankowski | John | M | CA | US | 4 | South Downs Way 100M 2025 (30 hours) |
| 122407 | Jankowski | Tony | M | CA | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 124153 | Jann | Christian | M | SC | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 112773 | Jannon | Eric | M | CA | US | 8 | Sean O'Brien 100km 2025 (17 hours) † |
| 125127 | Janosko | Kenneth | M | OH | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 126229 | Jans | Harmen | M | Limburg | BE | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 124568 | Jansen | David | M | Ontario | CA | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 126027 | Jansen | Lawrence | M | CA | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 111291 | Janulaitis | Lukas | M | NH | US | 8 | Swiss Alps 100M 2025 (50 hours) |
| 127084 | Jaouen | Maxime | M | France | US | 1 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 104565 | Jaqua | Nate | M | OR | US | 128 | HURT 100M 2025 (36 hours) |
| 125437 | Jardine | Jon-Erik | M | WA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 119479 | Jarema | Carl | M | MI | US | 2 | Hellbender 100M 2025 (40 hours) † |
| 120516 | Järn | Harry | M | Uusimaa | FI | 2 | Nuts Ylläs Pallas 160km 2025 (35 hours) |
| 112645 | Jaros | Todd | M | Ohio | US | 8 | Georgia Death Race 74M 2025 (24 hours) |
| 116864 | jarry | aurelien | M | qc | CA | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 126290 | Jarvis | Lee | M | VA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 116489 | Jaskiewicz | Erin | F | PA | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 126096 | Jaspers | Nic | M | NY | US | 1 | Vermont 100M 2025 (30 hours) |
| 123957 | Jaten | Rachel | F | Washington | US | 1 | Black Canyon 100km 2025 (17 hours) |
| 125537 | Jaunzems | Niks | M | Cesu | LV | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 127030 | Jaworski | Jonathan | M | AZ | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 102455 | Jay | Alyson | F | AZ | US | 16 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 101156 | Jay | Colleen | F | NC | US | 2 | Pinhoti 100M 2025 (32 hours) |
| 105524 | Jay | Luke | M | CO | US | 256 | High Lonesome 100M 2025 (37 hours) |
| 127853 | JAY | Romain | M | Luxembourg | LU | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 127542 | JEAN | Christophe | M | France | FR | 1 | Grossglockner UltraTrail 110km 2025 (28 hours) |
| 114796 | JEAN | DOMINIQUE | M | LOIRET | FR | 2 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 127901 | Jean-Philippe | Devaud | M | Vendée | US | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 126749 | Jedrzejczak | Wojciech | M | Lodz | PL | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 119913 | Jefferies | Adam | M | Ontario | CA | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 126793 | Jeffrey | Nick | M | WA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 122382 | Jeffs | Alexander | M | NC | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126032 | Jehl | John | M | IN | US | 1 | Indiana 100M 2025 (30 hours) |
| 111377 | Jemlich | Silke | F | Schleswig-Holstein | DE | 8 | Canyons by UTMB 100M 2025 (35 hours) |
| 124175 | Jenkins | Brian | M | KY | US | 1 | No Business 100M 2025 (34 hours) |
| 114800 | Jenkins | Paul | M | Denbighshire | GB | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 107292 | jenkins | scott | M | London | GB | 16 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 101134 | Jennings | Denzil | M | OR | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 112051 | Jennings | Mariela | F | California | US | 8 | HURT 100M 2025 (36 hours) † |
| 127469 | jennings | meaghan | F | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 121380 | Jennings | Megan | F | Oregon | US | 2 | Mountain Lakes 100M 2025 (30 hours) † |
| 113870 | Jennison | Erica | F | CA | US | 8 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 118121 | Jensen | Anne | F | UT | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 101686 | Jensen | Chris | M | CA | US | 16 | Leona Divide 100km 2025 (17 hours) |
| 119317 | Jensen | Daniel | M | IA | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 124746 | Jensen | Grant | M | California | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 113042 | jensen | jeff | M | ut | US | 8 | Pinhoti 100M 2025 (32 hours) † |
| 111253 | Jensen | Justin | M | ID | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 123904 | Jensen | Nora | F | PA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 125356 | Jensen | Stig Rune | M | - | NO | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 127629 | Jensen | Trevor | M | Arizona | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 121799 | Jenson | Cory | M | MN | US | 2 | Superior 100M 2025 (38 hours) |
| 126640 | JEONG | SEONGMIN | M | Jeollabuk-do province | KR | 1 | Ulju Trail Nine Peaks 128km 2025 (40 hours) |
| 125378 | Jerome | FERRERO | M | PACA 06 | FR | 1 | Gran Trail Courmayeur 100km 2025 (28 hours) |
| 107963 | Jesson | Maree | F | Northamptonshire | GB | 16 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 120236 | Jett | Drew | M | CT | US | 2 | Twisted Branch 100km 2025 (20 hours) |
| 111506 | Jevne | Jørgen | M | Oslo | NO | 4 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 123548 | Jewart | Ben | M | OR | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 127412 | Jewell | Connor | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 125924 | Jezek | Vojtech | M | Stredocesky Kraj | CZ | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 110307 | JI | Hang | M | Paris | FR | 4 | La Mision 160km 2025 (72 hours) |
| 126413 | JI | WEIGUANG | M | tianjin | CN | 1 | Nike ACG Ultra-Trail Chongli 100km 2025 (29 hours) |
| 107431 | Jia | Haiyan | M | CA | US | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 116217 | Jia | Weiping | M | Hessen | DE | 4 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 120068 | Jiang | Charles | M | Pennsylvania | US | 2 | Worlds End 100km 2025 (19 hours) |
| 114755 | Jiang | Nancy | F | Nelson | NZ | 1 | Western States 100M 2025 (30 hours) † |
| 123947 | Jilk | Tylor | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 127350 | Jimenez | Xavier | M | CA | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 105493 | Jiménez Roqhuett | Marcelo | M | CRI | CR | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 100599 | Jin | Ge | M | Beijing | CN | 32 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 113041 | Jing | Jian | M | CO | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 103520 | Jirak | Ales | M | Brandenburg | DE | 256 | Kerry Way Ultra 101km 2025 (20 hours) |
| 127812 | JO | GYEHOON | M | Gwangjin-gu | KR | 1 | Ulju Trail Nine Peaks 128km 2025 (40 hours) |
| 127391 | jo | sangho | M | Gyeonggi | KR | 1 | Nike ACG Ultra-Trail Chongli 168km 2025 (48 hours) |
| 127748 | JO | SANGMIN | M | seongdong-gu | KR | 1 | Transjeju by UTMB 150km 2025 (37 hours) |
| 102191 | Joao | Nadjala | F | BRA | BR | 16 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 117722 | Jodrey | Nora | F | MD | US | 2 | Cascade Crest 100M 2025 (34 hours) |
| 117254 | Joe | DeShawna | F | Utah | US | 4 | Bigfoot 206M 2025 (100 hours) |
| 105016 | Joens | Alexia | F | CA | US | 64 | Canyons by UTMB 104km 2025 (20 hours) |
| 114992 | Joffrain | Thierry | M | TX | US | 2 | Brazos Bend 100M 2024 (32 hours) |
| 115219 | Johan | Fernandez | M | Rhône Alpes | US | 4 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 103518 | Johannes | Sönke | M | CHE | CH | 32 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 109819 | Johannessen | Tom | M | *Ikke relevant | NO | 8 | Gran Trail Courmayeur 100km 2025 (28 hours) |
| 125478 | Johanns | Brandon | M | CO | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 127697 | Johanson | Jeremy | M | WA | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 108642 | Johansson | Johan | M | Skåne | SE | 4 | Thames Path 100M 2025 (30 hours) |
| 125512 | Johansson | Per | M | Scania | SE | 1 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 118273 | Johansson | Robert | M | Västmanland | US | 4 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 119249 | John | Matthew | M | West Yorkshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 125110 | Johner | Frederic | M | Bern | CH | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 110889 | johns | brinton | M | CO | US | 2 | Crazy Mountain 100M 2025 (36 hours) † |
| 126149 | Johnson | Amy | F | NC | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 107926 | Johnson | Andrew | M | Utah | US | 8 | Wasatch Front 100M 2025 (36 hours) † |
| 117620 | Johnson | Anne | F | CA | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 102312 | Johnson | Aron | F | MN | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 101257 | Johnson | Bertram | M | VT | US | 128 | Bighorn 100M 2025 (35 hours) |
| 126066 | Johnson | Brady | M | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 115327 | Johnson | Brandon | M | IN | US | 2 | Karkloof 100M 2025 (36 hours) |
| 115872 | Johnson | Brandon | M | GA | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 118611 | Johnson | Brenda | F | SC | US | 4 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 108431 | Johnson | Bridget | F | Wellington | NZ | 16 | Guzzler Ultra 100km 2025 (24 hours) |
| 112308 | Johnson | Carrie | F | CA | US | 2 | Angeles Crest 100M 2025 (36 hours) † |
| 125889 | Johnson | Christian | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 100574 | Johnson | Clint | M | GA | US | 32 | Georgia Death Race 74M 2025 (24 hours) † |
| 126484 | Johnson | Daniel | M | Alabama | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 126102 | Johnson | Eric | M | California | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 118713 | Johnson | Eric | M | ID | US | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 107696 | Johnson | Eric | M | Arizona | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 120972 | Johnson | Eric | M | California | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 121134 | Johnson | Eric | M | Minnesota | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 101465 | Johnson | Jaime | F | CA | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 125396 | Johnson | Jedd | N | QLD | AU | 1 | Blackall 100km 2025 (18 hours) |
| 126054 | Johnson | Jeff | M | ga | US | 1 | Georgia Death Race 74M 2025 (24 hours) |
| 112109 | Johnson | Jessi | F | MN | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 115482 | Johnson | Jessica | F | London | GB | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 118658 | johnson | joshua | M | INDIANA | US | 2 | Hellbender 100M 2025 (40 hours) † |
| 112761 | Johnson | Katelyn | F | CO | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 121136 | Johnson | Kevin | M | Ca | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127961 | Johnson | Kristen | F | Ontario | CA | 1 | Black Canyon 100km 2025 (17 hours) † |
| 123724 | Johnson | Lucas | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 108499 | Johnson | Mark | M | MN | US | 16 | Superior 100M 2025 (38 hours) † |
| 120595 | johnson | maxie | M | NV | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 115945 | Johnson | Melissa | F | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 124693 | Johnson | Noah | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 102032 | Johnson | Patrick | M | ND | US | 32 | Javelina Jundred 100M 2025 (30 hours) † |
| 101733 | Johnson | Paul | M | MI | US | 16 | Cocodona 250M 2025 (125 hours) |
| 122568 | Johnson | Richard | M | Western Cape | ZA | 2 | SkyRun 100km 2024 (28 hours) |
| 102514 | Johnson | Shelby | F | CA | US | 32 | Hardrock 100M 2025 (48 hours) † |
| 125630 | johnson | suzanne | F | bc | CA | 1 | Hood Hundred 100M 2025 (34 hours) |
| 123356 | Johnson | Thomas | M | HI | US | 2 | HURT 100M 2025 (36 hours) † |
| 113404 | johnson | trevor | M | ca | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 113336 | Johnson | Tyler | M | Colorado | US | 4 | Hennepin 100M 2025 (30 hours) † |
| 126042 | Johnson | Vic | M | UT | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 102817 | Johnson | Warren | M | FL | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 125483 | Johnson | Will | M | Colorado | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 127079 | Johnson | Zachary | M | WY | US | 1 | Never Summer 100km 2025 (23 hours) |
| 126129 | Johnson | Zachary | M | Utah | US | 1 | Moab 238M 2025 (108 hours) † |
| 117267 | Johnston | Alexa | F | BC | CA | 2 | Fat Dog 120M 2025 (48 hours) † |
| 124818 | Johnston | Luke | M | British Columbia | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 123848 | Johnston | Roman | M | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 115555 | Johnston | Sydney | F | Colorado | US | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 125875 | Johnstone | Shane | M | WA | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 120690 | Joines | Rob | M | Surrey | GB | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 115517 | Jokano | Urko | M | Gipuzkoa | ES | 2 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 106101 | Jolie | Mike | M | AB | CA | 8 | Tarawera by UTMB 102km 2025 (17 hours) |
| 116789 | Jolliffe | Max | M | CA | US | 4 | Angeles Crest 100M 2025 (36 hours) † |
| 114060 | Jonáš | Richard | M | Bratislava | SK | 8 | Mozart by UTMB 119km 2025 (23 hours) |
| 124710 | Jones | Anna | F | Utah | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 124765 | Jones | Bleddyn | M | Caerphilly | GB | 1 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 127170 | Jones | Carl | M | MS | US | 1 | Mamba 100M 2024 (34 hours) † |
| 104094 | Jones | Chris | M | CA | US | 128 | Pine to Palm 100M 2025 (34 hours) † |
| 111373 | Jones | Colby | M | Wa | US | 8 | Hood Hundred 100M 2025 (34 hours) |
| 124652 | Jones | Cole | M | Tx | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 125968 | Jones | David | M | Dorset | GB | 1 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 121653 | Jones | David | M | Wiltshire | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 116396 | Jones | David | M | HIGHLANDS | GB | 4 | South Downs Way 100M 2025 (30 hours) |
| 100131 | Jones | Dick | M | GBR | GB | 8 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 105423 | Jones | Dominic | M | GBR | GB | 64 | Grossglockner UltraTrail 110km 2025 (28 hours) |
| 111809 | Jones | Doug | M | MD | US | 8 | Kettle Moraine 100M 2025 (30 hours) † |
| 115179 | Jones | Dylan | M | California | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 119801 | Jones | Gareth | M | Rhondda Cynon Taf | GB | 2 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 123151 | Jones | Harry | M | Cardiff | GB | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 121730 | Jones | Ian | M | California | US | 2 | Tahoe 202M 2025 (100 hours) † |
| 119329 | Jones | Kade | M | UT | US | 2 | Zion 100km 2025 (19 hours) |
| 112194 | Jones | Kenny | M | UT | US | 1 | Western States 100M 2025 (30 hours) † |
| 124435 | Jones | Kris | M | Tennessee | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 113949 | jones | kyle | M | co | US | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 100307 | Jones | Lauren | F | GA | US | 4 | Tahoe 202M 2025 (100 hours) † |
| 103171 | Jones | Lyn | M | ON | CA | 128 | Sulphur Springs 100km 2025 (18 hours) |
| 120429 | Jones | Matt | M | CA | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 112802 | Jones | Matthew | M | WI | US | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124971 | Jones | Micha | M | Texas | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 108881 | Jones | Michael | M | VA | US | 4 | Laurel Highlands 70.5M 2025 (20 hours) |
| 116664 | jones | neil | M | Bc | CA | 4 | Fat Dog 100km 2025 (24 hours) |
| 120892 | Jones | Nelson | M | CO | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 119391 | Jones | Paul | M | Ohio | US | 1 | Canal Corridor 100M 2025 (30 hours) |
| 108229 | Jones | Rebecca | F | TN | US | 4 | Cruel Jewel 106M 2025 (48 hours) † |
| 124218 | Jones | Serena | F | OH | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 124281 | Jones | Sophia | F | KS | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 123944 | Jones | Thomas | M | american samoa | AS | 1 | Eastern States 100M 2025 (36 hours) |
| 125809 | Jones | Travis | M | Alberta | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 107374 | Jones | Will | M | Tn | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 101352 | Jonson | Kristoffer | M | WA | US | 8 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 110028 | Jónsson | Jón | M | Reykjavík | IS | 16 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 122528 | Jönsson | Niklas | M | Västra Götaland | SE | 2 | Dalmacija Ultra Trail 122km 2025 (32 hours) |
| 118328 | Jonsson | Thomas | M | Jämtland | SE | 2 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 116374 | Jonsson | Thomas | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 125728 | Jonval | Maxime | M | Marne | FR | 1 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 124299 | Jordan | Bryant | M | UT | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 124729 | Jordan | Cody | M | California | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 102154 | Jordan | Ethan | M | OR | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 104475 | Jordan | Jeffrey | M | TN | US | 2 | Dinosaur Valley 100km 2024 (22 hours) |
| 109633 | Jordan | Josh | M | WI | US | 8 | Crazy Mountain 100M 2025 (36 hours) † |
| 111972 | Jordan | Kevin | M | VA | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 124054 | Jordan | Matthew | M | Essex | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 111729 | Jorgensen | Bret | M | WA | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 118102 | Josefsson | Jenny | F | Stockholm | SE | 4 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 125973 | Josefsson | Marcus | M | Vallentuna | SE | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 126099 | Joseph | Olivia | F | OH | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 127977 | Joshi | Bal | M | TX | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 110209 | Joshi | Piyush | M | Washington | US | 16 | San Diego 100M 2025 (32 hours) † |
| 106165 | Jourdain | Benoit | M | FRA | FR | 64 | Trail du Saint-Jacques by UTMB 130km 2025 (28 hours) |
| 112865 | Jovanovic | Velibor | M | Slovenia | SI | 4 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 120603 | Joyes | Gabe | M | Wyoming | US | 2 | Hardrock 100M 2025 (48 hours) † |
| 127663 | Jozsa | Peter | M | Hajdu-Bihar | HU | 1 | Gran Trail Courmayeur 100km 2025 (28 hours) |
| 127215 | Juhasova | Tatiana | F | Slovakia | SK | 1 | Zugspitz 100M 2025 (48 hours) |
| 125734 | Julian | James | M | Utah | US | 1 | Guzzler Ultra 100km 2025 (24 hours) |
| 124050 | julien | aupet | M | savoie | FR | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 120912 | Jullien | Yannick | M | Rhône Alpes | FR | 2 | Swiss Canyon Trail 100M 2025 (44 hours) |
| 125784 | Jun | Ahyun | F | Seoul | KR | 1 | Transjeju by UTMB 150km 2025 (37 hours) |
| 119495 | Jun | Jong Ju | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 121126 | JUNG | FILHWA | M | South Korea | KR | 2 | Transjeju by UTMB 150km 2025 (37 hours) |
| 124533 | Jungers | Matthew | M | Wisconsin | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 119709 | Junho | Son | M | Kyoungkido | KR | 2 | Mt Fuji 100M 2025 (46 hours) |
| 123600 | Junod | Alexander | M | Vaud | CH | 1 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 126858 | Jur | Arthur | M | VA | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 109492 | Jurasits | Michael | M | MN | US | 16 | Miwok 100km 2025 (15:30:59 hours) |
| 107848 | Jurcik | Juraj | M | Slovakia | SK | 16 | Letecka Stovka 104km 2025 (21 hours) |
| 120121 | Jurgens | John | M | Colorado | US | 2 | Never Summer 100km 2025 (23 hours) |
| 123838 | Jurgens | Megan | F | Colorado | US | 1 | Zion 100km 2025 (19 hours) |
| 100973 | Jurynec | Mick | M | UT | US | 256 | Superior 100M 2025 (38 hours) † |
| 125949 | Justo | Leandro | M | SP | BR | 1 | Kerry Way Ultra 101km 2025 (20 hours) |
| 117859 | Jutz | Joachim | M | Bavaria | DE | 4 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 124735 | Juupaluoma | Henrik | M | Gothenburg | SE | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 118224 | Juvala | Markus | M | Helsinki | FI | 4 | Istria by UTMB 168km 2025 (46 hours) |
| 116148 | Juza | Tyler | M | HI | US | 2 | HURT 100M 2025 (36 hours) † |
| 104647 | K | Santhosh | M | IND | IN | 2 | Malnad Ultra 100km 2024 (21 hours) |
| 101684 | Kabanuck | Richard | M | TX | US | 64 | Leadville Trail 100M 2025 (30 hours) |
| 120658 | Kaberna | John | M | TX | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 110417 | Kabra | Aashish | M | CO | US | 8 | Pine to Palm 100M 2025 (34 hours) † |
| 126071 | KABURAGI | KAZUSHIGE | M | Kanagawa-ken | JP | 1 | OSJ Ontake 100km 2025 (20 hours) |
| 120793 | Kabylbekov | Bakhyt | M | Almaty | KZ | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126140 | Kachadurian | Derek | M | Massachusetts | US | 1 | San Diego 100M 2025 (32 hours) † |
| 126605 | Kachenko | Daniel | M | California | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 125231 | Kacherski | Cade | M | NJ | US | 1 | Burning River 100M 2025 (30 hours) |
| 120030 | Kacsuta | Kaitlyn | F | NY | US | 2 | Laurel Highlands 70.5M 2025 (20 hours) |
| 119616 | Kaczmarski | Ben | M | DC | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 116420 | Kaczynski | Patrick | M | Deutschland | DE | 4 | Letecka Stovka 104km 2025 (21 hours) |
| 124415 | Kade | Matthew | M | Montana | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 111446 | Kadiri | Adewale | M | Suffolk | GB | 4 | Autumn 100M 2025 (28 hours) |
| 127207 | Kaewyoun | Sukrit | M | - | TH | 1 | Pong Yaeng Trail 100km 2025 (31 hours) |
| 126599 | Kagan | Ryan | M | Co | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 124040 | kage brennan | kage brennan | M | Hampshire | US | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 122432 | KAGEYAMA | JUNKO | F | Mie | JP | 2 | Lake Biwa 100M 2025 (52 hours) |
| 125560 | Kahaly | Bobby | M | CA | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 123702 | Kahanek | Ryan | M | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 119867 | Kahl | Christoph | M | Hessen | DE | 2 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 hours) |
| 127317 | Kahl | Steve | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 119910 | Kählke | Lukas | M | Bavaria | DE | 2 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 127252 | Kajian | Shant | M | Berlin | DE | 1 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 115491 | Kalbus | Kyle | M | TN | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 124658 | Kale | Brad | M | MT | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 126113 | Kalechyn | Adam | M | Manitoba | CA | 1 | Lost Soul Ultra 100km 2025 (21 hours) |
| 116012 | Kalina | Eric | M | FL | US | 2 | Long Haul 100M 2025 (30 hours) † |
| 124270 | Kalke | Katherine | N | utah | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 117431 | Kalkman | Rachel | F | British Columbia | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 113582 | Kallembach | Corey | M | CO | US | 8 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 125570 | Kallhof | Brian | M | Florida | US | 1 | Superior 100M 2025 (38 hours) † |
| 118452 | KALMAR | ROI | M | Israel | IL | 4 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 111714 | Kaluka | Jesse | M | NC | US | 8 | Leadville Trail 100M 2025 (30 hours) |
| 101111 | Kam | Max | M | CA | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 106140 | Kamages | Alex | M | CA | US | 32 | HURT 100M 2025 (36 hours) |
| 117051 | Kameda | Atsushi | M | tokyo | JP | 4 | OSJ Ontake 100km 2025 (20 hours) |
| 125423 | Kamenšek | Boštjan | M | Slovenia | SI | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 121033 | Kaminski | Chris | M | PA | US | 2 | Vermont 100M 2025 (30 hours) |
| 120961 | KAMIOKA | TAKAYUKI | M | 高知県 | JP | 2 | OSJ Ontake 100M 2025 (24 hours) |
| 115469 | Kampakis | Vasileios | M | Thessaloniki | GR | 4 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 112250 | Kanarr | Kirsten | F | CA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 125274 | Kanda | Yutaro | M | British Columbia | CA | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 112654 | Kane | Abraham | M | Michigan | US | 8 | Indiana 100M 2025 (30 hours) |
| 100964 | Kane | Andrea | F | CA | US | 4 | San Diego 100M 2025 (32 hours) † |
| 126798 | Kane | Brian | M | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 120442 | Kane | Evan | M | California | US | 2 | San Diego 100M 2025 (32 hours) † |
| 101767 | Kang | Dean | M | CT | US | 4 | Istria by UTMB 110km 2025 (24 hours) |
| 112543 | Kang | Jin Abraham | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 127422 | kang | jiong | F | Victoria | AU | 1 | Surf Coast Century 100km 2025 (17 hours) |
| 115187 | Kangsadjaja | Ferry | M | DKI Jakarta | ID | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 116343 | Kania | Dave | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 118310 | Kanjanasuttiyakorn | Threerawat | M | Bangkok | TH | 2 | HOKA Chiang Mai Thailand by UTMB Trans-Int 160 175km 2024 (48 hours) |
| 106174 | Kao | Wade | M | TX | US | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 113119 | Kapetanovic | Tomislav | M | Croatia | HR | 2 | Istria by UTMB 110km 2025 (24 hours) |
| 120661 | Kaplan | Jason | M | MA | US | 2 | Vermont 100km 2025 (17 hours) |
| 125799 | Kaplan | Jason | M | Massachusetts | US | 1 | Patagonia 100M 2025 (42 hours) |
| 109731 | Kardis | Theodore | M | Kansas | US | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 114223 | KARDOUS | PASCAL | M | ile de france | FR | 4 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 124320 | Karimi | Elham | F | California | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 127973 | Kario | Chisato | F | Tokyo | JP | 1 | Okushinano 100km 2025 (21 hours) |
| 123929 | Karlik | Radomir | M | Czech Republic | CZ | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 111631 | Karlstedt | Conny | M | BW | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 126455 | Karpinski | Igor | M | IDF | FR | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 118646 | Karthan | Sam | M | California | US | 4 | Bigfoot 206M 2025 (100 hours) † |
| 121251 | Karykas | Alexandros | M | Attiki | GR | 2 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 120026 | KASAI | AKIRA | M | KANAGAWA | JP | 2 | Lake Biwa 100M 2025 (52 hours) |
| 108409 | Kasow | Lindsay | F | California | US | 16 | Yeti Virginia 100M 2025 (30 hours) † |
| 124385 | Kassas | Ziad | M | Alberta | CA | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 117876 | Katelhon | Tom | M | PA | US | 4 | Worlds End 100km 2025 (19 hours) |
| 126410 | Kato | Kensuke | M | Kanagawa | JP | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127111 | Kato | Nami | F | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 116674 | KATO | NAOTAKE | M | KAGOSHIMA | JP | 2 | Transjeju by UTMB 107km 2025 (25 hours) |
| 126212 | Kato | Sara | F | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 126616 | Kattan | Omar | M | WI | US | 1 | Moab 238M 2025 (108 hours) † |
| 127782 | Katzke Simonsen | Julie | F | Sermersooq | GL | 1 | SwissPeaks 170km 2025 (58 hours) |
| 104564 | Kauffman | Mark | M | CA | US | 128 | Canyons by UTMB 104km 2025 (20 hours) |
| 111474 | Kaufmann | Gerhard | M | Vorarlberg | AT | 8 | Grossglockner UltraTrail 110km 2025 (28 hours) |
| 121148 | Kaulback | Russ | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 119643 | Kauri | Mari | F | WA | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 104056 | Kauri | Roni | M | WA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 101452 | Kautz | Stefanie | F | OR | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 116471 | Kavanagh | Patrick | M | AZ | US | 4 | Bear, The 100M 2025 (36 hours) † |
| 122557 | Kawachi | Takashi | M | Chiba | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 122155 | Kawaguchi | Makoto | M | Singapore | SG | 2 | HOKA Chiang Mai Thailand by UTMB Trans-Int 160 175km 2024 (48 hours) |
| 107543 | Kawai | Tatsuya | M | CA | US | 8 | Mamba 100M 2024 (34 hours) † |
| 123077 | Kawakami | Koichi | M | Chiba | JP | 2 | Transgrancanaria 125km 2025 (28 hours) |
| 115756 | Kawakami | Naoaki | M | Ibaraki | JP | 4 | Mt Fuji 100M 2025 (46 hours) |
| 127136 | Kawanishi | Taiga | M | Hyogo | JP | 1 | Mt Fuji 100M 2025 (46 hours) |
| 119863 | KAWASHIMA | SHO | M | KANAGAWA | JP | 2 | Shinetsu Five Mountains Trail 110km 2025 (22 hours) |
| 124902 | KAWASHIMO | NAMI | F | tokyo | JP | 1 | OSJ Ontake 100km 2025 (20 hours) |
| 127704 | Kawata | Yuya | M | Tokyo | JP | 1 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 126585 | Kay | Anthony | M | tx | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 123523 | Kay | Sarah | F | Nsw | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 112906 | Kay | Sharlota | F | NY | US | 8 | Cascade Crest 100M 2025 (34 hours) |
| 119550 | Kazery | Peter | M | Mississippi | US | 2 | Pinhoti 100M 2025 (32 hours) |
| 123812 | Kazman | Fidel | M | Bavaria | DE | 1 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 hours) |
| 123218 | Kazukawa | Keisuke | M | Hokkaido | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 109214 | Keane | Conor | M | Kilkenny | IE | 4 | Tarawera by UTMB 102km 2025 (17 hours) |
| 118060 | Keane | Deirdre | F | NY | US | 4 | Grindstone by UTMB 100M 2025 (36 hours) |
| 122181 | Keane | Josh | M | Ohio | US | 2 | Canal Corridor 100M 2025 (30 hours) † |
| 108296 | Kearon | Samuel | M | ACT | US | 16 | Buffalo Stampede 100km 2025 (23 hours) |
| 127965 | Keasal | Ashley | F | WA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 104575 | Keating | Pete | M | WA | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 126953 | Kechejian | Pete | M | Texas | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 122070 | Keck | Chris | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 113846 | Ked | Jon | M | CO | US | 8 | Ultra-Trail Cape Town 100M 2024 (45 hours) |
| 127340 | Keeber | Thomas | M | Leicestershire | US | 1 | Lakeland 100M 2025 (40 hours) |
| 115978 | Keel | Dylan | M | CA | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 123594 | Keeler | Jessie | F | CT | US | 1 | Waldo 100km 2025 (18 hours) † |
| 121396 | Keenan | James | M | Glasgow | GB | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 111981 | Keenan | Nick | M | WA | US | 8 | Cascade Crest 100M 2025 (34 hours) |
| 125241 | Keenan MIfsud | Marcia | F | New South Wales | AU | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 111908 | Keffer | Philip | M | Vermont | US | 8 | Vermont 100km 2025 (17 hours) |
| 106467 | Kegan | Amelia | F | MD | US | 8 | Tahoe 202M 2025 (100 hours) † |
| 127946 | Keith | Alexander | M | OHIO | US | 1 | Burning River 100M 2025 (30 hours) |
| 102518 | Keith | Alissa | F | VA | US | 32 | Hellgate 100km 2024 (17 hours) |
| 125516 | Keith | Jason | M | Utah | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 119586 | Keith | Matthew | M | California | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 119455 | Kel | Charles-Louis | M | BAS-RHIN | FR | 2 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 126264 | Keleher | Cara | F | Montana | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 115951 | Kellam | Alex | M | Colorado | US | 4 | IMTUF 100M 2025 (36 hours) † |
| 126326 | Kelleher | Kevan | M | PA | US | 1 | Eastern States 100M 2025 (36 hours) |
| 118876 | Kellenberger | Matthew | M | Montana | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 110959 | Keller | Clinton | M | CA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 124876 | Keller | David | M | Ohio | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 104563 | Keller | James | M | NV | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 127486 | Kellett | Ben | M | West Yorkshire | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 123670 | kelley | brittany | F | OR | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 126050 | Kelley | Bryan | M | Georgia | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 126088 | Kelley | Charlotte | F | MASSACHUSETTS | US | 1 | Vermont 100M 2025 (30 hours) |
| 102658 | Kelley | Dan | M | MA | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 114421 | Kelley | Gibson | F | TN | US | 2 | Hennepin 100M 2025 (30 hours) |
| 100998 | Kelley | Rachel | F | NC | US | 8 | Cruel Jewel 106M 2025 (48 hours) † |
| 122323 | Kellogg | Nathan | M | Pennsylvania | US | 2 | Laurel Highlands 70.5M 2025 (20 hours) |
| 113123 | Kelly | Andrew | M | England | GB | 2 | San Diego 100M 2025 (32 hours) † |
| 111983 | Kelly | Chris | M | Cambridgeshire | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 121568 | Kelly | Cole | M | California | US | 2 | San Diego 100M 2025 (32 hours) † |
| 112407 | Kelly | Conan | M | CA | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 124118 | Kelly | Deanna | F | ON | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 125756 | Kelly | Doug | M | TX | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 118615 | KELLY | GENE | M | TX | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 101150 | Kelly | John | M | NC | US | 64 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 122088 | Kelly | John | M | MO | US | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 127026 | Kelly | Jon | M | West Yorkshire | GB | 1 | Autumn 100M 2025 (28 hours) |
| 112756 | Kelly | Marc | M | CT | US | 2 | Vermont 100M 2025 (30 hours) |
| 127719 | Kelly | Matthew | M | New South Wales | AU | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 104717 | Kelly | Neil | M | NY | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 126451 | Kelly | Sean | M | Northumberland | GB | 1 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 112269 | Kelly | William | M | Munster | IE | 2 | Kerry Way Ultra 101km 2025 (20 hours) |
| 109607 | Kelly-Daum | Michelle | F | OH | US | 16 | Mohican 100M 2025 (32 hours) |
| 104008 | Kelman | Erin | M | MD | US | 1 | Western States 100M 2025 (30 hours) † |
| 109811 | Kelman | Kristen | F | Maryland | US | 8 | Massanutten 100M 2025 (36 hours) † |
| 112693 | Kelsey | Rob | M | IL | US | 8 | Hennepin 100M 2025 (30 hours) † |
| 125760 | Keltner | Casey | M | California | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 112590 | Kelty | Beth | F | Oregon | US | 8 | Pine to Palm 100M 2025 (34 hours) † |
| 126257 | Kemp | Andrew | M | East Sussex | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 117539 | Kemp | Angie | F | AZ | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 125591 | Kemp | Matthew | M | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 123841 | Kemp | Richard | M | Virginia | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 127277 | Kempe | Per | M | Manawatu | NZ | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 125330 | Kemper | Sam | M | CA | US | 1 | Leona Divide 100M 2025 (33 hours) † |
| 124414 | Kempkes | Tyler | M | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 111529 | Kempton | Neil | M | North Somerset | GB | 8 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 125152 | Kendall | Nikki | F | La | US | 1 | Mamba 100M 2024 (34 hours) † |
| 124287 | Kendall | Rachel | F | IL | US | 1 | Zion 100km 2025 (19 hours) |
| 103329 | Kendra | Victoria | F | NC | US | 16 | Hellbender 100M 2025 (40 hours) † |
| 100026 | Kenealy | Douglas | M | Qld | AU | 16 | Blackall 100km 2025 (18 hours) |
| 102565 | Kenkre | Baban | M | CA | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 127539 | Kennard | Steve | M | Southland | NZ | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 116465 | Kennedy | Cian | M | Cork | IE | 4 | Autumn 100M 2025 (28 hours) |
| 111412 | Kennedy | David | M | Pennsylvania | US | 8 | Worlds End 100km 2025 (19 hours) |
| 116395 | Kennedy | Kelly | M | Pennsylvania | US | 4 | Eastern States 100M 2025 (36 hours) |
| 123054 | Kennedy | Ryan | M | Michigan | US | 2 | Grindstone by UTMB 100M 2025 (36 hours) |
| 107735 | Kenney | Sean | M | NE | US | 16 | Tunnel Hill 100M 2024 (30 hours) † |
| 124186 | Kennicott | Brent | M | North Carolina | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 107548 | Kenny | Charissa | F | Colorado | US | 16 | Run Rabbit Run 100M 2025 (36 hours) † |
| 100524 | Kent | Craig | M | OH | US | 256 | Never Summer 100km 2025 (23 hours) |
| 114304 | Kent | Michelle | F | CO | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 116878 | Kent | Victoria | F | ID | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 118464 | Kent | William | M | OK | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 126301 | Kenworthy | Josh | M | Fl | US | 1 | Sedona Canyons 125M 2025 (52 hours) |
| 115200 | Kenyon | Claire | F | Greater Manchester | GB | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 124114 | Kerby | Logan | M | WV | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 112057 | Kerezman | Benjamin | M | IN | US | 8 | Indiana 100M 2025 (30 hours) |
| 111046 | Kerins | Kate | F | CA | US | 1 | Leona Divide 100km 2025 (17 hours) |
| 115018 | Kern | Jeff | M | AR | IT | 4 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 125754 | Kern | Martin | M | Zurich | US | 1 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 123879 | Kerrison | Scott | M | Oslo | NO | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 122177 | Kersh | Stephen | M | Washington | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 106883 | Kershen | Michael | M | CO | US | 64 | Cocodona 250M 2025 (125 hours) |
| 127882 | Kershner | Stephanie | F | PA | US | 1 | Eastern States 100M 2025 (36 hours) |
| 126993 | Kertész | Kata | F | Pest megye | HU | 1 | Nuts Ylläs Pallas 160km 2025 (35 hours) |
| 111603 | Kervarec | Sebastien | M | Zurich | CH | 8 | SwissPeaks 100km 2025 (28 hours) |
| 120271 | Keßler | Nicole | F | Germany | DE | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 123522 | Keßler | Yvonne | F | NRW | DE | 1 | Zugspitz 100M 2025 (48 hours) |
| 120711 | Kester | Sean | M | Nevada | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 114436 | Key | Richard | M | Virginia | US | 8 | Hellgate 100km 2024 (17 hours) |
| 124289 | Keyo | Michael | M | Pennsylvania | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 100388 | Keyo | Peter | M | CT | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 122702 | Keys | Joe | N | NC | US | 2 | Hellbender 100M 2025 (40 hours) † |
| 117687 | Khachatooryan | Aramik | M | California | US | 4 | Angeles Crest 100M 2025 (36 hours) † |
| 108352 | Khadka | Sworupa | F | NY | US | 16 | Bighorn 100M 2025 (35 hours) |
| 123431 | Khalid | Sam | M | GB | GB | 1 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 127022 | Khan | Salman | M | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 116185 | Khitrykau | Dzmitry | M | Colorado | US | 4 | Bighorn 100M 2025 (35 hours) |
| 127205 | Khodadad | Iman | M | California | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 123387 | Khomenko | Oleksandr | M | Florida | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 127007 | Khong | Sean | M | NA | SG | 1 | Moab 238M 2025 (108 hours) |
| 125342 | Khoshnevisan | Alex | M | England | GB | 1 | Autumn 100M 2025 (28 hours) |
| 112210 | Kibit | Henry | M | OR | US | 8 | IMTUF 100M 2025 (36 hours) † |
| 110699 | Kibreab | Elias | M | ON | CA | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 104706 | Kiddle | Matthew | M | GBR | GB | 128 | Lakeland 100M 2025 (40 hours) |
| 103681 | Kido | Kensuke | M | JPN | JP | 8 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 101201 | Kienle | Eric | M | MT | US | 16 | Canadian Death Race 118km 2025 (24 hours) |
| 111522 | Kiernan | Jasper | M | West Midlands | GB | 4 | North Downs Way 100M 2025 (30 hours) |
| 126404 | Kiesewetter | Pierre | M | Sachsen | DE | 1 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 120177 | Kievit | Forrest | M | NE | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 116097 | Kiewiet | Ross | M | AZ | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 112297 | Kiewiet | Ryan | M | Arizona | US | 8 | Sean O'Brien 100km 2025 (17 hours) † |
| 126740 | Kiger | Elijah | M | Pennsylvania | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 126400 | Kikuchi | Masato | M | Kanagawa | JP | 1 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 106054 | Kikushima | Kei | M | JPN | JP | 16 | FunTrails Chichibu & Okumusashi 100M 2024 (32 hours) |
| 102461 | Kilar | Ken | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 102117 | Kilbury | Tyler | M | MN | US | 1 | Western States 100M 2025 (30 hours) † |
| 124183 | Kiley | Dan | M | Pennsylvania | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 123836 | Kilgore | Ethan | M | MA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 107388 | Kilgore | Jake | M | UT | US | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 117917 | Killesteyn | Kristy | F | NSW | AU | 1 | Western States 100M 2025 (30 hours) † |
| 126744 | Killip | Kevin | M | CA | US | 1 | Sean O'Brien 100km 2025 (17 hours) † |
| 125155 | kim | alan | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 118336 | KIM | BONGJAE | M | Gyeongsangnam-do | KR | 2 | Mt Fuji 100M 2025 (46 hours) |
| 104264 | Kim | Dujin | F | WA | US | 32 | Cascade Crest 100M 2025 (34 hours) |
| 127814 | kim | harry | M | seoul | US | 1 | Transjeju by UTMB 150km 2025 (37 hours) |
| 118440 | KIM | HEENAM | M | SEOUL | KR | 4 | Transjeju by UTMB 150km 2025 (37 hours) |
| 100168 | Kim | Hohyun | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 121440 | Kim | Hyojun | M | California | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 118999 | Kim | Insung | F | MD | US | 4 | C & O Canal 100M 2025 (30 hours) |
| 113505 | Kim | Jane | F | CA | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 118331 | Kim | Moon Hwan | M | Seoul | KR | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127654 | Kim | Sanghoon | M | Kyungbuk | US | 1 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 127653 | Kim | Seungtae | M | Seoul | KR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 103383 | Kimber | Evan | M | CO | US | 16 | Canal Corridor 100M 2025 (30 hours) † |
| 120000 | Kimber | Jill | F | QC | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 101644 | Kimble | Adam | M | CA | US | 8 | C & O Canal 100M 2025 (30 hours) † |
| 118514 | Kindelbacher | Bernhard | M | Hesse | DE | 2 | Swiss Alps 100M 2025 (50 hours) |
| 119579 | Kindt | Derek | M | Oregon | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 120527 | KInek | Daniel | M | Pennsylvania | US | 2 | Vermont 100M 2025 (30 hours) |
| 124811 | King | Alison | F | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 124091 | King | Austin | M | Ohio | US | 1 | Eastern States 100M 2025 (36 hours) |
| 108339 | King | Brian | M | AZ | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 124799 | King | Greg | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 107489 | King | Jamie | F | OR | US | 16 | San Diego 100M 2025 (32 hours) † |
| 112913 | King | Jennifer | F | GA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 116654 | King | Jeremey | M | NM | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 113137 | King | Josh | M | AB | CA | 8 | Canadian Death Race 118km 2025 (24 hours) |
| 122325 | King | Madeleine | F | IL | US | 1 | Western States 100M 2025 (30 hours) † |
| 110347 | King | Mosi | M | OR | US | 16 | Pine to Palm 100M 2025 (34 hours) † |
| 120257 | King | Rob | M | Ohio | US | 2 | San Diego 100M 2025 (32 hours) † |
| 109830 | KING | Ryan | M | Nevada | US | 16 | Rim to River 100M 2025 (32 hours) † |
| 115432 | King | Stan | M | GA | US | 4 | Yeti Virginia 100M 2025 (30 hours) † |
| 124951 | King | Taylor | F | Ca | US | 1 | San Diego 100M 2025 (32 hours) † |
| 119063 | Kingsbury | Trever | M | Alaska | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 105634 | Kingston | Patrick | M | GBR | GB | 64 | Ultra Trail Vipava Valley 106km 2025 (25 hours) |
| 127336 | Kinkaid | Sirirat | F | GA | US | 1 | Canal Corridor 100M 2025 (30 hours) |
| 126586 | Kinnell | Lee | M | Fife | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 110611 | Kinner | Jon | M | CO | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 102437 | Kinner | Justin | M | WY | US | 16 | HURT 100M 2025 (36 hours) † |
| 108773 | Kinney | Matt | M | California | US | 16 | San Diego 100M 2025 (32 hours) † |
| 105746 | Kinney | Rachel | F | NM | US | 4 | Bighorn 100M 2025 (35 hours) |
| 124432 | Kinney | Tom | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 117666 | Kinsley | Thomas | M | QLD | AU | 4 | Buffalo Stampede 100km 2025 (23 hours) |
| 120453 | Kintzel | Erik | M | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 112259 | Kipper | Andre | M | Niederösterreich | AT | 4 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 114339 | Kipps | Walter | M | VA | US | 8 | Hellgate 100km 2024 (17 hours) |
| 117212 | Kirby | John | M | MT | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 111385 | Kirby | Kathryn | F | CA | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 116414 | Kirby | Steve | M | Ohio | US | 2 | Umstead 100M 2025 (30 hours) |
| 127888 | Kirchner | Matthias | M | NY | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 112239 | Kirk | Samuel | M | PA | US | 8 | Hellgate 100km 2024 (17 hours) |
| 119083 | Kirkeby | Jordan | M | Alberta | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 114154 | Kirkman | Derek | M | FL | US | 8 | Long Haul 100M 2025 (30 hours) † |
| 125038 | Kirkpatrick | Scott | M | California | US | 1 | Sean O'Brien 100km 2025 (17 hours) † |
| 111804 | Kirkwood | Cam | M | Ontario | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 124416 | Kirkwood | Kyle | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 108540 | Kirkwood | Peter | M | IN | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 126416 | Kirschner | Matthew | M | Oregon | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 110316 | Kish | William | M | CA | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 103577 | Kiso | Tetsuo | M | JPN | JP | 64 | OSJ Ontake 100km 2025 (20 hours) |
| 108771 | kisylia | suzy | F | ca | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 110065 | Kitano | Masahiro | M | CA | US | 16 | Zion 100M 2025 (36 hours) † |
| 116373 | Kitching | Luke | M | Alberta | CA | 4 | Beaverhead 100km 2025 (20 hours) |
| 108104 | Kivi | Josh | M | Nevada | US | 16 | Bear, The 100M 2025 (36 hours) † |
| 111112 | Kjartansdottir | Andrea | F | Reykjavik | IS | 4 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 113234 | Kjellberg | Marcus | M | Halland | SE | 8 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 125891 | Klahn | Jeffrey | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 125346 | Klančnik Potrč | Martina | F | Maribor | SI | 1 | Transgrancanaria 125km 2025 (28 hours) |
| 125325 | Klapinska | Bozena | F | Surrey | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 127011 | Klaschus | Alexander | M | Colorado | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 112038 | Klassen | Lindsey | F | CA | US | 8 | Canyons by UTMB 100M 2025 (35 hours) |
| 112443 | Klatt | Denise | F | NI | DE | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 109667 | Klaustermeier | Jake | M | IL | US | 8 | Mohican 100M 2025 (32 hours) |
| 124443 | Klawitter | Andreas | M | BC | CA | 1 | Fat Dog 120M 2025 (48 hours) † |
| 116918 | Klawitter | Karsten | M | BC | CA | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 108316 | Klayko | Christina | F | CA | US | 16 | Quicksilver 100km 2025 (17 hours) † |
| 107654 | Klebba | Amanda | F | Colorado | US | 8 | Bighorn 100M 2025 (35 hours) |
| 119025 | Kleemeier | Doug | M | MN | US | 4 | Superior 100M 2025 (38 hours) † |
| 118356 | Klein | Michael | M | Montana | US | 4 | Cuyamaca 100km 2025 (17 hours) † |
| 109676 | Klein | Michael | M | UT | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 126431 | Klein | Thomas | M | Idaho | US | 1 | Bear, The 100M 2025 (36 hours) |
| 124325 | Kleiner | Eike | M | Baden-Württemberg | DE | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 105302 | Kleinke | Andrew | M | CA | US | 2 | San Diego 100M 2025 (32 hours) † |
| 105494 | Kleinman | Aaron | M | CA | US | 16 | IMTUF 100M 2025 (36 hours) † |
| 100285 | Kleist | Todd | M | IL | US | 8 | Vermont 100km 2025 (17 hours) |
| 125581 | Klemmeck | Benjamin | M | VA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124564 | Kleparek | Anton | M | WA | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 115662 | Kleparek | David | M | KY | US | 4 | HURT 100M 2025 (36 hours) † |
| 104464 | Klettlinger | Mark | M | OH | US | 1 | Western States 100M 2025 (30 hours) † |
| 121159 | Kleven | James | M | WI | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 113243 | Kline | Jon | M | California | US | 1 | Western States 100M 2025 (30 hours) † |
| 107358 | Kline | Vanessa | F | NJ | US | 4 | C & O Canal 100M 2025 (30 hours) † |
| 127060 | Kling | Niclas | M | Hönö | SE | 1 | Täby Extreme Challenge 100M 2025 (30 hours) |
| 114951 | Klingman | Alana | F | CA | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 116283 | Klinker | Jake | M | CO | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 123738 | Klomp | Mitch | M | Colorado | US | 1 | Never Summer 100km 2025 (23 hours) |
| 127514 | Klopp | Benjamin | M | Bavaria | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 123004 | Kmiec | Simon | M | Hauts-de-Ftance | FR | 2 | Grand Raid Ventoux by UTMB 124km 2025 (30 hours) |
| 113272 | Knabe | Zachery | M | WA | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 114040 | Knapp | Marcela | F | AZ | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 124725 | Knauss | Daniel | M | MA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 126863 | Knebel | Philipp | M | Zug | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 124694 | Knettel | Jacob | M | Texas | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 121560 | Knickerbocker | Leah | F | MT | US | 2 | Zion 100km 2025 (19 hours) |
| 127085 | Knight | Brian | M | ID | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 125766 | Knight | Brian | M | Oklahoma | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 124512 | Knight | Derek | M | Or | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 101906 | Knight | Don | M | PA | US | 1 | Western States 100M 2025 (30 hours) † |
| 116535 | Knights | Charlie | M | Glos | GB | 2 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 109846 | Knipling | Keith | M | VA | US | 4 | Massanutten 100M 2025 (36 hours) † |
| 114031 | Knopp | Kelly | F | CA | US | 4 | Sedona Canyons 125M 2025 (52 hours) |
| 124569 | Knopp | Tracen | M | AK | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124723 | Knowler | Rusty | M | Washington | US | 1 | Cascade Crest 100M 2025 (34 hours) |
| 127626 | Knowles | Carla | F | GA | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 119274 | Knox | Caitlin | F | BOP | NZ | 2 | Taupo 100km 2025 (17 hours) |
| 125268 | Knox | Emma | F | Maryland | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 116059 | Knox | Steve | M | FL | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124677 | Knudson | Rachael | F | California | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 122532 | ko | minchul | M | jeju | KR | 2 | Transjeju by UTMB 150km 2025 (37 hours) |
| 117822 | KOBA | Hironobu | M | Hokkaido | JP | 2 | Aso Volcano Trail 115km 2025 (28 hours) |
| 118392 | Kobayashi | Eriko | F | 茨城県 | JP | 2 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 118896 | Kobayashi | Masanao | M | TX | US | 4 | Brazos Bend 100M 2024 (32 hours) |
| 124887 | Kobliuk | Andrii | M | BC | US | 1 | Cascade Crest 100M 2025 (34 hours) |
| 114332 | Koca | Joseph | M | NC | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 122394 | Koch | Adrian | M | Bavaria | DE | 1 | Western States 100M 2025 (30 hours) † |
| 125400 | Koch | Dave | M | New York | US | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 108272 | koch | kristopher | M | TX | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 109798 | Kocis | Brent | M | MA | US | 2 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 121501 | Koda | Masao | M | Tokyo | JP | 2 | OSJ Ontake 100km 2025 (20 hours) |
| 112280 | Kodaira | Masakazu | M | Tokyo | JP | 8 | OSJ Ontake 100km 2025 (20 hours) |
| 118882 | Kodovsky | Jan | M | Rhode Island | US | 2 | Krakonosova Stovka 100km 2025 (22 hours) |
| 125108 | Koehl | Melanie | F | HI | US | 1 | HURT 100M 2025 (36 hours) |
| 125851 | Koehler | Eric | M | Montana | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 126496 | Koehler | Torsten | M | Saxony | DE | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 100376 | Koelli | Wolfgang | M | AUT | AT | 8 | Grossglockner UltraTrail 110km 2025 (28 hours) |
| 112019 | Koenig | Erik | M | California | US | 8 | HURT 100M 2025 (36 hours) † |
| 112679 | Koenig | John | M | Indiana | US | 4 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 123530 | Koenigshofer | Roland | M | Steiermark | AT | 1 | Istria by UTMB 168km 2025 (46 hours) |
| 123586 | Koepf | Alexandra | F | MI | US | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 110066 | Koh | Alec | M | Oregon | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 121041 | Kohlbrenner | Daniel | M | Ca | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 109434 | Kohler | Benjamin | M | Zug | CH | 8 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 102360 | Kohlhund | Andreas | M | DEU | DE | 2 | Zugspitz 106km 2025 (25 hours) |
| 105336 | Kohout | Piera | F | AUS | AU | 64 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 125862 | Kohrs | Russell | M | AB | CA | 1 | Bighorn 100M 2025 (35 hours) |
| 127298 | Kohs | Tia | F | VA | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 127890 | Koike | Masaki | M | Hokkaido | JP | 1 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 105776 | Kojala | Donatas | M | LTU | LT | 32 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 109709 | Kolaric | Ivana | F | UAE | AE | 2 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 113459 | Kolasinski | Larissa | F | WA | US | 8 | Zion 100km 2025 (19 hours) |
| 108233 | Kolb | Adam | M | PA | US | 8 | Long Haul 100M 2025 (30 hours) † |
| 119410 | Kolpack | Eric | M | New york | US | 2 | Eastern States 100M 2025 (36 hours) |
| 122925 | Komala | Kenny | M | NY | US | 2 | Vermont 100M 2025 (30 hours) |
| 117834 | komine | hisashi | M | tokyo | JP | 2 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 107345 | Komol | Sirirath | F | Bangkok | TH | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 121114 | Komp | Andrew | M | WI | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 125328 | Komuro | Hiroaki | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 104543 | Kondo | Sarah | F | ON | CA | 32 | Sulphur Springs 100km 2025 (18 hours) |
| 119489 | Koniar | Marian | M | Slovakia | SK | 2 | Istria by UTMB 110km 2025 (24 hours) |
| 120417 | Koniarová | Vanda | F | Slovakia | SK | 2 | Javornika 105km 2025 (24 hours) |
| 126204 | Konieczny | Maja | F | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 102901 | Kono | Daniel | M | CA | US | 4 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 110190 | Kononenko | Oleksii | M | Kiyv | UA | 8 | Bighorn 100M 2025 (35 hours) |
| 127029 | Konopka | Mark | M | CT | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 108807 | Konowitch | Sam | M | Nevada | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 102551 | Kontovich | Patrick | M | TN | US | 4 | Angeles Crest 100M 2025 (36 hours) † |
| 115540 | Kool | Steven | M | CA | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 120122 | Koop | Jonathan | M | NY | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 110070 | Koopmans | Carl | M | WA | US | 8 | Quicksilver 100km 2025 (17 hours) † |
| 108532 | Kopczynski | Bartosz | M | Uusimaa | FI | 16 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 127164 | Kopec | Richard | M | NY | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 111242 | Kopelov | Labe | M | Indiana | US | 4 | Indiana 100M 2025 (30 hours) |
| 114327 | Kopelwitz | Jessica | F | OH | US | 4 | No Business 100M 2025 (34 hours) |
| 112351 | Kopf | Maximilian | M | Tirol | AT | 8 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 101825 | Koppany | Adam | M | ON | CA | 32 | Twisted Branch 100km 2025 (20 hours) † |
| 121577 | Korbel | Jason | M | Iowa | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 117661 | Kordie | Matt | M | Michigan | US | 4 | Cruel Jewel 106M 2025 (48 hours) † |
| 115526 | Korecki | Andrzej | M | Kujawsko-Pomorskie | PL | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 124273 | Korenfeld | Alexandre | M | IdF | FR | 1 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 127604 | KORMOS | Matteo | M | MI | IT | 1 | Tuscany Crossing 103km 2025 (21 hours) |
| 112705 | Kornegay | Matt | M | NC | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 120175 | Korobko | Marina | F | CA | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 113743 | Korona | Adam | M | Tx | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 117645 | korry | andrea | F | WA | US | 2 | Fat Dog 100km 2025 (24 hours) |
| 117686 | Kortum | Alex | M | BC | CA | 4 | Sedona Canyons 125M 2025 (52 hours) |
| 124090 | Kos | Piotr | M | Polska | PL | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 108405 | Kosbie | Jeffrey | M | California | US | 16 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127641 | Koseki | Shimpei | M | Tokyo | JP | 1 | Okushinano 100km 2025 (21 hours) |
| 104378 | Koshii | Daishi | M | JPN | JP | 16 | OSJ Ontake 100M 2025 (24 hours) |
| 127544 | Kosmac | Stanislav | M | Slovakia | US | 1 | Javornika 105km 2025 (24 hours) |
| 123706 | Koso | Carrie | F | Alaska | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 101786 | Kosova | Anya | F | CA | US | 128 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 109886 | Kostanic Juric | Karmen | F | Zagreb | HR | 2 | Ultra Trail Vipava Valley 165km 2025 (46 hours) |
| 119850 | Kostiuk | Jordan | M | RI | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 102026 | Kostka | Mike | M | MI | US | 16 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 124485 | Kotabish | Erica | F | OH | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 118229 | Kotai | Victor | M | London | GB | 4 | Istria by UTMB 168km 2025 (46 hours) |
| 124855 | Kotlewski | Jamie | M | AB | CA | 1 | Lost Soul Ultra 100M 2025 (33 hours) † |
| 109944 | Kotz | Jason | M | PA | US | 16 | Sulphur Springs 100M 2025 (30 hours) |
| 127216 | Kotze | Rohan | M | Stockholm | SE | 1 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 117391 | KOUGIOUMTZIS | GEORGIOS | M | Central Macedonia | GR | 4 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 111366 | Kovach | Marissa | F | Pennsylvania | US | 4 | Eastern States 100M 2025 (36 hours) |
| 109097 | Kowalczyk | Janosch | M | Baden-Württemberg | DE | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 105957 | Kowalik | Andrzej | M | POL | PL | 128 | Krakonosova Stovka 100km 2025 (22 hours) |
| 118930 | Kowalkiewicz | Marek | M | Queensland | AU | 4 | Guzzler Ultra 100km 2025 (24 hours) |
| 126732 | Kowalski | Chris | M | AL | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 115396 | Kowalski | Dan | M | MT | US | 4 | Pinhoti 100M 2025 (32 hours) |
| 120520 | Koyle | John | M | Utah | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 125132 | Koyle | Kristin | F | Utah | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 106023 | Kozak | Jeff | M | CA | US | 4 | Zion 100km 2025 (19 hours) |
| 122695 | Kozák | Vojtěch | M | Česká republika | CZ | 2 | Mozart by UTMB 119km 2025 (23 hours) |
| 119957 | Koziak | Tony | M | france | FR | 2 | Grand Raid Ventoux by UTMB 124km 2025 (30 hours) |
| 111357 | Krabel | Herbert | M | SC | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 104747 | Kraenzmer | Martin | M | SWE | SE | 4 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 107977 | Kraft | Justin | M | Co | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 120031 | Kragl | Mateusz | M | Bayern | DE | 2 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 101626 | Kragtorp | Wade | M | MN | US | 16 | IMTUF 100M 2025 (36 hours) † |
| 111788 | Krähenbühl | Samuel | M | Zug | CH | 4 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 124924 | Krahn | Nathanael | N | British Columbia | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 106499 | Krajna | Tom | M | AL | US | 32 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 118584 | Kralj | Heather | F | TN | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 126708 | Kralya | Roman | M | GENEVA | CH | 1 | Restonica Trail by UTMB - Ultra-Trail® di Corsica 110km 2025 (36 hours) |
| 121415 | Kram | Maurice | M | Groningen | NL | 2 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 115689 | Kramer | Ryan | M | IA | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 111122 | Kramer | Ryan | M | Ohio | US | 8 | Georgia Death Race 74M 2025 (24 hours) † |
| 111429 | Krantz | Molly | F | OR | US | 8 | Mountain Lakes 100M 2025 (30 hours) † |
| 110483 | Krantz | Rita | F | OR | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 104313 | Kranz | Jill | F | WA | US | 8 | Rio Del Lago 100M 2025 (30 hours) |
| 124113 | Krasnoselskiy | Boris | M | Barcelona | ES | 1 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 119201 | Krasovskiy | Arkady | M | TX | US | 2 | Brazos Bend 100M 2024 (32 hours) |
| 111943 | Krasznekewicz | Allegra | F | CA | US | 4 | Bear, The 100M 2025 (36 hours) † |
| 125941 | Kraszpulska | Magdalena | F | Lesser Poland | US | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 119487 | Kratzer | Mike | M | Bayern | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 110047 | Kraus | Joshua | M | CA | US | 16 | Angeles Crest 100M 2025 (36 hours) † |
| 108393 | Kraus | Zachary | M | IL | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 116728 | Krause | Benjamin | M | OR | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 122384 | Krause | Marco | M | Hessen | DE | 2 | Zugspitz 106km 2025 (25 hours) |
| 123463 | Krebs | Jessica | F | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 113631 | Kreeger | Nathan | M | NC | US | 4 | Hellgate 100km 2024 (17 hours) |
| 121276 | Kreienbaum | Martin | M | Berlin | DE | 2 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 116255 | Krempa | Slawomir | M | mazowieckie | PL | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125626 | Krepelka | Michael | M | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 110782 | Krepsik | Matt | M | UT | US | 16 | Wasatch Front 100M 2025 (36 hours) † |
| 121003 | Kress | Wade | M | TN | US | 1 | No Business 100M 2025 (34 hours) |
| 127361 | Kresser | Carolyn | F | NV | US | 1 | Never Summer 100km 2025 (23 hours) |
| 123248 | Kret | Adam | M | Slovakia | SK | 2 | Letecka Stovka 104km 2025 (21 hours) |
| 116057 | Kreutz | Caitlyn | F | NY | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 116642 | Kriakov | Ivan | M | Colorado | US | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 114416 | Kriechmair | Bernd | M | Österreich | AT | 1 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 124869 | Kriščiūnas | Vytautas | M | Vilnius | LT | 1 | Zugspitz 106km 2025 (25 hours) |
| 126739 | Krisler | Brian | M | Massachusetts | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 112910 | Kristoffersen | Maibritt | F | Ø | DK | 8 | Zugspitz 106km 2025 (25 hours) |
| 125493 | Kritzer | Matt | M | NY | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 119559 | Krivanek | Zdenek | M | Czech Republic | CZ | 2 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 126119 | Krivitski | Margarita | F | California | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 122231 | Krob | Karen | F | NM | US | 2 | Zion 100M 2025 (36 hours) † |
| 120330 | Kroetsch | Dallas | M | CA | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 117664 | Kroger | Chris | M | CA | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 126218 | Krogh | Noah | M | North Carolina | US | 1 | Umstead 100M 2025 (30 hours) |
| 104211 | Krogsrud | Ken | M | CA | US | 1 | Western States 100M 2025 (30 hours) |
| 117320 | Król | Maciej | M | pomorskie | PL | 1 | Letecka Stovka 104km 2025 (21 hours) |
| 116509 | Kroll | Danny | M | Alberta | CA | 2 | Crazy Mountain 100M 2025 (36 hours) † |
| 126648 | Kromer | Ryan | M | PA | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 123555 | Kromm | Jonathan | M | Hessen | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 115895 | kronable | mary | F | MO | US | 4 | Kettle Moraine 100M 2025 (30 hours) † |
| 119278 | Krone | Andrew | M | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 102383 | Kropf | Pamela | F | CA | US | 128 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 116859 | Kropf | Terrell | M | Arkansas | US | 4 | Never Summer 100km 2025 (23 hours) |
| 127934 | Kruchem | Jörg | M | NRW | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 123663 | Krug | Jeremy | M | VA | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 112787 | Kruger | Damon | M | WA | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 121336 | Krukiel | David | M | VA | US | 2 | Crazy Mountain 100M 2025 (36 hours) † |
| 108253 | Kruse | Caleb | M | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 127632 | Kruse | Christopher | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 103483 | Kruse | Jake | M | MD | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 126917 | Kruse | Kai | M | CA | US | 1 | Sean O'Brien 100km 2025 (17 hours) † |
| 126305 | Kruse | Laura | F | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 127857 | Kruse | Melissa | F | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 108154 | Krygier | Kenny | M | Delaware | US | 8 | Canal Corridor 100M 2025 (30 hours) † |
| 122019 | Krynski | Ian | M | MD | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 102413 | Krzysztofik | Marcin | M | GBR | GB | 2 | Bigfoot 206M 2025 (100 hours) † |
| 123258 | Ksenich | Hunter | M | PA | US | 2 | Mohican 100M 2025 (32 hours) |
| 127129 | Kshirsagar | Prachi | F | Alberta | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 122169 | Kubera | Paweł | M | Pomorskie | PL | 2 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 107628 | Kubernat | Zachary | M | FL | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 108323 | Kubiak | Edward | M | Ohio | US | 8 | Mohican 100M 2025 (32 hours) |
| 123024 | Kubo | Hiro | M | California | US | 2 | Quicksilver 100km 2025 (17 hours) |
| 125388 | Kubota | Eugene | N | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 126363 | Kubota | Masayuki | M | Chiba | JP | 1 | Mt Fuji 100M 2025 (46 hours) |
| 109435 | Kuchinsky | Kevin | M | PA | US | 4 | Burning River 100M 2025 (30 hours) |
| 112303 | Kudlacek | Ryan | M | TX | US | 4 | Lost Soul Ultra 100km 2025 (21 hours) |
| 126885 | Kudoba | Thomas | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 102962 | Kudron | Chris | M | CO | US | 8 | Run Rabbit Run 100M 2025 (36 hours) |
| 103296 | Kuebler | Christopher | M | PA | US | 32 | Eastern States 100M 2025 (36 hours) |
| 112132 | Kuehn | Philip | M | Baden-Wuerttemberg | DE | 8 | Bigfoot 206M 2025 (100 hours) † |
| 124857 | Kuhland | Allie | F | VA | US | 1 | Hellgate 100km 2024 (17 hours) |
| 111079 | Kuhlman | Emanuela | F | Elbasan | AL | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 122675 | Kuhn | Jimmy | M | AL | US | 2 | Pinhoti 100M 2025 (32 hours) |
| 122247 | Kuhn | Randi | F | IL - Illinois | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 106896 | Kuin | Sjaak | M | Noord Holland | NL | 32 | La H.O.T. du Père Noël 133km 2024 (25 hours) |
| 116935 | kuk | yu keung | M | Hong Kong | HK | 4 | Chiangmai by UTMB Elephant 100km 2024 (22 hours) |
| 113229 | Kulisch | Jonathan | M | Bavaria | DE | 4 | Zugspitz 100M 2025 (48 hours) |
| 127723 | Kull | Erik | M | Utah | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 125337 | kumada | keiji | M | Tokyoto | JP | 1 | Okushinano 100km 2025 (21 hours) |
| 126837 | Kumar | Anuj | M | NY | US | 1 | Vermont 100M 2025 (30 hours) |
| 126488 | Kumar | Nilesh | M | AZ | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 100957 | Kumeda | Andy | M | CA | US | 8 | Angeles Crest 100M 2025 (36 hours) † |
| 101654 | Kumlien | Jason | M | FL | US | 8 | Tahoe 202M 2025 (100 hours) † |
| 121067 | Kunaschk | Craig | M | NY | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 112510 | Kuneman | Nick | M | CO | US | 8 | Leona Divide 100km 2025 (17 hours) |
| 104048 | Kung | David | M | CA | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 100746 | Kunst | Erin | F | MI | US | 2 | Black Canyon 100km 2025 (17 hours) |
| 120506 | Kuntz | Ken | M | Pennsylvania | US | 2 | Eastern States 100M 2025 (36 hours) |
| 103552 | Kunz | Ryan | M | FL | US | 64 | Georgia Death Race 74M 2025 (24 hours) † |
| 120577 | Kunz | Scott | M | CA | US | 2 | Wasatch Front 100M 2025 (36 hours) † |
| 115983 | Kuo | Calvin | M | WA | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124884 | Kuo | Michael | M | CA | US | 1 | Leona Divide 100km 2025 (17 hours) |
| 101467 | Kuperstein | Char | F | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 114812 | Kupfer | Lindsey | F | WA | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 126594 | Kupfer | Zachary | M | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 126909 | Kupferberg | Jacques | M | Savoie | US | 1 | Mallorca by UTMB: Serra de Tramuntana (SDT) 135km 2025 (30 hours) |
| 127414 | Kupiński | Cezary | M | Dolny Slask | PL | 1 | Istria by UTMB 168km 2025 (46 hours) |
| 123177 | Kurihara | Yuta | M | Kanagawa | JP | 2 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 119057 | Kurmanbayev | Altay | M | Almaty | KZ | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 113200 | Kurschner | Kevin | M | oregon | US | 2 | Waldo 100km 2025 (18 hours) † |
| 124249 | Kurtin | Andrew | M | NY | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 123810 | Kurtz | Jennifer | N | NC | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 117223 | Kurz | Kevin | M | CA | US | 4 | Leona Divide 100km 2025 (17 hours) |
| 118981 | Kus | Marek | M | Czech republic | CZ | 4 | Salomon Ultra-Trail Hungary 112km 2025 (20 hours) |
| 125534 | Kusakabe | Alan | M | Maryland | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 117670 | Kusakabe | Shinobu | F | MD | US | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 125501 | Kusmik | Kyle | M | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 125043 | Kutikoff | Seth | M | VT | US | 1 | Vermont 100km 2025 (17 hours) |
| 124759 | Kutz | Brian | M | MN | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 101674 | Kuwabara | Yu | M | OR | US | 64 | Waldo 100km 2025 (18 hours) † |
| 119578 | Kuzmanovski | Anita | F | NY | US | 2 | Zion 100M 2025 (36 hours) † |
| 124983 | Kvalheim | Amelia | F | OH | US | 1 | Mohican 100M 2025 (32 hours) |
| 114346 | Kwasnik | Corin | M | VT | US | 4 | Vermont 100M 2025 (30 hours) |
| 113869 | Kwiatkowski | Dave | M | Virginia | US | 8 | Hellgate 100km 2024 (17 hours) |
| 102743 | Kwiatkowski | Richard | M | VA | US | 1 | Western States 100M 2025 (30 hours) † |
| 103666 | Kyle | Dougie | M | NZL | NZ | 64 | Taupo 100km 2025 (17 hours) |
| 124404 | Kyle | Shawn | M | MD | US | 1 | Burning River 100M 2025 (30 hours) |
| 127940 | Kyllönen | Katri-Maaria | F | Central Finland | FI | 1 | Nuts Ylläs Pallas 160km 2025 (35 hours) |
| 126074 | Kyte | Hilary | F | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 125275 | Kytonen | Deanna | F | WA | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 104494 | L'Oste-Brown | Lee | M | GA | US | 4 | Cruel Jewel 106M 2025 (48 hours) † |
| 127142 | Laasonen | Olli | M | Uusimaa | FI | 1 | Nuts Ylläs Pallas 160km 2025 (35 hours) |
| 127416 | LaBorde | Stacey | M | LA | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 113695 | LaBore | Brunza | M | CO | US | 2 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 113993 | Labutta | Emily | F | GA | US | 8 | Cruel Jewel 106M 2025 (48 hours) † |
| 108650 | Lacasse | Jean-Pierre | M | QC | CA | 8 | Quebec Mega Trail 135km 2025 (32 hours) |
| 114844 | Lacey | Austin | M | PA | US | 4 | Laurel Highlands 70.5M 2025 (20 hours) |
| 103292 | Lacey | Megan | F | WA | US | 8 | Waldo 100km 2025 (18 hours) † |
| 106898 | Lachance | Martin | M | QC | CA | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124048 | Lachapelle | Nathan | M | Quebec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 118699 | Lacher | Colin | N | Schwyz | CH | 4 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 112455 | Lacher | Nico | M | Schwyz | CH | 4 | Scenic Trail 130km 2025 (38 hours) |
| 100479 | Lackey | Jeremiah | M | TN | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 114203 | LaCour | Chris | M | CA | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 110806 | Lacoursiere | Francois | M | Quebec | CA | 1 | Western States 100M 2025 (30 hours) † |
| 111816 | Ladbrook | Michael | M | West Sussex | GB | 2 | Autumn 100M 2025 (28 hours) |
| 122062 | Ladera Burrero | Rodrigo | M | Madrid | ES | 2 | Gran Trail Peñalara 110km 2025 (25 hours) |
| 118235 | Ladovsky | Nathan | M | ON | CA | 2 | Angeles Crest 100M 2025 (36 hours) † |
| 126689 | LaDue | Chris | M | Washington | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 121654 | LaFerriere | kyle | M | VA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 124745 | Laferriere | Mark | M | NH | US | 1 | Cocodona 250M 2025 (125 hours) |
| 110036 | Lafferty | James | M | Virginia | US | 4 | Azores Trail Run (Whalers' Great Route) 118km 2025 (26 hours) |
| 124168 | Lafond | Roxanne | F | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 111582 | lafontaine | Jason | M | QC | CA | 8 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 124387 | Lafontaine | Sandra | F | Québec | CA | 1 | Bigfoot 206M 2025 (100 hours) † |
| 124349 | LaForme | Celeste | F | Idaho | US | 1 | IMTUF 100M 2025 (36 hours) |
| 111747 | Lafortune | Stéphanie | F | Québec | CA | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 106316 | Lafreniere | Audree | F | BC | CA | 16 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 107518 | LaFreniere | Jordan | M | MI | US | 4 | Mohican 100M 2025 (32 hours) |
| 108654 | Lagacé | Mathew | M | Quebec | CA | 16 | Quebec Mega Trail 135km 2025 (32 hours) |
| 102830 | Lagace | Philippe | M | AB | CA | 16 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 127357 | Lagace | Yannick | M | Quebec | US | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 126237 | Lagache | Clément | M | Bouches-du-Rhône | FR | 1 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 121721 | Laganière | Guillaume | M | Quebec | CA | 2 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 116573 | Lagerquist | Ryan | M | CO | US | 4 | Wasatch Front 100M 2025 (36 hours) † |
| 108159 | Lagerstrom | Elise | F | OR | US | 4 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 126728 | lagoa | jonathan | M | MA | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 126829 | Lague | Matthew | M | Colorado | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 109891 | LAHCEN | Moktar | M | Ile-de-France | FR | 1 | SwissPeaks 170km 2025 (58 hours) |
| 113800 | laher | zack | M | California | US | 8 | Run Rabbit Run 100M 2025 (36 hours) |
| 108150 | Lahille | Thomas | M | -- Sélectionner votre état -- | GB | 16 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 115156 | Lai | Brandon | M | Auvergne Rhône Alpes | FR | 4 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 116880 | Laidacker | Laura | F | PA | US | 4 | Eastern States 100M 2025 (36 hours) |
| 125421 | lake | lisa | F | Iowa | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 110747 | Lakhani | Adil | M | Illinois | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 107830 | Lakhram | Ryan | M | Alberta | CA | 8 | Fat Dog 120M 2025 (48 hours) † |
| 113128 | LAKOMIEC | ADAM | M | LONDON | GB | 8 | Autumn 100M 2025 (28 hours) |
| 115274 | Lallement | Johann | M | Haute Savoie | FR | 2 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 102091 | Lalus | Robert | M | WA | US | 128 | San Diego 100M 2025 (32 hours) † |
| 115191 | Lam | Alexander | M | AZ | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 100705 | Lam | Bryan | M | DC | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 126888 | Lam | Hoi Yee | F | Hong Kong | HK | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 114057 | LAM | Ka Shing | M | Hong Kong | HK | 4 | Swiss Alps 100km 2025 (22 hours) |
| 124340 | Lam | Marvin Ho To | M | ONTARIO | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 116194 | Lam | Mi | F | California | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 103284 | Lam | Otto | M | NJ | US | 32 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123718 | lamarche | etienne | M | Quebec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 103626 | Lamarque | Jean Thierry | M | AUS | AU | 16 | Guzzler Ultra 100km 2025 (24 hours) |
| 124641 | Lamb | Erin | F | New Jersey | US | 1 | Sean O'Brien 100km 2025 (17 hours) † |
| 124840 | Lamb | Nathan | M | AR | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 119607 | Lamb | Phil | M | VIC | AU | 2 | Taupo 100km 2025 (17 hours) |
| 115133 | Lambeck | Steven | M | Thueringen | DE | 4 | Zugspitz 106km 2025 (25 hours) |
| 105994 | Lambert | Carmen | F | AB | CA | 32 | Lost Soul Ultra 100km 2025 (21 hours) |
| 104890 | Lambert | Martin | M | AB | CA | 32 | Lost Soul Ultra 100km 2025 (21 hours) |
| 110153 | lambert | sydney | F | tx | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 106016 | Lambert -Sanders | Bree | F | CA | US | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124579 | Lamendour | Leo | M | Zurich | CH | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 111806 | Lamers | Ben | M | Wisconsin | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 126160 | Lammers | Kevin | M | GA | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 117657 | Lamond | Michael | M | Colorado | US | 2 | Hardrock 100M 2025 (48 hours) † |
| 124552 | Lamos | Sarah | F | New Brunswick | CA | 1 | Istria by UTMB 110km 2025 (24 hours) |
| 124408 | Lamouroux | Félix | M | Occitanie | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 111941 | Lamphier | Caryn | F | GA | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 107980 | Lampman | Gary | M | PA | US | 16 | Massanutten 100M 2025 (36 hours) † |
| 111369 | Lancaster | Craig | M | North Carolina | US | 8 | Hellbender 100M 2025 (40 hours) |
| 112894 | Lancia | Ilaria | F | MI | IT | 8 | Hardrock 100M 2025 (48 hours) † |
| 127163 | Lancke | Samantha | F | VA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 125157 | Land | Cale | M | Alabama | US | 1 | Mamba 100M 2024 (34 hours) |
| 124537 | Landau | Andrew | M | London | GB | 1 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 122446 | Landers | Mike | M | VIC | AU | 2 | Guzzler Ultra 100km 2025 (24 hours) |
| 126430 | Landis | Justin | M | NC | US | 1 | Umstead 100M 2025 (30 hours) |
| 116715 | Landis | Zach | M | PA | US | 4 | Never Summer 100km 2025 (23 hours) |
| 102108 | Landresse | Christian | M | LUX | LU | 2 | SwissPeaks 360km 2025 (156 hours) |
| 102584 | Landvatter | Joshua | M | UT | US | 2 | Wasatch Front 100M 2025 (36 hours) |
| 121238 | Landy | Tim | M | Devon | GB | 2 | TOR130 - Tot Dret 130km 2025 (44 hours) |
| 112682 | Landymore | Meg | F | MD | US | 8 | Bigfoot 206M 2025 (100 hours) |
| 126629 | Lane | Cameron | F | TX | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 111733 | Lane | David | M | MA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124206 | Lane | Frank | M | PA | US | 1 | Never Summer 100km 2025 (23 hours) |
| 126760 | Lane | Thomas | M | DC | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126630 | Lane | Tom | M | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 100269 | Lane | Yuri | M | CA | US | 16 | Pine to Palm 100M 2025 (34 hours) † |
| 101110 | Lang | Beth | F | CA | US | 8 | Waldo 100km 2025 (18 hours) † |
| 120372 | Lang | Chris | M | VA | US | 2 | Hellbender 100M 2025 (40 hours) † |
| 119713 | Lang | Susan | F | WA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 120677 | Langdale | Lisa | F | CA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124606 | Lange | Travis | M | Colorado | US | 1 | Never Summer 100km 2025 (23 hours) |
| 121882 | Langeard | Clément | M | France | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 123148 | Langendoen | Paul | M | Ontario | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 126243 | Langermann | Daniel | M | California | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 112526 | Langevin | Justin | M | QC | CA | 8 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 126590 | Langevin | Lucas | M | Sarthe | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 102291 | Langley | Clint | M | PA | US | 1 | Canal Corridor 100M 2025 (30 hours) |
| 124036 | Langley | Hayley | F | Hampshire | GB | 1 | Autumn 100M 2025 (28 hours) |
| 124521 | Langrish | David | M | Durham | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 102687 | Langton | Barrett | M | CO | US | 256 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127627 | Lankow | Benjamin | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 127907 | Lanphear | Charles | M | Missouri | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 109515 | Lanthier | Raymond | M | Quebec | CA | 16 | Quebec Mega Trail 135km 2025 (32 hours) |
| 103996 | Lantz | David | M | PA | US | 64 | Eastern States 100M 2025 (36 hours) |
| 115837 | lantzy | chris | M | AZ | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124653 | Lantzy | Patrick | M | Texas | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 104283 | Lanum | Phillip | M | CA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 124936 | Lanz | Susan | F | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) |
| 120538 | Lanzoni | Candice | F | MA | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 110600 | Lapachin | Larry | M | Michigan | US | 16 | Kettle Moraine 100M 2025 (30 hours) † |
| 122182 | Lapierre | Aliza | F | Vermont | US | 2 | Hardrock 100M 2025 (48 hours) † |
| 126247 | Laporte | Anthony | M | France | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 112764 | LaPorte | Paul | M | MD | US | 4 | Indiana 100M 2025 (30 hours) |
| 123703 | Lapp | Kobe | M | OH | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 122703 | Laputsina | Violetta | F | CO | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 118355 | Laramee-Gonzalez | Cameron | M | NY | US | 4 | Wasatch Front 100M 2025 (36 hours) † |
| 124587 | Lardy | Sam | M | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 107665 | Larick | Steven | M | PA | US | 16 | Eastern States 100M 2025 (36 hours) |
| 125193 | Lariviere | Samuel | M | Quebec | CA | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 101413 | Larkin | Greg | M | CA | US | 32 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 103575 | Larochette de Roeck | Francois | M | FRA | FR | 64 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 101338 | Larrivee | Mathieu | M | QC | CA | 1 | Western States 100M 2025 (30 hours) † |
| 127644 | Larsen | Nicholas | M | Utah | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 120855 | Larsen | Ole | M | Copenhagen | DK | 2 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 125298 | Larsen | Tanner | M | Utah | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 125129 | Larsen | Tori | F | FL | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 115971 | Larsen | Tyler | M | CA | US | 2 | Tahoe 202M 2025 (100 hours) † |
| 125776 | Larson | Adam | M | NV | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127751 | Larson | Chad | M | MN | US | 1 | Javelina Jundred 100M 2025 (30 hours) |
| 103753 | Larson | Christopher | M | NC | US | 8 | Yeti Virginia 100M 2025 (30 hours) † |
| 127892 | Larson | Dylan | M | TX | US | 1 | Moab 238M 2025 (108 hours) † |
| 120002 | Larson | Jake | M | Colorado | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 112559 | Larson | Jose | M | Texas | US | 8 | Rocky Raccoon 100M 2025 (30 hours) |
| 120245 | Larson | Laura | F | ID | US | 2 | Beaverhead 100km 2025 (20 hours) |
| 125653 | Larson | Nicholas | M | California | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 101740 | Larson | Ryan | M | CO | US | 128 | Hardrock 100M 2025 (48 hours) † |
| 108227 | Larson | Tracy | F | Colorado | US | 16 | High Lonesome 100M 2025 (37 hours) |
| 126929 | Larsson | Daniel | M | Skåne | SE | 1 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 126981 | Larsson | Daniel | M | N/A | SE | 1 | Täby Extreme Challenge 100M 2025 (30 hours) |
| 125587 | Lartigau | Matthias | M | Pyrénées atlantiques | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 116820 | Larwa | Ben | M | Vermont | US | 4 | Vermont 100M 2025 (30 hours) |
| 121811 | Larwa | Thomas | M | Wisconsin | US | 2 | Vermont 100km 2025 (17 hours) |
| 102916 | Lascar | Philippe | M | AUS | AU | 8 | Transjeju by UTMB 107km 2025 (25 hours) |
| 126792 | Laszloffy | Caleb | M | Montana | US | 1 | Crazy Mountain 100M 2025 (36 hours) † |
| 113018 | Latham | Carolyn | F | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 111646 | Latimer | Brandon | M | AZ | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 111174 | Latorre | Antonio | M | Lombardia | IT | 4 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 hours) |
| 121202 | Lau | Ho Ming | M | Hong Kong | HK | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 126422 | Lau | Stephen | M | Tokyo | JP | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 112646 | Lauder | Jesse | M | Colorado | US | 2 | Moab 238M 2025 (108 hours) † |
| 104833 | Laue | Joe | M | MN | US | 64 | Superior 100M 2025 (38 hours) † |
| 111159 | Laughton | Nicole | F | OK | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 123689 | Launay | Polly | F | IL | US | 1 | Hennepin 100M 2025 (30 hours) |
| 126989 | Laurel Medina | Adriana Carolina | F | Queensland | AU | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 106068 | Laurence | Doug | M | MI | US | 32 | Hood Hundred 100M 2025 (34 hours) |
| 126994 | Laurienzo | Kaylee | F | OH | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 111833 | Laurila | Toni | M | Uusimaa | FI | 8 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 124824 | Lautenschlager | Joshua | M | CT | US | 1 | Vermont 100M 2025 (30 hours) |
| 126812 | Lauw | Yung | M | Nil | HK | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 105899 | Lavallee | Michael | M | MI | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 111763 | Lavender Smith | Sarah | F | CO | US | 8 | Hardrock 100M 2025 (48 hours) |
| 116779 | Lavik | Damon | M | South Carolina | US | 4 | No Business 100M 2025 (34 hours) |
| 114151 | LAVING | Jean-Marc | M | Bretagne | FR | 8 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 109580 | LAVOIE | CHRISTIAN | M | Colorado | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 101922 | Lavoie | Jean-Paul | M | OR | US | 4 | No Business 100M 2025 (34 hours) |
| 106902 | Lavuri | Fabrizio | M | Yvelines | FR | 16 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 124471 | Law | Andy | M | London | GB | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127116 | Law | Benson | M | Ontario | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 104381 | Law | Graham | M | GBR | GB | 1 | Western States 100M 2025 (30 hours) † |
| 104617 | Law | Todd | M | CA | US | 2 | Leona Divide 100km 2025 (17 hours) |
| 109044 | Law | Wai | M | NY | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 121445 | Lawler | Rhys | M | New South Wales | AU | 2 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 113912 | Lawrence | Audrey | F | WA | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 106296 | Lawrence | Jake | M | MN | US | 4 | Pine to Palm 100M 2025 (34 hours) † |
| 121839 | Lawrie | Eric | M | Ontario | CA | 2 | Mohican 100M 2025 (32 hours) |
| 126692 | Lawson | Craig | M | BC | CA | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 126864 | Lawson | Darrell | M | South Carolina | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 125150 | Lawson | Tyler | M | UT | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 102114 | Lay | Christopher | M | MA | US | 32 | Twisted Branch 100km 2025 (20 hours) † |
| 105052 | Layfield | Dominick | M | CA | US | 128 | Black Canyon 100km 2025 (17 hours) † |
| 100750 | Lazareanu | Razvan | M | ON | CA | 64 | Massanutten 100M 2025 (36 hours) † |
| 125514 | Lazarit | Crispin | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 118639 | Lazarov | Plamen | N | Västra Götaland | SE | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125477 | Lazic | Marina | F | Serbia | RS | 1 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 102762 | Le | Khang | M | CA | US | 32 | Cuyamaca 100km 2025 (17 hours) † |
| 123299 | Le | Tuan | M | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 126694 | Le Barre | Maxime | M | Lyon | FR | 1 | Trail du Saint-Jacques by UTMB 130km 2025 (28 hours) |
| 115199 | Le Bras | Erwan | M | Kanagawa | JP | 4 | Mt Fuji 100M 2025 (46 hours) |
| 118095 | Le Duigou | Sébastien | M | Fribourg | CH | 2 | Scenic Trail 130km 2025 (38 hours) |
| 124318 | Le Hingrat | Albin | M | QC | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 111167 | Le Leivre | Harley | M | BC | CA | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 127225 | Le Map | Margaux | F | Haute-Savoie | FR | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 103235 | Le Pagne | David | M | CA | US | 32 | Angeles Crest 100M 2025 (36 hours) † |
| 127594 | Le thi | Hang | M | Vũng Tàu | VN | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 115650 | Leach | Sophie | F | Montana | US | 4 | Never Summer 100km 2025 (23 hours) |
| 122140 | Leadsom | David | M | Devon | GB | 2 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 125200 | Lealess | Dylan | M | British Columbia | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 123468 | Leaman | Craig | M | NH | US | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 117922 | Learn | William | M | NC | US | 4 | No Business 100M 2025 (34 hours) |
| 121637 | Learned | David | M | CA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 126927 | Lebada | Teodor | M | Suceava | RO | 1 | Istria by UTMB 110km 2025 (24 hours) |
| 113885 | lebailly | frederic | M | Martinique | MQ | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 104857 | Lebeau | Jean-Philippe | M | QC | CA | 32 | Grindstone by UTMB 100km 2025 (18 hours) |
| 112736 | LeBell | Aaron | M | OR | US | 4 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 101981 | Leber | Celia | F | ID | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 101231 | Leblanc | Dane | M | MA | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 113756 | LeBlanc | Kristi | F | Oregon | US | 8 | HURT 100M 2025 (36 hours) † |
| 120371 | Lebowitz | Sam | M | New York | US | 2 | Worlds End 100km 2025 (19 hours) |
| 127330 | Leclerc | Rick | M | MA | US | 1 | Hellbender 100M 2025 (40 hours) |
| 126084 | Leclercq | Maxime | M | Ile de France | FR | 1 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 114771 | Lecuisinier | Aurélien | M | France | FR | 2 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 117748 | LECUYOT | stephane | M | Ile-De-France | FR | 4 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 124721 | Lederer | Katlyn | F | Pennsylvania | US | 1 | Eastern States 100M 2025 (36 hours) |
| 125074 | Ledesma | Jorge Fernando | M | Buenos Aires | AR | 1 | Patagonia 100M 2025 (42 hours) |
| 116538 | Ledoux | Matthew | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 101220 | Lee | Aaron | M | OR | US | 16 | Pine to Palm 100M 2025 (34 hours) † |
| 125292 | Lee | Aaron | M | California | US | 1 | Oso Negro 100km 2025 (24 hours) |
| 108144 | Lee | Andre | M | AZ | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 122921 | Lee | Andrew | M | New South Wales | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 101368 | Lee | Anthony | M | CO | US | 128 | Run Rabbit Run 100M 2025 (36 hours) † |
| 111139 | Lee | Antonio | M | ON | CA | 8 | Sulphur Springs 100km 2025 (18 hours) |
| 119615 | Lee | Barbara | F | AZ | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 116931 | Lee | Ben | M | CA | US | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 125806 | Lee | Boram | M | Kyuggi-do | KR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127262 | Lee | Brent | M | Phuket | TH | 1 | Pong Yaeng Trail 160km 2025 (48 hours) |
| 113259 | Lee | Cheuk Hin Raymond | M | New Territories | HK | 8 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 122158 | lee | chunsic | M | Inchoen | KR | 2 | Transjeju by UTMB 150km 2025 (37 hours) |
| 106904 | Lee | Craig | M | 4 | Indiana 100M 2025 (30 hours) | ||
| 101455 | Lee | David | M | CO | US | 2 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 123870 | Lee | David | M | TX | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 100210 | Lee | Glenn | M | SGP | SG | 8 | Mt Fuji 100M 2025 (46 hours) |
| 127847 | Lee | Gustin | M | ND | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 118780 | Lee | Haneul | F | seoul | KR | 4 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 127378 | LEE | HYUNSEUNG | M | Seoul | KR | 1 | Mt Fuji 100M 2025 (46 hours) |
| 125234 | Lee | Im | F | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 113522 | Lee | James | M | NY | US | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 125900 | lee | jee hee | F | Gangnam | KR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 110689 | Lee | Jong Geun | M | CA | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126512 | Lee | Josh | M | IN | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 125293 | lee | jun kuan | M | Singapore | SG | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 119902 | Lee | Kok Cheu | M | Singapore | SG | 1 | Zugspitz 106km 2025 (25 hours) |
| 121172 | Lee | Michele | F | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 126207 | Lee | Nick | M | MA | US | 1 | Vermont 100M 2025 (30 hours) |
| 105700 | Lee | Scott | M | VA | US | 16 | Rim to River 100M 2025 (32 hours) † |
| 105103 | Lee | Sean | M | CA | US | 64 | Angeles Crest 100M 2025 (36 hours) † |
| 127034 | Lee | Shelby | F | WA | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 118404 | LEE | TAEGYEOM | M | 43, Gomdallae-ro 15ga-gil, Gangseo-gu | KR | 2 | Transjeju by UTMB 150km 2025 (37 hours) |
| 120161 | Lee | Tristan | M | AZ | US | 2 | Cascade Crest 100M 2025 (34 hours) |
| 107979 | Lee | vivian | F | California | US | 16 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 118616 | Lee | Wen Ren | M | BSB | BN | 4 | Mt Fuji 100M 2025 (46 hours) |
| 127091 | Lee-smith | Lucy | F | Wales | GB | 1 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 hours) |
| 107999 | Leech | David | M | Berkshire | GB | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124893 | Lees | Travis | M | CA | US | 1 | Leona Divide 100km 2025 (17 hours) |
| 122593 | Lefaive | Rocque | M | Idaho | US | 2 | Beaverhead 100km 2025 (20 hours) |
| 110169 | LeFebvre | Andre | M | Alberta | CA | 16 | Lost Soul Ultra 100km 2025 (21 hours) |
| 119437 | Lefevere | Dennis | M | Antwerp | BE | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 120519 | Lefkowitz | Mallory | F | Montana | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 101506 | Lefriec | Andy | M | WA | US | 32 | IMTUF 100M 2025 (36 hours) † |
| 127235 | Leftwich | Benjamin | M | CA | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 126529 | Legare | Mike | M | SC | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 119761 | Lege | Romain | M | Normandie | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124038 | Légier | Florent | M | Ile de france | FR | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 119946 | Legier | Gregory | M | ME | US | 2 | Vermont 100M 2025 (30 hours) |
| 113147 | Legrand | Marieve | F | British Columbia | CA | 8 | Fat Dog 120M 2025 (48 hours) † |
| 121211 | Lehec | Martin | M | Yvelines | FR | 2 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 121533 | Lehman | Ben | M | AZ | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 125852 | Lehman | JT | M | WA | US | 1 | IMTUF 100M 2025 (36 hours) |
| 104234 | Lehmann | John | M | PA | US | 8 | Bigfoot 206M 2025 (100 hours) † |
| 109635 | Lehmann | Susann | F | Bavaria | DE | 4 | Transgrancanaria 125km 2025 (28 hours) |
| 125837 | Lehmann | Tyler | M | WI | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 118689 | Lehr | Sara | F | CALIFORNIA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 110759 | Lei | Hua | M | NY | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 120826 | Leigh | Jon | M | GBR | GB | 2 | West Highland Way 95M 2025 (30 hours) |
| 103087 | Leigh | Lindsay | F | PA | US | 32 | Rim to River 100M 2025 (32 hours) † |
| 124154 | Leischow | Nicholas | M | GA | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 127265 | Leiseth | Max | M | WY | US | 1 | Never Summer 100km 2025 (23 hours) |
| 124261 | Leishman | Fraser | M | Alberta | CA | 1 | Lost Soul Ultra 100M 2025 (33 hours) † |
| 120460 | Leiterman | Michael | M | WI | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 108569 | Lemcke | Rachel | F | Virginia | US | 16 | High Lonesome 100M 2025 (37 hours) |
| 121282 | Lemieux-Girard | Olivier | M | Québec | US | 2 | Quebec Mega Trail 135km 2025 (32 hours) |
| 115678 | Lemos | Helder | M | Lisboa | PT | 4 | Patagonia 100M 2025 (42 hours) |
| 124002 | Lenahan | Chris | M | OR | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 115642 | Lenauer | Iris | F | ON | CA | 4 | Sulphur Springs 100M 2025 (30 hours) |
| 108562 | Lendick | Mathieu | M | Quebec | CA | 16 | Salomon Ultra-Trail Hungary 112km 2025 (20 hours) |
| 111491 | Lenertz | Henning | M | Deutschland | DE | 8 | Zugspitz 106km 2025 (25 hours) |
| 116152 | Lenning | Jade | F | BC | CA | 4 | Fat Dog 120M 2025 (48 hours) † |
| 122125 | Lennon | Alec | M | Queensland | AU | 2 | Buffalo Stampede 100km 2025 (23 hours) |
| 104696 | Lennon | James | M | AUS | AU | 64 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 109487 | Lenoir | Thierry | M | Haute Savoie | FR | 8 | Grand Raid Ventoux by UTMB 124km 2025 (30 hours) |
| 127426 | Lent | Andrew | M | Colorado | US | 1 | Never Summer 100km 2025 (23 hours) |
| 119955 | Leonard | Dan | M | Illinois | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 107586 | Leonard | Doug | M | OR | US | 16 | Waldo 100km 2025 (18 hours) † |
| 126339 | Leonard | Kenneth | M | WA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 103591 | Leonard | Lucja | F | Mid Lothian | GB | 32 | Rio Del Lago 100M 2025 (30 hours) |
| 127453 | Leonard | Mary | F | IL | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 120335 | Leonard | Ryan | M | Utah | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 122974 | Leonardi | Mandy | F | AL | US | 1 | Mamba 100M 2024 (34 hours) † |
| 123201 | Leone | Frank | M | VA | US | 2 | Hellgate 100km 2024 (17 hours) |
| 115225 | Leone | Nick | M | California | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 124035 | Leoni | Michele | M | Italy | IT | 1 | Morenic Trail 119km 2025 (22 hours) |
| 126705 | lepage | anthony | M | OCCITANIE | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127325 | Lepage | Julien | M | Aisne | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 110620 | Leppälä | Mika | M | Finland | FI | 16 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 119293 | Leppan | Jordan | M | Kwazulu Natal | ZA | 1 | Karkloof 100M 2025 (36 hours) |
| 126020 | Leppert | Cory | M | CO | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 116278 | Leppert | Dylan | M | Arizona | US | 4 | Tahoe 202M 2025 (100 hours) † |
| 124309 | Lerch | Joshua | M | CA | US | 1 | Leona Divide 100km 2025 (17 hours) |
| 127893 | Leroy | Benoit | M | Rhone | FR | 1 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 126049 | LEROY | Martin | M | GRAND EST | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 121326 | Lerro | Angelica | F | NJ | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 119890 | Lesage | Julie | F | Quebec | CA | 2 | Istria by UTMB 110km 2025 (24 hours) |
| 126463 | Lesh | Robyn | F | CO | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 115641 | Lesh | Scott | M | PA | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 100326 | Lesniak | John | M | IL | US | 64 | Canyons by UTMB 104km 2025 (20 hours) |
| 127464 | Leśniak | Kamil | M | WIELKOPOLSKIE | PL | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 112752 | Lesniak | Michael | M | Illinois | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 115256 | Lesniak | Michal | M | Devon | GB | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125371 | Lesport | Angélique | F | La Réunion | RE | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 124916 | Lessware | Nicholas | M | London | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 118453 | LESUEUR | Tanguy | M | MARNE | PF | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 127941 | Letalien | Marjolaine | F | Québec | CA | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 115406 | Letendre | Rémi | M | QC | CA | 4 | Grindstone by UTMB 100M 2025 (36 hours) |
| 115994 | Letort | Régis | M | Bretagne | FR | 2 | Grand Raid des Pyrénées - Tour de Cirques 123km 2025 (40 hours) |
| 123134 | Lettner | Brian | M | ID | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 123107 | Lettner | Dennis | M | Baden-Württemberg | DE | 2 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 123631 | Leung | Bruce | M | Massachusetts | US | 1 | Vermont 100M 2025 (30 hours) |
| 126687 | Leung | Ivy | F | Hong Kong Island | HK | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 120493 | Leung | Megan | F | California | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 103505 | Leung | Solomon | M | CA | US | 64 | Bigfoot 206M 2025 (100 hours) † |
| 125172 | Leung | Therese | F | British Columbia | CA | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 104970 | Leung | Warrick | M | CA | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 125034 | Leupold | Tomas | M | Buenos Aires | AR | 1 | Patagonia 110km 2025 (27 hours) |
| 109513 | Levasseur | Keith | M | MD | US | 4 | Grindstone by UTMB 100M 2025 (36 hours) |
| 115319 | Levasseur | Marie-Line | F | Quebec | CA | 2 | Quebec Mega Trail 135km 2025 (32 hours) |
| 120579 | Leveau | Emeric | M | Isère | FR | 2 | Quebec Mega Trail 135km 2025 (32 hours) |
| 125271 | Levy | Andrew | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 127203 | Lewen | Alexander | M | PA | US | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 107789 | Lewis | Austin | M | CA | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 119621 | Lewis | Chad | M | CA | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 126309 | Lewis | Christopher | M | Tx | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 124176 | Lewis | James | M | Florida | US | 1 | Cruel Jewel 106M 2025 (48 hours) † |
| 112211 | Lewis | Jesse | M | California | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 125263 | Lewis | Kate | F | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 110736 | Lewis | Matthew | M | wa | US | 4 | Cuyamaca 100km 2025 (17 hours) |
| 108578 | Lewis | Sara | F | CA | US | 1 | Umstead 100M 2025 (30 hours) |
| 116322 | Lewis | Theresa | F | SD | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 107644 | Leyva | Marco | M | CA | US | 4 | Cuyamaca 100km 2025 (17 hours) † |
| 112778 | Leyva | Miguel | M | California | US | 8 | Pine to Palm 100M 2025 (34 hours) |
| 112779 | LG | Dann | M | NY | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 124106 | Li | Andrew | N | British Columbia | CA | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 119633 | Li | Chengquan | M | california | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 125961 | LI | CHIUN HAN | M | Dayuan | TW | 1 | Formosa Trail 104km 2024 (28 hours) |
| 122844 | Li | Dongchen | M | Beijing | CN | 2 | Ninghai Ultra Trail 109km 2025 (24 hours) |
| 102744 | Li | Dongyang | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 127781 | Li | Hao | M | WI | US | 1 | Tunnel Hill 100M 2024 (30 hours) |
| 124203 | Li | Jasmine | F | MA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125372 | Li | Jian | M | Beijing | CN | 1 | Nike ACG Ultra-Trail Chongli 100km 2025 (29 hours) |
| 116078 | Li | Jonathan | M | Hawaii | US | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124885 | Li | Kongpan | M | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 127478 | Li | Mui Chun | F | Hong Kong | HK | 1 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 116661 | Li | Sara Hong | F | BC | CA | 4 | Fat Dog 120M 2025 (48 hours) † |
| 104924 | Li | Terence | M | NY | US | 128 | Leadville Trail 100M 2025 (30 hours) |
| 113861 | Li | Yang | M | MO | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 111459 | Li | Yiran | M | CO | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 124872 | Liao | Anna | F | CO | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 125549 | Liao | Xiaoxue | F | California | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 125305 | Liba | Orly | F | CA | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 123369 | Libby | Jesse | M | Colorado | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 121725 | Liburdi | Francesco | M | FR | IT | 2 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 124489 | Lichtenstein | Eric | M | Aargau | CH | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 110963 | Lickteig | Kaci | F | NE | US | 2 | HURT 100M 2025 (36 hours) † |
| 110138 | Lidster | Clint | M | QLD | AU | 8 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 102402 | Liebowitz | Carissa | F | GA | US | 16 | Rocky Raccoon 100M 2025 (30 hours) |
| 120253 | Liechty | Madison | F | MT | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 105179 | Liechty | Steve | M | MT | US | 128 | Crazy Mountain 100M 2025 (36 hours) † |
| 124446 | Liedle | Laura | F | California | US | 1 | Sean O'Brien 100km 2025 (17 hours) † |
| 126842 | Liefting | Ambrose | M | British Columbia | CA | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 117085 | Lien | Ole Christian | M | Oslo | NO | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124560 | Lierman | Liz | F | Colorado | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 110566 | Lietwiler | Nathan | M | DE | US | 2 | Vermont 100M 2025 (30 hours) |
| 127107 | Lievois | Jennifer | F | NM | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 121815 | Lightbody | Nicholas | M | British Columbia | CA | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124829 | Ligus | Carrie | F | PA | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 127638 | Lim | Adrian | M | Essex | GB | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 107424 | Lim | Arnold | M | Wisconsin | US | 16 | Grindstone by UTMB 100km 2025 (18 hours) |
| 121857 | Lim | Handa | M | Singapore | SG | 2 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 104807 | Lim | Jyh Hann | M | MYS | MY | 8 | Malaysia Ultra Trail by UTMB 100km 2024 (26 hours) |
| 127835 | Lim | Rongyang | M | Singapore | SG | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 100997 | Lim | Soo Jung | F | CA | US | 4 | Leona Divide 100km 2025 (17 hours) |
| 116670 | Limbach | Jörg | M | Baden-Württemberg | DE | 4 | Zugspitz 100M 2025 (48 hours) |
| 114019 | Limbaugh | Jamie | F | AL | US | 8 | No Business 100M 2025 (34 hours) |
| 123449 | Lin | Alex | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 126839 | LIN | GANGYU | M | GUAND DONG | CN | 1 | Mt Fuji 100M 2025 (46 hours) |
| 127284 | Lin | Han | M | CA | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 112755 | LIN | YIHAN | M | Taichung | TW | 2 | Formosa Trail 104km 2024 (28 hours) |
| 125438 | lin | yuehan | M | Zhejiang | CN | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 118851 | Lind | Cody | M | ID | US | 4 | Tarawera by UTMB 102km 2025 (17 hours) |
| 110329 | lind | george | M | Arizona | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 121333 | Lindberg | Erik | M | SC | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 124798 | Lindberg Sørensen | Dennis | M | Nordjylland | DK | 1 | Istria by UTMB 168km 2025 (46 hours) |
| 123994 | Lindel | Claudius | M | Baden-Württemberg | DE | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 115235 | Lindh | William | M | Vastra Gotaland | SE | 2 | Swiss Alps 100M 2025 (50 hours) |
| 126281 | Lindsay | Anthony | M | Kentucky | US | 1 | No Business 100M 2025 (34 hours) |
| 125646 | Lindsey | Angela | F | TX | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 124254 | Lindsley | Tori | F | MI | US | 1 | No Business 100M 2025 (34 hours) |
| 120099 | Lindvall | Jake | M | Nebraska | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 124946 | Line | Erik | M | Ca | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 125850 | Linehan | Erin | F | CO | US | 1 | Cocodona 250M 2025 (125 hours) |
| 119882 | Ling | Cassandra | F | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 113669 | Lingenfelter | Daniel | M | CA | US | 8 | Pine to Palm 100M 2025 (34 hours) † |
| 114896 | Linne | Benjamin | M | Maryland | US | 4 | Twisted Branch 100km 2025 (20 hours) † |
| 111351 | Lipari | Aly | F | MI | US | 4 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 102331 | Lipeles | Julia | F | TN | US | 64 | Yeti Virginia 100M 2025 (30 hours) † |
| 124157 | Lipka | Jiri | M | Czech republic | CZ | 1 | Swiss Alps 100km 2025 (22 hours) |
| 110945 | LIPOVSKY | TIM | M | CA | US | 8 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 115445 | LiPuma | Eric | M | VT | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 125631 | Lis | Marcin | M | Cambridgeshire | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 125133 | Lishakova | MICHAELA | F | Zilina | SK | 1 | Black Canyon 100km 2025 (17 hours) † |
| 102209 | Liss | Maiken | F | DEU | DE | 32 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 125964 | Liston | Jodie | F | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 120325 | Litschewski | Jeanette | F | CO | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 125597 | Little | Elizabeth | F | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127005 | Little | George | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 120437 | Liu | Ai Dong | F | British Columbia | CA | 2 | Black Canyon 100km 2025 (17 hours) † |
| 127624 | liu | bo | M | sichuan | CN | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 103322 | Liu | Ed | M | CA | US | 32 | Rio Del Lago 100M 2025 (30 hours) |
| 125336 | LIU | JIAN FENG | M | ASIA | HK | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 115610 | Liu | Jicheng | M | MD | US | 4 | Umstead 100M 2025 (30 hours) |
| 122427 | liu | jun | F | shanghai | CN | 1 | Western States 100M 2025 (30 hours) † |
| 125674 | Liu | Shuyi | F | Michigan | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 105718 | Liu | Yang | M | CHN | CN | 8 | Hong Kong 100K 100km 2025 (23 hours) |
| 122618 | Liu | Ying | F | Shanghai | CN | 2 | Ninghai Ultra Trail 109km 2025 (24 hours) |
| 111978 | Liu | Zitao | M | NY | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 121858 | Liukku | Arttu | M | Uusimaa | FI | 2 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 127239 | Livicker | Bryan | M | AB | CA | 1 | Lost Soul Ultra 100km 2025 (21 hours) |
| 123607 | Livingston | Dean | M | AB | CA | 1 | Lost Soul Ultra 100km 2025 (21 hours) |
| 104297 | Livingston | Debbie | F | CT | US | 32 | Vermont 100km 2025 (17 hours) |
| 105486 | Livingstone | Matthew | M | PA | US | 32 | Canal Corridor 100M 2025 (30 hours) † |
| 103226 | Livingstone | Peter | M | NM | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 126378 | Lizec | Jiri | M | Czech Republik | CZ | 1 | Ultra Trail Vipava Valley 165km 2025 (46 hours) |
| 104238 | Llano | Carlos | M | ESP | ES | 64 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 115504 | Lloyd | Patrick | M | South Carolina | US | 2 | Umstead 100M 2025 (30 hours) |
| 121032 | Lo | Austin | M | NY | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 106625 | Loane | Kim | M | AUS | AU | 32 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 125434 | Locatelli | Ludovic | M | Jura | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 126589 | Loch-Test | Sarah | F | TX | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 104208 | Locke | Joshua | M | AZ | US | 64 | Black Canyon 100km 2025 (17 hours) † |
| 126156 | Locke | Philip | M | PA | US | 1 | Eastern States 100M 2025 (36 hours) |
| 120024 | Locke | Sam | M | NH | US | 2 | Indiana 100M 2025 (30 hours) |
| 110641 | Loder | Daniel | M | CA | US | 16 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 101202 | Loesch | Gordon | M | PA | US | 32 | Rim to River 100M 2025 (32 hours) † |
| 104870 | Lofgren | Christopher | M | MN | US | 16 | Superior 100M 2025 (38 hours) † |
| 113901 | Lofthus | John | M | CA | US | 8 | Rio Del Lago 100M 2025 (30 hours) |
| 124525 | Logan | Chase | M | VA | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 104410 | Logan | Cody | M | CA | US | 8 | Pine to Palm 100M 2025 (34 hours) † |
| 113749 | Logan | Derek | M | NM | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 116793 | Logelin | Joseph | M | BC | CA | 4 | Hood Hundred 100M 2025 (34 hours) |
| 108847 | Logsdon | Benjamin | M | WA | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 101376 | Logsdon | Cory | M | NE | US | 64 | Canyons by UTMB 104km 2025 (20 hours) |
| 126064 | Lohiniva | Karoliina | F | Connecticut | US | 1 | Nuts Ylläs Pallas 160km 2025 (35 hours) |
| 125279 | Lohmier | Ethan | M | Wisconsin | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 111606 | Lohmier | Peter | M | Wisconsin | US | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 117559 | Lohn | Andy | M | Minnesota | US | 2 | Superior 100M 2025 (38 hours) † |
| 110168 | Lohn | Erika | F | MN | US | 8 | Hennepin 100M 2025 (30 hours) † |
| 125112 | Lohse | Sam | M | Utah | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 121984 | Loiko | Kristin | F | Massachusetts | US | 2 | Vermont 100km 2025 (17 hours) |
| 125962 | Loiseau | Jeremie | M | Paris | FR | 1 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 123723 | Lombardi | Federico | M | Girona | ES | 1 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 102013 | Lombardi | Vincent | M | FL | US | 64 | No Business 100M 2025 (34 hours) |
| 123544 | Lomeli | Michelle | F | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 107827 | Loncar | Travis | M | MD | US | 8 | Vermont 100M 2025 (30 hours) |
| 112331 | Londero | Daniel | M | UD | IT | 8 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 105459 | Loney | Rhea | F | PA | US | 8 | Crazy Mountain 100M 2025 (36 hours) † |
| 120978 | Long | Brian | M | CA | US | 2 | San Diego 100M 2025 (32 hours) † |
| 108250 | Long | David | M | California | US | 16 | Bigfoot 206M 2025 (100 hours) |
| 103017 | Long | Kimani | M | NC | US | 256 | Canal Corridor 100M 2025 (30 hours) † |
| 118617 | Long | Rachel | F | WY | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126475 | Long | Timmy | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 114988 | Long | Trever | M | OR | US | 4 | Mountain Lakes 100M 2025 (30 hours) † |
| 111952 | Longabaugh | Reid | M | TX | US | 8 | Bigfoot 206M 2025 (100 hours) † |
| 119131 | Longacre | Caleb | M | Ca | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 108322 | Longhurst | Glen | M | Tennessee | US | 8 | Yeti Virginia 100M 2025 (30 hours) † |
| 126153 | Longley | David | M | Ontario | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 124342 | Longo | Luke | M | NJ | US | 1 | Eastern States 100M 2025 (36 hours) |
| 124326 | Longson | Sam | M | NV | US | 1 | Never Summer 100km 2025 (23 hours) |
| 117113 | Loomis | Alex | M | HI | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 122759 | Loomis | Gregory | M | VA | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 101060 | Lopez | Javier | M | CA | US | 64 | Miwok 100km 2025 (15:30:59 hours) |
| 117611 | Lopez | Joaquin | M | Pichincha | EC | 4 | Mt Fuji 100M 2025 (46 hours) |
| 111086 | Lopez | Mayra | F | CA | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 101081 | Lopez | Tyler | F | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 126701 | LOPEZ COTTO | JOSE | M | Puerto Rico | PR | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 127059 | Lord | Brennen | M | Oregon | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 125685 | Lorentsen | Mathias | M | Oslo | NO | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 127637 | Lorenz | Eva | F | NSW | AU | 1 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 124116 | Lorenzen | John | M | CO | US | 1 | Bighorn 100M 2025 (35 hours) |
| 121544 | Lori | Christie | F | Qld | AU | 2 | Buffalo Stampede 100km 2025 (23 hours) |
| 121075 | Lorimer | Scott | M | Scotland | GB | 2 | Fat Dog 100km 2025 (24 hours) |
| 107808 | Lorin | Aurelien | M | QC | CA | 1 | Western States 100M 2025 (30 hours) † |
| 127088 | Loschiavo | Vince | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 116191 | Losonsky | Martin | M | Slovakia | SK | 4 | Transgrancanaria 125km 2025 (28 hours) |
| 125684 | Lostracco | Marcus | M | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 127702 | Lottmann | Zachary | M | California | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 115627 | Lotz | Missy | F | Oregon | US | 2 | Waldo 100km 2025 (18 hours) † |
| 115015 | Loubersac | Pierre | M | Quebec | CA | 4 | Mohican 100M 2025 (32 hours) |
| 127506 | Louden | Anna | F | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 120459 | Loudermilk | Jessica | F | SC | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 123215 | Louis | Anthony | M | Herult | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127130 | Louis | Despres | M | France | FR | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 123749 | LOUIS | Jérôme | M | Ille-et-Vilaine | FR | 1 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 107576 | Louis-Ferdinand | Robert | M | MI | US | 8 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 127810 | Loulier | Pauline | F | CA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 114577 | Lourenço | Carlos Eduardo | M | NA | PT | 2 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 101214 | Louttit | Gary | M | BC | CA | 128 | Fat Dog 120M 2025 (48 hours) † |
| 124334 | Louwagie | Andrea | F | MN | US | 1 | Superior 100M 2025 (38 hours) † |
| 117021 | Love | Guy | M | CO | US | 2 | Hardrock 100M 2025 (48 hours) † |
| 103183 | Loveall | Justin | M | AZ | US | 32 | Yeti Virginia 100M 2025 (30 hours) † |
| 114750 | Lovera | Pierluigi | M | Italy | IT | 4 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 117199 | Löw | Johannes | M | Baden Württemberg | DE | 4 | Zugspitz 106km 2025 (25 hours) |
| 125594 | Low | Zhen Ning | M | CA | US | 1 | San Diego 100M 2025 (32 hours) † |
| 100023 | Lowe | Adam | M | AUS | AU | 8 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 105349 | Lowe | Matt | M | ON | CA | 8 | Sedona Canyons 125M 2025 (52 hours) |
| 126241 | Lowe | Oliver | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 124246 | Lowe-Wylde | Ian | M | Alberta | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 121834 | Lowenfels | Henry | M | TN | US | 2 | San Diego 100M 2025 (32 hours) † |
| 125352 | Lowry | Lydia | F | Berkshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 120046 | Lowry | Matthew | M | Nevada | US | 2 | Zion 100km 2025 (19 hours) |
| 100553 | Loyd | Jason | M | TN | US | 128 | Pinhoti 100M 2025 (32 hours) † |
| 121060 | Loyd | Kathleen | F | CA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 124418 | Lozier | Aaron | M | CO | US | 1 | Hellbender 100M 2025 (40 hours) † |
| 120754 | Lozinski | Mark | M | PA | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 124278 | Lozoya | Edgar | M | Texas | US | 1 | Moab 238M 2025 (108 hours) † |
| 112223 | Lu | Qi | F | California | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 125256 | Lu | Vi | N | CA | US | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 125838 | Lu | Zhaoxia | F | GA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 112275 | Lu | Zhenfei | M | CA | US | 8 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 112652 | Lubin | Todd | M | New York | US | 4 | Vermont 100km 2025 (17 hours) |
| 126730 | Luboff | Kaitlyn | F | PA | US | 1 | Javelina Jundred 100M 2025 (30 hours) |
| 103052 | Lucarelli | Elizabeth | F | NC | US | 1 | Western States 100M 2025 (30 hours) † |
| 120871 | Lucas | Benjamin | M | AZ | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 127503 | Lucas | George | M | England | US | 1 | South Downs Way 100M 2025 (30 hours) |
| 114268 | Lucas | John | M | CA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 101085 | Lucas-Lucas | Adam | M | GBR | GB | 32 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 112795 | Luciani-Cervantes | Joseph | M | California | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 126425 | Luckett | John | M | Indiana | US | 1 | Indiana 100M 2025 (30 hours) |
| 106917 | Luden | Nick | M | 8 | Grindstone by UTMB 100M 2025 (36 hours) | ||
| 101158 | Ludlow | Brock | M | OR | US | 1 | Western States 100M 2025 (30 hours) † |
| 111150 | Ludlow | Bryan | M | AB | CA | 8 | Sulphur Springs 100km 2025 (18 hours) |
| 118524 | Luebeck | Mark | M | Montana | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 118664 | Luebke | Chris | M | WI | US | 4 | Canal Corridor 100M 2025 (30 hours) † |
| 104900 | Lugari | Ercole | M | GBR | GB | 4 | Lakeland 100M 2025 (40 hours) |
| 125744 | Lui | Jonathan | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 103527 | Lui | Kwok Wing | M | JPN | JP | 1 | FunTrails Chichibu & Okumusashi 105km 2024 (30 hours) |
| 125317 | Lüke | Tobias | M | Nordrhein-Westfalen | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 124290 | Lukens | Penn | M | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 126588 | Luloff | Greg | M | WA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 113107 | Lum | Ooi Leng | F | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 127152 | Lunden | Sara | F | WV | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 104332 | Lundgren | Zac | M | MN | US | 2 | Superior 100M 2025 (38 hours) † |
| 102989 | Lundy | Kristin | F | VT | US | 4 | Vermont 100km 2025 (17 hours) |
| 102600 | Lunger | Matthew | M | CO | US | 32 | Run Rabbit Run 100M 2025 (36 hours) |
| 126436 | Lunger | Nick | M | Ma | US | 1 | Vermont 100km 2025 (17 hours) |
| 126836 | Lunnie | Brent | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 118855 | LUO | BINHAO | M | British Columbia | CA | 4 | Mt Fuji 100M 2025 (46 hours) |
| 104542 | Luo | Canhua | M | CHN | CN | 4 | Black Canyon 100km 2025 (17 hours) † |
| 126682 | Luppol | Ievgen | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 117489 | Luscher | DJ | M | NM | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 102297 | Luschin | Ian | M | OH | US | 1 | Western States 100M 2025 (30 hours) † |
| 126408 | Lusk | Adam | M | Queensland | AU | 1 | Guzzler Ultra 100km 2025 (24 hours) |
| 116911 | Lussier | Alexis | M | Quebec | CA | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 127193 | Lustila | Misty | F | MN | US | 1 | Mamba 100M 2024 (34 hours) † |
| 110887 | Lusty | Matt | M | QLD | AU | 4 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 124045 | Lütke Lanfer | Tobias | M | Hessen | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 108575 | Luu | Tin | M | VA | US | 2 | Vermont 100M 2025 (30 hours) |
| 126715 | Luzny | Katarzyna | F | Krakow | PL | 1 | Penyagolosa 106km 2025 (26 hours) |
| 103193 | Ly | Lam | M | CA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 101346 | Lye | Ian | M | CHE | CH | 64 | Mt Fuji 100M 2025 (46 hours) |
| 103302 | Lyle | Chris | M | AR | US | 32 | Arkansas Traveler 100M 2025 (30 hours) |
| 101039 | Lymath | Greg | M | CA | US | 16 | Waldo 100km 2025 (18 hours) † |
| 123243 | Lymath | McKenna | F | California | US | 2 | Waldo 100km 2025 (18 hours) † |
| 119958 | Lynas | Matthew | M | Cheshire | GB | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 120172 | Lynch | Catherine | F | Texas | US | 2 | Cocodona 250M 2025 (125 hours) |
| 109453 | Lynch | Doug | M | Kentucky | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 118106 | Lynch | Jeremy | M | Pa | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 124283 | Lynch | Phil | M | Lancashire | GB | 1 | Autumn 100M 2025 (28 hours) |
| 117313 | Lynch | Robert | M | MA | US | 4 | Swiss Alps 100M 2025 (50 hours) |
| 126047 | Lynch | Tom | M | Cumbria | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 106922 | Lyndon | Tim | M | NSW | AU | 32 | Guzzler Ultra 100km 2025 (24 hours) |
| 119456 | Lyons | David | M | MA | US | 2 | Vermont 100M 2025 (30 hours) |
| 114837 | Lyons | Emily | F | NC | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 117401 | Łyjak | Błażej | M | Dolnośląskie | PL | 2 | Javornika 105km 2025 (24 hours) |
| 127849 | M Alterman | Daniel | M | TN | US | 1 | Mamba 100M 2024 (34 hours) † |
| 127589 | M Green | Audra | F | MT | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125405 | M Powell | Barbara | F | MN | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 119662 | MA | GAVIN | M | VIC | AU | 2 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 108206 | MA | JIN | M | ON | CA | 8 | Sulphur Springs 100M 2025 (30 hours) |
| 122913 | Ma | Nu | F | WA | US | 2 | Waldo 100km 2025 (18 hours) |
| 126139 | Ma | Svieda | F | SK | CA | 1 | Black Canyon 100km 2025 (17 hours) † |
| 126292 | Mabe | Christopher | M | CO | US | 1 | Swiss Alps 100M 2025 (50 hours) |
| 112786 | Mabvuta | Gumi | N | TN | US | 4 | No Business 100M 2025 (34 hours) |
| 123798 | Maccabee | Lara | F | Idaho | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 106527 | Macchi | Andrea | M | ITA | IT | 8 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 107836 | Macdonald | Adrian | M | Colorado | US | 1 | Western States 100M 2025 (30 hours) † |
| 127688 | macdonald | Elizabeth | F | NS | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 126370 | MacDonald | Hamish | M | New South Wales | AU | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 120846 | MacDonald | Kienan | M | BC | CA | 2 | Crazy Mountain 100M 2025 (36 hours) † |
| 126332 | MacDonald | Richard | M | Alberta | CA | 1 | Lost Soul Ultra 100M 2025 (33 hours) † |
| 118282 | Macfarlane | Colin | M | Oregon | US | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 119905 | MacFarlane | Jason | M | On | CA | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 124676 | MacFarlane | Kerri | F | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 115496 | Macfarlane | Melanie | F | Victoria | AU | 4 | Tarawera by UTMB 100M 2025 (36 hours) |
| 119824 | Macfarlane | Paul | M | England | GB | 2 | Lakeland 100M 2025 (40 hours) |
| 101211 | Macgibbon | Andrew | M | NH | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 118424 | MacGregor | Jeff | M | California | US | 2 | Zion 100M 2025 (36 hours) † |
| 119837 | MACHIDA | HARUKA | F | Saitama | JP | 2 | Dalmacija Ultra Trail 122km 2025 (32 hours) |
| 124896 | Macht | Wendelin | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 112449 | Machus | Hunter | M | Montana | US | 4 | Hood Hundred 100M 2025 (34 hours) |
| 102625 | Macias | Ismael | M | CA | US | 128 | Canyons by UTMB 104km 2025 (20 hours) |
| 101205 | Macias | Jose | M | CA | US | 16 | Miwok 100km 2025 (15:30:59 hours) |
| 112848 | Macias Diaz | Albert | M | BARCELONA | ES | 4 | TOR130 - Tot Dret 130km 2025 (44 hours) |
| 104146 | Macintire | Amy | F | TN | US | 16 | No Business 100M 2025 (34 hours) |
| 120994 | Mack | Kristoffer | M | New York | US | 2 | Vermont 100M 2025 (30 hours) |
| 104636 | Mackey | Monte | M | AZ | US | 128 | Leona Divide 100km 2025 (17 hours) |
| 126641 | Mackinnon | Stuart | M | TEXAS | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125173 | Mackowiak | Danielle | F | MA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 109933 | MacLean | Carl | M | CA | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 118926 | MacLean | Steven | M | ID | US | 4 | Cocodona 250M 2025 (125 hours) |
| 124647 | MacLeod | Andrew | M | MA | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 104891 | MacMahon | Caolan | F | CO | US | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 112707 | MacNabb | Erin | F | Texas | US | 8 | Leadville Trail 100M 2025 (30 hours) |
| 125040 | MacNeil | Mike | M | BC | CA | 1 | Black Canyon 100km 2025 (17 hours) † |
| 103927 | Macnulty | Charles | M | CA | US | 2 | Run Rabbit Run 100M 2025 (36 hours) † |
| 126683 | Macpherson | Rachel | F | Scotland | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 124895 | MacRae | Adrian | M | Quebec | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 116314 | Macy | Brenden | M | Colorado | US | 1 | Indiana 100M 2025 (30 hours) |
| 107944 | Maddock | Michael | M | VA | US | 8 | C & O Canal 100M 2025 (30 hours) † |
| 109586 | Madeira | Luis | M | Lisboa | PT | 8 | Trail de Conímbriga Terras de Sicó 111km 2025 (24 hours) |
| 124497 | Madison | Andrew | M | Wyoming | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 118940 | MADONO | AKIO | M | 東京都 | JP | 4 | Bear, The 100M 2025 (36 hours) † |
| 115888 | Madono | Mari | F | Tokyo | JP | 4 | Bear, The 100M 2025 (36 hours) † |
| 120225 | Madre | Elliot | M | MD | US | 2 | Hellbender 100M 2025 (40 hours) † |
| 115360 | Madsen | Brandon | M | Utah | US | 4 | Wasatch Front 100M 2025 (36 hours) † |
| 112792 | Madsen | Monica | F | CA | US | 8 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 124644 | Madson | Bethany | F | LA | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 122613 | Maeda | Akihiro | M | hiroshima | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 117821 | Maeda | Yuhei | M | Kumamoto | JP | 2 | SkyView Ultra Trail 140km 2025 (34 hours) |
| 127098 | Maes | Hans | M | Flanders | BE | 1 | Swiss Alps 100M 2025 (50 hours) |
| 119644 | MAFFETT | ASHLEY | F | NV | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 121770 | Maffey | Jenna | F | ID | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 123430 | Magda | Cody | M | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 119903 | Magee | James | M | VA | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 123366 | MaGee | Kendall | M | TX | US | 2 | Mamba 100M 2024 (34 hours) † |
| 123363 | MaGee | Michaela | F | Texas | US | 2 | Mamba 100M 2024 (34 hours) † |
| 120722 | Magee | Riley | M | Saskatchewan | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 124135 | Magee | Will | M | Cheshire | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 122031 | Magermans | marcel | M | Groningen | NL | 2 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 123867 | Maggs | Sean | M | New Hampshire | US | 1 | Vermont 100M 2025 (30 hours) |
| 119002 | maghoo | jayprakashsingh | M | plaine williems | MU | 4 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 125393 | Mägi | Maarja | F | Ailakkikuja | EE | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 125340 | Mägi | Risto | M | Pohjois-Savo | FI | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 125103 | Magill | Declan | M | QLD | AU | 1 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 125255 | Magnuson | Cody | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124912 | Magnusson | Jed | M | New Mexico | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 123754 | MAGNUSSON | JULIA | F | MA | US | 1 | Vermont 100km 2025 (17 hours) |
| 108735 | Magolon | Jesse | M | Maryland | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 124392 | Maguire | Timothy | M | Minnesota | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 116817 | Maher | Kyla | F | MT | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 105284 | Maher | Peter | M | AUS | AU | 8 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 126513 | Maherka | Vasyl | M | Noord-Holland | NL | 1 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 125469 | MAHISTRE | Alexandre | M | France | FR | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 102821 | Mahn | Morgan | M | MO | US | 1 | Western States 100M 2025 (30 hours) † |
| 105191 | Mahoney | Christopher | M | IL | US | 16 | Kettle Moraine 100M 2025 (30 hours) † |
| 113562 | Mahoney | John | M | AZ | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 124144 | Mahoney | John | M | CO | US | 1 | Hellbender 100M 2025 (40 hours) † |
| 123730 | mai | andreas | M | Saarland | DE | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 119805 | Maich | Andrew | M | Tayside | GB | 2 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 101911 | Maier | Jenny | F | OR | US | 128 | Miwok 100km 2025 (15:30:59 hours) |
| 119527 | mailey | samuel | M | ca | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) |
| 127567 | Mailhot | Robin | M | Québec | CA | 1 | Bigfoot 206M 2025 (100 hours) † |
| 108040 | Main | Barry | M | PA | US | 16 | Bighorn 100M 2025 (35 hours) |
| 113566 | Mains | Allan | M | QLD | AU | 8 | Surf Coast Century 100km 2025 (17 hours) |
| 102587 | Mais | Jason | M | VA | US | 8 | Hellgate 100km 2024 (17 hours) |
| 100552 | Maisel | Andrew | M | DC | US | 32 | Grindstone by UTMB 100km 2025 (18 hours) |
| 123668 | Maison | Romain | M | Marne | FR | 1 | Trail du Saint-Jacques by UTMB 130km 2025 (28 hours) |
| 108126 | Maize | Ryan | M | Oregon | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 127487 | Majeri | Alexandre | M | Rhone Alpes | FR | 1 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 110506 | Majors | Mark | M | GA | US | 4 | Canal Corridor 100M 2025 (30 hours) † |
| 111560 | Mak | Jensen | M | New South Wales | AU | 2 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 112923 | Maki-Richards | Jordan | F | New South Wales | AU | 8 | Buffalo Stampede 100km 2025 (23 hours) |
| 123683 | Makim | Ayesha | F | Western Province | ZA | 1 | Ultra Trail Drakensberg 100km 2025 (23 hours) |
| 105072 | Makovsky | Eric | M | CO | US | 32 | Pinhoti 100M 2025 (32 hours) |
| 124468 | Makrutzki | Luca | M | Baden-Württemberg | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 115843 | Malacrida | Riccardo | M | Varese | IT | 4 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 124826 | Malcolm-Kert | Brandy | F | OR | US | 1 | Fat Dog 100km 2025 (24 hours) |
| 120587 | Maldonado | Estevan | M | Colorado | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 127223 | Malecha | Dale | M | WI | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 111742 | Malecha | Ryan | M | Tennessee | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 103839 | Maleedy | Christian | M | GBR | GB | 2 | North Downs Way 100M 2025 (30 hours) |
| 101595 | Malherbe | Martin | M | ZAF | ZA | 32 | Ultra Trail Drakensberg 163km 2025 (48 hours) |
| 117091 | MALIGE | Aurélie | F | Bourgogne Franche-Comté | FR | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 111523 | MALIGE | JULIEN | M | france | FR | 8 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 109820 | Malina | Mike | M | WA | US | 8 | Bighorn 100M 2025 (35 hours) |
| 124969 | Maljournal | Patrice | M | Isere | FR | 1 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 110038 | Malkowski | Eric | M | UT | US | 16 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126698 | Mallet | Clement | M | Auvergne-Rhône-Alpes | FR | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 126226 | mallette | vincent | M | QC | CA | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 125614 | Malley | Alyssa | F | HI | US | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 102990 | Mallon | Matthew | M | AK | US | 64 | Cuyamaca 100km 2025 (17 hours) † |
| 120056 | Mallone | Selene | F | Ontario | CA | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 105118 | Malmstrom | Christian | M | SWE | SE | 16 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 121521 | Malone | Sarah | F | CO | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 111461 | Malone | Steven | M | Co down | GB | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 118693 | Maloney | Cree | M | MT | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 119624 | Maloy | Chad | M | NY | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 123797 | Maltez | Ruderis | M | Virginia | US | 1 | Vermont 100km 2025 (17 hours) |
| 100793 | Maltz | Taylor | M | NC | US | 32 | Rocky Raccoon 100M 2025 (30 hours) |
| 125938 | Maly | Andreas | M | Styria | AT | 1 | Kerry Way Ultra 193km 2025 (40 hours) |
| 123930 | Malyovany | Edward | M | Ohio | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 125699 | Malzbender | Kristina | F | NY | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 111455 | MAMADA | MITSUKAZU | M | N/A | JP | 8 | HURT 100M 2025 (36 hours) † |
| 127186 | Mance | Steve | M | DC | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 125510 | Manchip | Ty | M | MI | US | 1 | Burning River 100M 2025 (30 hours) |
| 107338 | Mancino | Abraham | M | Ohio | US | 4 | Tahoe 202M 2025 (100 hours) † |
| 122647 | MANDEKIĆ | MARIN | M | Croatia | HR | 2 | Dalmacija Ultra Trail 122km 2025 (32 hours) |
| 104528 | Mandrell | Jeff | M | OR | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 112162 | Mang | Cameron | M | Saskatchewan | CA | 4 | Canadian Death Race 118km 2025 (24 hours) |
| 103572 | Mangan | Tom | M | PA | US | 4 | Brazos Bend 100M 2024 (32 hours) |
| 106382 | Manganello | Michael | M | CO | US | 32 | TOR130 - Tot Dret 130km 2025 (44 hours) |
| 115378 | Mangler | Sarah | F | Bavaria | DE | 2 | Eiger Ultra Trail 250km 2025 (90 hours) |
| 103358 | Mangold | Zandy | M | NY | US | 16 | Grindstone by UTMB 100M 2025 (36 hours) |
| 124931 | Mangum | Anna | F | New Hampshire | US | 1 | Vermont 100km 2025 (17 hours) |
| 115614 | Manimbo | Daniel | M | CO | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 100865 | Maniscalco | Reid | M | CO | US | 4 | Wasatch Front 100M 2025 (36 hours) † |
| 111841 | Mankekar | Durgesh | M | Massachusetts | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 105088 | Manley | Dirk | M | CA | US | 4 | Sean O'Brien 100km 2025 (17 hours) † |
| 124598 | Mann | Richard | M | Illinois | US | 1 | No Business 100M 2025 (34 hours) |
| 126466 | Mann | Robert | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 110621 | Mannhard | Jacquie | F | CO | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 126333 | Manning | Noreen | F | pa | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 110360 | MANOS | GEORGIOS | M | GREECE | GR | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 120238 | Mansfield | Ryan | M | WA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 102859 | Mansky | Brian | M | WI | US | 64 | Canyons by UTMB 104km 2025 (20 hours) |
| 119916 | Manson | Paul | M | Scotland | GB | 2 | Swiss Alps 100M 2025 (50 hours) |
| 125466 | Mantoni | Tue | M | Copenhagen | DK | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 116064 | manzano | janssen | M | ca | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 127484 | Mao | Angela | F | Tokyo | JP | 1 | Okushinano 100km 2025 (21 hours) |
| 110587 | Maquinalez | Felicia | F | California | US | 8 | Quicksilver 100km 2025 (17 hours) † |
| 127110 | Mar | Damon | M | Kansas | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 121633 | Mara | Bogdan Stefan | M | Bucharest | RO | 2 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 hours) |
| 124194 | Maradan | Xavier | M | Vaud | CH | 1 | SwissPeaks 100km 2025 (28 hours) |
| 122562 | maran | stefano | M | VI | IT | 2 | Tuscany Crossing 103km 2025 (21 hours) |
| 125154 | Marble | Amber | F | MD | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 124242 | Marble | Derek | M | Maryland | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 127518 | MARCAILLOU | Rémi | M | France | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 102791 | Marcelino | Cristiano | M | RJ | BR | 8 | Zion 100km 2025 (19 hours) |
| 115749 | MARCHAND | Benjamin | M | Loire Athlantique | FR | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125186 | Marchand | Max | M | Alberta | CA | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 111953 | Marchand | Michael | M | WA | US | 4 | Cascade Crest 100M 2025 (34 hours) |
| 119498 | Marchand | Pierre | M | Bretagne | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 122331 | Marchelli | Simone | M | Italy | IT | 2 | Morenic Trail 119km 2025 (22 hours) |
| 105263 | Marcil | Simon | M | QC | CA | 1 | Western States 100M 2025 (30 hours) † |
| 125649 | Marcu | Emanuel | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 101193 | Marek | Desiree | F | AZ | US | 128 | Wasatch Front 100M 2025 (36 hours) † |
| 116178 | Margherio | Tony | M | IN | US | 2 | Canal Corridor 100M 2025 (30 hours) † |
| 119035 | Margozzini | Jose | M | Santiago | CL | 4 | Tarawera by UTMB 102km 2025 (17 hours) |
| 125792 | Margozzini Valdes | Santiago | M | Santiago | CL | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 127529 | Margulies | Rebecca | F | CA | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 102019 | Marinas | James | M | CA | US | 8 | Dinosaur Valley 100km 2024 (22 hours) |
| 127023 | Marinkovich | Matt | M | Ca | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 120784 | Marino | Christian | M | NY | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 105327 | Marino | Matt | M | WA | US | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 122357 | Marino | Matt | M | OR | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 108380 | Marion | Stacey | F | WA | US | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 109041 | Marion | Zachary | M | UT | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 108533 | Mark | Cox | M | Leicestershire | GB | 2 | Lakeland 100M 2025 (40 hours) |
| 112759 | Mark | Ron | M | Alberta | CA | 4 | Lost Soul Ultra 100M 2025 (33 hours) † |
| 123341 | Markevicus | Andy | M | IL | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 127551 | Markey | Jason | M | IL | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 123883 | Marks | Sam | M | California | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 119474 | Marlot | Julien | M | CA | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 110426 | Marmer Weiss Hohwü | Lukas | M | Aarhus | DK | 4 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 101240 | Marmorato | Alessandro | M | GBR | GB | 64 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 119871 | Marois | Boone | M | NC | US | 2 | Hellbender 100M 2025 (40 hours) † |
| 127620 | Marot | Jean | M | Liege | BE | 1 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 114108 | MAROT | Vincent | M | Massachusetts | US | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 111822 | Marquez | Alfonso | M | Yvelines | FR | 4 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 127480 | MARQUEZ | ERICK | M | CORTES | HN | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 125832 | Marrone | Stephen | M | Oregon | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 110024 | Marsh | Donald | M | WV | US | 4 | Indiana 100M 2025 (30 hours) |
| 109533 | Marsh | Justin | M | CA | US | 16 | Quicksilver 100km 2025 (17 hours) † |
| 116682 | Marsh | Kevin | M | ID | US | 2 | Cascade Crest 100M 2025 (34 hours) |
| 121435 | Marsh | Oliver | M | England | GB | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 115436 | Marshalek | Robert | M | Ohio | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 117228 | Marshall | Christina | F | North Carolina | US | 4 | Cuyamaca 100km 2025 (17 hours) |
| 125267 | Marshall | Harry | M | British Columbia | CA | 1 | Fat Dog 120M 2025 (48 hours) † |
| 119496 | Marshall | Janet | F | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126725 | Marshall | Justin | M | GA | US | 1 | Cruel Jewel 106M 2025 (48 hours) † |
| 113171 | Marshall | Kerry-Ann | F | Western Cape | ZA | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 105186 | Marshall | Kristin | F | CO | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 119390 | Marshall | Mary | F | Berkshire, England | GB | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 104631 | Marshall | Simon | M | ARE | AE | 64 | Tuscany Crossing 103km 2025 (21 hours) |
| 126382 | Martelle | Raymond | M | WA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 114379 | Marten | Scott | M | CO | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 117829 | Marti | Isabella | F | Solothurn | CH | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125047 | Martin | Billy | M | NY | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 124520 | Martin | Blake | M | AZ | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 104498 | Martin | Brook | F | AUS | AU | 256 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 125249 | Martin | Chris | M | QLD | AU | 1 | Guzzler Ultra 100km 2025 (24 hours) |
| 120096 | Martin | Christian | M | Quebec | CA | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 122167 | Martin | Daniel | M | Otago | NZ | 2 | Taupo 100km 2025 (17 hours) |
| 126148 | Martin | David | M | Kentucky | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 123931 | Martin | David | M | OR | US | 1 | Mountain Lakes 100M 2025 (30 hours) † |
| 125525 | Martin | Devin | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 115098 | Martin | Elton | M | Ohio | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 120166 | Martin | Erik | M | Massachusetts | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 101230 | Martin | Frédéric | M | CHE | CH | 8 | Eiger Ultra Trail 250km 2025 (90 hours) |
| 122933 | Martin | Greta | F | DC | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 123542 | Martin | James | M | Northants | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 123984 | Martin | James | M | North Carolina | US | 1 | Long Haul 100M 2025 (30 hours) |
| 119433 | Martin | Julian | M | Prince Edward Island | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 124519 | Martin | Landon | M | TX | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 117291 | Martin | Mickey | M | Colorado | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) |
| 102993 | Martin | Nicholas | M | CA | US | 16 | Leona Divide 100km 2025 (17 hours) |
| 100485 | Martin | Nick | M | CO | US | 128 | Black Canyon 100km 2025 (17 hours) † |
| 125694 | Martin | Nick | M | KS | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 113012 | MARTIN | Philippe | M | Vaucluse | FR | 2 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 123664 | Martin | Regis | M | Singapore | SG | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 127592 | Martin | Ryan | M | FL | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 116136 | Martin | Scott | M | OR | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 106509 | Martin | Shane | M | UT | US | 16 | Wasatch Front 100M 2025 (36 hours) † |
| 104185 | Martin-Consani | Debbie | F | GBR | GB | 1 | Western States 100M 2025 (30 hours) † |
| 126090 | Martineau | John | M | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 125952 | Martinelli | Chiara | F | Italy | IT | 1 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 hours) |
| 118303 | Martines | Jamie | F | PA | US | 2 | No Business 100M 2025 (34 hours) |
| 111846 | Martinez | Brett | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 127705 | Martinez | Christian | M | HI | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) |
| 127870 | Martinez | Gabriel | M | Colorado | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 100779 | Martinez | Jadd | M | CA | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 101607 | Martinez | Julian | M | CA | US | 8 | Rio Del Lago 100M 2025 (30 hours) |
| 108603 | Martinez | Leopoldo | M | Tx | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 108300 | Martinez | Michael | M | PA | US | 8 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 103234 | Martinez | Michael | M | CO | US | 64 | High Lonesome 100M 2025 (37 hours) |
| 112327 | Martinez | Pedro | M | CA | US | 4 | Pine to Palm 100M 2025 (34 hours) † |
| 124977 | Martinez | Valeria | F | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 125054 | Martínez Caño | Enrique | M | 608 | ES | 1 | Gran Trail Peñalara 110km 2025 (25 hours) |
| 109363 | Martini | Vittorio | M | PG | US | 4 | Tuscany Crossing 103km 2025 (21 hours) |
| 120390 | Martinig | Chase | M | BC | CA | 2 | Cocodona 250M 2025 (125 hours) |
| 113060 | Martinov | Martin | M | Sofia | BG | 8 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 124056 | Martins | Rodrigo | M | NSW | AU | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 125573 | Martise | Brendan | M | Colorado | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 126844 | MARUYAMA | TAKAHISA | M | TOKYO | JP | 1 | Okushinano 100km 2025 (21 hours) |
| 124068 | Marvin | Taylor | M | Iowa | US | 1 | Never Summer 100km 2025 (23 hours) |
| 127517 | Mary | William | M | QC | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 100856 | Marzen | Mark | M | CO | US | 128 | Bear, The 100M 2025 (36 hours) † |
| 126976 | Mas Ortega | Teix | M | Lleida | ES | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125895 | Masad | Melanie | F | CA | US | 1 | Zion 100km 2025 (19 hours) |
| 104055 | MASAKI | KOSUKE | M | 日本 | JP | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 125409 | Mascunan | Marcel | M | Queensland (QLD) | AU | 1 | Blackall 100km 2025 (18 hours) |
| 122804 | Masip Cosin | Sergi | M | Catalonia | ES | 2 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 111591 | Maslanka | Zack | M | Illinois | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 116229 | Maslo | Iuliia | F | NY | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 126996 | Masoero | Luca | M | Lombardy | IT | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 123863 | Mason | Cara | F | VA | US | 1 | Massanutten 100M 2025 (36 hours) |
| 124629 | Mason | David | M | London | GB | 1 | Thames Path 100M 2025 (30 hours) |
| 114830 | Mason | Justin | M | TN | US | 4 | No Business 100M 2025 (34 hours) |
| 109671 | Mason | Madeline | F | IN | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 108826 | Mason | Matthew | M | Kent | GB | 2 | Autumn 100M 2025 (28 hours) |
| 113240 | Mason | Scott | M | AZ | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 126735 | Massaro | Marc | M | Arizona | US | 1 | Javelina Jundred 100M 2025 (30 hours) |
| 109148 | Massey | Travis | M | CO | US | 8 | Never Summer 100km 2025 (23 hours) |
| 112989 | Massie | Jason | M | TX | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 117441 | Massingill | Regina | F | TX | US | 4 | Dinosaur Valley 100M 2024 (35 hours) † |
| 125798 | Masters | Anthony | M | CA | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 113174 | Masterton | Ian | M | Wellington | NZ | 2 | Mountain Lakes 100M 2025 (30 hours) † |
| 100058 | Mastrodemos | Nick | M | CA | US | 32 | Angeles Crest 100M 2025 (36 hours) † |
| 109645 | Mastrotto | Roberto | M | VI | IT | 16 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 112029 | Mastry | Lindsay | F | AZ | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 110743 | Masuku | Mgcini | M | Waikato | NZ | 8 | Tarawera by UTMB 100M 2025 (36 hours) |
| 120671 | Masur | Stephanie | F | Alberta | CA | 2 | Zion 100km 2025 (19 hours) |
| 123081 | Mata | Cristina | F | Panama | US | 2 | Pinhoti 100M 2025 (32 hours) † |
| 117988 | Matcham | Jed | M | CA | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 126138 | Matchullis | Dan | M | AB | CA | 1 | Hood Hundred 100M 2025 (34 hours) |
| 120474 | Matena | Valerie | F | NC | US | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 120362 | Mateski | Scott | M | WI | US | 2 | Never Summer 100km 2025 (23 hours) |
| 126957 | Matfey | Chris | M | MI | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 123617 | mathamel | Alessio | M | Valle d aosta | IT | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 114927 | Matheson | Rory | M | UK | GB | 4 | Autumn 100M 2025 (28 hours) |
| 116293 | Mathews | Adam | M | Wisconsin | US | 4 | Hennepin 100M 2025 (30 hours) † |
| 114880 | Mathews | Cameron | M | Colorado | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 120682 | Mathias | Shane | M | CO | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 110864 | Mathieson | Danny | M | Virginia | US | 2 | Hellbender 100M 2025 (40 hours) † |
| 115632 | Mathis | Verity | F | FL | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 125066 | MATHISON | JAMES | M | CA | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 125349 | Matić | Toni | M | Zagreb | HR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127879 | Matison | Richard | M | Victoria | AU | 1 | Surf Coast Century 100km 2025 (17 hours) |
| 101744 | Matjas | Luke | M | CA | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 122907 | Matlick | Justin | M | MT | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 123813 | Matousek | Zdenek | M | Czech Republic | CZ | 1 | Krakonosova Stovka 100km 2025 (22 hours) |
| 122376 | Matson | Cheryl | F | MN | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 119486 | Matson | Jeffrey | M | OR | US | 2 | Mountain Lakes 100M 2025 (30 hours) † |
| 112574 | Matsuda | Yoshiro | M | California | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 125215 | Matsumura | Kazuki | M | Hirakatashi | JP | 1 | Aso Volcano Trail 115km 2025 (28 hours) |
| 125117 | Matsunaga | Jared | M | CA | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 118195 | Matsuoka | Jason | M | California | US | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 107740 | Matsuoka | Shogo | M | California | US | 8 | Quicksilver 100km 2025 (17 hours) † |
| 105313 | Matta | Matthew | M | FL | US | 32 | High Lonesome 100M 2025 (37 hours) |
| 124152 | Mattar | Nadia | F | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 118870 | mattas | Cecilia | F | Queensland | US | 2 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 125775 | Mattern | Saskia | F | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 103144 | Matthews | Clifford | M | NM | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 121833 | Matthews | Laura | F | Tasman | NZ | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124196 | Matthias | Philip | M | Baden Württemberg | DE | 1 | SwissPeaks 100km 2025 (28 hours) |
| 119681 | Matulovich | Nick | M | Surrey | GB | 2 | North Downs Way 100M 2025 (30 hours) |
| 124030 | MATUSEVICIUS | LAIMONAS | M | VILNIUS | LT | 1 | Zugspitz 106km 2025 (25 hours) |
| 122186 | Matyiko | Gabriel | M | MD | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 126191 | Matz | Quentin | M | Liège | BE | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 124851 | Matzke | Brian | M | Ky | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 109873 | Mau | Maddie | F | CA | US | 16 | Quicksilver 100km 2025 (17 hours) † |
| 126890 | Mauch | Tyler | M | Arkansas | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 117003 | MAUDUIT | Arnaud | M | Hong Kong Island | HK | 4 | Hong Kong 100K 100km 2025 (23 hours) |
| 124557 | Mauge | Lesly | M | Québec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 126727 | Maune | Brett | M | CO | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 126851 | Maurer | Marco | M | Rheinland-Pfalz | DE | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 120806 | Mauser | Emily | F | AZ | US | 2 | San Diego 100M 2025 (32 hours) † |
| 104725 | Mavaracchio | Fulvio | M | ITA | IT | 2 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 101996 | Mavricos | Chantal | F | CO | US | 32 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 126983 | maxime | viarengo | M | alpes de haute provence | FR | 1 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 122880 | Maxwell | Anne | F | Nebraska | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 116671 | May | Alice | F | Wa | US | 1 | Western States 100M 2025 (30 hours) † |
| 127515 | May | Thomas | M | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 126248 | May | Wyndham | M | California | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 127447 | Mayer | Matthew | M | OR | US | 1 | Cascade Crest 100M 2025 (34 hours) |
| 104959 | Maynard | John | M | CA | US | 16 | Cuyamaca 100km 2025 (17 hours) † |
| 118754 | Maynard | Ross | M | Missouri | US | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 125733 | Mayo | Kelsey | F | NV | US | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 116946 | Mayorga | Aura | F | California | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123085 | MAYSLICH | Mikael | M | Ariège | FR | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 115683 | Maza | Alejandro | M | Ciudad de México | MX | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 100830 | Mazzenga | Amanda | F | WA | US | 32 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 103014 | Mc Duff | Stephane | M | QC | CA | 4 | Sulphur Springs 100M 2025 (30 hours) |
| 126246 | Mc Hugh-Dolan | John | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 125942 | mc Sweeney | Michael | M | Cork | IE | 1 | Kerry Way Ultra 193km 2025 (40 hours) |
| 117689 | McAlister | Davis | M | CA | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 113879 | McAlister | John | M | Ontario | CA | 8 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 119814 | McAneny | Ciaran | M | Hertfordshire | GB | 2 | Autumn 100M 2025 (28 hours) |
| 113079 | McArthur | John | M | Scotland | GB | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 103674 | McArthur | William | M | NY | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 124019 | McArtor | Cory | M | KY | US | 1 | San Diego 100M 2025 (32 hours) † |
| 123835 | McAulay | Ian | M | TX | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 127886 | McBride | Devin | M | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 121951 | McBride | Kris | M | California | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 108493 | McBride | Paul | M | New South Wales | AU | 8 | Buffalo Stampede 100km 2025 (23 hours) |
| 119254 | McBride | Tabitha | F | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 115400 | McBride | Theresa | F | Oklahoma | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 100410 | Mccabe | Jay | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 111593 | McCabe | Kevin | M | NC | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 108116 | McCabe | Tyler | M | AZ | US | 8 | Sedona Canyons 125M 2025 (52 hours) |
| 101901 | McCaffrey | Stephen | M | MA | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 125657 | McCalley | Mike | M | TX | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 115461 | McCarl | Chad | M | North Carolina | US | 1 | Western States 100M 2025 (30 hours) † |
| 125965 | McCarthy | Aine | F | Cork | IE | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 126607 | McCarthy | Alan | M | Cork | IE | 1 | Fat Dog 100km 2025 (24 hours) |
| 126351 | McCarthy | Daniel | M | MA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 124039 | McCarthy | David | M | Central Bedfordshire | GB | 1 | Autumn 100M 2025 (28 hours) |
| 114554 | mccarthy | joe | M | GA | US | 8 | Massanutten 100M 2025 (36 hours) † |
| 122274 | McCarthy | Steve | M | CO | US | 2 | Massanutten 100M 2025 (36 hours) † |
| 108148 | McCartney | David | M | IN | US | 2 | Long Haul 100M 2025 (30 hours) † |
| 117982 | McCatharn | Colin | M | Louisiana | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 124691 | McCauley | Connor | M | NC | US | 1 | Hellbender 100M 2025 (40 hours) † |
| 112390 | McClain | Matthew | M | OR | US | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 127526 | McClanahan | Caden | M | West Virginia | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 113419 | McClellan | Patrick | M | TX | US | 8 | HOKA Chiang Mai Thailand by UTMB Trans-Int 160 175km 2024 (48 hours) |
| 109185 | McClelland | Connor | M | CA | US | 16 | Cuyamaca 100km 2025 (17 hours) † |
| 124128 | McClintock | Mason | M | Texas | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 111794 | McComas | Mac | M | Maryland | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 102964 | McComb | Michael | M | Vaud | CH | 4 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 108937 | McConaughy | Joseph | M | WA | US | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 125635 | McConnell | Mark | M | AB | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 125049 | McConnell | Yates | M | Colorado | US | 1 | Umstead 100M 2025 (30 hours) |
| 120536 | McCorduck | Brian | M | CALIFORNIA | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 123692 | McCorkle | Hannah | F | OH | US | 1 | Vermont 100M 2025 (30 hours) |
| 115668 | McCormick | Blair | M | WI | US | 4 | Waldo 100km 2025 (18 hours) † |
| 122178 | McCormick | Colten | M | Colorado | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 122242 | McCormick | Kristen | F | North Carolina | US | 2 | Pinhoti 100M 2025 (32 hours) |
| 114449 | McCormick | Richard | M | Vic | AU | 8 | Surf Coast Century 100km 2025 (17 hours) |
| 117280 | McCormick | Shay | M | TN | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126414 | McCoy | Alex | M | Maryland | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 115612 | McCoy | Reagan | M | PA | US | 4 | Worlds End 100km 2025 (19 hours) |
| 122077 | McCoy | Richard | M | British Columbia | CA | 2 | Kerry Way Ultra 101km 2025 (20 hours) |
| 114184 | McCracken | Amy | F | NE | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 104507 | Mccracken | John | M | IL | US | 1 | Western States 100M 2025 (30 hours) † |
| 123725 | McCue | Connor | N | Michigan | US | 1 | Rabid Raccoon 100km 2025 (22 hours) |
| 107897 | McCue | Mark | M | IN | US | 8 | Rim to River 100M 2025 (32 hours) † |
| 125947 | McCullough | Matthew | M | Ain | FR | 1 | Trail du Saint-Jacques by UTMB 130km 2025 (28 hours) |
| 125854 | McCully | Alison | F | Texas | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 117572 | McCurdy | Dalton | F | Montana | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 127664 | McDaniel | Skylar | M | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 102458 | Mcdearmon | Robin | M | CA | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 126525 | mcdermott | dillon | M | FL | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 111457 | McDole | Josh MCDole | M | WI | US | 4 | Bigfoot 206M 2025 (100 hours) † |
| 127231 | McDonald | Ben | M | MS | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 126650 | McDonald | Dustin | M | VA | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 105001 | McDonald | Mike | M | CA | US | 128 | Pine to Palm 100M 2025 (34 hours) † |
| 102500 | McDonald | Nick | M | OH | US | 16 | Rocky Raccoon 100M 2025 (30 hours) |
| 125585 | McDonald | Ryan | M | NY | US | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 122255 | McDonald | Tommy | M | Alberta | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 119773 | McDonnell | Alexander | M | NSW | AU | 2 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 123774 | McDonnell | John | M | Ohio | US | 1 | Mohican 100M 2025 (32 hours) |
| 110885 | McDonnell | Richard | M | Colorado | US | 8 | Bighorn 100M 2025 (35 hours) |
| 103985 | McDonough | Tim | M | New Brunswick | CA | 64 | Vermont 100M 2025 (30 hours) |
| 126327 | McDonough | Travis | M | Nevada | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 103567 | McDowall | Andrew | M | NZL | NZ | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 101276 | McDowell | Amy | F | NC | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 112647 | McEnaney | Patrick | M | MA | US | 1 | Western States 100M 2025 (30 hours) † |
| 111980 | McEwan | Andrew | M | Surrey | GB | 8 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 124016 | McEwen | Max | M | Pembrokeshire | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 125702 | McFadden | Dave | M | IL | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 106517 | Mcfadden | Lisa | F | NC | US | 2 | Umstead 100M 2025 (30 hours) |
| 111692 | McGee | Eric | M | Quebec | CA | 8 | Indiana 100M 2025 (30 hours) |
| 100918 | McGee | John | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127860 | McGehee | Travis | M | TN | US | 1 | Mamba 100M 2024 (34 hours) † |
| 124664 | McGill | Kelsey | F | OR | US | 1 | Bigfoot 206M 2025 (100 hours) † |
| 104261 | McGilvery | Wayne | M | CA | US | 32 | Hardrock 100M 2025 (48 hours) † |
| 112503 | McGinley | Chris | M | NSW | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 119460 | McGinnes | James | M | Victoria | AU | 2 | Buffalo Stampede 100km 2025 (23 hours) |
| 116262 | McGinnis | Dana | F | Pennsylvania | US | 4 | No Business 100M 2025 (34 hours) |
| 115941 | McGinnis | Ryan | M | Pennsylvania | US | 4 | Worlds End 100km 2025 (19 hours) |
| 126055 | McGlothlin | Benjamin | M | AL | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 104777 | McGonnell | Jeff | M | NC | US | 32 | Wasatch Front 100M 2025 (36 hours) † |
| 126288 | McGowan | Scott | M | Virginia | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 126079 | McGowan | Will | M | UT | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 125128 | McGrady | Pavlina | F | OR | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 103704 | McGrath | Dave | M | NY | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 110117 | McGrath | Patrick | M | Colorado | US | 16 | Never Summer 100km 2025 (23 hours) |
| 110116 | McGrath | Ruth | F | CA | US | 16 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 117098 | McGregor | Jamie | M | Scotland | GB | 2 | Hong Kong 100K 100km 2025 (23 hours) |
| 126287 | McGuure | Dan | M | MI | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 126665 | McHale | Ryan | M | Nsw | AU | 1 | Surf Coast Century 100km 2025 (17 hours) |
| 116834 | McHenry | Brent | M | MD | US | 2 | C & O Canal 100M 2025 (30 hours) |
| 103274 | McHugh | Pete | M | VT | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 115011 | McIndoe | Wayne | M | Victoria | AU | 2 | Buffalo Stampede 100km 2025 (23 hours) |
| 102261 | McIntosh | Lucia | F | CA | US | 1 | Western States 100M 2025 (30 hours) |
| 124923 | McIntyre | Diane | F | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 125554 | McInvaille | Morgan | M | CO | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 127411 | McIrvin | Ryan | M | WA | US | 1 | Cascade Crest 100M 2025 (34 hours) |
| 119675 | Mcivor | Andy | M | Virginia | US | 2 | Laurel Highlands 70.5M 2025 (20 hours) |
| 126767 | McKay | Caroline | F | N/A | GB | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 102960 | McKee | Ken | M | CA | US | 256 | Canyons by UTMB 104km 2025 (20 hours) |
| 101677 | McKeehan | Melissa | F | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 115357 | Mckelvey | Quentin | M | Queensland | AU | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 112796 | McKenna | Anna | F | QLD | AU | 8 | Tarawera by UTMB 102km 2025 (17 hours) |
| 112604 | Mckenna | Gareth | M | East Dunbartonshire | GB | 8 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 126268 | McKenna | Jarlath | M | Tyne and Wear | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 127769 | McKenna | Kevin | M | South Carolina | US | 1 | Bighorn 100M 2025 (35 hours) |
| 125020 | McKenney | Ashley | F | HI | US | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 108045 | Mckenzie | Debra | F | Florida | US | 8 | Bear, The 100M 2025 (36 hours) † |
| 117176 | McKenzie | Sean | M | RI | US | 4 | Grindstone by UTMB 100M 2025 (36 hours) |
| 113331 | McKenzie | Tim | M | NV | US | 8 | San Diego 100M 2025 (32 hours) † |
| 123041 | McKeon | Shane | M | New york | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124832 | McKeown | Thomas | M | Tx | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 119054 | McKesson | Cody | M | Arizona | US | 4 | Cocodona 250M 2025 (125 hours) |
| 126013 | McKillip | Ronald | M | Virginia | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 102664 | McKillop | Andrew | M | GBR | GB | 32 | Lakeland 100M 2025 (40 hours) |
| 118628 | McKillop | Ken | M | Ontario | CA | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 101379 | McKinnon | Tracy | M | SC | US | 16 | Sulphur Springs 100km 2025 (18 hours) |
| 100929 | Mcknight | Michael | M | UT | US | 32 | Cocodona 250M 2025 (125 hours) |
| 119336 | McKnight | Travis | M | TN | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 102285 | McKune | John | M | CA | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 104265 | McLaren | Bruce | M | GBR | GB | 32 | North Downs Way 100M 2025 (30 hours) |
| 112610 | McLarty | Zoey | F | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 113325 | McLauchlan | Leanne | F | NSW | AU | 8 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 123817 | McLaughlin | Lou | F | Monaghan | IE | 1 | Autumn 100M 2025 (28 hours) |
| 116978 | McLaughlin | Michael | M | MA | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 101393 | McLaughlin | Mitchell | M | CA | US | 64 | Cuyamaca 100km 2025 (17 hours) † |
| 125603 | McLean | James | M | Herefordshire | GB | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124189 | McLendon | Kevin | M | KY | US | 1 | Hellgate 100km 2024 (17 hours) |
| 124973 | McLin | Brynn | F | UT | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 124875 | McMahon | Jarryd | M | New South Wales | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 118874 | McMahon | John | M | Queensland | AU | 4 | Guzzler Ultra 100km 2025 (24 hours) |
| 109439 | McMahon | Sarah | F | CA | US | 16 | Javelina Jundred 100M 2025 (30 hours) |
| 111115 | McManaway | Neil | M | OR | US | 8 | Pine to Palm 100M 2025 (34 hours) † |
| 125118 | Mcmanus | Justin | M | Tennessee | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 109719 | McMeans | Keri | U | WY | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 111973 | McMenamin | Joseph | M | NEVADA | US | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 103476 | Mcmillan | Eric | M | TX | US | 16 | Arkansas Traveler 100M 2025 (30 hours) |
| 105756 | McMonagle | Mike | M | UT | US | 32 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 112513 | McMorrow | Karen | F | NSW | AU | 4 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 124891 | McMullan | Charlie | M | Florida | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 125151 | Mcnab | Joshua | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 107949 | McNally | Paula | F | CA | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 115257 | mcnamara | kyle | M | AE | US | 4 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 107821 | McNamee | Clay | M | Pennsylvania | US | 16 | Laurel Highlands 70.5M 2025 (20 hours) |
| 112907 | McNamee | Julie | F | Donegal | IE | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 121412 | McNaughton | Crissy | F | MN | US | 2 | Superior 100M 2025 (38 hours) † |
| 116584 | McNeil | Cody | M | VT | US | 2 | Tahoe 202M 2025 (100 hours) † |
| 126107 | McNeil | Stephen | M | TEXAS | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 124590 | Mcneill | Lillian | F | OR | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 125168 | McNelis | Michael | M | PA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 125586 | McNelis | William | M | Washington | US | 1 | Fat Dog 100km 2025 (24 hours) |
| 106933 | McNicol | Michael | M | Montana | US | 8 | Bighorn 100M 2025 (35 hours) |
| 126818 | McNulty | Relika | F | BC | CA | 1 | Zion 100M 2025 (36 hours) † |
| 127074 | McNulty | Timothy | M | Indiana | US | 1 | Indiana 100M 2025 (30 hours) |
| 124327 | McOuat | Brett | M | CO | US | 1 | Never Summer 100km 2025 (23 hours) |
| 119747 | McParland | Matty | M | Northern Ireland | GB | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 106934 | Mcpeak | Nicki | M | Co. Derry | IE | 16 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 124597 | McPhee | Dylan | M | NL | CA | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 125443 | McPhee | Gary | M | Fairlie | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 123650 | McPherson | Michael | M | MI | US | 1 | Superior 100M 2025 (38 hours) † |
| 124477 | McPhillips | Natalie | F | Oregon | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 119059 | McRae | Hannah | F | TAS | AU | 4 | Buffalo Stampede 100km 2025 (23 hours) |
| 126442 | mcstay | elsbeth | F | Outside USA | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 125245 | Mcvittie | Rachel | F | Bay Of Plenty | NZ | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 124372 | Mcwherter | Tyler | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 101168 | McWhorter | Travis | M | NM | US | 32 | High Lonesome 100M 2025 (37 hours) |
| 109730 | McWilliams | Kevin | M | ID | US | 2 | Fat Dog 100km 2025 (24 hours) |
| 104178 | McWilliams | Mason | M | TN | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 125617 | Mead | Gordon | M | London | GB | 1 | Thames Path 100M 2025 (30 hours) |
| 120946 | Meades-Woolley | Ellis | M | Hampshire | GB | 2 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 119280 | Meadors | Kristen | F | GA | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 125175 | Meadows | Ensley | F | Georgia | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 116798 | Meadows | Jeff | M | NC | US | 4 | Yeti Virginia 100M 2025 (30 hours) † |
| 102928 | Meadows | Jesse | M | VA | US | 32 | Rim to River 100M 2025 (32 hours) † |
| 106423 | Meadows | Troy | M | CA | US | 32 | Laurel Highlands 70.5M 2025 (20 hours) |
| 125814 | Meckenstock | Matt | M | Otago | NZ | 1 | Hardrock 100M 2025 (48 hours) † |
| 124509 | Medan | George | M | New Mexico | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 113186 | Medatati | Rajesh | M | WV | US | 8 | Cuyamaca 100km 2025 (17 hours) |
| 109967 | Medeiros | Michael | M | Ct | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 121471 | Medellin | Alberto | M | TX | US | 2 | Dinosaur Valley 100km 2024 (22 hours) |
| 117636 | Medina | Danny | M | NC | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 111930 | Medina | Lily | F | Illinois | US | 4 | Kettle Moraine 100M 2025 (30 hours) † |
| 104935 | Meding | Trevor | M | TX | US | 64 | Dinosaur Valley 100M 2024 (35 hours) † |
| 103426 | Medley | Brian | M | CA | US | 64 | Zion 100M 2025 (36 hours) † |
| 126031 | Meeder | Christian | M | Pennsylvania | US | 1 | No Business 100M 2025 (34 hours) |
| 103746 | Meehan | Sean | M | CT | US | 2 | Vermont 100M 2025 (30 hours) |
| 120717 | Mehok | Pete | M | TX | US | 2 | Cocodona 250M 2025 (125 hours) |
| 105369 | Meier | Wes | M | MN | US | 128 | Leona Divide 100km 2025 (17 hours) |
| 117181 | Meignan | Pierre | M | Centre val de Loire | AF | 4 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 110064 | Meiklejohn | Stuart | M | Wellington | NZ | 2 | IMTUF 100M 2025 (36 hours) † |
| 100122 | Meinke | Markus | M | DEU | DE | 16 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 107349 | Mejia | Danny | M | ME | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 126764 | Mejia | Jesse | M | California | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126774 | Mejia | Rosalba | F | California | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 106622 | Mejorada | Oscar | M | CA | US | 64 | Cascade Crest 100M 2025 (34 hours) |
| 124161 | Mejuto | Carlos | M | Aberdeenshire | GB | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 113469 | Melanson | Finn | M | UT | US | 2 | Cocodona 250M 2025 (125 hours) |
| 125666 | Melara | Jake | M | Colorado | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 114916 | Melchers | Andrew | M | OH | US | 4 | No Business 100M 2025 (34 hours) |
| 100301 | Melia | Brian | M | GBR | GB | 64 | Hardrock 100M 2025 (48 hours) |
| 124397 | Melice | Michael | M | OH | US | 1 | Rim to River 100M 2025 (32 hours) |
| 100344 | Melkonian | Stephanie | F | NM | US | 2 | Brazos Bend 100M 2024 (32 hours) |
| 116553 | Mellott | Christopher | M | Colorado | US | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 116004 | Mellott | Justin | M | Ohio | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 120109 | Melo Reyes | Diana Alexandra | F | Outside US and Canada | CO | 2 | Long Haul 100M 2025 (30 hours) |
| 104922 | Melton | Andrew | M | CA | US | 64 | Beaverhead 100km 2025 (20 hours) |
| 123464 | Mena | Jessica | F | CA | US | 1 | Leona Divide 100km 2025 (17 hours) |
| 120231 | Mendez | Osman | M | Wa | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 125898 | Mendonca | Aaron | M | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 123592 | Mendonca | Jason | M | Oxfordshire | GB | 1 | Thames Path 100M 2025 (30 hours) |
| 105111 | Mendoza | Brent | M | TX | US | 2 | Dinosaur Valley 100km 2024 (22 hours) |
| 107148 | MENDOZA | FERNANDO | M | LA LIBERTAD | SV | 8 | Georgia Death Race 74M 2025 (24 hours) † |
| 113975 | Mendoza | Mario | M | Or | US | 4 | Waldo 100km 2025 (18 hours) † |
| 109863 | Mendoza | Rolando | M | Ca | US | 16 | Angeles Crest 100M 2025 (36 hours) † |
| 122313 | Mendrala | Casey | F | Ma | US | 2 | Vermont 100M 2025 (30 hours) |
| 118857 | meng | sabrina | F | BC | CA | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127495 | Mengin | Vincent | M | France | FR | 1 | SwissPeaks 360km 2025 (156 hours) |
| 105948 | Menolascino | Justin | M | CA | US | 32 | Cuyamaca 100km 2025 (17 hours) † |
| 117860 | Mentz | Colleen | F | CO | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 126619 | Menzies | Dylan | M | Auckland | NZ | 1 | Taupo 100km 2025 (17 hours) |
| 113472 | Mercer | Amanda | F | NM | US | 2 | Bear, The 100M 2025 (36 hours) |
| 123823 | Mercu | Robert | M | Ontario | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 103833 | Meredith | Joel | M | TN | US | 16 | Crazy Mountain 100M 2025 (36 hours) † |
| 120163 | Meredith | Michael | M | ON | CA | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 124870 | Merer | Josh | M | CA | US | 1 | Leona Divide 100km 2025 (17 hours) |
| 114430 | Merica | Mandi | F | CO | US | 2 | Sedona Canyons 125M 2025 (52 hours) |
| 126028 | Mericle | Julia | F | PA | US | 1 | No Business 100M 2025 (34 hours) |
| 125569 | Merino Pérez | Julián | M | Valencia | ES | 1 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 126666 | Merrell | Dylan | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 104404 | Merrick | Jeffrey | M | CA | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 120851 | Merrigan | Justin | M | North Carolina | US | 2 | Massanutten 100M 2025 (36 hours) † |
| 125778 | Merrill | Erin | F | Massachusetts | US | 1 | Vermont 100km 2025 (17 hours) |
| 127118 | Merrill | Mindy | F | California | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 104186 | Merrin | Zach | M | OH | US | 16 | Canal Corridor 100M 2025 (30 hours) † |
| 127263 | Merritt | Adin | M | Maine | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 111931 | Merritt | Matthew | M | OR | US | 2 | Waldo 100km 2025 (18 hours) † |
| 120409 | Mertens | Erica | F | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 126313 | Merusi | Brian | M | WA | US | 1 | Cascade Crest 100M 2025 (34 hours) |
| 127519 | Mervin | Allison | F | UT | US | 1 | Bear, The 100M 2025 (36 hours) |
| 121371 | Merz | Pascal | M | NY | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 116332 | Meskell | Brian | M | Tipperary | IE | 4 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 124862 | Messerschmitt | Patrick | M | Ohio | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 118219 | Messié | Monique | F | CA | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 104508 | Messina | Andrew | M | NJ | US | 2 | Burning River 100M 2025 (30 hours) |
| 101310 | Messman | Clark | M | CA | US | 16 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123157 | Metaxas | Chris | M | Ontario | CA | 2 | Bear, The 100M 2025 (36 hours) † |
| 102980 | Metcalf | Doug | M | UT | US | 16 | IMTUF 100M 2025 (36 hours) † |
| 127891 | Metcalfe | Jonathan | M | CA | US | 1 | Leona Divide 100km 2025 (17 hours) |
| 113146 | Metrick | Rebecca | F | CA | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 108752 | Metz | Kevin | M | Ohio | US | 16 | Javelina Jundred 100M 2025 (30 hours) |
| 116848 | Metzger | Daniel | M | CO | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 125820 | Metzger | Luke | M | Colorado | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 116124 | Metzger | Travis | M | CA | US | 4 | Angeles Crest 100M 2025 (36 hours) † |
| 126962 | Meuchel | Daniel | M | MT | US | 1 | Crazy Mountain 100M 2025 (36 hours) † |
| 116146 | Meurant | Drake | M | MA | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 122112 | Meyer | Anders | M | Oregon | US | 2 | Waldo 100km 2025 (18 hours) † |
| 106455 | Meyer | Austin | M | CA | US | 64 | Cuyamaca 100km 2025 (17 hours) † |
| 119728 | Meyer | Bri | F | CA | US | 2 | Angeles Crest 100M 2025 (36 hours) † |
| 125650 | Meyer | Cody | M | FL | US | 1 | Long Haul 100M 2025 (30 hours) |
| 125890 | Meyer | Colin | M | TX | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 124508 | Meyer | Derek | M | Oregon | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 124873 | Meyer | Randall | M | IA | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 106937 | Meyer | Ryan | M | CA | US | 4 | Bigfoot 206M 2025 (100 hours) † |
| 113037 | Meyer | Stefan | M | Bayern | DE | 4 | Mozart by UTMB 119km 2025 (23 hours) |
| 101315 | Meyer | Thomas | M | WA | US | 32 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 124518 | Meyers | Courtney | F | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 117343 | Meyers | Jeremy | M | California | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 124373 | Meza | Ethan | M | California | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 116331 | Mezei | Michal | M | Slovakia | SK | 4 | Letecka Stovka 104km 2025 (21 hours) |
| 105786 | Meziere | Xavier | M | FRA | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 108983 | Miao | David | M | NY | US | 16 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 115987 | Miao | Lynn | F | NY | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 118533 | Michael | Andrew | M | OH | US | 4 | No Business 100M 2025 (34 hours) |
| 113882 | Michael | Christopher | M | NM | US | 8 | Black Canyon 100km 2025 (17 hours) |
| 103940 | Michael | Sean | M | WA | US | 16 | Waldo 100km 2025 (18 hours) † |
| 120441 | Michaelian | Vahan | M | OR | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 127407 | Michalek | Lukas | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 126598 | Michalowitz | Andy | M | Illinois | US | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 127048 | Michalski | Allison | F | ID | US | 1 | Crazy Mountain 100M 2025 (36 hours) † |
| 126850 | Michard | Jacky | M | Bretagne | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 113601 | Michaud | Jean-Francois | M | Québec | CA | 8 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 122422 | Micheals | Marty | M | Maryland | US | 2 | Burning River 100M 2025 (30 hours) |
| 119308 | MICHEL | Nicolas | M | Vosges | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 100322 | Michelau | Chris | M | NL | CA | 8 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 119745 | Michell | Ross | M | WA | US | 2 | Beaverhead 100km 2025 (20 hours) |
| 102222 | Michie | Scott | M | WA | US | 16 | Bighorn 100M 2025 (35 hours) |
| 125546 | Michiels | Justin | M | CO | US | 1 | Never Summer 100km 2025 (23 hours) |
| 113807 | Mick | Josh | M | California | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 114417 | Mickle | Karen | F | NSW | AU | 2 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 121205 | Middleton | Autumn | F | CA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 122787 | Middleton | Nathan | M | Ontario | CA | 2 | Superior 100M 2025 (38 hours) † |
| 100514 | Midkiff | Shane | M | VA | US | 4 | Grindstone by UTMB 100M 2025 (36 hours) |
| 116306 | Midkiff | Tanner | M | BC | CA | 4 | Hood Hundred 100M 2025 (34 hours) |
| 103768 | Midlock | Jason | M | IL | US | 2 | Cocodona 250M 2025 (125 hours) |
| 121260 | Mielczarek | Aleksandra | F | Mikołów | PL | 2 | Letecka Stovka 104km 2025 (21 hours) |
| 100039 | Mignacco | Gianluigi | M | ITA | IT | 8 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 112220 | Mihalaras | Patrick | M | South Australia | AU | 8 | Salomon Ultra-Trail Hungary 112km 2025 (20 hours) |
| 106940 | Mihalik | Norbert | M | Borsod-Abaúj-Zemplén | HU | 8 | Autumn 100M 2025 (28 hours) |
| 126581 | Mijatovic | John | M | AB | CA | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125548 | Mika | Tomasz | M | Warsaw | PL | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 126618 | Mikesell | Jeff | M | West Virginia | US | 1 | Mamba 100M 2024 (34 hours) † |
| 114737 | Mikhalov | Maks | M | Texas | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 111381 | Milam | Evrhet | M | NV | US | 8 | Wasatch Front 100M 2025 (36 hours) † |
| 122340 | Milas | Anthony | M | CO | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 113742 | Milburn | Ben | M | Ontario | CA | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 101731 | Miles | Alli | F | OR | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 127123 | Miles | Benjamin | M | California | US | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 113192 | Miles | James | M | British Columbia | CA | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125681 | Miles | Jeffery | M | California | US | 1 | San Diego 100M 2025 (32 hours) † |
| 116353 | Miles | Justin | M | Gloucestershire | GB | 2 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 127614 | Miles | Paul | M | Berkshire | GB | 1 | Autumn 100M 2025 (28 hours) |
| 117985 | Milet | Ludovic | M | Paca | FR | 4 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 126686 | Milisa | Luka | M | New Zealand | NZ | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 114569 | Millard | Mark | M | South Australia | AU | 4 | Tarawera by UTMB 100M 2025 (36 hours) |
| 125071 | Millard | Ryan | M | GA | US | 1 | Indiana 100M 2025 (30 hours) |
| 107636 | Millbery | Spencer | M | London | GB | 16 | North Downs Way 100M 2025 (30 hours) |
| 102300 | Miller | Alison | F | TX | US | 1 | Western States 100M 2025 (30 hours) † |
| 104627 | Miller | Brian | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 111996 | Miller | Cavin | M | CA | US | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126808 | Miller | Clara | F | Colorado | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 120686 | Miller | Collin | M | California | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 101199 | Miller | Darren | M | PA | US | 32 | Moab 238M 2025 (108 hours) † |
| 126173 | Miller | David | M | Nc | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 103751 | Miller | David | M | OR | US | 16 | Hardrock 100M 2025 (48 hours) † |
| 103397 | Miller | Drew | M | NY | US | 1 | Western States 100M 2025 (30 hours) † |
| 118633 | Miller | Edwin | M | Oregon | US | 2 | Wasatch Front 100M 2025 (36 hours) † |
| 105644 | Miller | Greg | M | CA | US | 8 | Quicksilver 100km 2025 (17 hours) † |
| 116672 | Miller | Griffin | M | Washington | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 127831 | Miller | Isaac | M | NC | US | 1 | Umstead 100M 2025 (30 hours) |
| 111882 | Miller | Jack | N | Utah | US | 4 | Zion 100M 2025 (36 hours) † |
| 112788 | Miller | Jamie | F | CT | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 106421 | Miller | Jeff | M | MN | US | 8 | Superior 100M 2025 (38 hours) |
| 120423 | Miller | Jeremy | M | TX | US | 2 | Crazy Mountain 100M 2025 (36 hours) |
| 101033 | Miller | Joe | M | CO | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 102723 | Miller | Jordan | M | CA | US | 16 | Miwok 100km 2025 (15:30:59 hours) |
| 121091 | Miller | Jordan | M | Kentucky | US | 2 | Mountain Lakes 100M 2025 (30 hours) |
| 123720 | Miller | Josh | M | MI | US | 1 | Superior 100M 2025 (38 hours) |
| 107667 | Miller | Katrina | F | Montana | US | 8 | Lost Soul Ultra 100km 2025 (21 hours) |
| 121376 | Miller | Kevin | M | Illinois | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 126660 | Miller | Levi | M | TX | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 119833 | Miller | Michael | M | New York | US | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 125019 | Miller | Mitchell | M | CA | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 125097 | Miller | Nick | M | AZ | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 108315 | Miller | Richard | M | Nevada | US | 16 | Twisted Branch 100km 2025 (20 hours) † |
| 107879 | Miller | Sarah | F | Mississippi | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 121155 | Miller | Seth | M | WA | US | 2 | Waldo 100km 2025 (18 hours) † |
| 108328 | Miller | Terry | M | CO | US | 4 | Hardrock 100M 2025 (48 hours) † |
| 103303 | Miller | Thomas | M | NC | US | 16 | Umstead 100M 2025 (30 hours) |
| 117502 | Millfahrt | Markus | M | Auckland | NZ | 2 | Taupo 100km 2025 (17 hours) |
| 116301 | milli | francesco | M | FI | IT | 4 | Tuscany Crossing 103km 2025 (21 hours) |
| 127398 | Million | Brian | M | VA | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 119459 | Millman | Rachel | F | Arizona | US | 2 | Moab 238M 2025 (108 hours) † |
| 112015 | Millones | Marc-Antoine | M | Québec | CA | 2 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 126595 | Mills | Christopher | M | Manchester | GB | 1 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 125481 | Mills | David | M | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 113855 | Mills | Heleen | F | Western Cape | ZA | 4 | Transgrancanaria 125km 2025 (28 hours) |
| 121486 | Mills | Randa | F | Oregon | US | 2 | Waldo 100km 2025 (18 hours) † |
| 125031 | Milne | Monique | F | Hawkes Bay | NZ | 1 | Taupo 100km 2025 (17 hours) |
| 110197 | Milner | Gina | F | CA | US | 16 | Pine to Palm 100M 2025 (34 hours) † |
| 118017 | Milner | William | M | CO | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 114220 | MIMURA | NORIO | M | Hyogo-ken | JP | 4 | Lake Biwa 100M 2025 (52 hours) |
| 120669 | Minakov | Aleksey | M | Moscow | RU | 2 | Golden Ring 100km 2025 (18 hours) |
| 114866 | Ming | Bryan | M | Texas | US | 2 | Dinosaur Valley 100km 2024 (22 hours) |
| 108546 | MInkema | John | M | Ca | US | 16 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 127197 | Minkov | Ross | M | Massachusetts | US | 1 | Vermont 100M 2025 (30 hours) |
| 101399 | Minkovich | Kirill | M | CA | US | 64 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 112313 | Mino Faukner | Helen | F | California | US | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 114936 | MINODIER | Laurent | M | Ile de France | FR | 4 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 124740 | Minski | Jason | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 113311 | Minson | Andrew | M | OR | US | 8 | Pine to Palm 100M 2025 (34 hours) † |
| 116847 | Mintac | Philip | M | NC | US | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 100662 | Mintz | Jason | M | NY | US | 8 | Canal Corridor 100M 2025 (30 hours) † |
| 127508 | Mintz | Jordan | F | WA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 103643 | Mintz | Trish | F | ON | CA | 64 | Sulphur Springs 100km 2025 (18 hours) |
| 105721 | Mires | Jeff | M | IN | US | 64 | Indiana 100M 2025 (30 hours) |
| 113818 | Miron | Diego | M | Florida | US | 8 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 119504 | miron | Iulian | M | Galați | RO | 2 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 115190 | Mirynech | Bre | F | British Columbia | CA | 2 | Fat Dog 100km 2025 (24 hours) |
| 127580 | Mirzabekiantz | Serge | M | Schaerbeek | BE | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127144 | Mis | John | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 120319 | Misenhimer | Logan | M | Colorado | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 126765 | Misrole | Wensley Jnr | M | North Holland | NL | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 113626 | Mister | Brian | M | NC | US | 8 | Hood Hundred 100M 2025 (34 hours) |
| 112021 | Mitchell | Erica | F | MN | US | 8 | Superior 100M 2025 (38 hours) † |
| 123661 | Mitchell | Isaiah | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127117 | Mitchell | Jake | M | Alabama | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 112930 | Mitchell | Lauren | F | Minnesota | US | 8 | Sean O'Brien 100km 2025 (17 hours) † |
| 108727 | Mitchell | Michael | M | Colorado | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 109065 | Mitchell | Robert | M | MN | US | 16 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 126276 | Mitchell | Taylor | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 104184 | Mitchum | Benji | M | AL | US | 32 | Arkansas Traveler 100M 2025 (30 hours) |
| 123701 | Mitnick | Matthew | M | California | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 123999 | MITRANI | SEBASTIEN | M | Alpes Maritimes | FR | 1 | Dalmacija Ultra Trail 122km 2025 (32 hours) |
| 127700 | Mitrovich | Patrick | M | SC | US | 1 | Mohican 100M 2025 (32 hours) |
| 125166 | Mitsch | Mike | M | Pennsylvania | US | 1 | Rabid Raccoon 100km 2025 (22 hours) |
| 127530 | Mitzkus | Jacob | M | OR | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 115908 | Miura | Hiroyuki | M | Tokyo | JP | 4 | OSJ Ontake 100km 2025 (20 hours) |
| 104718 | Miura | Sho | M | JPN | JP | 4 | OSJ Ontake 100km 2025 (20 hours) |
| 117934 | Mixon | Chris | N | Ms | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 113884 | Miya | Eric | M | California | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 122624 | miyagawa | kazuhito | M | Kanagawa | JP | 2 | Okushinano 100km 2025 (21 hours) |
| 119853 | Miyake | Tadahiro | M | fukuoka | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 126300 | Miyazawa | Makoto | M | Chiba | JP | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124831 | Mizelli | Dominik | M | Oberösterreich | AT | 1 | Restonica Trail by UTMB - Ultra-Trail® di Corsica 110km 2025 (36 hours) |
| 104638 | Mizukoshi | Masato | M | JPN | JP | 8 | FunTrails Chichibu & Okumusashi 100M 2024 (32 hours) |
| 126700 | MIZUNOYA | Yuki | M | Kumamoto | JP | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 119699 | mizutani | kanta | M | ishikawa | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 110843 | Mlynarczyk | Jakub | M | New South Wales | PL | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 104047 | Mo | Yu-Yen | M | CA | US | 4 | Pine to Palm 100M 2025 (34 hours) † |
| 127077 | MODROW | MATTHEW | M | AZ | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 118937 | Moe | Carl | M | New York | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 105329 | Moe | Eric | M | CA | US | 2 | San Diego 100M 2025 (32 hours) † |
| 127187 | Moe | Jordan | M | CA | US | 1 | Leona Divide 100km 2025 (17 hours) |
| 114049 | moe | justin | M | ca | US | 8 | Wasatch Front 100M 2025 (36 hours) † |
| 120464 | Moe | Malcolm | M | Arkansas | US | 2 | Dinosaur Valley 100km 2024 (22 hours) |
| 127576 | Moening | Tommy | M | Michigan | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 123936 | Moersch | Joel | M | Oregon | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 127628 | Moffat | Rich | M | Utah | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 115730 | Moffatt | Colleen | F | PA | US | 4 | Worlds End 100km 2025 (19 hours) |
| 120747 | Moffitt | Doug | M | NY | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 116734 | Moget | Frederic | M | Paris | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 126712 | Moget | Veronique | F | France | FR | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 116539 | Mogg | Jonathan | M | Ontario | CA | 4 | Sulphur Springs 100M 2025 (30 hours) |
| 122098 | Moglia | Michael | M | New York | US | 2 | Worlds End 100km 2025 (19 hours) |
| 117542 | Mohamed | Salim | M | Surrey | GB | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 116430 | mohammed | kaleel | M | North Carolina | US | 4 | Umstead 100M 2025 (30 hours) |
| 127957 | Mohler | Hayden | M | OH | US | 1 | Umstead 100M 2025 (30 hours) |
| 117406 | Mohn | Benjamin | M | New York | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 117551 | Mohr | Arthur | M | Bavaria | DE | 4 | Zugspitz 100M 2025 (48 hours) |
| 108907 | Mohr | Chase | M | OH | US | 16 | Superior 100M 2025 (38 hours) † |
| 113159 | Mohr | Eric | M | North Carolina | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 120705 | Mohr | Jeffrey | M | California | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 126485 | Mohr | Nathaniel | M | TN | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 119598 | Moiana | Matteo | M | Lombardia | IT | 2 | Swiss Canyon Trail 111km 2025 (24 hours) |
| 126398 | Moir | David | M | Tyne & Wear | GB | 1 | Swiss Alps 100M 2025 (50 hours) |
| 125391 | Moisan | Jean-René | M | Québec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 126990 | Mok | Matthew Martin | M | Hong Kong | HK | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 125919 | MOK | SEUNGHUN | M | Seoul | KR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 106944 | Molakides | Mike | M | California | US | 256 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 118264 | Moldofsky | Heather | F | NY | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 124553 | Moldoveanu | Petrică | M | Constanta | RO | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 101519 | Molitor | Kara | F | TN | US | 8 | Georgia Death Race 74M 2025 (24 hours) † |
| 120633 | Molke | Rob | M | Minnesota | US | 1 | Western States 100M 2025 (30 hours) † |
| 119600 | Moller | James | M | Texas | US | 2 | Dinosaur Valley 100km 2024 (22 hours) |
| 105711 | Molloy | John | M | NZL | NZ | 32 | Tahoe 202M 2025 (100 hours) † |
| 100101 | Molloy | Michael | M | AUS | AU | 32 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 116271 | Molnar | Almos | M | RI | US | 4 | Twisted Branch 100km 2025 (20 hours) † |
| 104894 | Molnar | Chrystal | F | PA | US | 64 | Laurel Highlands 70.5M 2025 (20 hours) |
| 100407 | Moloney | Daniel | M | GBR | GB | 64 | South Downs Way 100M 2025 (30 hours) |
| 124064 | Mombelet | Yvan | M | Haute savoie | FR | 1 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 112847 | Monaghan | Jason | M | Leitrim | IE | 8 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 117394 | MONAHAN | Christopher | M | ME | US | 4 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 126023 | Moncada | Andy | M | New York | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 101627 | Mondin | Derek | M | CA | US | 16 | San Diego 100M 2025 (32 hours) † |
| 101018 | Monem | Mansour | M | CA | US | 1 | Waldo 100km 2025 (18 hours) † |
| 100851 | Monesmith | Josh | M | IN | US | 32 | Canyons by UTMB 104km 2025 (20 hours) |
| 107549 | Monical | Nicki | F | CA | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 107727 | Monk | Jessica | F | WI | US | 8 | Superior 100M 2025 (38 hours) † |
| 124005 | Monnot | Antoine | M | Zurich | CH | 1 | Zugspitz 106km 2025 (25 hours) |
| 123796 | Monro | Doug | M | London | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 118826 | Montano Duran | Javier Marcelo | M | La Paz | BO | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 105560 | Montellano | Jose | M | CA | US | 8 | Angeles Crest 100M 2025 (36 hours) † |
| 122009 | Monteyremard | Cyril | M | Rhône | FR | 2 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 101015 | Montgomery | Robert | M | NV | US | 128 | Hardrock 100M 2025 (48 hours) † |
| 127745 | Montoya | Dave | M | Queensland | AU | 1 | Guzzler Ultra 100km 2025 (24 hours) |
| 120229 | Montroy | Kevin | M | MN | US | 2 | Superior 100M 2025 (38 hours) † |
| 119635 | Moody | Evan | M | NY | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 112149 | Moon | Jordan | M | Colorado | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 115644 | Moore | Alea | F | Franklin | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 120090 | Moore | Alexander | M | United Kingdom | GB | 2 | North Downs Way 100M 2025 (30 hours) |
| 107458 | Moore | Andrea | F | TX | US | 16 | Tahoe 202M 2025 (100 hours) † |
| 112500 | Moore | Andrew | M | Queensland | AU | 8 | Blackall 100km 2025 (18 hours) |
| 113057 | Moore | Andrew | M | Dublin | IE | 2 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 124229 | Moore | Andrew | M | NH | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 127911 | Moore | Annie | F | LA | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 127168 | Moore | Annie | F | TN | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 105300 | Moore | Benjamin | M | MT | US | 32 | Beaverhead 100km 2025 (20 hours) |
| 112948 | Moore | Eve | F | England | GB | 8 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 126788 | Moore | Harrison | M | South Carolina | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 125772 | Moore | Jared | M | MI | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 100049 | Moore | Jeffrey | M | MS | US | 8 | Massanutten 100M 2025 (36 hours) † |
| 101547 | Moore | Kevin | M | CA | US | 64 | Waldo 100km 2025 (18 hours) † |
| 126879 | Moore | Marie | F | UT | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 126576 | Moore | Mike | M | MD | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 102496 | Moore | Rob | M | GBR | GB | 128 | Autumn 100M 2025 (28 hours) |
| 119846 | Mora | Nicola | M | Lombardia | IT | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125669 | Morales | Carlos | M | PE-LMA | PE | 1 | Long Haul 100M 2025 (30 hours) † |
| 111197 | Morales | Devin | M | OR | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 125000 | Morales | Eduardo | M | CA | US | 1 | Waldo 100km 2025 (18 hours) |
| 122371 | Morales | Tyler | M | California | US | 2 | Zion 100M 2025 (36 hours) † |
| 111735 | Morales Ramirez | Gerard | M | Barcelona | US | 8 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 102768 | Morales Rodriguez | Juan Carlos | M | Puebla | MX | 8 | HOKA Bandera 100km 2025 (17 hours) |
| 123733 | Moran | John | M | Louisiana | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 125457 | MORAND | Nicolas | M | Zone 2 : dpt 85 | FR | 1 | La H.O.T. du Père Noël 133km 2024 (25 hours) |
| 124985 | Morari | Tia | F | Ab | CA | 1 | Tahoe 202M 2025 (100 hours) † |
| 102837 | Moreau | Evan | M | OR | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 112867 | Moreaux | julien | M | Occitanie | FR | 8 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 117761 | Morefield | Kate | F | TX | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 114175 | Morel | Adam | M | IN | US | 8 | Rim to River 100M 2025 (32 hours) † |
| 124889 | Morel | Skeets | M | BC | CA | 1 | Hood Hundred 100M 2025 (34 hours) |
| 124714 | Morell | Anthony | M | Nunavut | CA | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 118043 | Moreno | Alisha | F | WV | US | 4 | Mohican 100M 2025 (32 hours) |
| 118138 | Moreno | Erick | M | WI | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 111482 | Moretti | Marco | M | Liguria | IT | 8 | Tuscany Crossing 103km 2025 (21 hours) |
| 127945 | Moretz | Jason | M | Utah | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 127692 | Morey | Geoffrey | M | Oxfordshire | GB | 1 | Thames Path 100M 2025 (30 hours) |
| 125067 | Morford | Derrick | M | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 127798 | Morgan | Bryn | M | Hawkes Bay | NZ | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 124507 | Morgan | Douglas | M | OH | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 121628 | Morgan | Gregory | M | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 108716 | Morgan | Ian | M | Barcelona | ES | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 109672 | Morgan | Jeff | M | AL | US | 16 | Hellbender 100M 2025 (40 hours) † |
| 117298 | Morgan | Joseph | M | California | US | 4 | Never Summer 100km 2025 (23 hours) |
| 127043 | Morgan | Kevin | M | BC | CA | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 122682 | Morgan | Marc | M | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 125816 | Morgan | Monica | F | VA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 110172 | Morgan | Nathan | M | Idaho | US | 2 | Run Rabbit Run 100M 2025 (36 hours) † |
| 105475 | Morgan | Patrick | M | SC | US | 32 | Hellbender 100M 2025 (40 hours) † |
| 116736 | Morgan | Ryan | M | MT | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 117033 | Morgan | Sam | M | California | US | 2 | Dinosaur Valley 100km 2024 (22 hours) |
| 113143 | Morgan | Shane | M | Norfolk | GB | 4 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 108545 | Morgan | Timmy | M | Pennsylvania | US | 8 | Rim to River 100M 2025 (32 hours) † |
| 115734 | Morgan | Troy | M | Ontario | CA | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 127441 | MORI | KAZUAKI | M | Tokyo | JP | 1 | Okushinano 100km 2025 (21 hours) |
| 117006 | Mori | Misako | F | Tokyo | JP | 2 | OSJ Ontake 100km 2025 (20 hours) |
| 125184 | Morin | Elijah | M | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 102588 | Morin | Jean Nicolas | M | QC | CA | 64 | Vermont 100km 2025 (17 hours) |
| 121053 | Morin | Marc andré | M | QC | CA | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 116968 | Morissette | Philippe | M | QC | CA | 4 | Quebec Mega Trail 135km 2025 (32 hours) |
| 123336 | Morita | Toshiaki | M | Kanagawa | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 108415 | Moriya | Mitsuo | M | Tochigi-ken | JP | 4 | Lake Biwa 100M 2025 (52 hours) |
| 117971 | MORIYAMA | MACHIKO | F | AICHI | JP | 4 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 119427 | Morman | Scott | M | OH | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 124583 | Morren | Jérémy | M | Profondeville | BE | 1 | TOR130 - Tot Dret 130km 2025 (44 hours) |
| 100065 | Morris | Andy | M | GBR | GB | 8 | SwissPeaks 360km 2025 (156 hours) |
| 122156 | Morris | Carl | M | West Yorkshire | GB | 2 | Lakeland 100M 2025 (40 hours) |
| 116733 | Morris | Charles | M | NH | US | 4 | Vermont 100M 2025 (30 hours) |
| 107229 | Morris | Dana | M | CA | US | 16 | Leona Divide 100km 2025 (17 hours) |
| 125360 | Morris | Dylan | M | London | GB | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 102457 | Morris | Gareth | M | NZL | NZ | 64 | Tarawera by UTMB 100M 2025 (36 hours) |
| 125906 | Morris | Gavin | M | Gauteng | ZA | 1 | Karkloof 100M 2025 (36 hours) |
| 111480 | MOrris | Jenny | F | New South Wales | AU | 4 | North Downs Way 100M 2025 (30 hours) |
| 120958 | Morris | Jessica | F | South Glamorgan | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 126205 | Morris | M | F | Washington | US | 1 | Waldo 100km 2025 (18 hours) † |
| 126872 | Morris | Peter | M | NJ | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 123461 | Morris | Ryan | M | TN | US | 1 | Hellbender 100M 2025 (40 hours) † |
| 127963 | Morris | Samuel | M | Ceredidgion | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 121147 | Morrison | Allana | F | MT | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 121906 | Morrison | Martin | M | Aberdeenshire | GB | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 106065 | Morrison | Richard | M | CA | US | 32 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 126486 | Morrison | Samuel | M | Washington | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 109776 | Morrow | Jacqui | F | NSW | AU | 8 | Blackall 100km 2025 (18 hours) |
| 115344 | Morse | Faye | F | Gibraltar | GI | 2 | Autumn 100M 2025 (28 hours) |
| 125262 | Mort | Ander | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 101862 | Mortensen | Soren Hadsund | M | DNK | DK | 2 | Fat Dog 120M 2025 (48 hours) † |
| 107332 | Mortensen | Zach | M | NC | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 125978 | MORTON | Emma | F | Haute Garonne | FR | 1 | Ultra Trail Vipava Valley 165km 2025 (46 hours) |
| 123742 | Morton | Lora | F | KY | US | 1 | Indiana 100M 2025 (30 hours) |
| 102912 | Morton-Langehaug | Jessi | F | UT | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 120496 | Moseley | Cade | M | OR | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 124487 | Moser | Adriana | F | Tyrol | AT | 1 | Istria by UTMB 168km 2025 (46 hours) |
| 121438 | Moser | Josh | M | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 114981 | Moses | Angela | F | MO | US | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 124052 | Moses | Logan | M | NC | US | 1 | Cocodona 250M 2025 (125 hours) |
| 119727 | Mosey | Steve | M | N Lincs | GB | 2 | Hardwolds 80M 2024 (24 hours) |
| 102192 | Mosher | William | M | CA | US | 128 | Cuyamaca 100km 2025 (17 hours) † |
| 126435 | Moshtael | Navid | M | CA | US | 1 | San Diego 100M 2025 (32 hours) † |
| 125979 | Mosier | John | M | NY | US | 1 | Eastern States 100M 2025 (36 hours) |
| 116887 | Moskalski | Timothy | M | DC | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124984 | Moskovitz | Jeremy | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 103019 | Mosley | Christine | F | WA | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 104287 | Mosley | Sharon | F | OR | US | 32 | Javelina Jundred 100M 2025 (30 hours) † |
| 121509 | Moss | Jacob | M | Indiana | US | 2 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 100046 | Moss | Kyle | M | CO | US | 64 | Sulphur Springs 100km 2025 (18 hours) |
| 127876 | Moss | Patrick | M | Auckkand | NZ | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 127466 | Mossman | Ben | M | MN | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 103208 | Mossman | Dawson | M | NB | CA | 8 | Vermont 100km 2025 (17 hours) |
| 114287 | Mossman | Jessica | F | WA | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 124900 | Mostafa | Omar | M | NJ | US | 1 | Vermont 100km 2025 (17 hours) |
| 126025 | Mostoufi | Siamak | M | IL | US | 1 | North Downs Way 100M 2025 (30 hours) |
| 123747 | Mott | Steven | M | Michigan | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 119763 | Motte | Cyrille | M | France | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 119515 | Motte | Guillaume | M | Occitanie | FR | 1 | Grand Raid Ventoux by UTMB 124km 2025 (30 hours) |
| 114357 | Mottola | Chris | M | Montana | US | 2 | Beaverhead 100km 2025 (20 hours) |
| 125914 | Mottram | Tom | M | Hampshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 106952 | Motyka | Kelly | F | CA | US | 2 | Leona Divide 100km 2025 (17 hours) |
| 110312 | MOU | Vincent | M | val de marne | FR | 4 | Mount Yun by UTMB - UMY 159.6km 2025 (48 hours) |
| 126089 | Mouch | GINA | F | MI | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 127184 | Moulin | Philippe | M | Pays de la loire | FR | 1 | Trail du Saint-Jacques by UTMB 130km 2025 (28 hours) |
| 125203 | Mounce | Hunter | M | Tennessee | US | 1 | No Business 100M 2025 (34 hours) |
| 118232 | Mourichon | Charles | M | Bretagne | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127611 | Mousley | Skyler | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127382 | Moutray | Pierrick | M | France1 | FR | 1 | Grand Raid Ventoux by UTMB 124km 2025 (30 hours) |
| 101700 | Mower | Clark | M | UT | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 120573 | Moy | Matthew | M | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 125723 | Moyao | Irma | F | CA | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 124615 | Moyer | Erin | F | NV | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 115834 | Moyer | Kara | F | PA | US | 4 | Eastern States 100M 2025 (36 hours) |
| 121644 | Moysan | Gwendal | M | Ariège | FR | 2 | Grand Raid des Pyrénées - Ultra 160km 2025 (48 hours) |
| 126916 | Mølholm | Nicky | M | N/A | DK | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 119361 | Møller | Christian Balthazar | M | - | DK | 2 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 125095 | Mrakovcic | Steve | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 107778 | Mrowiec | Jakub | M | Lesser Poland | PL | 1 | Western States 100M 2025 (30 hours) † |
| 100679 | Mrowka | Joanna | F | NY | US | 32 | Vermont 100km 2025 (17 hours) |
| 100663 | Mrowka | Marcin | M | NY | US | 16 | Vermont 100km 2025 (17 hours) |
| 103658 | Mu | Jie | F | CHN | CN | 8 | Hong Kong 100K 100km 2025 (23 hours) |
| 123096 | Muawad | Will | M | WA | US | 2 | No Business 100M 2025 (34 hours) |
| 126369 | Muchna | Matthew | M | OR | US | 1 | Hellgate 100km 2024 (17 hours) |
| 123590 | Mudge | David | M | Queensland | AU | 1 | Guzzler Ultra 100km 2025 (24 hours) |
| 124544 | Mudry | Nicolas | M | Geneve | CH | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 103952 | Mueller | Markus | M | AUT | AT | 2 | Nuts Ylläs Pallas 100km 2025 (22 hours) |
| 127174 | Mueller | Michael | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 115270 | Mueller | Tim | M | North Holland | NL | 2 | Mallorca by UTMB: Serra de Tramuntana (SDT) 135km 2025 (30 hours) |
| 122355 | Muenzing | Michael | M | Baden Württemberg | DE | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 115363 | Mugnier | Loïc | M | Haute-Savoie | FR | 4 | Swiss Canyon Trail 111km 2025 (24 hours) |
| 114313 | Muhlner | Gregory | M | DC | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 122966 | Muhs | Emily | F | WI | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 108719 | Muir | Alex | M | Surrey | GB | 16 | South Downs Way 100M 2025 (30 hours) |
| 119507 | Mukherjee | Shamba | M | West Bengal | IN | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 126438 | mukoyama | Ko | M | yamanashi | JP | 1 | FunTrails Chichibu & Okumusashi 105km 2024 (30 hours) |
| 116259 | Muladore | Kyle | M | California | US | 4 | Sean O'Brien 100km 2025 (17 hours) † |
| 115068 | Mulcahy | Kate | F | Montana | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 107712 | Mulder | Rickert | M | Western Cape | ZA | 2 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 122671 | Muldoon | Tim | M | Wisconsin | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 127035 | MULHALL | MIKAELA | F | WA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 102044 | Mulholand | Brian | M | CA | US | 2 | Bighorn 100M 2025 (35 hours) |
| 111168 | Mullen | Daniel | M | TX | US | 2 | HOKA Bandera 100km 2025 (17 hours) |
| 103943 | Mullenax | Raymond | M | ID | US | 32 | Dinosaur Valley 100km 2024 (22 hours) |
| 119363 | Müller | Flo | M | Zurich | US | 2 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 101031 | Muller | Grant | M | GA | US | 64 | Pinhoti 100M 2025 (32 hours) |
| 123167 | Muller | Michael | M | WA | US | 2 | Cascade Crest 100M 2025 (34 hours) |
| 125654 | Müller | Peter | M | Salzburg | AT | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 122146 | Müller-Thorwart | Ole | M | Bavaria | DE | 2 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 115712 | Mulligan | Karl | M | Baden-Württemberg | DE | 4 | Azores Trail Run (Whalers' Great Route) 118km 2025 (26 hours) |
| 109909 | Mulligan | Lea | F | TN | US | 16 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 102516 | Mullin | Christopher | M | CA | US | 16 | Quicksilver 100km 2025 (17 hours) † |
| 124317 | mullins | kevin | M | co | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 100848 | Mullins | Padraig | M | Cork | IE | 8 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 126110 | Mumford | Kathleena | F | Virginia | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 125341 | Mun | Benjamin | M | Occitanie | FR | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 100351 | Munari | Dana | M | TX | US | 64 | Arkansas Traveler 100M 2025 (30 hours) |
| 110018 | Munaut | Jeremy | M | Wallonie | BE | 2 | SwissPeaks 360km 2025 (156 hours) |
| 127171 | Munday | Peter | M | NJ | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 116747 | MUNHOZ JOLO | CEZAR | M | SP | BR | 4 | Valhöll Fin del Mundo by UTMB 131km 2025 (30 hours) |
| 112649 | Muniz | Andrew | M | Arizona | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124982 | Munoz | Alejandro | M | SJ | CR | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 120906 | Munro | Matthew | M | Ontario | CA | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 119053 | Munter | Andrew | M | NV | US | 4 | Sean O'Brien 100km 2025 (17 hours) † |
| 110079 | Muradyan | Benjamin | M | CO | US | 16 | Rio Del Lago 100M 2025 (30 hours) |
| 117501 | MURAKAMI | KOSUKE | M | Ho Chi Minh | VN | 2 | Vietnam Mountain Marathon 100M 2024 (44 hours) |
| 122601 | MURAKOSHI | HIROYUKI | M | IN | US | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 101707 | Muraleedharan | Jaikrishnan | M | CA | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 119567 | Muralidhara | Sachin | M | California | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 104544 | Murata | Ryo | M | JPN | JP | 16 | Mozart by UTMB 119km 2025 (23 hours) |
| 113963 | Murata | Shuichi | M | Chiba | JP | 2 | FunTrails Chichibu & Okumusashi 105km 2024 (30 hours) |
| 120077 | Muratsubaki | Ryuta | M | kita | JP | 2 | FunTrails Chichibu & Okumusashi 100M 2024 (32 hours) |
| 125376 | Murgue | Florian | M | Isère | FR | 1 | Trail du Saint-Jacques by UTMB 130km 2025 (28 hours) |
| 120920 | Murillo | Juan | M | Texas | US | 2 | Dinosaur Valley 100km 2024 (22 hours) |
| 104130 | Murillo | Rebecca | F | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 104492 | Murphey | Mckinley | M | CA | US | 32 | San Diego 100M 2025 (32 hours) † |
| 103620 | Murphy | Alex | M | QLD | AU | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125867 | Murphy | Benjamin | M | Georgia | US | 1 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 124772 | Murphy | Clay | M | AR | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 113339 | Murphy | Craig | M | Ain | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 100611 | Murphy | Danny | M | CA | US | 16 | Swiss Alps 100km 2025 (22 hours) |
| 103328 | Murphy | Jeason | M | CO | US | 32 | High Lonesome 100M 2025 (37 hours) |
| 122768 | Murphy | Josh | M | OH | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 126951 | Murphy | Karen | F | FL | US | 1 | Umstead 100M 2025 (30 hours) |
| 126975 | Murphy | Kyle | M | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 124405 | Murphy | Lorcan | M | MT | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 101149 | Murphy | Matt | M | FL | US | 2 | Long Haul 100M 2025 (30 hours) |
| 125722 | Murphy | Morgan | F | CO | US | 1 | Never Summer 100km 2025 (23 hours) |
| 125932 | Murphy | Nick | M | Western Cape | ZA | 1 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 127683 | Murphy | Noah | M | Colorado | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 118016 | Murphy | Randy | M | AL | US | 4 | Georgia Death Race 74M 2025 (24 hours) † |
| 125571 | Murphy | Robert | M | MA | US | 1 | Vermont 100km 2025 (17 hours) |
| 126235 | Murphy | Steven | M | Scotland | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 102213 | Murray | Chris | M | OR | US | 32 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 108100 | Murray | Eric | M | MD | US | 16 | Tunnel Hill 100M 2024 (30 hours) † |
| 121127 | Murray | Jared | M | AL | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 121569 | Murray | Jordan | M | QLD | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 122861 | Murray | Joseph | M | Pennsylvania | US | 2 | Worlds End 100km 2025 (19 hours) |
| 105675 | Murray | Joshua | M | GBR | GB | 4 | Mozart by UTMB 119km 2025 (23 hours) |
| 112673 | Murray | Kevin | M | Utah | US | 4 | Indiana 100M 2025 (30 hours) |
| 126969 | Murray | Oliver | M | Victoria | AU | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 126563 | Murray | Shawyn | M | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 126490 | Murray | timothy | M | PA | US | 1 | Worlds End 100km 2025 (19 hours) |
| 126427 | Murrett | Mac | M | CA | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 104346 | Murry | Bryce | M | NV | US | 1 | Western States 100M 2025 (30 hours) † |
| 114486 | Murtha | Steve | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 109774 | Muscat | Daniel | M | SA | AU | 4 | Blackall 100km 2025 (18 hours) |
| 123584 | Musgrave | Francis | M | Nova Scotia | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 100323 | Music | John | M | NV | US | 64 | Cocodona 250M 2025 (125 hours) |
| 125572 | Musick | Nate | M | KS | US | 1 | Javelina Jundred 100M 2025 (30 hours) |
| 125576 | Mussa | Claudia | F | Torino | IT | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 121898 | Musset | Mathieu | M | LOIRE ATLANTIQUE | FR | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 120715 | Mustonen | Petri | M | Itä-Uusimaa | FI | 2 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 117466 | Muthig | Codie | F | Utah | US | 4 | Bear, The 100M 2025 (36 hours) † |
| 118052 | mutteloke | dustin | M | Oklahoma | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 125266 | Mutterer | Frank | M | NY | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 126600 | Mutz | Madelyn | F | WI | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 103623 | Muzelle | Charles | M | FRA | FR | 128 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 121140 | Muzik | Nicholas | M | Nevada | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 115913 | Myers | Andy | M | Michigan | US | 4 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 100120 | Myers | Brian | M | NC | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 101505 | Myers | Robert | M | CA | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 109674 | Myers | Scott | M | PA | US | 16 | Hellbender 100M 2025 (40 hours) † |
| 123708 | MYINT | KYAW SWAR | M | Yangon | MM | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 118325 | Myklebust | Espen | M | Oslo | NO | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 123488 | Myles | Symon | M | Ontario | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 112158 | Myntti | Chelsea | F | Colorado | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 107587 | Myre | Sara | F | Oregon | US | 16 | Crazy Mountain 100M 2025 (36 hours) † |
| 124845 | Myrene | Scott | M | CA | US | 1 | Leona Divide 100M 2025 (33 hours) † |
| 109479 | Myrvang | Annie | F | Idaho | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 127686 | Nachtwey | Rob | M | California | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127825 | Naciri Ghoumari | Mehdi | M | Casablanca | MA | 1 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 125081 | Nadeau | Genevieve | F | Tennessee | US | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 122961 | Nadler | Kurt | M | Fribourg | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 103819 | Nadon | Norman | M | ON | CA | 8 | Lost Soul Ultra 100km 2025 (21 hours) |
| 111784 | Nagel | Matthias | M | NRW | DE | 4 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 127419 | Nagi | Shintaro | M | Yamanashi | JP | 1 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 111348 | Naidu | Daryll | M | ON | CA | 4 | Black Canyon 100km 2025 (17 hours) † |
| 124369 | Naik | Timir | M | NJ | US | 1 | Worlds End 100km 2025 (19 hours) |
| 108857 | Naimushin | Aleksei | M | Texas | US | 8 | Rocky Raccoon 100M 2025 (30 hours) |
| 126101 | Najera | Luciano | M | TX | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 119756 | Nakagawa | Ken | M | Kanagawa | JP | 2 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 121215 | nakajima | tatsuya | M | ibaraki | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 127884 | NAKAMURA | KENSUKE | M | OSAKA | JP | 1 | Lake Biwa 100M 2025 (52 hours) |
| 108095 | NAKAMURA | TADAKATSU | M | TOKYO | JP | 16 | Shinetsu Five Mountains Trail 110km 2025 (22 hours) |
| 111906 | NAKAMURA | TETSUYA | M | KAWASAKE | US | 4 | Okushinano 100km 2025 (21 hours) |
| 119079 | Nakayama | Takao | M | Nagano | JP | 4 | SkyView Ultra Trail 140km 2025 (34 hours) |
| 122806 | Nalbach | Celia | F | VA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 100992 | Nanaszko | Michael | M | OR | US | 64 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 127151 | Nancarrow | Aidan | M | MN | US | 1 | Superior 100M 2025 (38 hours) † |
| 126870 | Nande | Paola | F | Montevideo | UY | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 115265 | Naotori | Yuki | M | Fukuoka | JP | 2 | South Downs Way 100M 2025 (30 hours) |
| 116034 | Narbett | Oliver | M | England | GB | 4 | Mozart by UTMB 119km 2025 (23 hours) |
| 124555 | Narbey | Margaux | F | QC | CA | 1 | Swiss Alps 100km 2025 (22 hours) |
| 118526 | Narkowicz | Aleksandra | F | Norway | PL | 4 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 118830 | NARUSE | SUMI | F | Tokyo | JP | 4 | Okushinano 100km 2025 (21 hours) |
| 101163 | Naruse | Tomokazu | M | JPN | JP | 16 | Aso Volcano Trail 115km 2025 (28 hours) |
| 101572 | Nasta | Eduardo | M | MEX | MX | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 126480 | Nastasi | Nino | M | New York | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 104634 | Nataraju | Sunaad | M | CA | US | 8 | San Diego 100M 2025 (32 hours) † |
| 127127 | Nation | Paul | M | Victoria | US | 1 | Guzzler Ultra 100km 2025 (24 hours) |
| 109697 | Nau | Sebastian | M | Styria | AT | 8 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 119829 | Naughton | Max | M | West Midlands | GB | 1 | Western States 100M 2025 (30 hours) † |
| 123740 | Navarro | Luis | M | San José | CR | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 107822 | Nave | Rich | M | MI | US | 8 | Canal Corridor 100M 2025 (30 hours) † |
| 125529 | Naylor | Micah | M | NC | US | 1 | Bigfoot 206M 2025 (100 hours) † |
| 127757 | Nazario | Diego | M | WA | AU | 1 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 127471 | Neal | Seth | M | Maryland | US | 1 | Mamba 100M 2024 (34 hours) |
| 125886 | Nearing | Brenan | M | Nova Scotia | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 125755 | Nebel | MB | F | MD | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 124105 | Nechodom | Connor | M | Georgia | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 100930 | Nedland | Magnar | M | NOR | NO | 16 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 102686 | Nee | Darin | M | CA | US | 16 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 126494 | Neeley | Brian | M | Arizona | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 125141 | Neely | Brian | M | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 118086 | Neff | Calum | M | TX | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 105539 | Negron-Flores | Adela | F | AL | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 107996 | Neill | Eric | M | CA | US | 16 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 102717 | Neiman | Christopher | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 122260 | Neishi | Naoko | F | California | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 127050 | Neishi | Wesley | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 117236 | Neitzling | Daniel | N | ID | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 126931 | Nelles | Daniel | M | Queensland | AU | 1 | Blackall 100km 2025 (18 hours) |
| 124861 | Nelligan | Ryan | M | VA | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 120992 | Nelson | Amanda | F | Ontario | CA | 2 | Quebec Mega Trail 135km 2025 (32 hours) |
| 111398 | Nelson | Andrew | M | ky | US | 8 | No Business 100M 2025 (34 hours) |
| 120416 | Nelson | Anthony | M | UT | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 124888 | Nelson | Christopher | M | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 115797 | Nelson | Devin | M | Kansas | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 116606 | Nelson | Elliot | M | MN | US | 4 | Superior 100M 2025 (38 hours) † |
| 106158 | Nelson | Eric | M | MN | US | 32 | Superior 100M 2025 (38 hours) |
| 112541 | Nelson | Eric | M | MA | US | 8 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 116530 | Nelson | Garrett | M | Wisconsin | US | 4 | Kettle Moraine 100M 2025 (30 hours) † |
| 113246 | Nelson | James | M | MN | US | 8 | Superior 100M 2025 (38 hours) † |
| 115006 | Nelson | Josh | M | Michigan | US | 4 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 126286 | Nelson | Josh | M | VIRGINIA | US | 1 | Cocodona 250M 2025 (125 hours) |
| 127458 | Nelson | Katie | F | SD | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 114467 | Nelson | Luke | M | ID | US | 4 | Bear, The 100M 2025 (36 hours) |
| 125045 | Nelson | Luke | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 116699 | Nelson | Marc | M | ID | US | 2 | Crazy Mountain 100M 2025 (36 hours) |
| 116416 | Nelson | Melissa | F | MN | US | 4 | Superior 100M 2025 (38 hours) † |
| 104686 | Nesbit | Andrew | M | GBR | GB | 2 | Tuscany Crossing 160km 2025 (35 hours) |
| 117302 | Nesheim | Heather | F | OR | US | 4 | Bear, The 100M 2025 (36 hours) † |
| 109657 | Neuenschwander | Jace | M | TX | US | 1 | Western States 100M 2025 (30 hours) † |
| 125010 | Neufeld | Marcin | M | pomorskie | PL | 1 | Łemkowyna Ultra-Trail 150km 2025 (35 hours) |
| 117899 | Neujahr | Jonathan | M | WI | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 123277 | Neumaier | Florian | M | Bayern | DE | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 127610 | Neuman | Grayson | F | CT | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 127433 | Neuman | Justin | M | CT | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 126530 | Neumann | Andrew | M | MI | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124293 | Neumann | Blake | M | Georgia | US | 1 | No Business 100M 2025 (34 hours) |
| 126065 | Nevala-Plagemann | Jonny | M | UT | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 123907 | Nevins | Steph | F | Canterbury | NZ | 1 | Taupo 100km 2025 (17 hours) |
| 124797 | Nevious | Garrett | M | GA | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 126299 | Newberry | Mason | M | TX | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 116243 | Newblom | Austin | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 126904 | Newby | Cale | M | Minnesota | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 120035 | Newcomb | Stephanie | F | PA | US | 2 | Eastern States 100M 2025 (36 hours) |
| 122586 | Newman | Helen | F | Portsmouth | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 125568 | Newman | Kent | M | CA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 125035 | Newman | Ross | M | OR | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 105749 | Newport-Berra | Mchale | F | CA | US | 64 | Quicksilver 100km 2025 (17 hours) † |
| 116623 | Newton | Doug | M | CO | US | 2 | Hardrock 100M 2025 (48 hours) † |
| 104046 | Newton | Matt | M | WA | US | 4 | Cascade Crest 100M 2025 (34 hours) |
| 119218 | Newton | Matthew | M | NY | US | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 116901 | Neyrinck | Alexandre | M | Discovery Bay | HK | 2 | Hong Kong 100K 100km 2025 (23 hours) |
| 123985 | Neyroud | Gerard | M | Vaud | CH | 1 | SwissPeaks 170km 2025 (58 hours) |
| 125504 | Ng | Annie | F | UT | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 111166 | Ng | Ivan | M | SC | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 111738 | Ng | Lem Chee | M | Singapore | SG | 8 | Mt Fuji 100M 2025 (46 hours) |
| 127482 | Ng | Tung | M | NV | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 120927 | Ngo | Paula | F | New Mexico | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 104445 | Ngui | Mau Shun Joseph | M | HKG | HK | 64 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 127376 | Nguyen | An | M | Hanoi | US | 1 | Vietnam Mountain Marathon 100M 2024 (44 hours) |
| 123793 | Nguyen | Dao | M | Ho Chi Minh City | VN | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 126308 | Nguyen | Hai | M | Budapest | HU | 1 | Salomon Ultra-Trail Hungary 112km 2025 (20 hours) |
| 124777 | Nguyen | Hoang Lien San | F | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 117048 | Nguyen | Hoang Nam | M | CA | US | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 125960 | Nguyen | Huan | M | Ho Chi Minh City | VN | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 127425 | Nguyen | Hung | M | Hanoi | VN | 1 | Vietnam Mountain Marathon 100M 2024 (44 hours) |
| 109790 | Nguyen | Nancy | F | TX | US | 8 | Rocky Raccoon 100M 2025 (30 hours) |
| 101819 | Nguyen | Nhan | M | SC | US | 16 | Hellbender 100M 2025 (40 hours) † |
| 126923 | Nguyen | Quy | M | California | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 106177 | Nguyen | Rick | M | TX | US | 1 | Western States 100M 2025 (30 hours) † |
| 120656 | Nguyen | Tan | M | California | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 127374 | Nguyễn | Tình | M | Tốt | VN | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 125604 | Nguyen | Tony | M | WA | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 127095 | Nguyen | Valentin | M | Haute Savoie | US | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 109062 | Nguyen | William | M | CA | US | 8 | Pine to Palm 100M 2025 (34 hours) † |
| 127873 | NHAN | DANG THI HONG | F | PHU THO | VN | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 104284 | Ni Mhaoileoin | Aoife | F | Ireland | IE | 16 | Kerry Way Ultra 101km 2025 (20 hours) |
| 124482 | Nicastro | Mike | M | Colorado | US | 1 | Never Summer 100km 2025 (23 hours) |
| 127137 | Nichols | Duncan | M | NSW | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 100149 | Nichols | Gary | M | Kentucky | US | 256 | Canal Corridor 100M 2025 (30 hours) † |
| 126348 | Nichols | Hunter | M | OR | US | 1 | Mountain Lakes 100M 2025 (30 hours) † |
| 119645 | Nichols | Luke | M | NSW | AU | 2 | Blackall 100km 2025 (18 hours) |
| 116849 | Nicholson | Lonnie | M | AR | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 118765 | Nicholson | Matthew | M | Oregon | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 110576 | Nicholson | Tom | M | Surrey | GB | 8 | Valhöll Fin del Mundo by UTMB 131km 2025 (30 hours) |
| 127537 | Nickelsen | Oliver | M | Colorado | US | 1 | Waldo 100km 2025 (18 hours) † |
| 101750 | Nickelsen | Samuel | M | CA | US | 8 | Waldo 100km 2025 (18 hours) † |
| 127966 | Nickley | Scott | M | Colorado | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 120728 | Nickoloff-Bybel | Emily | F | Pennsylvania | US | 2 | Worlds End 100km 2025 (19 hours) |
| 120933 | Niclasen | Ryan | M | Ontario | CA | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 127465 | Nicol | Andy | M | Florida | US | 1 | San Diego 100M 2025 (32 hours) † |
| 121391 | Nicol | Eric | M | CO | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 118550 | nicol | jonathan | M | province nord | NC | 4 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 102436 | Nicolai | Jason | M | BC | CA | 16 | Fat Dog 100km 2025 (24 hours) |
| 106958 | Nicolas | Danne | M | Quebec | CA | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 108822 | Nicolaysen | Eric | M | IA | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 126011 | Nicoll | Simon | M | Wiltshire | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 111186 | Niederjohn | Daniel | M | Georgia - GA | US | 8 | Grindstone by UTMB 100km 2025 (18 hours) |
| 122929 | Niederjohn | James | M | CA | US | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 100372 | Niedzielski | Robert | M | POL | PL | 2 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 127321 | Nielsen | Samuel | M | TX | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 102021 | Nielsen | Theresa | F | AB | CA | 16 | Fat Dog 120M 2025 (48 hours) † |
| 119678 | Niemeir | Jesse | M | WY | US | 2 | Crazy Mountain 100M 2025 (36 hours) † |
| 123912 | Niemiec | Frank | M | PA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 124565 | Nieminen | Levi | M | CO | US | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 124922 | Niesley | Josiah | M | MT | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 123482 | Nieto | Mark | M | California | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 112152 | Nieto | Ryan | M | OR | US | 8 | Hood Hundred 100M 2025 (34 hours) |
| 101496 | Nieuwenhuis | Daan | M | NLD | NL | 16 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 118143 | Nieves Santander | Juan Manuel | M | Ciudad de México | MX | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 125752 | Nihill | Jesse | M | Queensland | AU | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 120976 | Niino | Takumu | M | NC | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 125729 | Nikkels | Mirko | M | Liege | BE | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 124624 | Nikoley | Alyssa | F | VA | US | 1 | Mamba 100M 2024 (34 hours) † |
| 120350 | Nilsen | Liisa | F | Ontario | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 123980 | Nimara | Alexandru | M | București | RO | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 124753 | Nimmo | Kayla | F | California | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 124406 | ning | ying | F | WA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126868 | Ninomiya | Tomohiro | M | Shizuoka | JP | 1 | OSJ Ontake 100km 2025 (20 hours) |
| 125286 | Nipper | Chelsea | F | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 104653 | Nishi | Tetsuya | M | JPN | JP | 2 | Aso Volcano Trail 115km 2025 (28 hours) |
| 103490 | Nishida | Moriko | F | JPN | JP | 8 | OSJ Ontake 100km 2025 (20 hours) |
| 116951 | NISHIMURA | Hirokazu | M | Shiga | JP | 4 | Penyagolosa 106km 2025 (26 hours) |
| 119412 | NISHIYAMA | MASAAKI | M | HYOGO | JP | 2 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 104147 | Nitzberg | Bill | M | CA | US | 16 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 125992 | Nivaldo da Cunha | André | M | SC | BR | 1 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 102561 | Niwa | Nozomu | M | JPN | JP | 32 | Lake Biwa 100M 2025 (52 hours) |
| 127052 | Nixon | Caleb | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 116100 | Noah | Aaron | M | OR | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 126252 | Noble | Dakota | M | OH | US | 1 | Burning River 100M 2025 (30 hours) |
| 127554 | Noble | Ross | M | Tayside | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 126315 | Noble | Sidney | M | Oregon | US | 1 | Mountain Lakes 100M 2025 (30 hours) † |
| 126921 | Noble | Simon | M | Haverfordwest | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 106170 | Noda | Marie | F | JPN | JP | 8 | HURT 100M 2025 (36 hours) † |
| 105371 | Noda | Takeshi | M | JPN | JP | 2 | HURT 100M 2025 (36 hours) † |
| 115784 | Noel | David | M | Texas | US | 4 | Bear, The 100M 2025 (36 hours) † |
| 117283 | Noel | Romain | M | Ontario | CA | 4 | Black Canyon 100km 2025 (17 hours) † |
| 122215 | Nogay | Robert | M | PA | US | 2 | Twisted Branch 100km 2025 (20 hours) |
| 118110 | Noguchi | Makoto | M | Tokyo | JP | 2 | Malaysia Ultra Trail by UTMB 100km 2024 (26 hours) |
| 115284 | Noguchi | Takuya | M | Tokyo | JP | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 123367 | Nogueira | Renato | M | CE | BR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 126933 | Noia | Caio | M | Sao Paulo | BR | 1 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 116858 | Nolan | Breena | F | CA | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127938 | Nolan | David | M | Mayo | IE | 1 | South Downs Way 100M 2025 (30 hours) |
| 114553 | Nolan | Luke | M | Dubai | AE | 8 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 124292 | Nolan | William | M | MI | US | 1 | Vermont 100km 2025 (17 hours) |
| 118081 | Nones | Madalyn | F | Oregon | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) |
| 125364 | Noonan | Doug | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 125584 | Noonan | Thomas | M | NY | US | 1 | Eastern States 100M 2025 (36 hours) |
| 120180 | Nooney | Tim | M | NC | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 114153 | Nordfjell | Maria | F | Troms | NO | 4 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 117036 | Nordgren | Marcus | M | Brussels | BE | 4 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 109788 | Nordlöf | Tomas | M | Västerbotten | SE | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125836 | Noreau | Maxime | M | Quebec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 104960 | Noren | Anders | M | SWE | SE | 64 | Täby Extreme Challenge 100M 2025 (30 hours) |
| 117888 | Norén | Andreas | M | Jämtland | SE | 2 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 127421 | Noren | Christopher | M | California | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 122471 | Norling | Eric | M | AZ | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 124077 | Norman | Bill | M | NC | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 111456 | Norris | Cory | M | Ca | US | 2 | Mountain Lakes 100M 2025 (30 hours) † |
| 124391 | Norris | Mike | M | Tennesee | US | 1 | No Business 100M 2025 (34 hours) |
| 103347 | Norton | Howard | M | AUS | AU | 1 | Western States 100M 2025 (30 hours) † |
| 115345 | Norton | Kelly | F | WI | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 102911 | Norton | Ryan | M | WI | US | 32 | Canyons by UTMB 104km 2025 (20 hours) |
| 109882 | Norton | Ryan | M | Oregon | US | 4 | IMTUF 100M 2025 (36 hours) † |
| 119245 | Norwood | Darrin | M | California | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 103054 | Norwood | Zach | M | NE | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 118271 | Nosek | Anna | F | Utah | US | 4 | Cocodona 250M 2025 (125 hours) |
| 111578 | NOSEK | STEPHEN | M | TX | US | 8 | Rocky Raccoon 100M 2025 (30 hours) |
| 111771 | Noshay | Jaclyn | F | TN | US | 8 | Bear, The 100M 2025 (36 hours) † |
| 127435 | Nosicky | Matej | M | Slovakia | SK | 1 | Javornika 105km 2025 (24 hours) |
| 109260 | Notari | Paul | M | Massachusetts | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 124823 | Notch | Jeremy | M | California | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 121418 | Nothomb | Thomas | M | Luxembourg | BE | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 104518 | Nott | Todd | M | NE | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 107846 | Nottage | Clive | M | Buckinghamshire | GB | 4 | Autumn 100M 2025 (28 hours) |
| 124393 | Nouguier | Sarah | F | Bavaria | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 123466 | Novak | Abby | F | Alaska | US | 1 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 115494 | Novak | Matthew | M | IL | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 127754 | Novelli | Colin | M | NC | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 125246 | Novinska | Tyson | M | WI | US | 1 | Black Canyon 100km 2025 (17 hours) |
| 124498 | Novitsky | Nick | M | MI | US | 1 | Yeti Virginia 100M 2025 (30 hours) |
| 126840 | Novoa Lozano | Juan Pablo | M | Guanajuato | MX | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 108794 | Novobilski | Jen | U | Alaska | US | 2 | Cocodona 250M 2025 (125 hours) |
| 125527 | Nowicki | Summer | F | WA | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 112032 | Noyes | Peter | M | CA | US | 8 | Angeles Crest 100M 2025 (36 hours) † |
| 123329 | Nueva | Benjamin | M | DAVAO DEL SUR | PH | 2 | Hardcore Ultra Trail (HUT) 100M 2025 (44 hours) |
| 123140 | Nugent | Robert | M | West Sussex | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 117011 | Nukunuku | Jordan | M | QLD | AU | 1 | Guzzler Ultra 100km 2025 (24 hours) |
| 125880 | Numabe | Kosuke | M | Kanagawa | JP | 1 | OSJ Ontake 100km 2025 (20 hours) |
| 127420 | numao | hazuki | F | tochigi | JP | 1 | Okushinano 100km 2025 (21 hours) |
| 121686 | Nunes | Dawn | F | Kent | GB | 2 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 121195 | Nuñez | Austin | M | CA | US | 2 | Cuyamaca 100km 2025 (17 hours) |
| 115953 | Nunez | Christina | F | IL | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 121298 | Nunnenmacher | Lee | M | Ontario | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 124730 | Nyakowa | Belinda | F | Massachusetts | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 124986 | Nye | Andrea | F | Utah | US | 1 | Waldo 100km 2025 (18 hours) † |
| 127408 | Nyenhuis | Deana | F | IL | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 102160 | Nylander | Sam | M | SWE | SE | 32 | North Downs Way 100M 2025 (30 hours) |
| 105871 | Nyman | Mikael | M | SWE | SE | 16 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 107169 | O'Berry | Collin | U | NC | US | 8 | Hood Hundred 100M 2025 (34 hours) |
| 126800 | O'Boyle | Toni | F | CO | US | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 117252 | O'Brien | Colin | M | WA | US | 2 | Cocodona 250M 2025 (125 hours) |
| 117891 | O'Brien | David | M | Herefordshire | US | 4 | South Downs Way 100M 2025 (30 hours) |
| 124020 | O'Brien | Nicholas | M | Wellington | NZ | 1 | Taupo 100km 2025 (17 hours) |
| 107261 | O'Brien | Sean | M | TN | US | 16 | Vermont 100km 2025 (17 hours) |
| 100546 | O'Brien | Tracy | F | CO | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 120632 | O'Byrne | Anna | F | New Zealand | NZ | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 107212 | O'Connor | Katie | F | IL | US | 4 | Cocodona 250M 2025 (125 hours) |
| 112177 | O'Dale | Zen | M | Gloucestershire | GB | 2 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 125632 | O'Donnell | Aoife | F | Kildare | IE | 1 | Kerry Way Ultra 101km 2025 (20 hours) |
| 102968 | O'Donnell | Brendan | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 108659 | O'Donnell | Matthew | M | North Carolina | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 103874 | O'Farrell | Jitka | F | CO | US | 32 | High Lonesome 100M 2025 (37 hours) |
| 108953 | O'Farrell | Michael | M | ON | CA | 4 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 107276 | O'Gorman | Christine | F | Colorado | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 105728 | O'Hear | Carol | F | CA | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 124771 | O'Malley | Nora | F | CO | US | 1 | Cocodona 250M 2025 (125 hours) |
| 127564 | O'Neal | Joshua | M | BC | CA | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 126528 | O'Neill | Declan | M | CA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124151 | O'Rourke | Emily | F | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 116529 | O'Rourke | Michael | M | DE | US | 4 | Vermont 100M 2025 (30 hours) |
| 117377 | O'shea | Kevin | M | Co. Cork | IE | 4 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 128002 | O'Shea | Shana | F | California | US | 1 | Quicksilver 100km 2025 (17 hours) |
| 127593 | O'Toole | Annalise | F | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 127776 | O'Toole | Erin | F | ME | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 121804 | O’Brien | Kyle | M | Colorado | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 115740 | O’Brien-Smith | Claire | F | Western Australia | AU | 4 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 126470 | O’Connell | David | M | California | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 126320 | O’Connell | Melanie | F | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 110216 | O’Connor | Patrick | M | CA | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 107032 | O’Farrell | Tory | F | British Columbia | CA | 16 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 126561 | O’Rourke | Mark | M | Cheshire | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 119349 | O’Sullivan | Esther | F | Bay of Plenty | NZ | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 120856 | Oag | Steve | M | Queensland | AU | 2 | Guzzler Ultra 100km 2025 (24 hours) |
| 110258 | Oakes | Daniel | M | VA | US | 1 | Western States 100M 2025 (30 hours) † |
| 124083 | Oakley | Luke | M | Hampshire | GB | 1 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 119439 | Oaks | Heather | F | GA | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 101167 | Oatis | Doug | M | CO | US | 1 | Western States 100M 2025 (30 hours) † |
| 112548 | Obara | Michael | M | RI | US | 8 | Rocky Raccoon 100M 2025 (30 hours) |
| 122129 | Obenberger | Adam | M | CA | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 118955 | Oberto | Jeffrey | M | California | US | 4 | Mountain Lakes 100M 2025 (30 hours) † |
| 103720 | Obery | Michael | M | ZAF | ZA | 32 | Ultra-Trail Cape Town 100M 2024 (45 hours) |
| 123979 | Oboikowitsch | Madison | F | VT | US | 1 | Vermont 100M 2025 (30 hours) |
| 104074 | Oborn | Patrick | M | UT | US | 16 | Wasatch Front 100M 2025 (36 hours) † |
| 127581 | OBrien | Connor | M | MA | US | 1 | Vermont 100M 2025 (30 hours) |
| 104845 | Obrien | James | M | IL | US | 16 | Indiana 100M 2025 (30 hours) |
| 106969 | Ochaba | Joseph | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 122771 | Ochiai | Takuro | M | kanagawa | JP | 2 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 104637 | Ochoa | Angel | M | AZ | US | 64 | Javelina Jundred 100M 2025 (30 hours) † |
| 124296 | Ochoa | Luis | M | CA | US | 1 | Cocodona 250M 2025 (125 hours) |
| 126508 | Ochoa | Sean | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 101365 | Ochs | Monica | F | WA | US | 64 | High Lonesome 100M 2025 (37 hours) |
| 107373 | Ochsner | Travis | M | CA | US | 4 | Angeles Crest 100M 2025 (36 hours) † |
| 118525 | Ockerbloom | Steven | M | Connecticut | US | 4 | Zion 100km 2025 (19 hours) |
| 125981 | Oda | Katsuya | M | Tokyo | JP | 1 | OSJ Ontake 100M 2025 (24 hours) |
| 124181 | ODell | Alex | M | WV | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 101291 | Odell | David | M | CA | US | 64 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 106970 | Odell | Deanna | F | 64 | Canyons by UTMB 104km 2025 (20 hours) | ||
| 118368 | Odell | Evan | M | Berlin | DE | 4 | Istria by UTMB 168km 2025 (46 hours) |
| 121405 | Odom | Thomas | M | GA | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 125392 | ODonnell | John | M | Glasgow | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 105404 | Oederud | Thomas | M | NOR | NO | 32 | Łemkowyna Ultra-Trail 150km 2025 (35 hours) |
| 120703 | Offer | Brendan | M | NJ | US | 2 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 125384 | Offler | Chris | M | East Sussex | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 118768 | Ogawa | Ryota | M | Tochigi | JP | 4 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 112879 | OGER | GREGORY | M | BRETAGNE | FR | 2 | Swiss Canyon Trail 111km 2025 (24 hours) |
| 123849 | Ogihara | Tsukasa | M | Ohio | US | 1 | Mamba 100M 2024 (34 hours) † |
| 126231 | Ogilvie | Beatriz | F | NSW | AU | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 125412 | Ogilvie | Dan | M | NSW | US | 1 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 114411 | Ogiri | Takamichi | M | Kyoto | JP | 8 | Mt Fuji 100M 2025 (46 hours) |
| 100658 | Ogly | Krystian | M | POL | PL | 1 | Western States 100M 2025 (30 hours) † |
| 125232 | Ogrudek | Bobby | M | NY | US | 1 | Vermont 100M 2025 (30 hours) |
| 100319 | Ohler | Michael | M | DEU | DE | 32 | Swiss Alps 100M 2025 (50 hours) |
| 120844 | Ohlhausen | Christine | F | ON | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 123442 | Ohly | Shane | M | Cumbria | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 112771 | Ohm | Sarah | F | MI | US | 8 | Bigfoot 206M 2025 (100 hours) † |
| 127598 | Ohman | Ben | M | MT | US | 1 | Crazy Mountain 100M 2025 (36 hours) † |
| 123267 | Ohno | Sebun | M | Tokyo | JP | 2 | OSJ Ontake 100M 2025 (24 hours) |
| 127541 | OHSHIRO | Makoto | M | Prefecture ISHIKAWAKEN | JP | 1 | Okushinano 100km 2025 (21 hours) |
| 124004 | Okabe | Akiko | F | kanagawa | JP | 1 | Lake Biwa 100M 2025 (52 hours) |
| 122306 | Okabe | Koya | M | Tokyo | JP | 2 | Lake Biwa 100M 2025 (52 hours) |
| 125720 | Okabe | Shoko | F | MA | US | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 125450 | Okada | Kenli | M | DC | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 118910 | OKAMOTO | NAOYA | M | Kanagawa | JP | 4 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 127949 | Okano | David | M | Washington | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 120971 | Oksiuta | Lee | M | WI | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 100621 | Oktavec | Thomas | M | OH | US | 16 | Mohican 100M 2025 (32 hours) |
| 115696 | OKUI | YOHEI | M | Kanagawa | JP | 4 | HURT 100M 2025 (36 hours) † |
| 106100 | Okumura | Tomoaki | M | JPN | JP | 8 | Okushinano 100km 2025 (21 hours) |
| 113546 | OKUNOMIYA | SHUNSUKE | M | SAITAMAKEN IRUMAGUN | JP | 8 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 111147 | Oldham | Ian | M | Teeside | GB | 4 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 125811 | Oldham | Robert | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 114938 | Oleskiewicz | Martin | M | Colorado | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 105226 | Oliphant | James | M | OR | US | 256 | South Downs Way 100M 2025 (30 hours) |
| 114249 | Oliva | Michael | M | CO | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 106542 | Olivares | Adrian | M | CA | US | 64 | Miwok 100km 2025 (15:30:59 hours) |
| 127264 | Oliveira | Antonny | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 110847 | Oliveira | Ninive | F | SC | US | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 118295 | Oliver | Jason | M | BC | CA | 2 | Fat Dog 120M 2025 (48 hours) † |
| 126570 | Oliverio | Anthony | M | OH | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 113114 | Olivero | Anthony | M | nevada | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 127278 | Olivero | Kristian | M | Oklahoma | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 124234 | Olives | Travis | M | MN | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 111282 | Olivier | Alexandre | M | QC | CA | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 100664 | Olivito | Kara | F | CA | US | 16 | Wasatch Front 100M 2025 (36 hours) † |
| 111327 | OLLAGNIER | Jérôme | M | France | FR | 4 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 126532 | Ollila | Eric | M | MD | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 125696 | OLLUYN | Nathanael | M | Haute vienne | FR | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 127826 | Olmedo | Mario | M | Granada | ES | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 126500 | Olmedo | Roberto | M | Pichincha | EC | 1 | Penyagolosa 106km 2025 (26 hours) |
| 126801 | Olmstead | Farrah | F | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 116679 | Olschner | Matthew | M | AZ | US | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 103089 | Olsen | Anna | F | CA | US | 2 | San Diego 100M 2025 (32 hours) |
| 120128 | Olsen | Joanna | F | OR | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 124848 | Olshevskaya | Masha | F | BC | CA | 1 | Black Canyon 100km 2025 (17 hours) † |
| 118085 | Olson | Chelsea | F | WA | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 119907 | Olson | Gerard | M | PA | US | 2 | Zion 100km 2025 (19 hours) |
| 126091 | Olson | Hunter | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 124180 | Olson | Michael | M | IL | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 105142 | Olson | Paul | M | MN | US | 2 | Bighorn 100M 2025 (35 hours) |
| 114821 | Olszewski | Pawel | M | Bad Liebenzell | DE | 2 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 125444 | Olszewski | Piotr | M | mazowieckie | US | 1 | Łemkowyna Ultra-Trail 150km 2025 (35 hours) |
| 112192 | Olvaszto | Daniel | M | Budapest | HU | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127153 | Olwin | Katie | F | Colorado | US | 1 | Never Summer 100km 2025 (23 hours) |
| 121798 | Olzinski | Brad | M | AL | US | 2 | Pinhoti 100M 2025 (32 hours) |
| 122460 | Omori | Danielle | F | North Carolina | US | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 104517 | Ongena | Ann | F | CA | US | 64 | Hardrock 100M 2025 (48 hours) † |
| 117530 | Onikubo | Takashi | M | Tokyo | JP | 4 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 106348 | Onitsuka | Tomonori | M | JPN | JP | 32 | Javelina Jundred 100M 2025 (30 hours) † |
| 127121 | Onorato | Steve | M | ACT | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 124874 | Ontiveros | Jonathan | M | Texas | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 120215 | Oosawa | Yuu | M | TOKYO | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 113972 | oostra | maria | F | minnesota | US | 4 | IMTUF 100M 2025 (36 hours) † |
| 115899 | Opaska | Florian | M | TX | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 101830 | Opgenorth | Greg | M | CO | US | 128 | Cascade Crest 100M 2025 (34 hours) |
| 127217 | Opiński | Łukasz | M | Mazowieckie | PL | 1 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 111463 | Oravamäki | Maija | F | Pohjois-Pohjanmaa | FI | 8 | Nuts Ylläs Pallas 100km 2025 (22 hours) |
| 127657 | Orbinson | Dave | M | Warwickshire | GB | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 118712 | Orchard | Lewis | M | WI | US | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 100279 | Orders | Nathaniel | M | WV | US | 32 | Run Rabbit Run 100M 2025 (36 hours) |
| 120764 | Ordoñez | Heather | F | MD | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 123809 | ORDRONNEAU | Ludovic | M | CHARENTE | FR | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 126571 | Orejola | Cedric | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125987 | ORESTES | DYLAN | M | São Paulo | BR | 1 | Valhöll Fin del Mundo by UTMB 131km 2025 (30 hours) |
| 112383 | Orig | Rebecca | F | CO | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 119839 | Orikasa | Daisuke | M | Kanagawa | JP | 2 | Okushinano 100km 2025 (21 hours) |
| 105098 | Orillac | Jose | M | PAN | PA | 1 | Western States 100M 2025 (30 hours) † |
| 124820 | Orleow | Jennifer | F | WA | US | 1 | Mountain Lakes 100M 2025 (30 hours) |
| 123992 | Orlov | Aleksandr | M | N/A | RU | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 125459 | Orlowski | Grant | M | Illinois | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 106544 | Ormond | Wesley | M | AL | US | 64 | Bighorn 100M 2025 (35 hours) |
| 115852 | Ormsby | Yumi | F | CO | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 109710 | Ormuz | Tina | F | Dubai | AE | 4 | Bigfoot 206M 2025 (100 hours) |
| 121239 | Örn Schulz | Jonathan | M | Scotland | GB | 2 | West Highland Way 95M 2025 (30 hours) |
| 122816 | Ornelas | Tabata | F | Michigan | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 118755 | ORNELAS ARREDONDO | JACQUELINE SAMANTA | F | GUANAJUATO | MX | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126677 | Orozco | Jose | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 112729 | Orr | Brad | M | SC | US | 8 | Run Rabbit Run 100M 2025 (36 hours) † |
| 109930 | Orr | Donnie | M | WV | US | 8 | Massanutten 100M 2025 (36 hours) † |
| 124200 | Orsini Jones | Marco | M | County (optional) | GB | 1 | North Downs Way 100M 2025 (30 hours) |
| 110761 | Orstad | Carl | M | MN | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 126726 | Ortega | Raul | M | Puerto Rico | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 107605 | Ortiz | Anne | F | AZ | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 112413 | Ortiz | Chassen | F | OR | US | 1 | Western States 100M 2025 (30 hours) † |
| 120591 | Ortiz | Christopher | M | TX | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 124285 | Ortiz | Neil | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 113317 | Ortiz | Paloma | F | CA | US | 8 | Tahoe 202M 2025 (100 hours) † |
| 125810 | Ortiz Cuadra | Rodolfo | M | San José | CR | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 126883 | Ortmayer | Will | M | UT | US | 1 | Wasatch Front 100M 2025 (36 hours) |
| 124769 | Orton | Chris | M | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) |
| 122139 | Osbeck | Ryan | M | FL | US | 2 | Long Haul 100M 2025 (30 hours) |
| 125542 | Osborn | Hailey | F | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 122214 | Osborn | Sarah | F | Indiana | US | 2 | Indiana 100M 2025 (30 hours) |
| 120813 | Osborne | Joseph | M | OH | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 124169 | Osborne | Paul | M | Hampshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 125905 | Osburg | Roman | M | Bavaria | DE | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 104656 | Ose | Kazufumi | M | Nagano | JP | 64 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 108249 | Oshima | Tomio | M | AZ | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 117299 | Oshima | Zachery | M | Oregon | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 126516 | Oslon | Robert | M | Oregon | US | 1 | Waldo 100km 2025 (18 hours) † |
| 122517 | Osorio | Christian | M | CA | US | 2 | Cuyamaca 100km 2025 (17 hours) |
| 105381 | Osorio | Oscar | M | CA | US | 1 | Western States 100M 2025 (30 hours) |
| 120539 | Ossers | Elizabeth | N | MN | US | 2 | Kettle Moraine 100M 2025 (30 hours) |
| 121325 | Ostapovich | Rick | M | Ca | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 101260 | Ostaszewski | Melissa | F | AZ | US | 1 | Western States 100M 2025 (30 hours) † |
| 101620 | Ostaszewski | Sarah | F | CO | US | 256 | Cocodona 250M 2025 (125 hours) |
| 100282 | Ostlund | Henrik | M | SWE | SE | 4 | Täby Extreme Challenge 100M 2025 (30 hours) |
| 126213 | Ostojić | Nenad | M | 10000 | HR | 1 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 126936 | Ostolaza | Pablo | M | Lima | PE | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124987 | Ostrikov | Sergey | M | California | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 126095 | Ostrovsky | Aaron | M | WA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124117 | Ostuni | Renato | M | N/A | IT | 1 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 118756 | Osullivan | Jerry | M | Nsw | AU | 4 | Guzzler Ultra 100km 2025 (24 hours) |
| 114448 | Ota | Masato | M | TEXAS | US | 8 | Brazos Bend 100M 2024 (32 hours) |
| 104769 | Otaki | Yoshio | M | OR | US | 8 | Bigfoot 206M 2025 (100 hours) † |
| 117792 | Otal | Steven | M | FR | FR | 4 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 113481 | Otani | Giancarlo | M | Lima | PE | 4 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 124808 | Ott | Adam | M | WA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 109224 | Ott | Matthias | M | Bavaria | DE | 8 | Zugspitz 106km 2025 (25 hours) |
| 120063 | Ouellet | Kevin | M | QC | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 125158 | Ouellette | Samuel | M | Québec | CA | 1 | Vermont 100km 2025 (17 hours) |
| 127068 | Oussad | Frederic | M | France | US | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 126809 | Outis | Chris | M | Tennessee | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 115393 | Outram | Matt | M | Northamptonshire | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 118504 | Ovejero Sánchez | Victor | M | Salamanca | ES | 4 | Gran Trail Peñalara 110km 2025 (25 hours) |
| 122932 | Overley | Rhonda | F | AZ | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 123783 | Overton | Dana | F | AL | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 111815 | Owen | Benjamin | M | UT | US | 8 | Wasatch Front 100M 2025 (36 hours) † |
| 110221 | Owen | Timothy | M | London | GB | 4 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 116773 | Owenby | Matthew | M | GA | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 125583 | Owens | Ben | M | British Columbia | CA | 1 | Waldo 100km 2025 (18 hours) † |
| 107691 | Owens | Brent | M | CO | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 123895 | Owens | David | M | Ok | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 107318 | Owens | Nathan | M | UT | US | 4 | Bear, The 100M 2025 (36 hours) |
| 100920 | Owens | Todd | M | AB | CA | 128 | Lost Soul Ultra 100km 2025 (21 hours) |
| 124137 | Owens | Wesley | M | NC | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 123827 | Oyala | Tonya | F | OR | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 118743 | Oyama | Naoki | M | Shinjuku Ichigayanakanocho | JP | 4 | Transjeju by UTMB 107km 2025 (25 hours) |
| 121061 | Ozaki | Maki | F | Chiba | JP | 2 | Lake Biwa 100M 2025 (52 hours) |
| 115499 | Ozanne | William | M | CT | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 109783 | Øvstehage | Vemund | M | Trøndelag | NO | 4 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 127155 | Paaso | Tapio | M | Mäntsälä | FI | 1 | Transgrancanaria 125km 2025 (28 hours) |
| 120213 | Paauwe | Reinier | M | AB | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 116037 | Pacconi | Yumei | F | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124313 | Pace | Travis | M | NC | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 112497 | Pacheco | Federico | M | Cartago | CR | 1 | Western States 100M 2025 (30 hours) † |
| 125022 | Pacheco | John | M | VA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 112079 | PACKER | KRAIG | M | UT | US | 8 | Bear, The 100M 2025 (36 hours) † |
| 113462 | Paczkowski | Patrick | N | VA | US | 8 | Massanutten 100M 2025 (36 hours) † |
| 109619 | Padovan | Anna | F | VA | IT | 4 | Tuscany Crossing 103km 2025 (21 hours) |
| 105964 | Page | Adam | M | IA | US | 64 | Eastern States 100M 2025 (36 hours) |
| 124297 | Page | Jesse | M | Indiana | US | 1 | Indiana 100M 2025 (30 hours) |
| 125447 | Page | Sarah | F | United Kingdom | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 108892 | Page | Vinny | M | BERKSHIRE | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 125848 | Pageau | Isabelle | F | AB | CA | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 115655 | Pai | Yun-Yi | M | CA | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 124258 | Paillard | Alexandre | M | QC | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 124603 | PAILLARD | JEROME | M | france | FR | 1 | Swiss Canyon Trail 100M 2025 (44 hours) |
| 120326 | Paillet | Sebastien | M | Paris | FR | 2 | Swiss Canyon Trail 111km 2025 (24 hours) |
| 119424 | Painter | Robert | M | Michigan | US | 2 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 125736 | Palacios | Sal | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 109932 | Palamar | Mark | M | FL | US | 16 | Long Haul 100M 2025 (30 hours) † |
| 101181 | Palandri | Shawn | M | IL | US | 32 | Indiana 100M 2025 (30 hours) |
| 116929 | Palen | Andrew | M | NY | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 113854 | Palen | Tim | M | OH | US | 8 | Pinhoti 100M 2025 (32 hours) † |
| 125509 | Palfini | Damian | M | California | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 104391 | Palframan | James | M | BC | CA | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 110918 | Palilla | Matt | U | OR | US | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 117117 | Pallavicini | Nicola | M | Alessandria Province | IT | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 103879 | Palles | Neal | M | CO | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 118605 | Palm | Brett | M | CO | US | 4 | Moab 238M 2025 (108 hours) † |
| 126132 | Palm | David | M | OREGON | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 104352 | Palma | Julio | M | Pennsylvania | US | 32 | Hardrock 100M 2025 (48 hours) † |
| 123110 | Palmer | Adam | M | Auckland | NZ | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 124523 | Palmer | Luke | M | TX | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 126542 | Palmer | Rusty | M | MS | US | 1 | No Business 100M 2025 (34 hours) |
| 114956 | Palmer | Scott | M | washington | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 122099 | Palmer | Terry | M | Texas | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 104811 | Palmer | William | M | GA | US | 64 | Cruel Jewel 106M 2025 (48 hours) † |
| 114447 | Palo | Kertu | F | California | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124333 | Paltzer | Joe | M | Wisconsin | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 124193 | Palus | Katie | F | OH | US | 1 | Mohican 100M 2025 (32 hours) |
| 127908 | Palvetti | Marco | M | italia | IT | 1 | Tuscany Crossing 160km 2025 (35 hours) |
| 122053 | Pan | Chunhua | F | Ontario | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 107606 | Panas | Robert | M | Colorado | US | 16 | High Lonesome 100M 2025 (37 hours) |
| 127158 | Panasuk | Josh | M | Mt | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 120809 | Pancake | Mark | M | OH | US | 2 | Vermont 100M 2025 (30 hours) |
| 112466 | Panes | Arvin | M | Devon | GB | 8 | Istria by UTMB 168km 2025 (46 hours) |
| 106278 | Pang | Siu Chuen | M | HKG | HK | 1 | Western States 100M 2025 (30 hours) † |
| 127575 | panizoni | luciana | F | Buenos Aires | AR | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 120975 | Pannetier | Will | M | WA | US | 2 | San Diego 100M 2025 (32 hours) † |
| 119398 | Panowicz | Gregory | M | GA | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 126070 | Panrod | Sittichai | M | Nakhon Si Thammarat | TH | 1 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 111083 | Pantis | Alena Maria | F | Hessen | DE | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 111450 | Panula | Mikko | M | - | FI | 4 | Nuts Ylläs Pallas 100km 2025 (22 hours) |
| 124492 | PAPA | Peggie | F | Grand Est | FR | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 127762 | Papadopoulos | Alexander | M | VA | US | 1 | HURT 100M 2025 (36 hours) † |
| 127851 | Papavizas | Aidan | M | VA | US | 1 | Never Summer 100km 2025 (23 hours) |
| 107924 | Papay | Brian | M | Ohio | US | 16 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 118004 | Papay | Rachel | F | Ohio | US | 4 | Mohican 100M 2025 (32 hours) |
| 118220 | Pape | Eric | M | CA | US | 4 | Never Summer 100km 2025 (23 hours) |
| 124815 | Papert | Markus | M | Bayern | DE | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 111979 | Papet | Pierre | M | Greater London | GB | 8 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 118862 | Papini | Davide | M | AG | CH | 4 | Patagonia 100M 2025 (42 hours) |
| 117130 | Paprcka | Michal | M | N/A | SK | 4 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 119705 | Paprowicz | Wojciech | M | Mazowieckie | PL | 2 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 126165 | Paquet Houde | Antoine | M | Quebec | CA | 1 | Vermont 100km 2025 (17 hours) |
| 127339 | Paquis | Loic | M | Franche comte | FR | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 114923 | Paradis | Hugo | M | QC | US | 4 | Moab 238M 2025 (108 hours) † |
| 100338 | Paradise | Jeff | M | SC | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 100837 | Paras | Emma | F | CO | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 123275 | Parcheminal | Romain | M | France | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 107901 | Pardoux | Adam | M | MN | US | 2 | Superior 100M 2025 (38 hours) † |
| 113486 | Pardue | Duran | M | NC | US | 8 | Tahoe 202M 2025 (100 hours) † |
| 101091 | Pardy | Robert | M | CA | US | 4 | Cuyamaca 100km 2025 (17 hours) † |
| 117131 | Parent | Olivier | M | France | FR | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 121007 | Parent | Romain | M | Normandie | FR | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125498 | Parikh | Baiju | M | OH | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 115425 | Paris | Raphael | M | Nordrhein-Westfalen | DE | 2 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 115054 | PARIS | THIERRY | M | GIRONDE | FR | 2 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 106611 | Parise | Justin | M | SA | AU | 16 | Surf Coast Century 100km 2025 (17 hours) |
| 122431 | Park | Bo min | F | Seoul | KR | 2 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 125713 | Park | David | M | CA | US | 1 | Moab 238M 2025 (108 hours) † |
| 103732 | Park | James | M | HKG | HK | 64 | Taupo 100km 2025 (17 hours) |
| 127655 | Park | Jihae | F | Seoul | KR | 1 | Transjeju by UTMB 107km 2025 (25 hours) |
| 126353 | Park | JS | M | NY | US | 1 | Swiss Alps 100M 2025 (50 hours) |
| 123805 | Park | Samuel | M | CA | US | 1 | San Diego 100M 2025 (32 hours) † |
| 127741 | PARK | SANGSEOK | M | . | KR | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 119076 | park | sungjae | M | bundang gu | KR | 2 | TransLantau Ultra Trail by UTMB 120km 2024 (36 hours) |
| 120572 | Park | Tyler | M | Oregon | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 107869 | Parker | Bradley | M | NC | US | 16 | Umstead 100M 2025 (30 hours) |
| 113251 | Parker | Christopher | M | MA | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 122406 | Parker | Eric | M | AL | US | 2 | Pinhoti 100M 2025 (32 hours) † |
| 126591 | Parker | Grant | M | ca | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 127500 | Parker | Laila | F | CO | US | 1 | Never Summer 100km 2025 (23 hours) |
| 117716 | Parker | Lance | M | Oklahoma | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 118187 | Parker | Meredith | F | Ontario | CA | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 117749 | Parker | Mitchell | M | AZ | US | 2 | Zion 100M 2025 (36 hours) † |
| 103998 | Parker | Morgan | M | OR | US | 128 | Hood Hundred 100M 2025 (34 hours) |
| 127234 | PARKER | SANDRA | F | MS | US | 1 | Hennepin 100M 2025 (30 hours) |
| 106496 | Parker | Shaun | M | AB | CA | 64 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 107399 | Parker | Thomas | M | Floirda | US | 16 | Yeti Virginia 100M 2025 (30 hours) |
| 123872 | parker | warwick | M | Hampshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 126637 | Parkhurst | Heidi | F | Ia | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 100878 | Parks | Casey | M | CA | US | 4 | San Diego 100M 2025 (32 hours) † |
| 116585 | Parks | Charles | M | WY | US | 4 | Bighorn 100M 2025 (35 hours) |
| 114680 | Parks | Charlie | M | CA | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 106977 | Parks | Raymond | M | 8 | Thames Path 100M 2025 (30 hours) | ||
| 123547 | Parnell | Brad | M | Texas | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 106978 | Parnell | Chase | M | 64 | Cuyamaca 100km 2025 (17 hours) † | ||
| 106662 | Parnell | William | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 120192 | Parpart | Andrew | M | Ohio | US | 2 | Canal Corridor 100M 2025 (30 hours) † |
| 114948 | Parra | Carlos | M | Barcelona | ES | 4 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 122217 | Parra | Eugenio | M | Las condes | CL | 2 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 125671 | Parra | Jesus | M | CA | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 103508 | Parra | Juan | M | CA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 118419 | Parra | Martina | F | California | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 125879 | Parrella | John | M | TX | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 123831 | Parrish | Dustin | M | WI | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 126051 | Parrish | Jennifer | F | WA | US | 1 | Cocodona 250M 2025 (125 hours) |
| 118039 | Parsons | Conner | M | AL | US | 4 | Wasatch Front 100M 2025 (36 hours) † |
| 113346 | Parsons | Matthew | M | NSW | AU | 8 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 112742 | Parsons | Shawn | M | Alberta | CA | 8 | Lost Soul Ultra 100M 2025 (33 hours) |
| 115874 | Partyka | Darren | M | Nevada | US | 4 | Tahoe 202M 2025 (100 hours) † |
| 123832 | Parubcenko | Kiril | M | Vilnius | LT | 1 | Transjeju by UTMB 150km 2025 (37 hours) |
| 126920 | Pasamar Lopez | Raul | M | Madrid | ES | 1 | Transgrancanaria 125km 2025 (28 hours) |
| 122991 | Pascal | Adrien | M | Savoie | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 117461 | Paschke | Chris | M | TX | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 127738 | Pashley | Elliott | M | West Yorkshire | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 127928 | Pask | Andrea | F | BC | CA | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 115334 | Pasnick | Marisa | F | WA | US | 4 | Pine to Palm 100M 2025 (34 hours) † |
| 124545 | Passarelli | Dominic | M | OR | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 108896 | Passenti | Brian | M | Colorado | US | 8 | Leadville Trail 100M 2025 (30 hours) |
| 124240 | Passmore | Erick | N | CO | US | 1 | Cocodona 250M 2025 (125 hours) |
| 119499 | Passmore | Jonah | M | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 124978 | Pastor | Lissete | F | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 116030 | Pastore | Guido | M | Italy | IT | 4 | Ultra Trail Vipava Valley 106km 2025 (25 hours) |
| 126347 | Pastrnak | Austin | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 125727 | Paszko | Amanda | F | Utah | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 118954 | Patapoff | Jacob | M | Ca | US | 4 | Cuyamaca 100km 2025 (17 hours) † |
| 123478 | Patch | Jeremy | M | Qld | AU | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 106292 | Patel | Devang | M | NJ | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 102270 | Patent | Jason | M | CA | US | 2 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 123794 | Paterno | Ivan | M | Italy | IT | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 123989 | Paterno | Thomas | M | Italy | IT | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 123922 | Patil | Kunal | M | Maharashtra | IN | 1 | Javornika 105km 2025 (24 hours) |
| 121884 | Patout | Benjamin | M | gard | FR | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 106388 | Patrick | Sean | M | CA | US | 128 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 124357 | Pattee | Mikal | M | Oregon | US | 1 | Mountain Lakes 100M 2025 (30 hours) † |
| 125216 | Patten | Andrea | F | MN | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 125214 | Patten | George | M | MN | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 116656 | Patterson | Benje | M | Otago | NZ | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 118031 | Patterson | Daniel | M | MO | US | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 113270 | Patterson | Greg | M | CA | US | 4 | Leona Divide 100M 2025 (33 hours) † |
| 120427 | Patterson | Jared | M | Ohio | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 124315 | Patterson | Matthew | M | NC | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 101913 | Patterson | Sam | M | CA | US | 128 | Canyons by UTMB 104km 2025 (20 hours) |
| 122170 | Pattijn | Ernest | M | West-Vlaanderen | BE | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 116156 | Pattillo | Paul | M | Utah | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 109520 | Pattison | Kristina | F | OR | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123722 | Patton | Corky | M | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 107656 | Patton | Michael | M | Ohio | US | 16 | Mohican 100M 2025 (32 hours) |
| 115059 | Patton | Theresa | F | FL | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 123993 | Paukner | Manuel | M | Bavaria | DE | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 123675 | Paul | Amanda | F | NH | US | 1 | Vermont 100M 2025 (30 hours) |
| 116756 | Paul | Andrew | M | CA | US | 4 | San Diego 100M 2025 (32 hours) † |
| 105747 | Paul | Andrew | M | AUS | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 117462 | Paul | Jeffrey | M | Ontario | CA | 4 | Sulphur Springs 100M 2025 (30 hours) |
| 120237 | Paul | Louisa | F | CO | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 115453 | Paulazzo | Bryon | M | MN | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 122825 | Pauley | Joshua | M | AR | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 124558 | Paulson | David | M | CA | US | 1 | San Diego 100M 2025 (32 hours) |
| 121881 | Paulson | Lauren | F | PA | US | 2 | No Business 100M 2025 (34 hours) |
| 125468 | Paulson | Ryan | M | MN | US | 1 | Superior 100M 2025 (38 hours) † |
| 115106 | Pauly | Dale | M | CA | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 123013 | Pauwels | Damien | M | Alpes maritimes | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124747 | PAVALEC | ANDREJ | M | Maribor | SI | 1 | Ultra Trail Vipava Valley 165km 2025 (46 hours) |
| 110944 | Pavelka | Ondrej | M | Czech Republic | CZ | 4 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 112170 | Pavlova | Aneta | F | MO | US | 4 | Hennepin 100M 2025 (30 hours) † |
| 105528 | Pavy | Hadrien | M | FRA | FR | 2 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 102355 | Pawlak | Angela | F | WA | US | 32 | Waldo 100km 2025 (18 hours) † |
| 111854 | Pawlus | Michael | M | OH | US | 8 | Laurel Highlands 70.5M 2025 (20 hours) |
| 105942 | Paxton | Ben | M | AZ | US | 64 | Black Canyon 100km 2025 (17 hours) † |
| 111779 | Paxton | Emma | F | VA | US | 8 | Hellgate 100km 2024 (17 hours) |
| 111652 | Paxton | Will | M | VA | US | 4 | Hellgate 100km 2024 (17 hours) |
| 126848 | Payne | Ali | F | ACT | AU | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 112114 | Payne | Brandi | F | HI | US | 8 | HURT 100M 2025 (36 hours) † |
| 105641 | Payne | Daniel | M | TX | US | 32 | Javelina Jundred 100M 2025 (30 hours) † |
| 116463 | Payne | Dave | M | CS | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 126036 | Payne | Eric | M | TN | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 109076 | Payne | Helen | F | California | US | 16 | High Lonesome 100M 2025 (37 hours) |
| 119203 | Payne | Kyle | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 123933 | Payne | Patrick | M | NSW | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 102586 | Payne | Rob | M | GBR | GB | 4 | South Downs Way 100M 2025 (30 hours) |
| 112442 | Payne | Shannon | F | WA | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 127861 | Paz Rendal | Jose | M | Tokyo | JP | 1 | Okushinano 100km 2025 (21 hours) |
| 103945 | Peacock | Joseph | M | OR | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 111237 | Pearce | David | M | Australian Capital Territory | AU | 8 | Buffalo Stampede 100km 2025 (23 hours) |
| 121498 | Pearce | Jay | M | OR | US | 2 | Mountain Lakes 100M 2025 (30 hours) † |
| 100745 | Pearce | Lance | M | CO | US | 1 | Western States 100M 2025 (30 hours) † |
| 127522 | Pearce | Robert | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 125227 | Pearce | Tomas | M | Hawaii | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 126789 | Pearlman | Jenny | F | NY | US | 1 | Sedona Canyons 125M 2025 (52 hours) |
| 124938 | Pearlman | Michael | M | WY | US | 1 | Never Summer 100km 2025 (23 hours) |
| 102661 | Pearson | Andy | M | CA | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 110593 | Pearson | Larry | M | TX | US | 1 | Western States 100M 2025 (30 hours) † |
| 125291 | Pearson | Tyler | M | TX | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 117026 | Pease | David | M | UT | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 111512 | Pecher | Christian | M | Bavaria | DE | 8 | SwissPeaks 100km 2025 (28 hours) |
| 111248 | Peck | Graham | M | MD | US | 4 | Umstead 100M 2025 (30 hours) |
| 103826 | Pecoul | Olivier | M | FRA | FR | 1 | Western States 100M 2025 (30 hours) † |
| 120778 | PECOUT | DAVID | M | GIRONDE | FR | 2 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 106982 | Peddy | Andrew | M | VA | US | 32 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 116073 | Pederson | Nels | M | WA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 124905 | Pederson | Trace | M | Colorado | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 109146 | Pediac | Jakub | M | Slovakia | SK | 16 | Javornika 105km 2025 (24 hours) |
| 120639 | Pedlar | Tom | M | ON | CA | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 104942 | Pedraza Vega | Maria | F | Baja California | MX | 128 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 103653 | Peebles | Jt | M | NE | US | 2 | HOKA Bandera 100km 2025 (17 hours) |
| 126266 | Peelen | Anthony | M | Liege | US | 1 | Lakeland 100M 2025 (40 hours) |
| 112570 | Peers | Brian Matthew | M | Berkshire | GB | 8 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 103191 | Peeters | Natalee | F | BC | CA | 32 | Black Canyon 100km 2025 (17 hours) |
| 111720 | Pegram | Helen | F | MT | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 107284 | Peharda | Matt | M | Oregon | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 125629 | Peirce | Jason | M | WI | US | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 121822 | Peitz | Jeff | M | Oregon | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 109488 | PELISSON | Vincent | M | Ain | FR | 2 | Swiss Alps 100M 2025 (50 hours) |
| 120589 | Pelky | Joseph | M | CO | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 110382 | Pelland | Marie-Eve | F | Québec | CA | 4 | Vermont 100km 2025 (17 hours) |
| 124626 | PELLETANT | Jeremy | M | British Colombia | CA | 1 | TransLantau Ultra Trail by UTMB 120km 2024 (36 hours) |
| 105029 | Pelletier | Flavie | F | BC | CA | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 123319 | Pelletier | Paul | M | CA | US | 2 | Waldo 100km 2025 (18 hours) † |
| 127634 | Pelletier | Paul | M | Québec | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 114305 | PELLETIER | RYAN | M | MA | US | 4 | Vermont 100M 2025 (30 hours) |
| 119370 | Pellizzer | Gayle | F | CA | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 126871 | Peltz | Alon | M | MA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 102487 | Pemberton | Steve | M | NZL | NZ | 1 | Western States 100M 2025 (30 hours) † |
| 100238 | Pemsel | Dennis | M | DEU | DE | 64 | Swiss Alps 100M 2025 (50 hours) |
| 121049 | Pen | Elliott | M | Ontario | CA | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 102640 | Pena | Miguel | M | TX | US | 256 | Beaverhead 100km 2025 (20 hours) |
| 101872 | Pence | Ethan | M | CA | US | 32 | Angeles Crest 100M 2025 (36 hours) † |
| 116906 | pendleton | joseph | M | Idaho | US | 4 | Run Rabbit Run 100M 2025 (36 hours) † |
| 126440 | peng | Qian | F | Zhejiang | CN | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 121693 | Peng | Xiaohang | M | Gelderland | NL | 2 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 115135 | Penkman | Jed | M | Marlborough | NZ | 4 | Tarawera by UTMB 100M 2025 (36 hours) |
| 125416 | Penman | Kyle | M | Ut | US | 1 | Bighorn 100M 2025 (35 hours) |
| 118281 | Penn | Michael | M | PA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 100390 | Penner | Greg | M | MB | CA | 8 | Black Canyon 100km 2025 (17 hours) † |
| 125282 | Penner | Terence | M | Manitoba | CA | 1 | Black Canyon 100km 2025 (17 hours) † |
| 109517 | Pennington | Joel | M | CA | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 103368 | Pennington | John | M | ID | US | 16 | Vermont 100M 2025 (30 hours) |
| 127192 | Pennisi | Christian | M | NV | US | 1 | No Business 100M 2025 (34 hours) |
| 115701 | Penson-Boucher | Joanne | F | Alberta | CA | 2 | Mamba 100M 2024 (34 hours) † |
| 106284 | Penzone | Peter | M | OH | US | 32 | Umstead 100M 2025 (30 hours) |
| 122628 | Pepin | Joel | M | Maine | US | 2 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 103150 | Pepper | Courtney | F | ON | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 101299 | Perarnaud | Jean | M | CO | US | 4 | Bighorn 100M 2025 (35 hours) |
| 115214 | Percy | Jerad | M | Alberta | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 126458 | perea | jacob | M | NM | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 125354 | Perelli | Michael | M | WI | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 126283 | Perez | Allan | M | Maryland | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 125967 | perez | daniel | M | montevideo | UY | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 112035 | Perez | Jean | M | TX | US | 8 | Cruel Jewel 106M 2025 (48 hours) † |
| 124894 | Perez | Marvin | M | CA | US | 1 | Sean O'Brien 100km 2025 (17 hours) † |
| 110131 | Perez | Melissa | F | CA | US | 8 | Rio Del Lago 100M 2025 (30 hours) |
| 100447 | Perez Colon | Francisco | M | PR | PR | 64 | Sean O'Brien 100km 2025 (17 hours) † |
| 126219 | PEREZ GUTIERREZ | FRANCISCO JAVIER | M | Canarias | ES | 1 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 126457 | Pérez Jové | Martí | M | N/A | ES | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 106579 | Perez Leon | Pablo | M | TX | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 125907 | Perez Vera | Juan Carlos | M | Murcia | ES | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 105301 | Pergolizzi | James | M | NY | US | 16 | Worlds End 100km 2025 (19 hours) |
| 101287 | Perhac | Stephen | M | NC | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 122115 | Perin | Charles | M | BC | CA | 2 | HURT 100M 2025 (36 hours) |
| 113421 | Perini | Francesco | M | Italy | IT | 8 | Tuscany Crossing 103km 2025 (21 hours) |
| 117334 | Perkes | Kohle | M | Utah | US | 4 | Bighorn 100M 2025 (35 hours) |
| 123413 | Perkins | Kristi | F | OK | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 126796 | Perkins | Sarah | F | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 121874 | Pernet | Jonathan | M | Bern | CH | 2 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 119335 | Perramond | Eric | M | CO | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 124540 | Perreault | Simon | M | Quebec | CA | 1 | Vermont 100km 2025 (17 hours) |
| 100607 | Perreault | Xavier | M | QC | CA | 64 | Crazy Mountain 100M 2025 (36 hours) † |
| 110402 | Perrell | Josh | M | CALIFORNIA | US | 16 | San Diego 100M 2025 (32 hours) † |
| 108284 | Perriard | Real | M | Ontario | CA | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126592 | Perrin | David | M | Sarthe | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 111027 | Perrin | Fabrice | M | RA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126117 | Perrin | Zach | M | MT | US | 1 | Black Canyon 100km 2025 (17 hours) |
| 115237 | Perrin-Ganier | Neilo | M | Geneva | CH | 2 | Gran Trail Courmayeur 100km 2025 (28 hours) |
| 127836 | Perrin-Reymond | Basile | M | Hauts-de-Seine | FR | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 124668 | Perron | Jade | F | QC | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 101826 | Perron | Stephan | M | QC | CA | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 116702 | Perrot | Florent | M | Rhône | FR | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 119788 | Perrot | Guillaume | M | Zurich | CH | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 122234 | Perry | Blake | M | CA | US | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 113230 | perry | thomas | M | AB | CA | 8 | Lost Soul Ultra 100km 2025 (21 hours) |
| 124674 | Perry | Tom | N | British Columbia | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 101752 | Persaud | Harry | M | OH | US | 16 | Canyons by UTMB 100M 2025 (35 hours) |
| 122791 | Persels | Matthew | M | Texas | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 110212 | Persic | Mauro | M | Croatia | HR | 16 | Dalmacija Ultra Trail 122km 2025 (32 hours) |
| 118099 | Persson | Fredrik | M | Västra Götalands Län | SE | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127309 | Persson | Katarina | F | Skåne | SE | 1 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 127343 | Pertz | Natalie | F | DC | US | 1 | Burning River 100M 2025 (30 hours) |
| 121332 | Peshall | Will | M | NV | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 126697 | Pesiö | Jarmo | M | Lappi | FI | 1 | Nuts Ylläs Pallas 160km 2025 (35 hours) |
| 111096 | Petancic | Sacha | M | CA | US | 4 | Tahoe 202M 2025 (100 hours) † |
| 112046 | Peter | Mike | M | MI | US | 8 | Tunnel Hill 100M 2024 (30 hours) † |
| 104812 | Peterman | David | M | OH | US | 1 | Western States 100M 2025 (30 hours) † |
| 117159 | peters | john | M | NC | US | 2 | No Business 100M 2025 (34 hours) |
| 125779 | Peters | Michael | M | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 127367 | Peters | Steven | M | AB | CA | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126111 | Peters | Stirling | M | BC | CA | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 126323 | Peters | Tyler | M | Alabama | US | 1 | Pinhoti 100M 2025 (32 hours) |
| 108225 | Petersen | Drew | M | CO | US | 16 | Leadville Trail 100M 2025 (30 hours) |
| 111887 | Petersen | John | M | CA | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126831 | Petersen | Lucas | M | WA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 117804 | Peterson | Chris | M | CA | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 124538 | Peterson | Christopher | M | Coloraso | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 124784 | Peterson | Christopher | M | NC | US | 1 | Cruel Jewel 106M 2025 (48 hours) † |
| 117308 | Peterson | Eleni | F | NH | US | 4 | Vermont 100km 2025 (17 hours) |
| 101837 | Peterson | Gabe | M | CA | US | 1 | Western States 100M 2025 (30 hours) |
| 127019 | Peterson | George | M | WI | US | 1 | Superior 100M 2025 (38 hours) † |
| 102268 | Peterson | Jake | M | IL | US | 2 | Vermont 100M 2025 (30 hours) |
| 102531 | Peterson | Jeremy | M | ID | US | 64 | Beaverhead 100km 2025 (20 hours) |
| 117035 | Peterson | Kyle | M | WA | US | 4 | Oregon Cascades 100M 2025 (32:01:18 hours) † |
| 126861 | Peterson | Marc | M | Illinois | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 123666 | Peterson | Michael | M | WA | US | 1 | Mountain Lakes 100M 2025 (30 hours) † |
| 106986 | Peterson | Nicholas | M | CO | US | 1 | Western States 100M 2025 (30 hours) † |
| 127971 | Peterson | Paige | F | WI | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 120344 | Peterson | Scott | M | KY | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 102233 | Peterson | Thomas | M | PA | US | 64 | Rio Del Lago 100M 2025 (30 hours) |
| 104866 | Peterson | Trevor | M | NM | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 104408 | Peterson | Tyler | M | FL | US | 4 | Hood Hundred 100M 2025 (34 hours) |
| 107914 | Pethe | Michael | M | Grisons | CH | 4 | Grossglockner UltraTrail 110km 2025 (28 hours) |
| 124708 | Petitte | Benjamin | M | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 113991 | Petker | Andreas | M | Utah | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 115813 | Petouvis | Greg | M | Minnesota | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 109531 | Petrenko | Maksym | M | MD | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 113895 | Petrequin | Paul | M | California | US | 4 | Waldo 100km 2025 (18 hours) † |
| 104281 | Petretto | Stephen | M | OR | US | 128 | Pine to Palm 100M 2025 (34 hours) † |
| 113409 | PETRIAT | Guillaume | M | Ile de France | FR | 2 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 119870 | Petrie | Jared | M | ID | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 120830 | Petrilin | Yevgeny | M | TX | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 126737 | Petrilli | Blair | F | Maryland | US | 1 | Rim to River 100M 2025 (32 hours) |
| 107880 | Petrillo | Michelle | F | CA | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 127708 | Petrin | Joseph | M | ME | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 116206 | Petroski | Ben | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 126713 | Pettersen | Jonas | M | Oslo | NO | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 112462 | Petterson | Nick | M | TX | US | 8 | HOKA Bandera 100km 2025 (17 hours) |
| 103035 | Pettinger | Michele | F | CA | US | 32 | Tunnel Hill 100M 2024 (30 hours) † |
| 124892 | Pettit | Alan | M | Tennessee | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 126934 | Pezzati | Parker | M | TN | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 110683 | Pfaff | Dustin | M | CA | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 126000 | Pfaffenroth | Lucas | M | Wisconsin | US | 1 | Transjeju by UTMB 150km 2025 (37 hours) |
| 103267 | Pfeffer | Wayne | M | CA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 120132 | Pfenning | Ryan | M | MA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 127750 | Pfleiderer | Maxwell | M | California | US | 1 | San Diego 100M 2025 (32 hours) † |
| 100483 | Pfluger | Tim | M | PA | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 120167 | Pflum | David | M | IN | US | 2 | Grindstone by UTMB 100M 2025 (36 hours) |
| 125999 | Pham | Jonathan | M | CO | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 100399 | Pham | Nam | M | CA | US | 16 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 111162 | Pham | Nate | M | UT | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 127659 | Pham | Nick | N | OR | US | 1 | Mountain Lakes 100M 2025 (30 hours) † |
| 126852 | PHAM | THANH HOA | F | Ho Chi Minh | VN | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 127368 | Pham Xuan | Hung | F | none | VN | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 105926 | Phelan | Tim | M | CA | US | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 125665 | Phelps | Aleta | F | BC | CA | 1 | Fat Dog 120M 2025 (48 hours) † |
| 106022 | Phenix | Lindsay | F | CA | US | 32 | Cruel Jewel 106M 2025 (48 hours) † |
| 120406 | Philip | Ashic | M | CA | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 125620 | Philipsen | Harold | M | Virginia | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 113770 | Phillips | Bradley | M | NSW | AU | 4 | Buffalo Stampede 100km 2025 (23 hours) |
| 125817 | Phillips | Casey | M | PA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 124631 | Phillips | Connor | M | WY | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 124801 | Phillips | Drew | M | CA | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 127587 | Phillips | Joni | F | CA | US | 1 | Zion 100km 2025 (19 hours) |
| 120097 | Phillips | Justin | M | Tennessee | US | 2 | No Business 100M 2025 (34 hours) |
| 117164 | Phillips | Kingsley | M | Norfolk | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 121404 | Phillips | Luke | M | CO | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 121796 | Phillips | Mason | M | CA | US | 2 | Moab 238M 2025 (108 hours) † |
| 111508 | Phillips | Richard | M | London | GB | 8 | South Downs Way 100M 2025 (30 hours) |
| 122664 | Phillips | Ryan | M | Calify | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 102770 | Phillips | Rylan | M | OR | US | 64 | Hood Hundred 100M 2025 (34 hours) |
| 108644 | Phillips | Simon | M | London | GB | 16 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 114946 | Philpott | Ian | M | CA-AB | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 123858 | Photinee | Sungkrit | M | Oregon | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 107844 | Piala | Chad | M | CO | US | 16 | Hardrock 100M 2025 (48 hours) † |
| 126401 | Pianesi | Riccardo | M | Italy | IT | 1 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 118678 | Piani | Alessandro | M | Sondrio | IT | 4 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 105009 | Piatek | Mateusz | M | POL | PL | 16 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 107612 | Picard | Francis | M | CO | US | 16 | HURT 100M 2025 (36 hours) † |
| 102705 | Picard | Sebastien | M | FRA | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 126154 | Piccone | Ashley | F | CA | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 125083 | Pichan | Michael | M | NC | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 116398 | Pick | Jon | M | England | GB | 4 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 125566 | Pickens | Amy | F | TN | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 126771 | pickering | cameron | M | British Columbia | CA | 1 | Fat Dog 120M 2025 (48 hours) |
| 124041 | Pickering | Harry | M | Hampshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 113531 | Pickering | Julie | F | NA | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 118559 | Pickerl | Andrew | M | MB | CA | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 122596 | Pidgeon | Chris | M | Cheshire | GB | 2 | Lakeland 100M 2025 (40 hours) |
| 103788 | Piecha | Artur | M | POL | PL | 1 | Western States 100M 2025 (30 hours) † |
| 107255 | Piel | Sebastian | M | Rheinland-Pfalz | DE | 16 | Grand Raid Ventoux by UTMB 124km 2025 (30 hours) |
| 100329 | Piepgrass | Ammon | M | GBR | GB | 32 | SwissPeaks 360km 2025 (156 hours) |
| 121063 | Pierce | Hollie | F | CA | US | 2 | Angeles Crest 100M 2025 (36 hours) † |
| 122497 | Pierce | Jeffrey | M | Colorado | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 102429 | Pierson | Jason | M | CA | US | 64 | Canyons by UTMB 100M 2025 (35 hours) |
| 111936 | Pies | Stefan | M | Oregon | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 120152 | Pietrantoni | Domenico | M | Italia | IT | 2 | Tuscany Crossing 103km 2025 (21 hours) |
| 115638 | piette | brian | M | California | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 118494 | PIGNOL | GHISLAIN | M | NOUVELLE AQUITAINE | FR | 4 | Transgrancanaria 125km 2025 (28 hours) |
| 110020 | Pikh | Yuriy | M | Madrid | ES | 2 | Gran Trail Peñalara 110km 2025 (25 hours) |
| 125936 | Pilbeam | Adrian | M | Nottinghamshire | GB | 1 | Valleys Ultra (13) 180km 2025 (46.5 hours) |
| 117946 | Pillinger | Anna | F | NSW | AU | 4 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 109461 | Pilon | Brent | M | Ontario | CA | 16 | Quebec Mega Trail 135km 2025 (32 hours) |
| 125619 | Pilote Fortin | Helene | F | Quebec | CA | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 112474 | Pilz | Michael | M | Az | US | 1 | Western States 100M 2025 (30 hours) † |
| 114266 | Pino | Bon | M | NV | US | 8 | Wasatch Front 100M 2025 (36 hours) † |
| 119844 | Pinski | Felipe | M | Great Manchester | GB | 2 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 109727 | Pinsonneault | Yves | M | MD | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 100703 | Pinsuvana | Kanin | M | THA | TH | 16 | Lake Biwa 100M 2025 (52 hours) |
| 127926 | Piper | Mitchell | M | New York | US | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 114546 | Piplani | Amit | M | ca | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 125171 | Pire | RJ | M | WI | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 120731 | Pires | Nuno | M | Paris | FR | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 124768 | Pirtle | Greg | M | TN | US | 1 | No Business 100M 2025 (34 hours) |
| 127841 | Pisano | Kat | F | Colorado | US | 1 | Bighorn 100M 2025 (35 hours) |
| 106994 | Pisarski | Joanna | F | Oregon | US | 64 | Crazy Mountain 100M 2025 (36 hours) † |
| 101113 | Pise | Pradeep | M | CA | US | 64 | Quicksilver 100km 2025 (17 hours) † |
| 102998 | Piskorska | Anna | F | PA | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 125058 | Pitcairn | Roland | M | CO | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 122741 | Pittman | Nathan | M | Alberta | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 110627 | Pitts | Gregory | M | CA | US | 16 | Quicksilver 100km 2025 (17 hours) † |
| 126306 | Pizzinatto | Gustavo | M | São Paulo | BR | 1 | Valhöll Fin del Mundo by UTMB 131km 2025 (30 hours) |
| 100892 | Place | Sarah | F | GBR | GB | 16 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 127848 | Placide | Benoît | M | TOULOUSE | US | 1 | Grand Raid des Pyrénées - Tour de Cirques 123km 2025 (40 hours) |
| 118239 | Plaisted | Nick | M | Georgia | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 126190 | Plana | Nicole | F | N/A | ES | 1 | Transgrancanaria 125km 2025 (28 hours) |
| 127211 | Plançon | Luc | M | Pays de la Loire | FR | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 127346 | Plantefeve | Gaetan | M | oise | FR | 1 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 127636 | Plascencia | Alfredo | M | Jalisco | MX | 1 | Puerto Vallarta by UTMB 147km 2024 (35 hours) |
| 113905 | Plaster | Tracy | M | California | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 111172 | Platamone | Patrick | M | Ticino | CH | 2 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 115390 | Platcek | Chris | M | MN | US | 4 | Kettle Moraine 100M 2025 (30 hours) † |
| 101824 | Plate | Wes | M | WA | US | 64 | Cocodona 250M 2025 (125 hours) |
| 121564 | Platt | Daniel | M | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 114797 | Platt | Russ | M | Cheshire | GB | 4 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 109542 | plaut | alexandre | M | bouches du rhone | FR | 4 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 126535 | Pleintinger | Sebastian | M | Bavaria | DE | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 127053 | Pleynet | Martin | M | DC | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 127271 | Ploof | Jim | M | VT | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 102536 | Plourde | Julia | F | NH | US | 32 | Vermont 100M 2025 (30 hours) |
| 106996 | Pluess | Christian | M | Aargau | CH | 32 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 117593 | Plumb | Richard | M | AZ | US | 2 | Cocodona 250M 2025 (125 hours) |
| 125506 | Plummer | Barney | M | Cumbria | GB | 1 | Valleys Ultra (13) 180km 2025 (46.5 hours) |
| 119715 | PODOGORSKA | Sebastien | M | France | FR | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 124456 | poehlmann | robert | M | NC - NORTH CAROLINA | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 111655 | Poelzelbauer | Martina | F | Vienna | AT | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 117568 | Poer | Bobby | M | AL | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 113746 | Poetzl | Karl | M | TX | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 126068 | Poffenberger | Charlie | M | Virginia | US | 1 | Massanutten 100M 2025 (36 hours) |
| 110352 | Pogue | Luke | M | AZ | US | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 117726 | Pohl | Christian | M | Gloucestershire | GB | 2 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 113788 | Pohl | Jason | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 125847 | Pohler | Alayna | F | TX | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 117381 | POILANE | Jason | M | France | FR | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 127809 | Poirier | Sarah | F | ontario | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 102302 | Poirier | Sebastien | M | FRA | FR | 8 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 117981 | Pokorny | Vaclav | M | Czech Republic | CZ | 4 | Krakonosova Stovka 100km 2025 (22 hours) |
| 127432 | Poláček | Marian | M | Bratislava | SK | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 123230 | Polach | Marek | M | Czech Republic | CZ | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 108164 | Poland | Andrew | M | CO | US | 16 | Hardrock 100M 2025 (48 hours) † |
| 126750 | Poland | Matthew | M | New Jersey | US | 1 | Kettle Moraine 100M 2025 (30 hours) |
| 125828 | Poles | Benjamin | M | Québec | CA | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123660 | Polla | Aristide | M | 38094 | IT | 1 | SwissPeaks 360km 2025 (156 hours) |
| 102442 | Pollak | David | M | CO | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 124085 | Pollard | Jessica | F | NSW | AU | 1 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 126506 | Pollard | Katie | F | Colorado | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 113208 | Pollock | Jasper | M | OR | US | 4 | Waldo 100km 2025 (18 hours) † |
| 126621 | Poloskov | Aleksandr | M | Moscow | RU | 1 | Patagonia 100M 2025 (42 hours) |
| 124499 | Pomaranski | Andrea | F | MI | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 122105 | Ponce | Raul | M | CA | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 112165 | poncet | jerome | M | Or | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125592 | Pond | Colleen | F | MN | US | 1 | Superior 100M 2025 (38 hours) † |
| 126126 | Pons | Julien | M | Quebec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 125661 | PONS GUAL | BARTOLOME | M | ILLES BALEARS | ES | 1 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 120957 | Pontes | Murillo Henrique Ramos | M | SP | BR | 2 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 111900 | Pool | Robert | N | Oregon | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 102952 | Poole | Dawn | F | CA | US | 16 | Bear, The 100M 2025 (36 hours) † |
| 100888 | Poole | Michael | M | NC | US | 16 | Hardrock 100M 2025 (48 hours) † |
| 119865 | Pooley | Jason | M | East Sussex | GB | 2 | Thames Path 100M 2025 (30 hours) |
| 110682 | Pop | Adrian | M | Oregon | US | 16 | Moab 238M 2025 (108 hours) † |
| 108710 | Pope | Eric | M | NM | US | 8 | Crazy Mountain 100M 2025 (36 hours) † |
| 106999 | Pope | Jeremy | M | Ohio | US | 64 | Canal Corridor 100M 2025 (30 hours) † |
| 127359 | Pope | Shaun | M | NC | US | 1 | Hellbender 100M 2025 (40 hours) |
| 123765 | Pope | Stephen | M | Yorkshire | GB | 1 | Autumn 100M 2025 (28 hours) |
| 110074 | Popp | Adam | M | Colorado | US | 1 | Hennepin 100M 2025 (30 hours) |
| 119114 | Poppe | Samuel | M | Washington | US | 2 | Cascade Crest 100M 2025 (34 hours) |
| 124648 | Porche | Kyle | M | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 127191 | Porlier | Melody | F | Quebec | CA | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 126881 | Porter | Bryce | M | Ohio | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 127189 | Porter | Hannah | F | Fl | US | 1 | Mamba 100M 2024 (34 hours) |
| 121359 | Porter | Kevin | M | Colorado | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 124804 | Porter | Shawn | M | TX | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 125735 | Porth | Jonah | M | California | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 120323 | Portilla | Sara | F | TX | US | 2 | Brazos Bend 100M 2024 (32 hours) |
| 127351 | Portillo | Antonio | M | MD | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 123855 | Portlock | Natalie | F | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 100109 | Porto | Francisco | M | MG | BR | 2 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 123331 | Porwal | Rajesh | M | MP | IN | 2 | Cameron Ultra-Trail 100km 2025 (28 hours) |
| 104021 | Porzucek | Guillaume | M | FRA | FR | 8 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 104377 | Posey | Eddie | M | SC | US | 16 | No Business 100M 2025 (34 hours) |
| 102918 | Poskin | Brady | M | MO | US | 32 | Wasatch Front 100M 2025 (36 hours) † |
| 120069 | Poskin | Cody | M | Missouri | US | 2 | Cocodona 250M 2025 (125 hours) |
| 117538 | Pospisil | David | M | Czech Republic | CZ | 4 | Javornika 105km 2025 (24 hours) |
| 111349 | Postaski | Michael | M | ID | US | 8 | Beaverhead 100km 2025 (20 hours) |
| 125212 | Pothier | Craig | M | TX | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 108047 | Pothin | Shaun | M | TN | US | 8 | Cruel Jewel 106M 2025 (48 hours) † |
| 123221 | Potts | Benjamin | M | Hampshire | GB | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 115290 | Potts | Luke | M | Cheshire | GB | 4 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 126014 | Potts | Michael | M | FL | US | 1 | Pinhoti 100M 2025 (32 hours) |
| 103733 | Poulatov | Azam | M | NY | US | 8 | Bear, The 100M 2025 (36 hours) † |
| 126461 | Poulton | Christian | M | London | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 127837 | Pourchet | Martin | M | Aquitaine | FR | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 125482 | Pourmussa | Bianca | F | PA | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 116399 | Powell | Allison | F | Montana | US | 4 | Cocodona 250M 2025 (125 hours) |
| 122620 | Powell | Bryon | M | Colorado | US | 2 | Never Summer 100km 2025 (23 hours) |
| 116227 | Powell | Michael | M | Washington DC | US | 4 | Grindstone by UTMB 100M 2025 (36 hours) |
| 118789 | Powell | Steve | M | Victoria | AU | 4 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 127070 | Powell | Wayne | M | West Midlands | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 124224 | Power | John | M | Ontario | CA | 1 | Moab 238M 2025 (108 hours) † |
| 127792 | Power | Mitchell | M | VIC | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 127418 | Powers | Daniel | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 125813 | Powers | Grant | M | SC | US | 1 | Bighorn 100M 2025 (35 hours) |
| 116655 | Prach | Lisa | F | Zürich | CH | 4 | Mozart by UTMB 119km 2025 (23 hours) |
| 100575 | Pracht | Stefan | M | GBR | GB | 32 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 108297 | Prairie | Chris | M | TX | US | 16 | HOKA Bandera 100km 2025 (17 hours) |
| 114691 | Prat | Alexandre | M | Quebec | CA | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 122485 | Pratschner | Kia | F | CA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 117509 | Pratt | Anthony | M | ENGLAND | GB | 4 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 120222 | Pratt | Jefferey | M | SD | US | 2 | Bighorn 100M 2025 (35 hours) |
| 113302 | Predescu | Felix | M | AZ | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 101616 | Pregliasco | Jonatan | M | CHL | AR | 32 | Patagonia 110km 2025 (27 hours) |
| 126134 | Prekker | Montana | M | MN | US | 1 | Superior 100M 2025 (38 hours) † |
| 114472 | Prendeville | Paul | M | Ohio | US | 8 | Eastern States 100M 2025 (36 hours) |
| 118612 | Preskett | Mark | M | London | GB | 2 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 124959 | Pressley | Ashley | F | Indiana | US | 1 | Indiana 100M 2025 (30 hours) |
| 117851 | PRETAT | xavier | M | Haute-Garonne | US | 2 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 116155 | Prevost | Andy | M | WI | US | 2 | Indiana 100M 2025 (30 hours) |
| 115738 | Prezkuta | Jacob | M | CO | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 115474 | Price | Alex | M | TX | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 115746 | Price | Jeff | M | UT | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 104802 | Price | Joe | M | IN | US | 1 | Western States 100M 2025 (30 hours) † |
| 116721 | Price | Lewis | M | CO | US | 2 | Never Summer 100km 2025 (23 hours) |
| 115589 | Price | Will | M | Ohio | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 121193 | Priddey | Kelly | F | Queensland | AU | 2 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 120504 | Priddle | Charles | M | Ontario | CA | 2 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 110189 | Pride | Doug | M | IL | US | 16 | Thames Path 100M 2025 (30 hours) |
| 125131 | Prieboy | John | M | IL | US | 1 | Georgia Death Race 74M 2025 (24 hours) |
| 111685 | Prihodko | Andrey | M | NY | US | 8 | Cruel Jewel 106M 2025 (48 hours) † |
| 102522 | Primault | Cédric | M | FRA | FR | 32 | Istria by UTMB 110km 2025 (24 hours) |
| 120377 | Prinvale | Matthew | M | Washington | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 121594 | Prior | Darren | M | South Australia | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 116543 | Privette | Jordan | M | NC | US | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 117120 | Prochazka | Libor | M | Prague | CZ | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 115089 | Prochnow | Chase | M | OR | US | 4 | Hood Hundred 100M 2025 (34 hours) |
| 119702 | Proctor | Alex | M | Utah | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 125440 | Proctor | Andrew | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 111007 | Proctor | Charles | M | CA | US | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 121626 | Proehl | Sean | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124546 | Profitt | Jason | M | Ohio | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 100585 | Prohaska | Meghan | F | TN | US | 64 | Black Canyon 100km 2025 (17 hours) † |
| 117405 | Prosser | Derek | M | New York | US | 4 | Mohican 100M 2025 (32 hours) |
| 105174 | Prosser | Elizabeth | F | CA | US | 2 | Waldo 100km 2025 (18 hours) † |
| 117074 | Proyer | Benjamin | M | Bavaria | DE | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 117075 | Proyer | Boguslawa | F | Silesian | PL | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 118321 | Pruitt | Matt | M | Arkansas | US | 4 | Cruel Jewel 106M 2025 (48 hours) † |
| 124433 | Pruitt | Sam | F | AR | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 105662 | Pryor | Ian | M | CA | US | 8 | HURT 100M 2025 (36 hours) † |
| 100727 | Pryznyk | Don | M | AB | CA | 32 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 104580 | Przepiora | Tomasz | M | NJ | PL | 32 | Laurel Highlands 70.5M 2025 (20 hours) |
| 111254 | Przystaw | Maxim | M | Sachsen-Anhalt | DE | 8 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 107556 | Pucci | Michael | M | Georgia | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 111328 | Pudik | Elisabeth | F | Illinois | US | 8 | HURT 100M 2025 (36 hours) |
| 118640 | Pugh | Marc | M | FL | US | 2 | Long Haul 100M 2025 (30 hours) † |
| 125373 | Pujol Sanchez | Oleguer | M | Catalunya | ES | 1 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 109848 | Pulaski | Thomas | M | New York | US | 8 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 105208 | Pulley | Benjamin | M | OH | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 126866 | Pulliese | Juan Pablo | M | Santa Fe | AR | 1 | Patagonia 100M 2025 (42 hours) |
| 126479 | Pullin | Bryan | M | TN | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 123949 | Pumpelly | Christian | M | VA | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 114714 | Punt | Valentijn | M | North Holland | NL | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 109099 | Punter | Spencer | M | CA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 101809 | Purdy | Jill | F | CA | US | 8 | Mountain Lakes 100M 2025 (30 hours) † |
| 110407 | Puretz | Lauren | F | CO | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 109817 | Pursey | Debbie | F | CA | US | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126384 | Purtle | William ‘Sandy’ | M | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 113006 | Putelis | Mahting | M | Colorado | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 117902 | Puthoste | Julie | F | Hauts de France | FR | 4 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 112184 | Putney | Rod | M | WA | US | 8 | Canyons by UTMB 100M 2025 (35 hours) |
| 124528 | Putre | Brian | M | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 114072 | Putt | Steve | M | PA | US | 4 | Canal Corridor 100M 2025 (30 hours) |
| 112479 | Putta | Theja | M | Colorado | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 125073 | Puzanov | Ben | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 116175 | Pyrah | Orrin | M | MT | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 126434 | Pyzyk | TJ | M | DC | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 124630 | qian | chun | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 112520 | Qian | Kairong | M | California | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 107533 | qian | xue | F | California | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 104630 | Qin | Gang | M | CA | US | 128 | Quicksilver 100km 2025 (17 hours) † |
| 125526 | QIN | MINGHUI | M | ON | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 127922 | qin | yong | M | Shanghai | CN | 1 | DL 100 106km 2025 (26 hours) |
| 123919 | QIU | Tony HONGLIANG | M | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 127887 | Qiu | Xiaobin | M | Beijing | CN | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 117448 | Qu | Minwei | M | New York | US | 4 | Nike ACG Ultra-Trail Chongli 168km 2025 (48 hours) |
| 104771 | Quallen | Eric | M | PA | US | 8 | Bigfoot 206M 2025 (100 hours) † |
| 124578 | Qualls | Meredith | F | TN | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 125530 | Quarles | Denise | F | GA | US | 1 | Georgia Death Race 74M 2025 (24 hours) |
| 109359 | Quatromoni | Ben | M | Rhode Island | US | 8 | Worlds End 100km 2025 (19 hours) |
| 126439 | Quedado | Kimberly | F | WV | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 111454 | Quentin | de Beauvoir | M | France | FR | 4 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 121035 | Quentin | Marechal | M | Bourgogne | FR | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 126862 | Quere | Michael | N | France | FR | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 127024 | Quesnelle | Matthew | M | Quebec | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 126275 | Quick | Dan | M | OR | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 127793 | Quigley | Nikolai | M | CT | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 108363 | quilty | jenny | F | BC | CA | 4 | Fat Dog 120M 2025 (48 hours) † |
| 127188 | Quine | Geoff | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 118654 | Quinn | Adam | M | Queensland | AU | 4 | Zion 100km 2025 (19 hours) |
| 124359 | Quinn | Connor | M | CO | US | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 116695 | Quinn | Erin | F | NY | US | 4 | Bigfoot 206M 2025 (100 hours) † |
| 115331 | Quinn | Melissa | F | OR | US | 4 | Hennepin 100M 2025 (30 hours) † |
| 113108 | Quinn | Taylor | M | BC | CA | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 107785 | QUIRICO | SCOTT | M | OR | US | 16 | Beaverhead 100km 2025 (20 hours) |
| 117224 | Quiros | Alicia | F | CO | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 127037 | Quiroz | Grace | F | MD | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 126176 | Rabech | Thomas | M | Sjaelland | DK | 1 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 117158 | Raber | Chris | M | Ohio | US | 4 | Grindstone by UTMB 100M 2025 (36 hours) |
| 127913 | Rabeshko | David | M | WA | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 115667 | Rabo | Adam | M | CO | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 122143 | Raboen | Giorsio | M | Zuid-Holland | NL | 2 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 118553 | Rabuzzi | Patrick | M | CA | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 122574 | Racca | Ryan | M | CA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 116145 | Rachau | Tammy | F | PA | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 125480 | Rachman | Aji | M | DKI Jakarta | ID | 1 | Grand Raid des Pyrénées - Ultra 160km 2025 (48 hours) |
| 126094 | Rackley | Erica | F | AZ | US | 1 | Run Rabbit Run 100M 2025 (36 hours) † |
| 124491 | Rader | Austin | M | Kentucky | US | 1 | No Business 100M 2025 (34 hours) |
| 118006 | Radford | Matt | M | NC | US | 4 | Wasatch Front 100M 2025 (36 hours) † |
| 123419 | Radi | Gyula | M | ON | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 125001 | Radney | Paige | F | VT | US | 1 | Vermont 100M 2025 (30 hours) |
| 100990 | Rae | Carolyn | F | GBR | GB | 2 | Kerry Way Ultra 101km 2025 (20 hours) |
| 124182 | Rae | Leighton | M | ON | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 109254 | Rafalski | Doug | M | PA | US | 16 | Massanutten 100M 2025 (36 hours) |
| 115822 | Raff | Ryan | M | AZ | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 103040 | Raffo | Nico | M | CA | US | 16 | Pine to Palm 100M 2025 (34 hours) † |
| 109427 | Ragainis | Ivars | M | GA | US | 8 | Georgia Death Race 74M 2025 (24 hours) † |
| 125347 | Ragetlie | Enzo | M | Noord-Brabant | NL | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 113795 | Ragland | Blake | M | Texas | US | 4 | HURT 100M 2025 (36 hours) † |
| 102564 | Raguet-Schofield | Rob | M | CO | US | 16 | Hellbender 100M 2025 (40 hours) † |
| 127300 | Rahm | Max | M | Tirol | AT | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124701 | Rainbolt | Bradley | M | CO | US | 1 | Never Summer 100km 2025 (23 hours) |
| 126982 | Rainer | Manfred | M | Deutschland | DE | 1 | Taupo 100km 2025 (17 hours) |
| 127689 | Raineri | Christina | F | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 125069 | Raineri | Douglas | M | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 124047 | rainey | ian | M | Down | GB | 1 | Restonica Trail by UTMB - Ultra-Trail® di Corsica 110km 2025 (36 hours) |
| 105056 | Rains | Austin | M | WA | US | 64 | IMTUF 100M 2025 (36 hours) † |
| 123432 | RAISIRI | Nattawut | M | Rayong | TH | 1 | Mt Fuji 100M 2025 (46 hours) |
| 127204 | Rajaei | Nazila | F | California | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 124173 | Rajic | Boris | M | ON | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 112371 | Rajnowski | Levi | M | CO | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 126675 | Rakheja | Abhinav | M | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 127669 | Raley | Elizabeth | F | CO | US | 1 | Never Summer 100km 2025 (23 hours) |
| 124618 | Ralph | Aaron | M | Queensland | AU | 1 | Blackall 100km 2025 (18 hours) |
| 107167 | Ralph | Ian | M | Hampshire | GB | 4 | North Downs Way 100M 2025 (30 hours) |
| 103170 | Ralston | Kenneth | M | UT | US | 4 | Tahoe 202M 2025 (100 hours) † |
| 124314 | Ralston | Nathaniel | M | Idaho | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 111136 | Ramajo Farre | Ruben | M | Barcelona | ES | 8 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 107007 | Rambach | Whit | M | NV | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 117216 | Rambo | Aaron | M | TX | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 101380 | Ramdhan | Darren | M | NV | US | 16 | Wasatch Front 100M 2025 (36 hours) † |
| 113020 | Ramiller | Matt | M | Michigan | US | 8 | Burning River 100M 2025 (30 hours) |
| 106024 | Ramirez | Israel | M | CA | US | 128 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 108089 | Ramirez | Manuel | M | Mexico | MX | 2 | Bigfoot 206M 2025 (100 hours) † |
| 101772 | Ramirez | Robert | M | CA | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 122754 | Ramirez Rodriguez | Daniel Absalon | M | Mexico City | MX | 2 | Swiss Alps 100km 2025 (22 hours) |
| 127739 | rammana | kittipong | M | Bangkok | TH | 1 | Pong Yaeng Trail 160km 2025 (48 hours) |
| 103269 | Rammell | Jared | M | CO | US | 32 | Never Summer 100km 2025 (23 hours) |
| 110287 | Ramos | Jeff | M | CA | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 113637 | Ramos | Jose | M | California | US | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 101336 | Rampon | Jeremy | M | CA | US | 16 | Wasatch Front 100M 2025 (36 hours) † |
| 115713 | Ramponi | Alex | M | Texas | US | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 110584 | Ramras | Monique | F | OR | US | 4 | Hellbender 100M 2025 (40 hours) |
| 124311 | Ramteemal | Shane | M | Alberta | CA | 1 | Lost Soul Ultra 100M 2025 (33 hours) † |
| 124055 | Rana | Akhilesh | M | Jammu and Kashmir | IN | 1 | Malnad Ultra 100km 2024 (21 hours) |
| 116521 | Rana | Hem | M | North Yorkshire | GB | 4 | Lakeland 100M 2025 (40 hours) |
| 111110 | Ranalli | Jessica | F | Ontario | CA | 8 | Canadian Death Race 118km 2025 (24 hours) |
| 116244 | Randall | Brian | M | Oregon | US | 4 | Cascade Crest 100M 2025 (34 hours) |
| 115672 | randall | Daniel | M | Hampshire | GB | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125389 | Randall | Pete | M | East Sussex | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 120413 | Randrup | Kristina | F | WA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 121976 | Ranganathan | Vince | M | VA | US | 2 | Massanutten 100M 2025 (36 hours) † |
| 123868 | Rangdé | François | M | Pays de la Loire | FR | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 103211 | Rangel | Efren | M | CA | US | 16 | Wasatch Front 100M 2025 (36 hours) † |
| 124788 | Rankin | Russell | M | VA | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 124310 | Rankin | Travis | M | Pa | US | 1 | Worlds End 100km 2025 (19 hours) |
| 120685 | Rannou | Nicolas | M | Quebec | CA | 2 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 121679 | Ransom | Colton | M | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 119589 | Ranson | Holly | F | Queensland | AU | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 107009 | Rao | Shashwat | M | Himachal | IN | 16 | Malnad Ultra 100km 2024 (21 hours) |
| 113094 | Raphael | Austin | M | CA | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 125845 | Rapoport | Geoffrey | M | CO | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 107010 | Rashid | Terri | F | Arizona | US | 4 | Tunnel Hill 100M 2024 (30 hours) † |
| 114841 | Rask | Tatum | F | CO | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 127287 | Raskin | Katrina | F | California | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 116599 | Rasmussen | Nicole | F | UT | US | 2 | Wasatch Front 100M 2025 (36 hours) † |
| 126562 | Rasmussen | Per Egon | M | Hovedstaden | DK | 1 | Zugspitz 106km 2025 (25 hours) |
| 125415 | Rasmussen | Troy | M | NC | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 119862 | Rassokha | Hanna | F | Bavaria | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 105319 | Rastgoufard | Babak | M | MT | US | 1 | Western States 100M 2025 (30 hours) † |
| 126703 | Rath | Suzanne | F | Queensland | AU | 1 | Surf Coast Century 100km 2025 (17 hours) |
| 124908 | Ratica | Brian | M | PA | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 116560 | Ratsep | Mattis | M | Harju | EE | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 103232 | Rattanasriampaipong | Ronnakrit | M | TX | US | 8 | Pong Yaeng Trail 160km 2025 (48 hours) |
| 123691 | Ratté | Sébastien | M | Québec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 116072 | Rau | Jason | M | CA | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 121986 | Rauby | Brice | M | Québec | CA | 2 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 124022 | Rauchhaupt | Sven | M | Sachsen | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 104359 | Ravaglia | Mark | M | HI | US | 16 | HURT 100M 2025 (36 hours) † |
| 126716 | Raved | Sara | F | Wa | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 125461 | Ravenda | Gina | F | Québec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 124065 | Ravenscroft | Mark | M | London | GB | 1 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 119707 | Ravera | Claudia | F | italy | IT | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 107197 | Rawls | Jack | M | AL | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 101293 | Ray | Brandy | F | TX | US | 64 | Rocky Raccoon 100M 2025 (30 hours) |
| 122277 | Ray | Jonathan | M | MS | US | 2 | Pinhoti 100M 2025 (32 hours) † |
| 126098 | Ray | Thomas | M | Montana | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 122904 | Ray | Zoe | F | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 125943 | Raybon | Dominic | M | Texas | US | 1 | TransLantau Ultra Trail by UTMB 100km 2024 (28 hours) |
| 105024 | Rayburg | Casey | M | MD | US | 128 | Laurel Highlands 70.5M 2025 (20 hours) |
| 110348 | Raymond | Luke | M | Victoria | AU | 8 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 127393 | RAYMOND | Raphaël | M | France | FR | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 118936 | Raynaud | Flavien | M | Queensland | AU | 4 | Swiss Canyon Trail 111km 2025 (24 hours) |
| 123729 | Rayne | Ciara | F | Taranaki | NZ | 1 | Taupo 100km 2025 (17 hours) |
| 126272 | Rayner | Ben | M | Essex | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 123465 | Rayo | Steve | M | OH | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 126572 | Rayz | Mike | M | PA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 125197 | Razina | Irina | F | HI | US | 1 | HURT 100M 2025 (36 hours) † |
| 124991 | Razmara | Ashkaun | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 110270 | Razzoli | Maria | F | Minnesota | US | 16 | Hennepin 100M 2025 (30 hours) † |
| 120517 | Re | Gabriello | M | Colorado | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 122699 | Read | Andrew | M | VIC | AU | 2 | Buffalo Stampede 100km 2025 (23 hours) |
| 123826 | Read | Noah | M | CA | US | 1 | Leona Divide 100km 2025 (17 hours) |
| 111864 | Reader | Jordan | M | CA | US | 8 | Cascade Crest 100M 2025 (34 hours) |
| 101055 | Readinger | Andrew | M | TX | US | 4 | Angeles Crest 100M 2025 (36 hours) † |
| 115182 | Real | Sergio | M | Macau | MO | 2 | Hong Kong 100K 100km 2025 (23 hours) |
| 107444 | Reardon | Michael | M | North Carolina | US | 16 | Cocodona 250M 2025 (125 hours) |
| 117632 | Reardon | Travis | M | MA | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 121869 | Rebe | David | M | Western Cape | ZA | 2 | Karkloof 100M 2025 (36 hours) |
| 112204 | Rebolledo | Oscar | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 115656 | Reboton | Virgil | M | Negros Occidental | PH | 4 | Hardcore Ultra Trail (HUT) 100M 2025 (44 hours) |
| 118730 | Rebout | Romain | M | Pas de calais | FR | 4 | Swiss Canyon Trail 111km 2025 (24 hours) |
| 124071 | Reck | Lukas | M | Baselland | CH | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 120521 | Redden | Andrew | M | IL | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 126960 | Redding | Greg | M | IN | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 127953 | Reddy | Sadanand | M | California | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 115879 | Rediker | Michael | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 109618 | Redpath | Glen | M | NY | US | 8 | Tahoe 202M 2025 (100 hours) † |
| 110392 | Redpath | Kumiko | F | NY | US | 8 | Tahoe 202M 2025 (100 hours) † |
| 126114 | Redwine-Osorio | Guadalupe | F | Texas | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 103034 | Reed | Andy | M | AB | CA | 64 | Beaverhead 100km 2025 (20 hours) |
| 125988 | Reed | Marina | F | Ny | US | 1 | Vermont 100M 2025 (30 hours) |
| 125935 | Reed | Martin | M | Bristol | GB | 1 | Autumn 100M 2025 (28 hours) |
| 127867 | Reed | Nick | M | WI | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 104722 | Reed | Pam | F | WY | US | 4 | Bear, The 100M 2025 (36 hours) † |
| 111223 | Reed | Phil | M | Grand Cayman | KY | 4 | Lakeland 100M 2025 (40 hours) |
| 124259 | Reekie | Russell | M | Aberdeenshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 122486 | Rees | James | M | Auckland | NZ | 2 | Taupo 100km 2025 (17 hours) |
| 121781 | Reese | Andrew | M | Washington | US | 2 | Waldo 100km 2025 (18 hours) † |
| 104527 | Reese | Dani | F | OR | US | 32 | Pine to Palm 100M 2025 (34 hours) † |
| 115099 | reeve | john | M | hampshire | GB | 4 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 100606 | Reeves | Greg | M | AL | US | 32 | Hellbender 100M 2025 (40 hours) † |
| 112808 | Regalado | Cristina | F | Utah | US | 4 | Tarawera by UTMB 102km 2025 (17 hours) |
| 101102 | Regan | Kerry | F | UT | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 105551 | Regehr | Bentley | M | CA | US | 64 | Canyons by UTMB 104km 2025 (20 hours) |
| 104341 | Regelson | Dan | M | CO | US | 8 | Wasatch Front 100M 2025 (36 hours) † |
| 121620 | Regier | Brandon | M | AB | CA | 2 | Crazy Mountain 100M 2025 (36 hours) † |
| 125257 | Rehacek | Jakub | M | FL | US | 1 | Long Haul 100M 2025 (30 hours) |
| 124594 | REICH | CHRISTOPHER | M | SC | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 121597 | Reich | Wilhelm | M | Barcelona | ES | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 107537 | Reichel | Aubree | F | WA | US | 8 | Waldo 100km 2025 (18 hours) † |
| 115781 | Reichert | Barron | M | Alberta | CA | 4 | Canadian Death Race 118km 2025 (24 hours) |
| 105372 | Reichert | Bryan | M | OR | US | 64 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 127765 | Reichmuth | Kasey | M | Kentucky | US | 1 | No Business 100M 2025 (34 hours) |
| 124481 | Reid | Adam | M | KY | US | 1 | No Business 100M 2025 (34 hours) |
| 127316 | Reid | Alex | M | London | GB | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 123677 | REID | TYSON | M | ON | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 106668 | Reiff | Andrew | M | WA | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 116644 | Reimer | Luke | M | Colorado | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 109614 | Reimers | Christian | M | Carinthia | AT | 1 | Western States 100M 2025 (30 hours) † |
| 127202 | Reinholt | Abby | F | CO | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 126968 | Reintjes | Daniel | M | CA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 101533 | Reis | Wanderley | M | KS | US | 64 | Brazos Bend 100M 2024 (32 hours) |
| 124272 | Reislöhner | Jan | M | Bavaria | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 116247 | Reiss | Howard | M | California | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 116944 | Reiss | Marshall | M | CA | US | 4 | Pine to Palm 100M 2025 (34 hours) † |
| 126179 | Reissner | Skylor | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 123599 | Reitsma | Johan | M | Groningen | NL | 1 | Swiss Alps 100km 2025 (22 hours) |
| 108364 | Remenda | Joseph | M | Alberta | CA | 16 | Lost Soul Ultra 100km 2025 (21 hours) |
| 123801 | Remmers | James | M | NC | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123981 | Remmo | Abe | M | Sccotland | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 103077 | Ren | Dapeng | M | CHN | CN | 32 | Ninghai Ultra Trail 109km 2025 (24 hours) |
| 122128 | Ren | Laurent | M | Paris | FR | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 118748 | Ren | Xiaoxia | F | CA | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124715 | Ren | Xin | F | BC | CA | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 121856 | Renaud | Gerald | M | Auvergne | FR | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 113680 | Renn | Nathan | M | AZ | US | 4 | Zion 100km 2025 (19 hours) |
| 125187 | Renn | Robert | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 105601 | Renner | Dirk | M | OR | US | 64 | Crazy Mountain 100M 2025 (36 hours) † |
| 100408 | Rennick | Stephen | M | AUS | AU | 256 | Guzzler Ultra 100km 2025 (24 hours) |
| 110178 | Rentie | Marcus | M | CA | US | 8 | Leona Divide 100km 2025 (17 hours) |
| 127143 | repetti | benoit | M | MEURTHE ET MOSELLE | FR | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 119830 | Repko | Matthew | M | PA | US | 1 | Hellbender 100M 2025 (40 hours) † |
| 127159 | Repsjø | Petter | M | Slependen | NO | 1 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 100567 | Rescorla | Eric | M | CA | US | 16 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 103765 | Resplandy | Lucile | F | FRA | FR | 16 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 105537 | Ressl | Robert | M | CA | US | 32 | Waldo 100km 2025 (18 hours) |
| 125177 | Restrepo Coy | Jorge | M | Cundinamarca | CO | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 111188 | Retzlaff | Mark | M | OR | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 124143 | Reusser | Clayton | M | OK | US | 1 | Waldo 100km 2025 (18 hours) † |
| 100134 | Reuter | Steffen | M | DEU | DE | 16 | Thames Path 100M 2025 (30 hours) |
| 114968 | Revels | Blake | M | AL | US | 4 | Burning River 100M 2025 (30 hours) |
| 101610 | Revenis | Bradley | M | MD | US | 1 | Western States 100M 2025 (30 hours) † |
| 120102 | Reviello | Maria | F | Pennsylvania | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 120089 | Rey | Hadrien | M | Haut de Seine | FR | 2 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 120657 | Reyes | Nathan | M | California | US | 2 | Never Summer 100km 2025 (23 hours) |
| 110870 | Reyes | Rachel | F | IL | US | 4 | Hennepin 100M 2025 (30 hours) † |
| 119104 | Reyes | Rocky | M | California | US | 4 | San Diego 100M 2025 (32 hours) † |
| 126162 | Reynolds | Alec | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 124535 | Reynolds | Cuyler | M | QC | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 120741 | Reynolds | Donal | M | Ma | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 111928 | Reynolds | Jason | M | CT | US | 4 | West Highland Way 95M 2025 (30 hours) |
| 117643 | Reynolds | Monika | F | WA | US | 4 | Hood Hundred 100M 2025 (34 hours) |
| 120689 | Reynolds | William | M | Greater London | GB | 2 | Istria by UTMB 168km 2025 (46 hours) |
| 127507 | Reynosa | Bryan | M | Wisconsin | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 124790 | Rhea | Nicholas | M | NV | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 111501 | Rhind | Cullen | M | Auckland | NZ | 8 | Tarawera by UTMB 100M 2025 (36 hours) |
| 124337 | Rho | Jannette | F | IL | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 120611 | Rhoades | Casey | F | IN | US | 2 | Pinhoti 100M 2025 (32 hours) |
| 117300 | Rhodes | David | M | Colorado | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 124562 | Rhodes | Klaire | F | AK | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 111119 | Ribeiro | Adam | M | MA | US | 4 | Vermont 100km 2025 (17 hours) |
| 125982 | Ribeiro | Alexandro | M | Viana do Castelo | PT | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124638 | Ribeiro de Azevedo | Leonardo | M | RJ | BR | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 100248 | Ribu | Dan | M | QLD | AU | 16 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 125718 | Rica | Michael | M | Queensland | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 118080 | Riccardo | Craig | M | Oregon | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 120612 | Ricci | Laura | F | MA | US | 2 | No Business 100M 2025 (34 hours) |
| 115819 | Rice | Chris | M | NY | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 101919 | Rice | Darrin | M | NV | US | 256 | Rio Del Lago 100M 2025 (30 hours) |
| 123996 | Rice | Dave | M | Surrey | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 125229 | Rice | Gabriella | F | PA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 120889 | Rice | Grant | M | MA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123845 | Rice | Nicole | F | California | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 107015 | Rice | William | M | Wa | US | 32 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124238 | Rich | Jon | M | PA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 109081 | Rich | Kieran | M | Wa | AU | 16 | Tarawera by UTMB 100M 2025 (36 hours) |
| 126892 | Rich | Nate | M | Colorado | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 124132 | Richard | Alexis | M | Quebec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 125250 | Richard | Jean-Simon | M | Quebec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 103969 | Richard | Laura | F | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 125430 | Richard | Nicolas | M | Québec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 122824 | Richard | Thibault | M | VA | US | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 115520 | Richards | Aaron | M | Hawaii | US | 4 | HURT 100M 2025 (36 hours) † |
| 122041 | Richards | Joshua | M | MT | US | 2 | Beaverhead 100km 2025 (20 hours) |
| 115022 | Richardson | Brian | M | NY | US | 4 | Crazy Mountain 100M 2025 (36 hours) |
| 120649 | Richardson | Dale | M | West Yorkshire | GB | 2 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 103372 | Richardson | Doug | M | AUS | AU | 16 | Buffalo Stampede 100km 2025 (23 hours) |
| 101066 | Richardson | Erik | M | MI | US | 16 | Leadville Trail 100M 2025 (30 hours) |
| 115283 | Richardson | Joshua | M | PA | US | 4 | Massanutten 100M 2025 (36 hours) † |
| 127531 | Richardson | Nicholas | M | NM | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 117412 | Richardson | Nigel | M | Auckland | NZ | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 125030 | Richardson | Peggy | F | WV | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 117847 | Richardson | Thomas | M | MB | CA | 4 | San Diego 100M 2025 (32 hours) † |
| 121117 | Richey | James | M | Texas | US | 2 | Brazos Bend 100M 2024 (32 hours) |
| 122654 | Richman | Whitney | F | VA | US | 2 | C & O Canal 100M 2025 (30 hours) |
| 115600 | richmond | Amanda | F | Florida | US | 4 | Long Haul 100M 2025 (30 hours) |
| 127565 | Richmond | Sierra | F | MT | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 120269 | Richter | Abby | F | CO | US | 2 | Crazy Mountain 100M 2025 (36 hours) † |
| 119191 | Richter | Marvin | M | Germany | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 109901 | Rickard | Jamie | M | West Virginia | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 107784 | Rickenberg | Abram | M | IN | US | 8 | Burning River 100M 2025 (30 hours) |
| 116040 | Rickey | Branch | M | CA | US | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 109403 | Rickman | Hannah | F | UK | GB | 4 | TOR130 - Tot Dret 130km 2025 (44 hours) |
| 125911 | Ricondo Fernández | María | F | Cantabria | ES | 1 | Transgrancanaria 125km 2025 (28 hours) |
| 100578 | Ricoux | Jacques | M | FR | FR | 32 | Trail du Saint-Jacques by UTMB 130km 2025 (28 hours) |
| 123604 | Ridder | Brock | M | Ohio | US | 1 | Rabid Raccoon 100M 2025 (36 hours) |
| 102929 | Riddle | Stacie | F | CA | US | 2 | Bighorn 100M 2025 (35 hours) |
| 122282 | Ridgway | Kelly | F | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 126499 | Ridsdale | Mike | M | Wiltshire | US | 1 | South Downs Way 100M 2025 (30 hours) |
| 104573 | Riedeman | David | M | WI | US | 128 | Moab 238M 2025 (108 hours) † |
| 120484 | Rieder | Andreas | M | Tirol | AT | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 100801 | Riefenberg | Dan | M | AL | US | 128 | Hellbender 100M 2025 (40 hours) † |
| 123241 | Rients | Adam | M | Colorado | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 125242 | Riepl | Tracy | F | CA | US | 1 | Sean O'Brien 100km 2025 (17 hours) † |
| 113943 | Ries | Gregory | M | CA | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 113430 | Rigau | Pepe | M | Cataluña | ES | 4 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 115508 | Rigaud | Florent | M | QC | CA | 2 | Eastern States 100M 2025 (36 hours) |
| 127822 | RIGÉ | Adrien | M | Auvergne Rhône Alpes | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124133 | Riggs | Robby | M | TN | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 102034 | Rigodanza | Lorenzo | M | ITA | IT | 16 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 110383 | Riley | Christopher | M | SD | US | 8 | Arkansas Traveler 100M 2025 (30 hours) |
| 124307 | Riley | David | M | IL | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 112829 | Riley | Jadine | F | WA | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 116164 | Riley | Kody | M | CO | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 110219 | Riley | Thomas | M | Oregon | US | 16 | Waldo 100km 2025 (18 hours) † |
| 125312 | Rinaldi | Antonia | F | Italy | IT | 1 | Tuscany Crossing 103km 2025 (21 hours) |
| 127238 | Rinaldi | Chris | N | CA | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 122133 | Rinaldi | Stefano | M | Italia | US | 2 | Swiss Alps 100km 2025 (22 hours) |
| 107322 | Ring-Jarvi | Ross | M | Colorado | US | 4 | IMTUF 100M 2025 (36 hours) † |
| 126291 | Ringheiset | Karen | F | Ma | US | 1 | Vermont 100km 2025 (17 hours) |
| 101438 | Ringled | Kenneth | M | CA | US | 16 | Quicksilver 100km 2025 (17 hours) † |
| 127006 | Rinieri | Mattia | M | Hugo de grootkade 4-1 | NL | 1 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 123312 | Riordan | Connor | M | New York | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 105941 | Riordan | Gerard | M | AUS | AU | 1 | Western States 100M 2025 (30 hours) † |
| 110615 | RIOS PITA | Ezequiel | M | CABA | AR | 4 | Swiss Alps 100M 2025 (50 hours) |
| 124779 | Riou | Simon | M | Bouches du Rhône | FR | 1 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 127240 | Rioux | Zachary | M | Utah | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 105519 | Ripple | Nolan | M | CO | US | 16 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 112201 | Risser | Jon | M | CO | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 121480 | Rissmiller | David | M | WI | US | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 124358 | Ritch | Jeremy | M | Arizona | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 100302 | Ritchie | Joe | M | AL | US | 16 | Burning River 100M 2025 (30 hours) |
| 112091 | Ritchie | Steve | M | North Carolina | US | 8 | Massanutten 100M 2025 (36 hours) † |
| 112697 | Ritenour | Travis | M | PA | US | 8 | Eastern States 100M 2025 (36 hours) |
| 105214 | Ritschel | Brian | M | CA | US | 128 | San Diego 100M 2025 (32 hours) † |
| 126260 | Ritter | Bess | F | VT | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 120084 | Rittersdorf | PJ | M | MI | US | 2 | Mohican 100M 2025 (32 hours) |
| 126613 | Rivas | Jose | M | Zacatecas | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 108015 | Rivas del Valle | Allan | M | Chimaltenango | GT | 1 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 127042 | Rivera | Felipe | M | Santiago | CL | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 124913 | RIVERA | JOSE | M | PR | PR | 1 | Puerto Vallarta by UTMB 147km 2024 (35 hours) |
| 127493 | Rivera | Michael | M | TX | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 124475 | Rivero | Alejandro | M | São Paulo | BR | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 101175 | Rives | Rob | M | VT | US | 4 | Vermont 100M 2025 (30 hours) |
| 127916 | Rix | Ben | M | WA | AU | 1 | Surf Coast Century 100km 2025 (17 hours) |
| 102639 | Roach | Christopher | M | UT | US | 32 | Wasatch Front 100M 2025 (36 hours) † |
| 126944 | Roantree | Finn | M | Zurich | CH | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 109071 | Roark | Steve | M | Arizona | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 125712 | Robb | Daniel | M | Wales | GB | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 103385 | Robbins | Stephen | M | NC | US | 8 | Umstead 100M 2025 (30 hours) |
| 120620 | Robbins | Todd | M | California | US | 2 | Fat Dog 100km 2025 (24 hours) |
| 115069 | Robbins | Virginia (Ginny) | F | ID | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 107974 | Robert | Hajnal | M | HUNEDOARA | RO | 1 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 100309 | Roberto | Alescia | F | OH | US | 16 | Vermont 100km 2025 (17 hours) |
| 127389 | Roberts | Andy | M | KENT | GB | 1 | North Downs Way 100M 2025 (30 hours) |
| 111746 | Roberts | Anthony | M | GA | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 107877 | Roberts | Brady | M | Pennsylvania | US | 2 | C & O Canal 100M 2025 (30 hours) † |
| 125513 | Roberts | Chad | M | UT | US | 1 | Wasatch Front 100M 2025 (36 hours) |
| 116266 | Roberts | Chris | M | Texas | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 100869 | Roberts | Chris | M | MO | US | 1 | Hardrock 100M 2025 (48 hours) † |
| 100625 | Roberts | Christopher | M | AUS | AU | 128 | Guzzler Ultra 100km 2025 (24 hours) |
| 119679 | Roberts | Christopher | M | Queensland | AU | 2 | Guzzler Ultra 100km 2025 (24 hours) |
| 116542 | Roberts | David | M | WI | US | 4 | Angeles Crest 100M 2025 (36 hours) † |
| 113296 | Roberts | Drew | M | OR | US | 4 | Hood Hundred 100M 2025 (34 hours) |
| 111495 | Roberts | Hal | M | Yorkshire | GB | 4 | Hardwolds 80M 2024 (24 hours) |
| 120255 | Roberts | Iain | M | CA | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 104763 | Roberts | James | M | BMU | BM | 16 | Kettle Moraine 100M 2025 (30 hours) † |
| 123571 | Roberts | John | N | Flintshire | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 112471 | Roberts | Justin | M | QLD | AU | 8 | Blackall 100km 2025 (18 hours) |
| 117259 | Roberts | Kyle | M | CA | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 112655 | Roberts | Larry | M | In | US | 8 | Canyons by UTMB 100M 2025 (35 hours) |
| 111698 | Roberts | Matt | M | IN | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 112494 | Roberts | Michael | M | Arizona | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 127547 | Roberts | Tom | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 125358 | Robertson | Alex | M | South Yorkshire | GB | 1 | North Downs Way 100M 2025 (30 hours) |
| 106453 | Robertson | Alex | M | CO | US | 8 | IMTUF 100M 2025 (36 hours) † |
| 123633 | Robertson | Angus | M | Pennsylvania | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 116638 | Robertson | James | M | FL | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 110489 | Robertson | Mack | M | OR | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 125857 | Robertson | Marty | M | Alberta | CA | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 101666 | Robertson | Nicholas | M | NV | US | 16 | Hennepin 100M 2025 (30 hours) † |
| 107725 | Robertson | Riley | M | CA | US | 2 | HURT 100M 2025 (36 hours) † |
| 123884 | Robertson | Steven | M | NSW | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 117417 | Robertson | Steven | M | BC | CA | 4 | Canadian Death Race 118km 2025 (24 hours) |
| 126898 | Robey | Michael | M | Western Cape | ZA | 1 | Ultra-Trail Cape Town 100M 2024 (45 hours) |
| 121224 | Robin | Thomas | M | Hautes-Pyrénées | FR | 2 | Grand Raid des Pyrénées - Tour de Cirques 123km 2025 (40 hours) |
| 114218 | Robinson | Aaron | M | London | GB | 2 | North Downs Way 100M 2025 (30 hours) |
| 126853 | Robinson | Alice | F | DUBAI | AE | 1 | North Downs Way 100M 2025 (30 hours) |
| 121931 | Robinson | Andrew | M | North Lincolnshire | GB | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 101934 | Robinson | Brent | M | TX | US | 32 | Arkansas Traveler 100M 2025 (30 hours) |
| 125785 | Robinson | Gavin | M | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 123773 | Robinson | Glaxton | M | London | GB | 1 | Autumn 100M 2025 (28 hours) |
| 127150 | Robinson | James | M | MD | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 119023 | Robinson | Jeff | M | NSW | AU | 4 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 105379 | Robinson | Jon | M | WA | US | 32 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124379 | Robinson | Kelsey | F | MI | US | 1 | Sedona Canyons 125M 2025 (52 hours) |
| 125332 | Robinson | Lee | M | West Sussex | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 113095 | Robinson | Nigel | M | CA | US | 8 | Quicksilver 100km 2025 (17 hours) † |
| 125080 | Robison | Joshua | M | NH | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 127093 | Robling | Lloyd | M | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 103398 | Roca | Byron | M | GTM | GT | 64 | Bighorn 100M 2025 (35 hours) |
| 126040 | Rocha | Tyler | M | Washington | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 111605 | Roche | Chris | M | LA | US | 8 | IMTUF 100M 2025 (36 hours) † |
| 115465 | Roche | David | M | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 115116 | Rochlitz | Christian | M | Baden-Wuerttemberg | DE | 4 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 124072 | Rochon | Aryan | M | FL | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 118316 | Rockwood | Steven | M | CA | US | 4 | Waldo 100km 2025 (18 hours) † |
| 102996 | Rodakowski | John | M | WA | US | 16 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 127002 | RODARTE | KOSE | M | Berlin | US | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 125946 | Rodda | Matt | M | Victoria | AU | 1 | Surf Coast Century 100km 2025 (17 hours) |
| 124539 | Rodgers | Matthew | M | Colorado | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 125616 | Rodney | Travis | M | AB | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 124021 | Rodrigues | Alex | M | São Paulo | BR | 1 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 127651 | Rodrigues | Diego | M | SP | BR | 1 | Patagonia 110km 2025 (27 hours) |
| 103744 | Rodriguez | Carlos | M | MA | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 117609 | Rodriguez | Francisco | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 120549 | Rodriguez | Gustavo | M | TX | US | 2 | Dinosaur Valley 100M 2024 (35 hours) † |
| 107448 | Rodriguez | Jean-Francois | M | Occitanie | FR | 16 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 121475 | Rodriguez | Miguel | M | CA | US | 2 | Sean O'Brien 100km 2025 (17 hours) † |
| 123057 | Rodríguez | Tony | M | México | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 120518 | Rodriguez Barragan | Hector | M | México | MX | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 115860 | Rodriguez Gomez | Javier | M | Barcelona | ES | 2 | Transgrancanaria 125km 2025 (28 hours) |
| 125934 | Rodriguez Jiménez | Francisco | M | Murcia | US | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 117769 | Roeder | Adam | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 127253 | Roeder | John | M | NC | US | 1 | Hellbender 100M 2025 (40 hours) † |
| 123192 | Roedhammer | Martin | M | BS | CH | 2 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 127083 | Roemmich | Levi | M | ND | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 100637 | Roerig | Hans-Martin | M | DEU | DE | 16 | Ultra Trail Vipava Valley 165km 2025 (46 hours) |
| 124478 | Roff | Graham | M | CA | US | 1 | San Diego 100M 2025 (32 hours) † |
| 125564 | Rogall | LC | F | VA | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 125050 | Rogan | Claire | F | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) |
| 125708 | Rogers | Christopher | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 112103 | Rogers | Gunnar | M | TX | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 126965 | Rogers | Jon | M | NM | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 114388 | Rogers | Joshua | M | TN | US | 2 | Cocodona 250M 2025 (125 hours) |
| 114410 | Rogers | Michael | M | Quebec | CA | 2 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 125060 | Rogers | Philip | M | Ohio | US | 1 | No Business 100M 2025 (34 hours) |
| 113261 | Rogers | Sara | F | WI | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 110739 | Rogers | Shawn | M | New Mexico | US | 2 | Sedona Canyons 125M 2025 (52 hours) |
| 115139 | Rogers | Vince | M | MI | US | 4 | Laurel Highlands 70.5M 2025 (20 hours) |
| 124722 | ROGGENKAMP | LEE | M | Colorado | US | 1 | Bighorn 100M 2025 (35 hours) |
| 126464 | Roggow | Braden | M | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) † |
| 122386 | Rogosch | Dorothee | F | Hesse | DE | 2 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 105790 | Rohart | Ludwig | M | FRA | FR | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 115509 | Rohnacher | Eric | M | VA | US | 4 | IMTUF 100M 2025 (36 hours) † |
| 124671 | Rohr | Hardy | M | Zürich | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 125638 | Roith | Matthias | M | Bavaria | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 109422 | Roivainen | Juha | M | Not Specified | FI | 4 | Swiss Alps 100M 2025 (50 hours) |
| 127695 | Rojas | Fernando | M | Región Metropolitana de Santiago | CL | 1 | Vulcano Ultra Trail 100km 2024 (24 hours) |
| 127120 | Rojas | Omar | M | CA | US | 1 | Leona Divide 100M 2025 (33 hours) † |
| 121423 | ROLAND | Romain | M | Brabant Wallon | BE | 2 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 115012 | Roldan | Joseph | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 126334 | Roldan | Martin | M | QC | CA | 1 | Cocodona 250M 2025 (125 hours) |
| 124421 | Rolek | Anastasia | F | CO | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 100193 | Rolfe | Helen | F | AUS | AU | 4 | Blackall 100km 2025 (18 hours) |
| 111873 | Rolim | Pedro | M | Minas Gerais | BR | 8 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 114595 | Rolinec | Jozef | M | Slovakia | SK | 8 | Javornika 105km 2025 (24 hours) |
| 125102 | Rolle | Jeremy | M | BC | CA | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 111346 | Rollins | Josh | M | VT | US | 2 | Eastern States 100M 2025 (36 hours) |
| 103300 | Rollins | Laura | F | NC | US | 1 | Western States 100M 2025 (30 hours) † |
| 103359 | Rollins | Mark | M | NC | US | 128 | Pinhoti 100M 2025 (32 hours) † |
| 117529 | Rolls | Ian | M | TX | US | 2 | HOKA Bandera 100km 2025 (17 hours) |
| 110093 | Rom | Zoë | F | CO | US | 8 | Run Rabbit Run 100M 2025 (36 hours) † |
| 124222 | Romagnoli | Karen | F | California | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 120599 | Roman | Chris | M | Fl | US | 2 | Brazil 135M 2025 (60 hours) |
| 113720 | Roman | Dina | F | Limburg | BE | 8 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 107911 | Romanato | Leonardo | M | Bologna | IT | 16 | Gran Trail Courmayeur 100km 2025 (28 hours) |
| 120529 | Romani | Ange | M | Corse-du-Sud | FR | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 127986 | Romano | Alexa | F | CA | US | 1 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 124937 | Romano | Craig | M | Wa | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 127666 | Romans | Cassidy | F | AL | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 125414 | Romero | Esteban | M | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 123894 | Romero | Evan | M | California | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 117815 | Romero | Jared | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 126478 | Romero | Manuel | M | NV | US | 1 | Zion 100M 2025 (36 hours) † |
| 103258 | Romero | Ruperto | M | CA | US | 16 | Angeles Crest 100M 2025 (36 hours) † |
| 103236 | Romero | Ted | M | CO | US | 256 | Run Rabbit Run 100M 2025 (36 hours) |
| 126926 | ROMERO RAMOS | NORMA | F | Baja California | MX | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 127569 | Roncato | Alessandro | N | Italy | IT | 1 | Tuscany Crossing 160km 2025 (35 hours) |
| 102525 | Roncoroni | Luca | M | NOR | NO | 16 | Swiss Alps 100M 2025 (50 hours) |
| 126203 | Rondeau | Cody | M | British Columbia | CA | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 126945 | Rondini | Gabriele | M | Italy | IT | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 111920 | Rondorf | Sara | F | MN | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 126503 | RONGIER | Matthieu | M | RHONE | FR | 1 | Grand Raid Ventoux by UTMB 124km 2025 (30 hours) |
| 122859 | Ronimoiss | Andris | M | Riga | LV | 2 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 120873 | Ronk | Tyler | M | WI | US | 2 | Bighorn 100M 2025 (35 hours) |
| 125815 | ROOK | BEC | F | Queensland | AU | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 112947 | Rooke | Greg | M | Massachusetts | US | 8 | Vermont 100M 2025 (30 hours) |
| 124417 | Rooks | Jonathan | M | OR | US | 1 | Zion 100km 2025 (19 hours) |
| 110164 | Rooney | Kyle | M | MN | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 102896 | Roop | Alexa | F | CO | US | 16 | High Lonesome 100M 2025 (37 hours) |
| 126285 | Roppovalente | Laura | F | British Columbia | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 119674 | ROSA | ALAN | M | CT | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 127843 | Rosa | Leonardo | M | São Paulo | BR | 1 | Brazil 100M 2025 (40 hours) |
| 125841 | Rosales | Alejandro | M | Montana | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 117234 | Rosales | Jesse | M | CO | US | 2 | Run Rabbit Run 100M 2025 (36 hours) † |
| 108400 | Rose | Casey | M | Montana | US | 16 | Bigfoot 206M 2025 (100 hours) † |
| 122401 | Rose | Emily | F | ME | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 110590 | Rose | Eric | M | Wi | US | 4 | Kettle Moraine 100M 2025 (30 hours) † |
| 121090 | Rose | Kate | F | Colorado | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 127603 | Rose | Kristen | F | ON | CA | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 113961 | Rose | Michael | M | TX | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 108901 | Rose | Rebekah | F | UT | US | 16 | Bear, The 100M 2025 (36 hours) |
| 121164 | Rose | Tyler | M | CA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 118297 | Rosebaugh | Stephanie | F | AZ | US | 2 | Tahoe 202M 2025 (100 hours) † |
| 127012 | Rosen | Mark | M | Minnesota | US | 1 | Indiana 100M 2025 (30 hours) |
| 113452 | Rosen | Matt | M | Minnesota | US | 8 | Indiana 100M 2025 (30 hours) |
| 123864 | Rosenberger | Hans | M | Bayern | DE | 1 | Swiss Alps 100M 2025 (50 hours) |
| 110522 | Rosenblad | Peter | M | TN | US | 8 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 123214 | Rosenblatt | Connor | M | California | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 126116 | Rosintoski | Bradley | M | CA | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 118258 | Rosol | Chris | M | MA | US | 4 | Vermont 100M 2025 (30 hours) |
| 120458 | Ross | Corey | M | New Brunswick | CA | 2 | Istria by UTMB 110km 2025 (24 hours) |
| 109234 | Ross | Crystal | F | MA | US | 8 | Umstead 100M 2025 (30 hours) |
| 125455 | Ross | Doug | M | TN | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 117812 | Ross | Kyle | M | AB | CA | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 124488 | Ross | Nicole | F | New Brunswick | CA | 1 | Istria by UTMB 110km 2025 (24 hours) |
| 124438 | Ross | Patrick | M | Co | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 113670 | Ross | Stuart | M | Aberdeenshire | GB | 8 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 103813 | Ross | William | M | WV | US | 16 | High Lonesome 100M 2025 (37 hours) |
| 123737 | Rossi | Alexandra | F | Texas | US | 1 | Leona Divide 100km 2025 (17 hours) |
| 125823 | Rossi | Caitlin | F | CT | US | 1 | Vermont 100M 2025 (30 hours) |
| 127270 | Rossi | William | M | MA | US | 1 | Vermont 100M 2025 (30 hours) |
| 118247 | Rossman | Jake | M | MN | US | 4 | Superior 100M 2025 (38 hours) † |
| 113476 | Rostagno | Alessandro | M | Italy | US | 4 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 125738 | Rostoni | Scott | M | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 118469 | Roth | Chris | M | TX | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 122451 | Roth | John | M | Tennessee | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 120934 | Rothlauf | Jared | M | Texas | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 116472 | Rotow | Katherine | F | OR | US | 4 | Fat Dog 100km 2025 (24 hours) |
| 127649 | Rott | Adrian | M | Bavaria | DE | 1 | Swiss Alps 100km 2025 (22 hours) |
| 127028 | Rottiers | Jacob | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 101225 | Rotundo | Cesare | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 124731 | Rouches | Christine | F | OR | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 105615 | Roudebush | Bob | M | IN | US | 8 | Cascade Crest 100M 2025 (34 hours) |
| 120989 | Roulson | Nathan | M | Essex | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 100689 | Rounds | Heidi | F | CA | US | 2 | Waldo 100km 2025 (18 hours) † |
| 120945 | Rourke | Kara | F | TN | US | 2 | No Business 100M 2025 (34 hours) |
| 111323 | Rouse | Courtney | F | TX | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 114364 | Rouse | Josh | M | MN | US | 8 | Superior 100M 2025 (38 hours) † |
| 111316 | ROUSSE | Arnaud | M | France | FR | 4 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 126481 | Routier | Fabien | M | France | FR | 1 | Tuscany Crossing 160km 2025 (35 hours) |
| 114061 | Rouveyrol | Justine | F | Rhône | FR | 4 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 126856 | Roux | Michel | M | Bas-Rhin | FR | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 125475 | Rouxel | Francois Xavier (FX) | M | MD | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 104045 | Rowbury | Steve | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 118002 | Rowe | Kevin | M | Utah | US | 4 | Bear, The 100M 2025 (36 hours) † |
| 108495 | Rowlands | Gareth | M | Sussex | GB | 16 | Lakeland 100M 2025 (40 hours) |
| 126161 | Rowlands | Michael | M | Montana | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 127081 | Rowledge | Adam | M | Kent | GB | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 121182 | Rowling | Sheree | F | Queensland | AU | 2 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 104036 | Rowthorn | Jeff | M | ON | CA | 2 | Hennepin 100M 2025 (30 hours) † |
| 126582 | Roxas | Benjen | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 126910 | Roy | Alison | F | NH | US | 1 | Vermont 100M 2025 (30 hours) |
| 101829 | Roy | Guillaume | M | QC | CA | 64 | Javelina Jundred 100M 2025 (30 hours) † |
| 124291 | Roy | Kevin | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 111999 | Roy | Michael | M | MO | US | 1 | Western States 100M 2025 (30 hours) † |
| 125042 | Roy | Scott | M | VT | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 111544 | Royer | Adrien | M | MI | US | 8 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 120011 | Royer | Catherine | F | Québec | CA | 2 | Quebec Mega Trail 135km 2025 (32 hours) |
| 124690 | Royse | Dave | M | Surrey | GB | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 116083 | Rubenstein | Henry | M | UItah | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 100645 | Rubin | Jacob | M | CA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 100879 | Rubinstein | Scott | M | CO | US | 128 | Run Rabbit Run 100M 2025 (36 hours) |
| 116865 | Rubio | Lorena | F | CA | US | 4 | Angeles Crest 100M 2025 (36 hours) † |
| 122830 | Rubio MacWright | Carolina | F | New Jersey | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127009 | Ruch | Dan | M | UT | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 125543 | Rudd | Kevin | M | PA | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 117471 | Ruddick | Gemma | F | ACT | AU | 2 | Transjeju by UTMB 107km 2025 (25 hours) |
| 127910 | Rudnick | Payton | M | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) |
| 126437 | Rudolph | Jayne | F | London | GB | 1 | Autumn 100M 2025 (28 hours) |
| 112053 | Rueb | Elliot | M | MI | US | 4 | Moab 238M 2025 (108 hours) † |
| 114434 | Rueda | Santos Gabriel | M | Rio Negro | AR | 4 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 112418 | Ruemker | John | M | NC | US | 2 | Umstead 100M 2025 (30 hours) |
| 126521 | Ruf | Michael | M | CA | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 119976 | Ruff | Josh | M | Ontario | CA | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 124462 | Ruffini | Jared | M | Michigan | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 124185 | Ruggeri | Bryan | M | NY | US | 1 | Twisted Branch 100km 2025 (20 hours) |
| 124806 | Ruhland | Pamela | F | IA | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 117309 | Ruhstrat | Steven | M | Lower Saxony | DE | 4 | Zugspitz 106km 2025 (25 hours) |
| 115573 | Ruillé Jezequel | Guillaume | M | Pyrénées Orientales | US | 1 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 125210 | Ruiz | Diego | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 106204 | Ruiz | Jeffrey | M | MI | US | 4 | Tunnel Hill 100M 2024 (30 hours) † |
| 127770 | Ruiz | Jonathan L | M | PA | US | 1 | Eastern States 100M 2025 (36 hours) |
| 123939 | Ruiz-Smith | Niall | M | East Sussex | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 120621 | Rumenovich | Arianna | F | BC | CA | 2 | Bigfoot 206M 2025 (100 hours) † |
| 126497 | Runac | Justin | M | SC | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 102614 | Runions | Neil | M | MN | US | 16 | Bighorn 100M 2025 (35 hours) |
| 108709 | Rupe | Jason | M | Ohio | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 123659 | RUPERT | ARNAUD | M | TAHITI | PF | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124123 | Rusch | Patrick | M | WI | US | 1 | Mamba 100M 2024 (34 hours) † |
| 126777 | Rush | Marlon | M | Hampshire | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 108160 | Rushforth | William | M | California | US | 8 | No Business 100M 2025 (34 hours) |
| 124321 | Rushton | Andrew | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 115588 | Rusiecki | Amy | F | MA | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 126642 | Russell | Adam | M | PA | US | 1 | Worlds End 100km 2025 (19 hours) |
| 121988 | Russell | Anne-Marie | F | Missouri | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 124703 | Russell | Emory | M | GA | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 127221 | Russell | Jake | M | MS | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 125004 | Russell | Kim | F | SC | US | 1 | Cruel Jewel 106M 2025 (48 hours) † |
| 112950 | Russell | Zachary | M | CO | US | 8 | IMTUF 100M 2025 (36 hours) † |
| 113883 | RUSSIER | Fabien | M | Rhône | FR | 8 | Swiss Alps 100km 2025 (22 hours) |
| 116335 | Russo | Christopher | M | IN | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 116547 | Russo | Micaela | F | Oregon | US | 4 | Waldo 100km 2025 (18 hours) † |
| 116549 | Russp | Jaclyn | F | Pa | US | 2 | Rabid Raccoon 100M 2025 (36 hours) |
| 123561 | Ruter | Brian | M | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 125463 | Ruth | Brandon | M | CA | US | 1 | Zion 100km 2025 (19 hours) |
| 103111 | Ruthenbeck | Andrew | M | NV | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 108670 | Ruthenbeck | Anne | F | NV | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 101063 | Rutherford | Bret | M | NY | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 115325 | Rutowski | Josh | M | IL | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 107228 | Rutter | Helen | F | OH | US | 16 | Tunnel Hill 100M 2024 (30 hours) † |
| 124961 | Ruzza | Marta | F | Veneto | IT | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 104874 | Ruzza | Stefano | M | ITA | IT | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 116318 | Ryabets | Anastasiya | F | CA | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 123876 | Ryan | Ariel | F | MI | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 123928 | Ryan | Clete | M | VIC | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 109091 | Ryan | Dominique | F | Buderim | AU | 2 | Blackall 100km 2025 (18 hours) |
| 102054 | Ryan | Emily | F | DC | US | 4 | Hennepin 100M 2025 (30 hours) † |
| 125206 | Ryan | Hugh | M | WA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 123383 | Ryan | Jamaal | M | CA | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 101669 | Ryan | Jim | M | WA | US | 128 | Cascade Crest 100M 2025 (34 hours) |
| 115382 | Ryan | Luke | M | Victoria | AU | 4 | Surf Coast Century 100km 2025 (17 hours) |
| 126342 | Ryan | Madeleine | F | New Hampshire | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 123276 | Ryan | Matt | M | Oxfordshire | GB | 2 | Ninghai Ultra Trail 109km 2025 (24 hours) |
| 105580 | Ryan | Michelle | F | Utah | US | 1 | Western States 100M 2025 (30 hours) † |
| 108550 | Ryan | Tamatha | F | Hampshire | GB | 4 | Lakeland 100M 2025 (40 hours) |
| 127472 | Rychly | Catherine | F | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 123097 | Rycroft | Simon | M | North Yorkshire | GB | 2 | Lakeland 100M 2025 (40 hours) |
| 115809 | Rydman | Jacob | M | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 111053 | Ryerson | Holly | F | California | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 121171 | Rylance | Adam | M | Colorado | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 124284 | Rylyakov | Alexander | M | New York | US | 1 | Vermont 100km 2025 (17 hours) |
| 127919 | RYOHEI | SATO | M | Tokyo | JP | 1 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 105427 | Ryoji | Matsui | M | JPN | JP | 16 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 110184 | Rypinski | Tatiana | F | TX | US | 1 | Western States 100M 2025 (30 hours) † |
| 124336 | Ryšavý | David | M | Czech Republic | CZ | 1 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 124656 | Rytir | Ivo | M | BC | CA | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 105163 | Saarbach | Jacques | M | FRA | FR | 4 | Black Canyon 100km 2025 (17 hours) † |
| 126372 | Saari | Trent | M | Minnesota | US | 1 | Superior 100M 2025 (38 hours) † |
| 116999 | Saavedra | Monica | F | California | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126553 | Saayman | Bartlomeus | M | Western Cape | ZA | 1 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 125612 | Sabinin | Valentino | M | BC | CA | 1 | Moab 238M 2025 (108 hours) |
| 120298 | Sachdeva | Parvinder | M | Ontario | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 113888 | Sachs | Lindsey | F | CO | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 106209 | Sachse | Patrick | M | PA | US | 8 | Massanutten 100M 2025 (36 hours) † |
| 125555 | Sadorf | Daniela | F | CA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 125595 | Sadovnikova | Yulia | F | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 104609 | Saenger | David | M | OR | US | 1 | Western States 100M 2025 (30 hours) † |
| 113623 | Saez | Ricky | M | Scotland | GB | 4 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 126517 | Sage | Michael | M | Massachusetts | US | 1 | Vermont 100M 2025 (30 hours) |
| 118054 | Sage | Rachael | F | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 127625 | Sagon | Angie | F | Georgia | US | 1 | Dinosaur Valley 100km 2024 (22 hours) † |
| 107025 | Sahni | Vishal | M | CA | US | 32 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125725 | Sailor | Tori | F | Utah | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 112499 | Sainaba | Nadarsha | M | CA | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 112136 | Sainio | Jaska | M | Uusimaa | FI | 8 | Nuts Ylläs Pallas 327km 2025 (100 hours) |
| 127816 | Saintsbury | Mitchel | M | Qld | AU | 1 | Blackall 100km 2025 (18 hours) |
| 122267 | Saito | Masahiro | M | Miyagi-Pref | JP | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 123224 | Sakai | Seigo | M | saitama | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 104624 | Sakai | Takashi | M | Kanagawa | JP | 32 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 115649 | Sakamoto | Kei | M | Tokyo | JP | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 122548 | Sakamoto | Yoshinori | M | Hokkaido | JP | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 115309 | Saker | Luke | M | ENG | GB | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 122174 | Sakkas | Christos | M | Attiki | GR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 126847 | sakurada | kazushi | M | iwate | JP | 1 | Lake Biwa 100M 2025 (52 hours) |
| 104516 | Sakurai | Yoichiro | M | JPN | JP | 64 | Cascade Crest 100M 2025 (34 hours) |
| 125925 | Sala | Marco | M | MB | IT | 1 | Morenic Trail 119km 2025 (22 hours) |
| 117581 | salas | cesar | M | ca | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 105318 | Salazar | Becky | F | IL | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 127245 | Saldanha | Ryan | M | Nevada | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 125721 | Salinas | Jonathan | M | UT | US | 1 | Zion 100M 2025 (36 hours) † |
| 121954 | Saliou | Matthieu | M | MONTREAL | CA | 2 | Quebec Mega Trail 135km 2025 (32 hours) |
| 127413 | Salisbury | JJ | F | FL | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 125849 | Sall | Emily | F | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 127356 | Salmon | Alister | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 120212 | Salmon | DJ | M | AZ | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 122858 | Salmon | Sean | M | NJ | US | 2 | Grindstone by UTMB 100M 2025 (36 hours) |
| 103038 | Salt | Adela | F | AB | CA | 8 | Canadian Death Race 118km 2025 (24 hours) |
| 111413 | Salto | Guillermo | M | Buenos Aires | AR | 4 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 113675 | Salvaro | Martino | M | Trentino Alto Adige | IT | 8 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 104111 | Salvesen | Greg | M | NM | US | 1 | Western States 100M 2025 (30 hours) † |
| 121691 | Salvetti | Carlo | M | Lombardia | IT | 2 | Tuscany Crossing 103km 2025 (21 hours) |
| 115266 | Salwey | Christopher | M | Sweden | SE | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 104853 | Salyer | Chad | M | TX | US | 16 | Cocodona 250M 2025 (125 hours) |
| 116548 | Samaha | Jacques | M | Pennsylvania | US | 2 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 125137 | Samayoa | Raul | M | Fco morazan | HN | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 105959 | Sambommatsu | Chika | F | JPN | JP | 32 | Lake Biwa 100M 2025 (52 hours) |
| 115356 | Sambommatsu | Norio | M | Kanagawa | JP | 2 | OSJ Ontake 100M 2025 (24 hours) |
| 106183 | Sammur | Wael | M | MO | US | 2 | Hennepin 100M 2025 (30 hours) |
| 101732 | Samoylov | Vasily | M | CA | US | 128 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 121508 | Sampson | Patricia | F | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 126338 | Sams | Josh | M | MN | US | 1 | Superior 100M 2025 (38 hours) † |
| 114082 | Samuelson | Peter | M | CO | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 118236 | Sanada | Mizuki | M | Nagano | JP | 4 | Aso Volcano Trail 115km 2025 (28 hours) |
| 126643 | Sanborn | Bill | M | FL | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 114455 | Sanchez | Adam | M | WI | US | 8 | Kettle Moraine 100M 2025 (30 hours) † |
| 124447 | Sanchez | Claudia | F | Tamaulipas | MX | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 123005 | Sanchez | Dani | F | Texas | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 127369 | Sanchez | Emilio | M | CA | US | 1 | Leona Divide 100M 2025 (33 hours) † |
| 125068 | Sanchez | Jhon Alexander | M | South Carolina | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 114614 | Sanchez | Ramiro | M | Valle | CO | 4 | Leona Divide 100M 2025 (33 hours) † |
| 103245 | Sanchez | Ray | M | CA | US | 16 | Bigfoot 206M 2025 (100 hours) † |
| 103573 | Sanchez | Rony | M | GUATEMALA | GT | 32 | Angeles Crest 100M 2025 (36 hours) † |
| 125164 | Sanchez Jr | Moises | M | California | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 120614 | SANCHEZ RAMO | ROGELIO | M | Madrid | ES | 2 | Gran Trail Peñalara 110km 2025 (25 hours) |
| 114734 | Sandefur | Christopher | M | MO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 119422 | Sander | Mark | M | Tyne &Wear | GB | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 127572 | Sanders | Evan | M | OH | US | 1 | Burning River 100M 2025 (30 hours) |
| 120990 | Sanders | Mitch | M | CA | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 107915 | Sanderson | Janet | F | Rhode island | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126889 | Sandlin | Matt | M | IN | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 127640 | Sandoval | Fela | F | Texas | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 124164 | Sandoval | Matthew | M | Colorado | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 116618 | Sandoval | Noah | M | CO | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 119639 | Sandoval | Simon | M | BC | CA | 2 | Hardrock 100M 2025 (48 hours) |
| 126388 | Sandoval | Vanessa | F | oregon | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 122059 | Sands | Colleen | F | Massachusetts | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) |
| 112364 | Sanguanpiyapand | Pylin Jane | F | Bangkok | TH | 8 | TransLantau Ultra Trail by UTMB 100km 2024 (28 hours) |
| 107029 | Santer | Johann Peter | M | Hong Kong | HK | 4 | Hong Kong 100K 100km 2025 (23 hours) |
| 124368 | Santiago | Joseph | M | CO | US | 1 | Never Summer 100km 2025 (23 hours) |
| 109484 | SANTIAGO NAVARRO | Jose Luis | M | Madrid | ES | 4 | Gran Trail Peñalara 110km 2025 (25 hours) |
| 109782 | Santillan | Don Antonio Marcelo | M | Benguet | PH | 2 | Pulag Ultra Trail (PUT) 132km 2025 (40 hours) |
| 108664 | Santillana | Leonardo | M | NV | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 101696 | Santilli | Sara | F | HI | US | 64 | Cuyamaca 100km 2025 (17 hours) † |
| 125222 | Santoro | Stephen | M | CA | US | 1 | Nuts Ylläs Pallas 100km 2025 (22 hours) |
| 124633 | Santos | Adrian | M | TX | US | 1 | Bighorn 100M 2025 (35 hours) |
| 105763 | Santos | Alejandra | F | CA | US | 64 | Cuyamaca 100km 2025 (17 hours) † |
| 117968 | Santos | Brianna | F | CA | US | 4 | Pine to Palm 100M 2025 (34 hours) † |
| 105716 | Santos | Juan | M | MA | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 100291 | Santos | Nuno | M | GBR | PT | 16 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 107858 | Santos | Rodrigo | M | Cambridgeshire | GB | 16 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 111531 | Sanz | Elena | F | ZARAGOZA | ES | 8 | Gran Trail Peñalara 110km 2025 (25 hours) |
| 126695 | Sarager | Lincoln | M | TX | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 124699 | Sarfati | François | M | Québec | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 105446 | Sari | Tami | F | PA | US | 32 | Twisted Branch 100km 2025 (20 hours) † |
| 108676 | Sarkis | Kelly | F | PA | US | 2 | C & O Canal 100M 2025 (30 hours) † |
| 127080 | Saroka | Kyle | M | Utah | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 127979 | Sarres | Mathieu | M | QC | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 103533 | Sasamoto | Wataru | M | JPN | JP | 16 | Angeles Crest 100M 2025 (36 hours) † |
| 105243 | Sashie | Daisuke | M | JPN | JP | 8 | OSJ Ontake 100km 2025 (20 hours) |
| 105886 | Sass | Alexander | M | Zug | CH | 64 | TOR130 - Tot Dret 130km 2025 (44 hours) |
| 121818 | Saterbak | Audun | M | IA | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 119988 | Sathasivam | Marimuthu | M | Pennsylvania | IN | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 127676 | Sather | Olivia | F | Idaho | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 123501 | Sato | Asahi | M | Kanagawa | JP | 1 | Mt Fuji 100M 2025 (46 hours) |
| 122163 | Sato | Etsuko | F | Tokyo | JP | 2 | OSJ Ontake 100km 2025 (20 hours) |
| 125189 | SATO | SOSUKE | M | TOKYO | JP | 1 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 121098 | Sauble | Daniel | M | OR | US | 2 | Waldo 100km 2025 (18 hours) † |
| 101460 | Sauer | Eric | M | Co | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 113853 | Sauerzapf | Volker | M | Niederösterreich | AT | 8 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 124451 | Saukkonen | Mika | M | Helsknki | FI | 1 | TOR100 - Cervino-Monte Bianco 100km 2025 (38 hours) |
| 117496 | Saunders | Greg | M | Nevada | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 104246 | Saunders | Ian | M | CA | US | 64 | Hood Hundred 100M 2025 (34 hours) |
| 101458 | Saunders | Steven | M | CHE | CH | 16 | North Downs Way 100M 2025 (30 hours) |
| 111988 | Savanh | Boomer | M | Or | LA | 8 | Hood Hundred 100M 2025 (34 hours) |
| 102985 | Savimaki | Ilkka | M | Pirkanmaa | FI | 16 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 116913 | Saviola | Anthony | M | Colorado | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 122465 | Sawa | Michito | M | Tokyo | JP | 2 | HURT 100M 2025 (36 hours) † |
| 111234 | SAWADA | Yukiko | F | Nagano | JP | 4 | OSJ Ontake 100km 2025 (20 hours) |
| 111785 | Sawayanagi | Takumi | M | Tokyo | JP | 8 | Okushinano 100km 2025 (21 hours) |
| 102127 | Sawyer | Tom | M | GBR | GB | 8 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 126971 | Saxey | Tracey | F | Utah | US | 1 | Cocodona 250M 2025 (125 hours) |
| 110572 | Saye | Tucker | M | Co | US | 16 | Leadville Trail 100M 2025 (30 hours) |
| 122375 | SAYLES | ALEX | M | Wisconsin | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 121809 | Saylor | Tysen | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 107324 | Sayre | Edward | M | MS | US | 8 | Rocky Raccoon 100M 2025 (30 hours) |
| 101397 | Scaglione | Stephane | M | QC | CA | 32 | Crazy Mountain 100M 2025 (36 hours) † |
| 105295 | Scaife | Mark | M | VA | US | 32 | Laurel Highlands 70.5M 2025 (20 hours) |
| 114759 | Scala | Holly | F | CA | US | 4 | Sean O'Brien 100km 2025 (17 hours) † |
| 126021 | Scalard | Marny | F | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 112828 | Scanlan | James | M | CALIFORNIA (CA) | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 103993 | Scanlan | Jeremy | M | MA | US | 2 | Hellgate 100km 2024 (17 hours) |
| 127409 | Scanzillo | Micah | M | MD | US | 1 | Eastern States 100M 2025 (36 hours) |
| 125007 | Scapuccin | Marcrlo | M | São Paulo | BR | 1 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 102118 | Scarbrough | John | M | CA | US | 256 | Javelina Jundred 100M 2025 (30 hours) † |
| 120732 | Scarlatta | Peter | M | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 112884 | Scarpato | Marcel | M | SP | BR | 8 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 117332 | Scarr | Jack | M | Greater London | GB | 2 | Fat Dog 100km 2025 (24 hours) |
| 101965 | Schaar | Matthew | M | DC | US | 64 | Zion 100km 2025 (19 hours) |
| 107748 | Schacherl | Jeffrey | M | CA | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 124081 | Schacherl | Simon | M | Bayern | DE | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 111182 | Schaefer | Andrew | M | MO | US | 8 | No Business 100M 2025 (34 hours) |
| 120877 | Schaefer | Harvey | M | Michigan | US | 2 | Bighorn 100M 2025 (35 hours) |
| 127267 | Schaefer | Jake | M | ID | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 113326 | Schaffhouser | Jennifer | F | CA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 114602 | Schall | Steve | M | PA | US | 8 | C & O Canal 100M 2025 (30 hours) † |
| 122798 | Schalla | Mark | M | IL | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 118522 | Schanz | Dustin | M | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 100251 | Schasse | Elisa | F | VA | US | 64 | Hennepin 100M 2025 (30 hours) |
| 120201 | Schaub | Andrea | F | MT | US | 2 | Crazy Mountain 100M 2025 (36 hours) † |
| 116787 | Schaub | Mike | M | Montana | US | 4 | Bighorn 100M 2025 (35 hours) |
| 127899 | Scheck | Justine | F | Yukon | CA | 1 | Black Canyon 100km 2025 (17 hours) † |
| 124436 | Scheer | Ed | M | IL | US | 1 | Never Summer 100km 2025 (23 hours) |
| 113372 | Scheid | Justin | M | NJ | US | 4 | Vermont 100M 2025 (30 hours) |
| 125406 | Scheidig | Alexander | M | Baden-Württemberg | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 126322 | Scheidt | Zachary | M | GA | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 107306 | Scheiter | Sebastian | M | California | US | 16 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 121220 | Scheltinga | Cornelis | M | Gelderland | NL | 2 | SwissPeaks 100km 2025 (28 hours) |
| 121226 | Scheltinga | Diederik | M | Gelderland | NL | 2 | SwissPeaks 100km 2025 (28 hours) |
| 117375 | Schenk | Simon | M | CA | US | 2 | San Diego 100M 2025 (32 hours) |
| 119502 | Schenkel | Christopher | M | Indiana | US | 2 | Indiana 100M 2025 (30 hours) |
| 111773 | Schenone | Kyle | M | Oregon | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 108825 | SCHEPEL | CHRIS | M | MI | US | 2 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 127602 | Scherr | Jakob | M | Rheinland Pfalz | DE | 1 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 112903 | Scherz | Alexander | M | Baselland | CH | 8 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 103488 | Schienstock | Dominik | M | VIC | AU | 16 | Surf Coast Century 100km 2025 (17 hours) |
| 123528 | Schierl | Marc | M | Lower saxony | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 127643 | Schiff | Daniel | M | HI | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 125928 | Schiffer | Michael | M | Saarland | US | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 123745 | Schill | Tobias | M | Badenwürttemberg | DE | 1 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 116118 | Schiller | Jessica | F | UT | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 126901 | Schilling | Amy | F | OR | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 125039 | Schindel | Caitlin | F | Saskatchewan | CA | 1 | Black Canyon 100km 2025 (17 hours) † |
| 102151 | Schindler | Louis | M | NZL | NZ | 32 | Canyons by UTMB 100M 2025 (35 hours) |
| 102269 | Schjei | Kathryn | F | CA | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 106460 | Schjolberg | Hallvard | M | NOR | NO | 16 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 107751 | Schlachte | Peter | M | DC | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 119754 | Schleicher | Jan | M | Bayern | DE | 2 | Zugspitz 100M 2025 (48 hours) |
| 126418 | Schleier | Reto | M | Zurich | CH | 1 | Swiss Alps 100km 2025 (22 hours) |
| 126823 | Schlinkmann | Bryan | M | UT | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 119731 | Schlömer | Karl-Heinz | M | Süderdeich104 | DE | 2 | Zugspitz 100M 2025 (48 hours) |
| 100150 | Schluter | Jessica | F | AUS | AU | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 126289 | Schmenk | Blake | M | GA | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 105204 | Schmid | John | M | CA | US | 64 | Quicksilver 100km 2025 (17 hours) † |
| 105995 | Schmidgall | Eric | M | OR | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 114831 | Schmidt | Bryan | M | IN | US | 2 | Indiana 100M 2025 (30 hours) |
| 119808 | Schmidt | Charles | M | MI | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 114886 | Schmidt | Florian | M | Baden-Württemberg | DE | 4 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 113755 | Schmidt | John | M | Alberta | CA | 8 | Dinosaur Valley 100km 2024 (22 hours) |
| 111066 | Schmidt | Karl | M | Ca | US | 8 | Fat Dog 100km 2025 (24 hours) |
| 118010 | Schmidt | Maurin | M | Zurich | CH | 4 | Tarawera by UTMB 100M 2025 (36 hours) |
| 103314 | Schmidt | Sean | M | OR | US | 1 | Western States 100M 2025 (30 hours) † |
| 122530 | Schmidt | Timmy | M | California | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 126841 | Schmidt | Zach | M | MT | US | 1 | Crazy Mountain 100M 2025 (36 hours) † |
| 115278 | Schmiedlechner | Christopher | M | Salzburg | AT | 4 | Transgrancanaria 125km 2025 (28 hours) |
| 103252 | Schmitt | Mike | M | MN | US | 2 | Mountain Lakes 100M 2025 (30 hours) † |
| 123469 | Schmitz | Matthias | M | Zurich | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 126807 | Schmoll | Elizabeth | F | California | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 118190 | Schneck | Lawrence | M | Devon | GB | 4 | Mozart by UTMB 119km 2025 (23 hours) |
| 100178 | Schneekloth | Martin | M | AL | US | 32 | Pine to Palm 100M 2025 (34 hours) † |
| 127799 | Schneider | Jeffrey | M | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 120850 | Schneider | Matthew | M | bc | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 127301 | Schneider | Michael | M | Washington | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 122461 | Schneider | Simon | M | Aargau | CH | 2 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 102165 | Schneiderman | Jim | M | NC | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 119464 | Schnier | Jessica | F | California | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 115472 | Schnoor | Greg | M | FL | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 113290 | Schoene | Brock | M | Washington | US | 4 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 116325 | Schoenhoff | Phillip | M | CA | US | 4 | San Diego 100M 2025 (32 hours) † |
| 111105 | Schoenhut | Steffen | M | Hamburg | DE | 4 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 127871 | Schöffl | Isabelle | F | Bavaria | DE | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 115258 | Scholtysik | Sebastian | M | Bavaria | DE | 4 | Zugspitz 106km 2025 (25 hours) |
| 125207 | Schonhoff | Aubrey | F | CA | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 102078 | Schooler | Michael | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 126988 | Schräder | Manuel | M | Rhineland-Palatinate | DE | 1 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 124556 | Schrandt | Lydia | F | TX | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 109767 | Schreiber | Tobias | M | NRW | DE | 8 | Gran Trail Courmayeur 100km 2025 (28 hours) |
| 123595 | Schroder | Brian | M | CO | US | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 116110 | Schroeder | Andrew | M | WI | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 126541 | Schroeder | Christian | M | IL | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 125822 | Schroeder | Daniel | M | OR | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 127834 | Schroeder | James | M | IN | US | 1 | Bighorn 100M 2025 (35 hours) |
| 103828 | Schroeder | Jason | M | OR | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 127557 | Schroeder | Jim | M | IL | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 123974 | Schröter | Oliver | M | Brandenburg | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 103919 | Schrum | Joe | M | AZ | US | 4 | Cocodona 250M 2025 (125 hours) |
| 123093 | Schubert | Daniel | M | Missouri | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 127010 | Schubert | Phil | M | Bavaria | DE | 1 | Zugspitz 100M 2025 (48 hours) |
| 126167 | Schuett | Duncan | M | AB | CA | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 125428 | Schuler | Yi | F | CA | US | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 125652 | Schuller | Eelco | M | Zuid Holland | NL | 1 | Swiss Alps 100M 2025 (50 hours) |
| 106484 | Schuller | Kat | F | GA | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 115695 | Schulman | Chloe | F | Ca | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 127160 | Schulman | Matt | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 115522 | Schultz | Benjamin | M | Wi | US | 4 | Never Summer 100km 2025 (23 hours) |
| 110436 | Schultz | Derek | M | Pa | US | 1 | Western States 100M 2025 (30 hours) † |
| 125429 | Schultz | Kelly | F | MD | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 120948 | Schultz | Todd | M | AZ | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 126245 | Schultz | Travis | M | WA | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 119611 | Schulz | Jayme | M | WI | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 118074 | Schulz | Julian | M | New South Wales | AU | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 109691 | Schulz-Nigmann | Lueder | M | Rheinland-Pfalz | DE | 8 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 110088 | Schulze | Dirk | M | VA | US | 4 | Yeti Virginia 100M 2025 (30 hours) † |
| 108510 | Schummer | Sherri | F | MN | US | 16 | Javelina Jundred 100M 2025 (30 hours) |
| 124758 | Schünke | Kevin | M | Bayern | DE | 1 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 100833 | Schurk | Christopher | M | CO | US | 2 | Bighorn 100M 2025 (35 hours) |
| 116590 | Schüßler | Isabel Martine | F | Baden Württemberg | DE | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 100491 | Schuster | Nick | M | GA | US | 128 | Burning River 100M 2025 (30 hours) |
| 100002 | Schuster | Stefan | M | CO | US | 1 | Western States 100M 2025 (30 hours) † |
| 119077 | Schutzbach | Dominik | M | Baden-Württemberg | DE | 2 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 126150 | Schuurman | Jorrit | M | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 117318 | Schwab | Alex | M | North Dakota | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 118670 | Schwab | Tyler | M | NV | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 124859 | Schwader | Kailee | N | SD | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 125253 | Schwan | Travis | M | Arizona | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 123155 | Schwantes | Rebecca | F | Colorado | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 108973 | Schwartz | Brian | M | NY | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 127962 | Schwartz | Michael | M | QC | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 121803 | Schwartz | Stephanie | F | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 111535 | Schwarz | Stefan | M | Bitte wählen Sie Region, Land oder Bundesland | AT | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 101462 | Schwarzbauer | Alexander | M | FL | US | 64 | Black Canyon 100km 2025 (17 hours) † |
| 121389 | Schwarzbauer | Maxi | F | Berlin | DE | 2 | Swiss Alps 100km 2025 (22 hours) |
| 108553 | Schwee | Rylee | F | Maryland | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 100874 | Schweitzer | Lauren | F | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 101145 | Schwenkenberg | Alexander | M | CA | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 127786 | Schweyen | Mason | M | MT | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 104572 | Schwindt | Eric | M | OR | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 123815 | Schwoeppe | Tim | M | OH | US | 1 | No Business 100M 2025 (34 hours) |
| 113028 | Sciacca | Derek | M | MN | US | 8 | Superior 100M 2025 (38 hours) † |
| 124948 | Sciarretti | Nick | M | Ohio | US | 1 | Burning River 100M 2025 (30 hours) |
| 124792 | Scofield | Jeffrey | M | CA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 109781 | Scofield | Martin | M | Huesca | ES | 8 | Grand Raid des Pyrénées - Ultra 160km 2025 (48 hours) |
| 119866 | Scopel | Paolo | M | TV | IT | 2 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 125769 | Scott | Abigail | F | California | US | 1 | Guzzler Ultra 100km 2025 (24 hours) |
| 124534 | Scott | Barner | M | MS | US | 1 | No Business 100M 2025 (34 hours) |
| 124621 | Scott | Brandon | M | Texas | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 127690 | Scott | Cole | M | CA | US | 1 | Sedona Canyons 125M 2025 (52 hours) |
| 124493 | Scott | Fergus | N | ME | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 109678 | Scott | Hunter | M | New South Wales | AU | 8 | Buffalo Stampede 100km 2025 (23 hours) |
| 112270 | Scott | Ian | M | AZ | US | 4 | Bighorn 100M 2025 (35 hours) |
| 101563 | Scott | John | M | WA | US | 8 | Cascade Crest 100M 2025 (34 hours) |
| 118198 | Scott | Kellen | M | CA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 105669 | Scott | Kirstin | F | WA | US | 4 | Fat Dog 100km 2025 (24 hours) |
| 126947 | Scott | Kyle | M | Pennsylvania | US | 1 | Eastern States 100M 2025 (36 hours) |
| 114216 | Scott | Peter | M | New South Wales | AU | 8 | Surf Coast Century 100km 2025 (17 hours) |
| 116443 | Scott | Rebecca | F | LA | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 115108 | Scotti | Nicola | M | Italy | IT | 4 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 116084 | Seal-Jones | Tanya | F | BC | CA | 2 | Moab 238M 2025 (108 hours) † |
| 112603 | Seals | John | M | IA | US | 8 | Tahoe 202M 2025 (100 hours) † |
| 124214 | Seaman | Adam | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 121026 | Searcy | Joseph | M | TX | US | 2 | Dinosaur Valley 100M 2024 (35 hours) † |
| 126462 | Searels | Matthew | M | Tennessee | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 119446 | Searels | Rebekah "Luci" | F | Tennessee | US | 2 | No Business 100M 2025 (34 hours) |
| 105891 | Searle-Brown | Sarah | F | GBR | GB | 16 | North Downs Way 100M 2025 (30 hours) |
| 124476 | Sears | Kyle | M | California | US | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 122581 | Seaton | Andrew | M | BC | CA | 2 | Fat Dog 100km 2025 (24 hours) |
| 102424 | Secord | David | M | IL | US | 16 | Bear, The 100M 2025 (36 hours) † |
| 125386 | Sedar | Patrick | M | Styria | AT | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 110772 | Sedivy | Nicholas | M | OH | US | 16 | Burning River 100M 2025 (30 hours) |
| 108132 | Seeba | Garett | M | TX | US | 16 | Bigfoot 206M 2025 (100 hours) † |
| 108687 | Seeba | Kat | F | CA | US | 4 | Quicksilver 100km 2025 (17 hours) |
| 127696 | Seebass | Brody | M | Ca | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 104395 | Seeley | Joe | M | CA | US | 128 | Black Canyon 100km 2025 (17 hours) |
| 118163 | Seelos | Mark | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 110777 | Segal | Jeremy | M | MN | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 125819 | Segal | Joshua | M | MN | US | 1 | Superior 100M 2025 (38 hours) |
| 123762 | segura | Cedric | M | Rhone | FR | 1 | Black Canyon 100km 2025 (17 hours) † |
| 124155 | Sehabiague | Laurent | M | PA | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 113673 | Seibel | Ben | M | WI | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 112691 | Seidel | Hayden | M | MO | US | 8 | Kettle Moraine 100M 2025 (30 hours) |
| 111106 | Seidel | Matthew | M | CA | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 123247 | Seidlova | Aneta | F | New York | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 120158 | Seijas | Gabriel | M | NY | US | 2 | Twisted Branch 100km 2025 (20 hours) |
| 124141 | Seitz | John | M | Texas | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 120216 | Seiz | Keith | M | IL | US | 2 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 125995 | Seker | Yunus | M | Luxembourg | LU | 1 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 hours) |
| 105442 | Seki | Rieko | F | JPN | JP | 32 | Lake Biwa 100M 2025 (52 hours) |
| 105434 | Seki | Takeshi | M | JPN | JP | 64 | OSJ Ontake 100km 2025 (20 hours) |
| 126387 | Sekiya | Masako | F | Kanagawa-ken | JP | 1 | Mt Fuji 100M 2025 (46 hours) |
| 115637 | Selby | Mitchel | M | Quebec | CA | 4 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 113519 | Self | David | M | WA | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 126336 | Self | Justin | M | Alabama | US | 1 | Pinhoti 100M 2025 (32 hours) |
| 125251 | Sellers | Cory | M | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 111777 | Sellers | Stuart | M | Somerset | GB | 4 | Thames Path 100M 2025 (30 hours) |
| 126724 | SELO | Jérémy | M | Haute-Savoie | FR | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 102065 | Seman | Milan | M | Pardubice | CZ | 64 | Krakonosova Stovka 100km 2025 (22 hours) |
| 120080 | Sember | Addison | F | CA | US | 2 | Waldo 100km 2025 (18 hours) † |
| 127924 | Sembiante | Roberto | M | UT | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 103701 | Semerjian | Maria | F | FRA | FR | 32 | Hardrock 100M 2025 (48 hours) † |
| 100509 | Semonell | Jodi | F | NE | US | 32 | HURT 100M 2025 (36 hours) † |
| 124724 | Semore | Dan | M | MS | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 101778 | Sen | Niloy | M | CA | US | 32 | Quicksilver 100km 2025 (17 hours) † |
| 104659 | Senda | Yui | M | Kanagawa | JP | 64 | Aso Volcano Trail 115km 2025 (28 hours) |
| 106766 | Senne | De Schouwer | M | België | BE | 64 | Penyagolosa 106km 2025 (26 hours) |
| 120984 | Senol | Derya | F | CO | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 105826 | Seo | Nobuka | F | JPN | JP | 128 | Run Rabbit Run 100M 2025 (36 hours) |
| 121247 | Seppälä | Ilkka | M | Pirkanmaa | FI | 2 | Nuts Ylläs Pallas 160km 2025 (35 hours) |
| 127181 | Seppala | Tyler | M | NH | US | 1 | No Business 100M 2025 (34 hours) |
| 119774 | Serban | Mihai | M | Bucharest | RO | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 114136 | Sergeant | Erika | F | BC | CA | 1 | Black Canyon 100km 2025 (17 hours) † |
| 127365 | Serna | Dennis | M | NJ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 126220 | Serov | Pavel | M | Veslandet | NO | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 118203 | Serran | Scott | M | Ontario | CA | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 102878 | Servais | Mallory | F | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 115779 | Servera | Charis | F | CO | US | 4 | Sean O'Brien 100km 2025 (17 hours) † |
| 105217 | Service | Patrick | M | CA | US | 16 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 112402 | Setian | Carrie | F | AK | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 122225 | SETTELE | DOUG | M | NH | US | 2 | Vermont 100M 2025 (30 hours) |
| 124473 | Settle | Matthew | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 124596 | Seutter | Tyler | M | PA | US | 1 | Eastern States 100M 2025 (36 hours) |
| 122541 | Sevaux | Gregoire | M | Sarthe | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125903 | sevaux | stanislas | M | sarthe | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 119980 | Sevel | Dani | F | VA | US | 2 | Hellgate 100km 2024 (17 hours) |
| 101216 | Severino | Anthony | M | IL | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 125209 | Severson | Carson | N | CA | US | 1 | Zion 100M 2025 (36 hours) |
| 104513 | Severson | Christopher | M | CA | US | 1 | Western States 100M 2025 (30 hours) |
| 120116 | Seward | Sophie | F | Suffolk | GB | 2 | Autumn 100M 2025 (28 hours) |
| 101972 | Sewell | Lauren | F | AR | US | 64 | Arkansas Traveler 100M 2025 (30 hours) |
| 101966 | Sewell | Matthew | M | NV | US | 4 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 124207 | Sexsmith-Brosseau | Sean | M | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 124248 | Sexton | Iris | F | OR | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 124413 | Seymour | Jim | M | MO | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 124928 | Seymour | Kendra | F | OR | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 109126 | Sgarlata | Francesco | M | Lombardia | IT | 1 | Western States 100M 2025 (30 hours) † |
| 123880 | Shade | Robbie | M | MA | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 118185 | Shady | Lindsey | F | AL | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 122611 | Shah | Harshil | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 114046 | shah | jaymin | M | California | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 109839 | Shah | Nilesh | M | Ohio | US | 16 | Twisted Branch 100km 2025 (20 hours) † |
| 124445 | Shalla | Elyssa | F | UT | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 108281 | Shalvoy | Corinne | F | CO | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 115838 | Shalvoy | Graham | M | Colorado | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 123942 | Shan | Xin | F | California | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 127354 | Shanahan | Joseph | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 104123 | Shapiro | Aaron | M | MD | US | 64 | Hellgate 100km 2024 (17 hours) |
| 107042 | Sharbono | Brian | M | Florida | US | 32 | Tahoe 202M 2025 (100 hours) † |
| 124576 | Sharkey | Rich | M | PA | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 106044 | Sharland Riggs | Jennie | F | AUS | AU | 32 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 122113 | Sharma | Gaurav | M | Chiba | JP | 2 | FunTrails Chichibu & Okumusashi 105km 2024 (30 hours) |
| 114052 | Sharma | Neeraj | M | Haryana | IN | 2 | South Downs Way 100M 2025 (30 hours) |
| 124111 | Sharow | Kyle | M | FL | US | 1 | Cocodona 250M 2025 (125 hours) |
| 103805 | Sharp | Joshua | M | CA | US | 64 | Black Canyon 100km 2025 (17 hours) † |
| 116053 | Sharp | Sean | M | Ontario | CA | 4 | Sulphur Springs 100M 2025 (30 hours) |
| 117319 | Sharples | Ericka | F | CA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 118059 | Shatrov | Vlad | M | New South Wales | AU | 2 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 115704 | Shaw | Dane | M | Texas | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 108534 | Shaw | Daniel | M | Alabama | US | 16 | Rocky Raccoon 100M 2025 (30 hours) |
| 126234 | Shaw | David | M | Utah | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 100077 | Shaw | Derren | M | AUS | AU | 64 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 103027 | Shaw | Gary | M | MO | US | 32 | Rim to River 100M 2025 (32 hours) † |
| 123628 | Shaw | John | M | WA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 123445 | Shaw | Lee | M | MI | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 125294 | Shaw | Ryley | M | Nsw | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 123759 | Shaw | Tom | M | Nottinghamshire | GB | 1 | Autumn 100M 2025 (28 hours) |
| 126559 | Shea | Greg | M | MA | US | 1 | Vermont 100km 2025 (17 hours) |
| 117563 | Shea | Joshua | M | il | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 126644 | Shea | Tom | M | Pa | US | 1 | Worlds End 100km 2025 (19 hours) |
| 124032 | Shearer | John | M | PA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 114285 | Shearn | Taylor | F | Florida | US | 2 | Zion 100M 2025 (36 hours) † |
| 107172 | Shearon | Paula | F | North Carolina | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 125691 | Sheedy | Tim | M | Victoria | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 126359 | Sheehan | Danny | M | NY | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 100116 | Sheehan | William | M | GBR | GB | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 107883 | Sheets | Susan | F | Virginia | US | 2 | Yeti Virginia 100M 2025 (30 hours) |
| 110854 | Sheetz-Willard | Jacob | M | CO | US | 8 | Bighorn 100M 2025 (35 hours) |
| 124480 | Sheikh | Elaine | F | MI | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 127642 | Shein | Jason | M | NSW | AU | 1 | Taupo 100km 2025 (17 hours) |
| 108914 | Shelby | Bo | M | CO | US | 16 | Leadville Trail 100M 2025 (30 hours) |
| 126383 | Sheldon | Troy | M | California | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 101579 | Shemyakin | Mikhail | M | CA | US | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126072 | shen | andrew | M | NY | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 124990 | Shen | Eric | M | NY | US | 1 | Vermont 100km 2025 (17 hours) |
| 111821 | Shen | Yilun | M | London | GB | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 112074 | Sheng | Huanyuan | M | VA | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 121936 | Shep | John | M | Ontario | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 126366 | Shepard | Cindy | F | Oregon | US | 1 | Western States 100M 2025 (30 hours) † |
| 113276 | Shepard | Ryan | M | CA | US | 4 | San Diego 100M 2025 (32 hours) |
| 124976 | Shepherd | Kimberly | F | MA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 118123 | Shepherd-Powell | Julie | F | North Carolina | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 100921 | Sherfey | Kenneth | M | CA | US | 32 | San Diego 100M 2025 (32 hours) † |
| 124524 | Sherfick | Jean | F | IN | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 101648 | Sherfy | Brett | M | VA | US | 8 | Umstead 100M 2025 (30 hours) |
| 120219 | Sheridan | Brian | M | Illinois | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 123917 | Sheridan | Laura | F | Missouri | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 116201 | Sheridan | Tom | M | ON | CA | 4 | Hong Kong 100K 100km 2025 (23 hours) |
| 110222 | sherlock | Jake | M | Lothian | GB | 16 | South Downs Way 100M 2025 (30 hours) |
| 119532 | Sherman | Adam | M | California | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 125361 | Sherman | Audrey | F | Or | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 127570 | Sherman | Kevin | M | TX | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 123871 | Sherman | Micah | M | WA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126331 | Sherman | Robert | M | MD | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 121467 | Sherman | Stephen | M | WI | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 125335 | Sherman | Zak | M | Victoria | AU | 1 | Surf Coast Century 100km 2025 (17 hours) |
| 127128 | Sheth | Nilay | M | Arizona | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 126444 | Shetler | Cory | M | PA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 126495 | Shetley | Andrew | M | TN | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 121184 | Shetty | Jaya | M | CA | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125715 | Sheyda | Luke | M | California | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 105135 | Shi | Fuqiang | M | CA | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 122117 | SHI | NAI | M | GUANGDONG | CN | 2 | Mt Fuji 100M 2025 (46 hours) |
| 120840 | Shia | Sook Sian | F | Penang | MY | 2 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 122072 | Shibata | Michiko | F | Nagano | JP | 2 | Massanutten 100M 2025 (36 hours) † |
| 115175 | Shibata | Seiji | M | Chiba | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 118180 | Shibley | Edward | M | MA | US | 4 | Worlds End 100km 2025 (19 hours) |
| 108754 | Shields | Eric | M | Virginia | US | 16 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124592 | Shields | Nicholas | M | CA | US | 1 | San Diego 100M 2025 (32 hours) † |
| 120287 | Shiflett | Brandon | M | IN | US | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 117135 | Shimamura | Shinichi | M | Hyogo | JP | 2 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 123038 | Shimazu | Hiroyuki | M | Mie-ken | JP | 2 | OSJ Ontake 100M 2025 (24 hours) |
| 127807 | Shimodaira | Ryuhei | M | Tokyo | JP | 1 | FunTrails Chichibu & Okumusashi 105km 2024 (30 hours) |
| 121214 | SHIMOI | MAKIKO | F | kanagawa | JP | 2 | FunTrails Chichibu & Okumusashi 105km 2024 (30 hours) |
| 127790 | Shin | Sung | M | Seoul | KR | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 127255 | Shinar | Jason | M | NV | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 126992 | Shingler | Randolph | M | MD | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 120376 | Shingleton | Frank | M | North Carolina | US | 2 | C & O Canal 100M 2025 (30 hours) † |
| 124360 | Shinholser | Amanda | F | Idaho | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 125505 | Shinholser | Dustin | M | Georgia | US | 1 | Georgia Death Race 74M 2025 (24 hours) |
| 112898 | Shiotsuki | Kentaro | M | Kanagawa | JP | 8 | Shinetsu Five Mountains Trail 110km 2025 (22 hours) |
| 123244 | Shiraishi | Tadaaki | M | Gunma | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 106196 | Shirk | Benjamin | M | PA | US | 32 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 110033 | Shirley | Brad | M | PA | US | 16 | Georgia Death Race 74M 2025 (24 hours) † |
| 119975 | Shirley | Harper | F | pennsylvania | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 122598 | Shirman | Andrew | M | CA | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 101448 | Shiva | Sankalp | M | TX | US | 32 | Fat Dog 100km 2025 (24 hours) |
| 126886 | Shnall | Adi | F | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 104943 | Shoenberger | Nicole | F | MD | US | 32 | No Business 100M 2025 (34 hours) |
| 109556 | Sholley | Jared | M | PA | US | 16 | Worlds End 100km 2025 (19 hours) |
| 120838 | Shook | Bryant | M | CA | US | 2 | Cocodona 250M 2025 (125 hours) |
| 116957 | SHORES | JOEL | M | CO | US | 2 | Black Canyon 100km 2025 (17 hours) |
| 124881 | Short | Nicholas | M | Hawaii | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 124018 | Short | Sarah | F | IL | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 124542 | Shou | Jason | M | TX | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 103210 | Showers | Monica | F | AL | US | 64 | Rim to River 100M 2025 (32 hours) † |
| 117504 | Shrank | Jordan | M | Western Cape | ZA | 2 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 127574 | Shreeve | Jake | M | Vaud | CH | 1 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 122237 | SHRONTZ | Jason | M | OR | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 108174 | Shugall | Ilyce | F | CA | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 112208 | Shughrue | Chris | M | NY | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 107756 | Shulack | Jackie | F | New Jersey | US | 16 | Laurel Highlands 70.5M 2025 (20 hours) |
| 104267 | Shultis | Jennifer | F | WA | US | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 115198 | Shunmugam | Abimanyu | N | Singapore | SG | 2 | Ulju Trail Nine Peaks 128km 2025 (40 hours) |
| 122535 | shuraku | tadashi | M | Tokyo | JP | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 109477 | Shyu | Rosalie | F | Il | US | 8 | Sulphur Springs 100km 2025 (18 hours) |
| 125588 | Sianez | Greg | M | Ca | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 112193 | Sibert | Herve | M | - | FR | 8 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 125221 | Sibille | Stephanie | F | CT | US | 1 | Vermont 100km 2025 (17 hours) |
| 122566 | Sic Cajbón | Kelinton Ottoniel | M | Guatemala | GT | 2 | SwissPeaks 360km 2025 (156 hours) |
| 120049 | Sicard | Saul | N | MA | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 107661 | Sicher | Nathan | M | Missouri | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 113451 | Sickenberger | William | M | TN | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 118335 | Šicko | Ján | M | Slovakia | SK | 4 | Javornika 105km 2025 (24 hours) |
| 121820 | Siddons | Brian | M | MN | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 112775 | Sidic | Mike | M | BC | CA | 4 | Fat Dog 100km 2025 (24 hours) |
| 126034 | siecker | damien | M | france | FR | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 118610 | Sieger | Philipp | M | NRW | DE | 4 | Transgrancanaria 125km 2025 (28 hours) |
| 116238 | Siegle-Gaither | Mercedes | F | CO | US | 4 | HURT 100M 2025 (36 hours) † |
| 126505 | Sierra Barahona | Joseph | M | Ciudad de Mexico | MX | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 112627 | Sievers | Ryan | M | TN | US | 1 | Western States 100M 2025 (30 hours) † |
| 127820 | Sifonios | David | M | Vaud | CH | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 113140 | Sifri | Costi | M | VA | US | 8 | Long Haul 100M 2025 (30 hours) † |
| 121357 | Sikora | Jason | M | Illinois | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 110655 | Sikoski | Paul | M | Florida | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 123512 | Silitonga | Ehud | M | CA | US | 1 | San Diego 100M 2025 (32 hours) |
| 119452 | Silva | Ellen | F | NM | US | 2 | Hardrock 100M 2025 (48 hours) † |
| 112563 | Silva | Marco | M | Setubal | PT | 8 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 123455 | Silva | Matthew | M | GA | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 126424 | Silva Tereso | Duarte | M | Leiria | PT | 1 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 126142 | Silver | Ben | M | California | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 119894 | Simeone | Matt | M | VA | US | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 122588 | Simko | Marek | M | NY | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 125709 | Simmerling | Robert | M | Alberta | CA | 1 | Gorge Waterfalls 100km 2025 (18 hours) |
| 115807 | simmons | chris | M | texas | US | 2 | Tahoe 202M 2025 (100 hours) † |
| 127075 | Simmons | Drew | M | South Carolina | US | 1 | Georgia Death Race 74M 2025 (24 hours) |
| 107219 | Simmons | Ryan | M | CO | US | 16 | Leadville Trail 100M 2025 (30 hours) |
| 125672 | Simon | Edouard | M | London | GB | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 127511 | Simon | Garrett | M | Vermont | US | 1 | Vermont 100M 2025 (30 hours) |
| 124828 | Simon | Matthew | M | California | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 124298 | Simon | William | M | France | FR | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 108769 | Simonds | Daniel | M | California | US | 4 | Grindstone by UTMB 100km 2025 (18 hours) |
| 107047 | Simone | Maria | F | CO | US | 1 | Western States 100M 2025 (30 hours) † |
| 118657 | Simonek | Rudy | M | France | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 123109 | Simons | Michael | M | California | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 114548 | Simpanen | Juuso | M | Uusimaa | FI | 8 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 117518 | Simpson | Andrew | M | Surrey | GB | 4 | Thames Path 100M 2025 (30 hours) |
| 101301 | Simpson | Andrew | M | PA | US | 8 | Twisted Branch 100km 2025 (20 hours) † |
| 104829 | Simpson | Cliff | M | NC | US | 16 | Hellbender 100M 2025 (40 hours) † |
| 124455 | Simpson | Graham | M | Scotland | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 102948 | Simpson | Shane | M | AUS | AU | 4 | Leadville Trail 100M 2025 (30 hours) |
| 112430 | Simpson | Todd | M | Oregon | US | 8 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 123684 | Sims | Justin | M | OR | US | 1 | Mountain Lakes 100M 2025 (30 hours) |
| 125240 | Sinanovic | Deanne | F | Queensland | AU | 1 | Blackall 100km 2025 (18 hours) |
| 111993 | Sinclair | Dylan | N | Arizona | US | 4 | Wasatch Front 100M 2025 (36 hours) † |
| 101233 | Sinclair | Ken | M | OR | US | 1 | Waldo 100km 2025 (18 hours) † |
| 110090 | Sinclair | Paul | M | California | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 115833 | Singer | Jill | F | Ohio | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 125602 | Singer | Rafer | M | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 123685 | Singh | Amber | F | Or | US | 1 | Waldo 100km 2025 (18 hours) † |
| 121387 | Singh | Satnam | M | Karnataka | IN | 2 | Malnad Ultra 100km 2024 (21 hours) |
| 105965 | Singh | Shavinder | M | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 117296 | Sinha | Ron | M | Minato | JP | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 127599 | Sink | Paul | M | IA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 110957 | Sio | Aroa | F | Pontevedra | ES | 8 | Black Canyon 100km 2025 (17 hours) † |
| 123739 | Sipe | Justin | M | NV | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 101497 | Sipe | Laurel | F | MN | US | 32 | San Diego 100M 2025 (32 hours) † |
| 124706 | Sipila | Pia | F | Zurich | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 124628 | Sipling | Chesson | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 123593 | Sirois | Olivier | M | Quebec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 125917 | Sirot | Philippe | M | Île de France | FR | 1 | Restonica Trail by UTMB - Ultra-Trail® di Corsica 110km 2025 (36 hours) |
| 100300 | Sisengrath | Greg | M | TX | US | 2 | Cascade Crest 100M 2025 (34 hours) |
| 127498 | Sisson | Lillian | F | MS | US | 1 | Mamba 100M 2024 (34 hours) † |
| 125782 | Sitta | Joe | M | NM | US | 1 | Zion 100M 2025 (36 hours) |
| 101435 | Sitzmann | Holly | F | DC | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 127959 | Sjolund | Adam | M | WA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 121704 | Skeehan | David | M | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 102868 | Skeels | Sam | M | MI | US | 1 | Western States 100M 2025 (30 hours) † |
| 123865 | Skelton | Luke | M | TX | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 119847 | Skersyte | Renata | F | NM | US | 2 | Cocodona 250M 2025 (125 hours) |
| 102259 | Skidnuk | Jordan | M | BC | CA | 32 | Lost Soul Ultra 100M 2025 (33 hours) † |
| 105251 | Skiles | Kevin | M | CA | US | 4 | Cuyamaca 100km 2025 (17 hours) † |
| 122533 | Skinn | Andy | M | BC | CA | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124335 | Skladany | Ashley | F | VA | US | 1 | Eastern States 100M 2025 (36 hours) |
| 120401 | Skloven-Gill | Jonathan | M | Colorado | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 110051 | Skoda | Ronald | M | CA | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 121919 | Skogen | Andreas | M | Akershus | NO | 2 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 126544 | Skogman | Jasper | M | GA | US | 1 | Cruel Jewel 106M 2025 (48 hours) † |
| 126330 | Skorapa | Victor | M | California | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 103543 | Skorokhod | Oleksandr | M | UKR | UA | 16 | C & O Canal 100M 2025 (30 hours) † |
| 109360 | Skowron | Radoslaw | M | Malopolska | PL | 8 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 118627 | Skowrup | Tyler | M | CA | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 123789 | Skřivánek | Michal | M | Slovakia | SK | 1 | Javornika 105km 2025 (24 hours) |
| 111757 | Skúlason | Kristján | M | Höfuðborgarsvæðið | IS | 2 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 127680 | Skwarek | Kamil | M | Colorado | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 112750 | Slabach | Aaron | M | Va | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 108633 | Slack | Nick | M | Virginia | US | 16 | Massanutten 100M 2025 (36 hours) |
| 124286 | Slade | Topher | M | MO | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 119945 | Slagter | Kenneth | M | Ontario | CA | 1 | Hennepin 100M 2025 (30 hours) |
| 121909 | Slampa | Martin | M | Czechia | CZ | 2 | Javornika 105km 2025 (24 hours) |
| 101050 | Slate | Kim | F | OR | US | 64 | Cascade Crest 100M 2025 (34 hours) |
| 123131 | Slattengren | Blake | M | Washington | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 100592 | Slavin | Meghan | F | AZ | US | 4 | Bear, The 100M 2025 (36 hours) † |
| 108864 | Slawson | Tyler | M | Washington | US | 16 | IMTUF 100M 2025 (36 hours) † |
| 115082 | Slifer | Kevin | M | PA | US | 2 | Worlds End 100km 2025 (19 hours) |
| 120243 | Sliney | Charlie | M | Oregon | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) |
| 121831 | Sloan | Tyler | M | MA | US | 2 | Kerry Way Ultra 101km 2025 (20 hours) |
| 109764 | Slobodian | Adam | M | MT | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 119926 | Slotnick | Scott | M | MI | US | 2 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 110034 | Slotterbach | Bryan | M | PA | US | 16 | Rio Del Lago 100M 2025 (30 hours) |
| 103563 | Slovak | Tomas | M | CZE | CZ | 64 | Krakonosova Stovka 100km 2025 (22 hours) |
| 122385 | Slowik | David | M | Mississippi | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 126865 | Slynn | Harriet | F | Middx | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 102889 | Smail | Joseph | M | MD | US | 2 | Indiana 100M 2025 (30 hours) |
| 113197 | Small | John | M | IA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 120178 | Small | Matthew | M | CO | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 107527 | Smallcomb | Chris | M | NV | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 127681 | Smart | Erik | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 111407 | Smeach | Bryan | M | PA | US | 8 | Laurel Highlands 70.5M 2025 (20 hours) |
| 127218 | Smejkal | Ondrej | M | Plzensky kraj | CZ | 1 | Krakonosova Stovka 100km 2025 (22 hours) |
| 114200 | Smiley | Thomas | M | ID | US | 8 | Wasatch Front 100M 2025 (36 hours) |
| 103156 | Smilor | Kevin | M | CO | US | 16 | Cascade Crest 100M 2025 (34 hours) |
| 127942 | Smirnova | Adelina | F | Kanagawa | JP | 1 | Aso Volcano Trail 115km 2025 (28 hours) |
| 106468 | Smit | Pascal | M | NLD | NL | 32 | Transgrancanaria 125km 2025 (28 hours) |
| 122281 | Smith | Aaron | M | MN | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 114047 | Smith | Andrea | F | CA | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 103286 | Smith | Brian | M | PA | US | 64 | Beaverhead 100km 2025 (20 hours) |
| 112689 | Smith | Chad | M | New York | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 105032 | Smith | Charles | M | CA | US | 32 | Cuyamaca 100km 2025 (17 hours) † |
| 120510 | Smith | Chase | M | Connecticut | US | 2 | Vermont 100M 2025 (30 hours) |
| 107554 | Smith | Chase | M | OH | US | 8 | Twisted Branch 100km 2025 (20 hours) † |
| 115836 | Smith | Colin | M | MA | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 125086 | Smith | Coriston | M | California | US | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 100317 | Smith | Craig | M | AL | US | 1 | Western States 100M 2025 (30 hours) † |
| 115629 | Smith | Daniel | M | SC | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 115364 | Smith | Daniel | M | Isle of Wight | GB | 4 | North Downs Way 100M 2025 (30 hours) |
| 102000 | Smith | Darian | M | NC | US | 128 | Hellbender 100M 2025 (40 hours) † |
| 127958 | Smith | Garrett | M | Utah | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 104600 | Smith | Ian | M | ZAF | ZA | 16 | SkyRun 100km 2024 (28 hours) |
| 126803 | Smith | Jennie | F | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 117139 | Smith | Jeremy | M | NC | US | 4 | Umstead 100M 2025 (30 hours) |
| 118272 | Smith | Jesse | M | West Virginia | US | 4 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 126350 | Smith | Joel | M | IDAHO | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 109207 | Smith | Jonathan | M | PA | US | 8 | Eastern States 100M 2025 (36 hours) |
| 126627 | Smith | Jordan | M | Ohio | US | 1 | Mohican 100M 2025 (32 hours) |
| 124849 | Smith | Joshua | M | WY | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 123888 | Smith | Madi | F | Ohio | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 105596 | Smith | Mike | M | NM | US | 32 | Mamba 100M 2024 (34 hours) † |
| 123222 | Smith | Mike | M | WA | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 109753 | Smith | Nathan | M | Oregon | US | 16 | IMTUF 100M 2025 (36 hours) † |
| 110546 | Smith | Oliver | M | East Sussex | GB | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 113501 | Smith | Orran | M | Isle of man | GB | 8 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 103677 | Smith | Pam | F | OR | US | 64 | Waldo 100km 2025 (18 hours) † |
| 122257 | Smith | Randal | M | SC | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 114669 | Smith | Rusty | M | Georgia | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 109287 | Smith | Ryan | M | CO | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 127326 | SMITH | RYAN | M | IL | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 126821 | Smith | Sean | M | NY | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 124121 | Smith | Sean | M | MA | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 121194 | Smith | Thomas | M | TX | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 114127 | Smith | Timothy | M | MN | US | 2 | Superior 100M 2025 (38 hours) |
| 106178 | Smith | Trevor | M | AUS | AU | 2 | Blackall 100km 2025 (18 hours) |
| 120277 | Smith | Vernon | M | GA | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 122264 | Smith | Wade | M | OR | US | 2 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 113164 | Smith | Wayne A.M. | M | Alberta | CA | 8 | Zion 100km 2025 (19 hours) |
| 126538 | Smith | William | M | Gloucestershire | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 100581 | Smithberger | Jay | M | OH | US | 8 | Mohican 100M 2025 (32 hours) |
| 125517 | SMITHSON | JENNIFER | F | VA | US | 1 | Cocodona 250M 2025 (125 hours) |
| 113822 | Smoker | Rhoda | F | PA | US | 8 | Massanutten 100M 2025 (36 hours) † |
| 127618 | Smol | Christophe | M | France | FR | 1 | Grand Raid Ventoux by UTMB 124km 2025 (30 hours) |
| 111786 | Smook | Ryan | M | Alberta | CA | 1 | Western States 100M 2025 (30 hours) † |
| 111203 | Smotek | Nick | M | Az | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 112611 | Smythe | Matt | M | VA | US | 8 | Yeti Virginia 100M 2025 (30 hours) † |
| 125622 | Snakenberg | Derek | M | Iowa | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 105325 | Snitker | Anthony | M | CA | US | 64 | Crazy Mountain 100M 2025 (36 hours) † |
| 112397 | Snow | Kimber | F | Alberta | CA | 8 | Cocodona 250M 2025 (125 hours) |
| 113088 | Snowaert | Joseph | M | DC | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 127758 | Snowbarger | Robert | M | TX | US | 1 | Dinosaur Valley 100M 2024 (35 hours) |
| 124956 | Snyder | Erin | F | WV | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 120276 | Snyder | Kabuki | F | California | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 127232 | Snyder | Kat | F | ME | US | 1 | Vermont 100km 2025 (17 hours) |
| 126003 | Snyder | Luke | M | PA | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 125213 | Snyder | Robert | M | Utah | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 105047 | Snyder | Scott | M | KS | US | 32 | Arkansas Traveler 100M 2025 (30 hours) |
| 126092 | Snyderman | Reed | M | UT | US | 1 | Run Rabbit Run 100M 2025 (36 hours) † |
| 126263 | So | Junine | F | WA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 112085 | So | Richard | M | BC | CA | 8 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 118151 | Sobesky | Matías | M | Montevideo | UY | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 116197 | Sobie | Chris | M | CO | US | 4 | Grindstone by UTMB 100M 2025 (36 hours) |
| 124331 | Sobieraj | Magdalena | F | POLASKA | DE | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 124995 | Soden | Sasha | F | British Columbia | CA | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 127087 | Soderberg-Chase | Collin | M | OR | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 104382 | Sohara | Kentaro | M | JPN | JP | 8 | Transgrancanaria 125km 2025 (28 hours) |
| 107176 | Sokolovskyy | Dmytro | M | CA | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 118523 | SOL | Maxime | M | FRANCE | FR | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 117277 | Solari | Marc | M | NH | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 123368 | solberg | Ryan | M | OR | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 124575 | Solem | Eirik | M | Romsdal | NO | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 101907 | Soles | Gillian | F | CA | US | 32 | Javelina Jundred 100M 2025 (30 hours) † |
| 104004 | Solis | Adelaido | M | CA | US | 256 | Hardrock 100M 2025 (48 hours) † |
| 127677 | Solis | Greg | M | CA | US | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 119211 | Soliz | Daniel | M | NM | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 110122 | Solodsky | Andrei | M | NJ | US | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 109512 | Solomon | Carl | M | CO | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 108520 | SOLUM | DEREK | M | NC | US | 8 | Wasatch Front 100M 2025 (36 hours) † |
| 125821 | Soly | Katelynn | F | FL | US | 1 | Long Haul 100M 2025 (30 hours) |
| 121584 | Somarakis | Philip | M | Oxfordshire | GB | 2 | Thames Path 100M 2025 (30 hours) |
| 107701 | Somers | Steven | M | UT | US | 4 | Bear, The 100M 2025 (36 hours) |
| 102774 | Somers | Thomas | M | NJ | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 125926 | Somerville | Christian | M | Dubai | AE | 1 | Transjeju by UTMB 107km 2025 (25 hours) |
| 121225 | Somerville | Luke | M | South Australia | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 110502 | Sommerville | Matthew | M | NSW | AU | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 127743 | Son | Tran Hoai | M | hanoi | VN | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 101267 | Sondergaard | Flemming | M | SK | CA | 2 | Black Canyon 100km 2025 (17 hours) † |
| 124000 | Sondermann | Shane | M | BC | CA | 1 | Fat Dog 120M 2025 (48 hours) † |
| 102848 | Song | Qi | F | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 122246 | Soole | Cain | M | Wellington | NZ | 2 | Taupo 100km 2025 (17 hours) |
| 126184 | Soprano | Travis | M | PA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 125910 | Sorecau | Catalin | M | BN | RO | 1 | Transgrancanaria 125km 2025 (28 hours) |
| 100950 | Sorensen | Christian | M | UT | US | 8 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 118313 | Sorenson | Erik | M | CO | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 105211 | Soriano | Franco | M | CA | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 124634 | Soroka | Nathaniel | M | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 104093 | Soryte | Julija | F | OR | US | 16 | Georgia Death Race 74M 2025 (24 hours) † |
| 127021 | SOSA | CARLOS | M | CA | US | 1 | Saddles 100M 2025 (34 hours) † |
| 107497 | sosa | jose | M | Baja | MX | 8 | Cocodona 250M 2025 (125 hours) |
| 123901 | Soudee | Thierry | M | NY | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 110906 | Soudunsaari | Jaakko | M | Lappi | FI | 8 | Zugspitz 106km 2025 (25 hours) |
| 100654 | Soukup | David | M | MN | US | 128 | South Downs Way 100M 2025 (30 hours) |
| 107055 | Sousa | Pedro | M | Leiria | PT | 64 | Mozart by UTMB 119km 2025 (23 hours) |
| 124550 | Southard | Jake | M | WA | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 104531 | Sowa | Angie | F | CO | US | 4 | No Business 100M 2025 (34 hours) |
| 114744 | Spackman | Amanda | F | NSW | AU | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 102323 | Spagnol | Remo | M | TX | US | 16 | Vermont 100M 2025 (30 hours) |
| 104541 | Spakowicz | Dan | M | OH | US | 128 | Cruel Jewel 106M 2025 (48 hours) † |
| 100883 | Spalek | Viktor | M | CA | US | 128 | Black Canyon 100km 2025 (17 hours) † |
| 124228 | Spangler | Daniel | M | TX | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 118507 | Spangler | Suzie | F | MD | US | 4 | Bear, The 100M 2025 (36 hours) † |
| 106354 | Spannuth | John | M | WA | US | 16 | Cascade Crest 100M 2025 (34 hours) |
| 124513 | Sparks | Casey | M | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 108391 | Sparks | Sidney | M | CA | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 113058 | spaulding | luke | M | alabama | US | 8 | Umstead 100M 2025 (30 hours) |
| 102555 | Spaulding | Tim | M | VA | US | 1 | Western States 100M 2025 (30 hours) † |
| 124244 | Speake | Gregory | M | MD | US | 1 | Worlds End 100km 2025 (19 hours) |
| 110198 | Spears | ANGELA | F | TX | US | 16 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 111960 | Spears | Matt | M | TX | US | 8 | HOKA Bandera 100km 2025 (17 hours) |
| 125913 | Speck | Josef Jeffrey | M | Zürich | CH | 1 | Swiss Canyon Trail 111km 2025 (24 hours) |
| 117845 | Speckman | Heath | M | Colorado | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 125557 | Speirs | Ashley | F | NV | US | 1 | Saddles 100M 2025 (34 hours) † |
| 124034 | Speirs | John | M | Ayrshire | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 127015 | Spence | Lauren | F | TX | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 111376 | Spencer | Adrian | M | Maryland | US | 8 | Grindstone by UTMB 100km 2025 (18 hours) |
| 123820 | Spencer | Emily | F | Virginia | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 124787 | Spencer | Nathan | M | MO | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 126083 | Sperandio | Stefano | M | Treviso | IT | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125539 | Sperlich | Jens | M | Sachsen-Anhalt | DE | 1 | Zugspitz 100M 2025 (48 hours) |
| 105169 | Sperry | Megan | F | CA | US | 32 | San Diego 100M 2025 (32 hours) † |
| 114706 | Sperry | Sandra | F | Washington | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 125121 | Sperry | Tony | M | TN | US | 1 | Mamba 100M 2024 (34 hours) † |
| 117256 | Spiteri | Derek | M | Michigan | US | 4 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 126405 | Spitzer | Mark | M | Hertfordshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 114431 | Spix | Bernard | M | Hawaii | US | 8 | Canal Corridor 100M 2025 (30 hours) † |
| 105049 | Spognardi | Emily | F | OR | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 123506 | Spread | Robert | M | East Sussex | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 114860 | Springer | Chris | M | VA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 107719 | Springer | Jian | F | CA | US | 16 | Angeles Crest 100M 2025 (36 hours) † |
| 110301 | Squellati | Connor | M | Oregon | US | 2 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 121236 | Squirrell | Zachary | M | Suffolk | GB | 2 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 119557 | Sreenath | Sandeep | M | Victoria | AU | 2 | Surf Coast Century 100km 2025 (17 hours) |
| 127178 | Sriram | Siddharth | M | WA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 122884 | St Charles | Aden | F | TN | US | 2 | No Business 100M 2025 (34 hours) |
| 108762 | St John | Jon | M | UT | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 102643 | St Julian | Chase | M | AB | CA | 16 | Lost Soul Ultra 100km 2025 (21 hours) |
| 106575 | St Laurent | Alissa | F | AB | CA | 8 | Run Rabbit Run 100M 2025 (36 hours) † |
| 118447 | St-Cyr | Xavier | M | QUÉBEC | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 125188 | St-Jean | Audrey | F | QC | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 114390 | St-Louis | Charles | M | QC | CA | 8 | Fat Dog 120M 2025 (48 hours) |
| 127635 | St-Onge | Antoine | M | Québec | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 100278 | St. Amand | Jennifer | F | MN | US | 4 | Hennepin 100M 2025 (30 hours) † |
| 113089 | St. Germain | Jarrod | M | CA | US | 8 | Cascade Crest 100M 2025 (34 hours) |
| 124017 | St. John | Paul | M | New York | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 109682 | Staats | Wayne | M | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 121306 | Stabel | Florian | M | Hessen | DE | 2 | Transgrancanaria 125km 2025 (28 hours) |
| 126878 | Stace | Ed | M | CA | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 114990 | Stachowski | Timothy | M | TN | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 114176 | Stack | John | M | South Lanarkshire | GB | 8 | Transgrancanaria 125km 2025 (28 hours) |
| 115878 | Stack | Margaret | F | CA | US | 2 | San Diego 100M 2025 (32 hours) † |
| 111347 | Stacy | Adam | M | MO | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 102292 | Stadelman | Dennis | M | NY | US | 16 | No Business 100M 2025 (34 hours) |
| 126225 | Stadnicki | Matthew | M | Illinois | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 112862 | Staehle | Andreas | M | baden württemberg | DE | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 126009 | Staelgraeve | Tom | M | West-vlaanderen | BE | 1 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 123068 | Stafford | Carrie | F | Colorado | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 104743 | Stagg | Antony | M | GBR | GB | 1 | Western States 100M 2025 (30 hours) |
| 101672 | Stahala | Martin | M | DEU | DE | 64 | Mozart by UTMB 119km 2025 (23 hours) |
| 110368 | Ståhlkloo | Anna | F | Dalarna | SE | 16 | Canyons by UTMB 100M 2025 (35 hours) |
| 116707 | Stahlman | Brad | M | OK | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 122645 | Stailey | Nick | M | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 103326 | Staker | Marcus | M | AUS | AU | 32 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 119806 | Stallard | Chris | M | East Sussex | US | 2 | North Downs Way 100M 2025 (30 hours) |
| 103261 | Stalnaker | Wendy | F | CO | US | 128 | Leona Divide 100km 2025 (17 hours) |
| 119107 | Stalnecker | Jeremy | M | CA | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 125705 | Stammer | Uwe | M | Sachsen-Anhalt | DE | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 100304 | Stamp | Trem | M | AUS | AU | 16 | Canadian Death Race 118km 2025 (24 hours) |
| 117953 | Stancescu | Radu | M | OR | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 118532 | Stancik | Juraj | M | Slovakia | SK | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125664 | Standifer | Caitlin | F | CO | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) |
| 120082 | Standish | Liesl | F | CO | US | 2 | Zion 100M 2025 (36 hours) † |
| 104392 | Standring | Brett | M | AUS | AU | 32 | Mt Fuji 100M 2025 (46 hours) |
| 120454 | Stanek | Matthew | M | SC | US | 2 | Hellgate 100km 2024 (17 hours) |
| 106249 | Stanford | Sean | M | VA | US | 64 | Vermont 100M 2025 (30 hours) |
| 108490 | Stangbye | Patrick | M | Oslo | NO | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 115399 | Stangl | Josef | M | Praha | CZ | 4 | Letecka Stovka 104km 2025 (21 hours) |
| 103907 | Stanis | Nadia | F | CA | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 123792 | Stanley | Jonathan | M | WA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) |
| 121430 | Stapley | Jason | M | Ontario | CA | 2 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 107961 | Stark | Angela | F | CA | US | 2 | Sedona Canyons 125M 2025 (52 hours) |
| 102473 | Stark | Jürgen | M | DEU | DE | 4 | Istria by UTMB 168km 2025 (46 hours) |
| 120467 | Starko | Vsevolod | M | BW | DE | 2 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 125109 | Starnes | Bradley | M | Tennessee | US | 1 | Mamba 100M 2024 (34 hours) † |
| 121071 | Starnes | Leslie | F | WV | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 109016 | Starodaj | Tom | M | CT | US | 8 | Vermont 100M 2025 (30 hours) |
| 101047 | Starostka | Andy | M | NV | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 114723 | Starr | Jamie | M | Haute Garonne | FR | 4 | Swiss Alps 100M 2025 (50 hours) |
| 124352 | Starr | Michael | M | OR | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 126766 | Stasulli | Dominique | F | CO | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 115625 | Staten | Alex | F | AR | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 127852 | STAVAUX | Edouard | M | FR | US | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 126104 | Stavness | Evan | M | CA | US | 1 | Sean O'Brien 100km 2025 (17 hours) † |
| 117001 | Stayner | KC | M | TX | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 118732 | Stear | Matthew | M | Devon | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 113447 | Steblin | Alexej | M | Hessen | DE | 4 | Zugspitz 100M 2025 (48 hours) |
| 115387 | steedman | tom | M | New South Wales | AU | 2 | Guzzler Ultra 100km 2025 (24 hours) |
| 125178 | Steel | Nicholas | M | MN | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 109889 | Steele | Toby | M | Queensland | AU | 4 | Cocodona 250M 2025 (125 hours) |
| 113334 | Steelman | Andrew | M | Illinois | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 110440 | Steen | Mikko | M | Helsinki | FI | 8 | Nuts Ylläs Pallas 100km 2025 (22 hours) |
| 124146 | Steenhuis | Peter | M | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 126385 | Steens | Luc | M | Brabant Wallon | BE | 1 | Hardrock 100M 2025 (48 hours) † |
| 124306 | Steer | Janet | F | Western Cape | ZA | 1 | Ultra-Trail Cape Town 100M 2024 (45 hours) |
| 116838 | Stefanile | Antonio | M | Ontario | CA | 2 | Superior 100M 2025 (38 hours) † |
| 119743 | Stefenel Grouillard | Simon | M | Haute Garonne | FR | 2 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 107688 | stegen | kevin | M | AL | US | 8 | Cruel Jewel 106M 2025 (48 hours) † |
| 100289 | Stegura | Michael | M | PA | US | 16 | Brazos Bend 100M 2024 (32 hours) |
| 119534 | Stehling | Thomas | M | Hessen | DE | 2 | Zugspitz 106km 2025 (25 hours) |
| 111326 | Steidler | Adam | M | OR | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 104616 | Steigmeyer | Zak | M | CA | US | 16 | IMTUF 100M 2025 (36 hours) † |
| 120531 | Stein | Sam | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 105201 | Steinberg | Jason | M | CO | US | 32 | Hardrock 100M 2025 (48 hours) † |
| 124733 | Steindl | Martin | M | Salzburg | AT | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 105365 | Steinhauser | Maria | F | CA | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 107917 | Steinhibel | Jon | M | MN | US | 2 | Superior 100M 2025 (38 hours) † |
| 124059 | Steinkellner | Thomas | M | Steiermark | AT | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 117147 | Steinmann | Sandro | M | Lucerne | CH | 4 | SwissPeaks 170km 2025 (58 hours) |
| 103738 | Steinmeister | Martin | M | DEU | DE | 8 | Zugspitz 100M 2025 (48 hours) |
| 122305 | Stemart | Charles | M | France | US | 1 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 108515 | Stemberger | Andreas | M | Niederösterreich | AT | 8 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 109283 | Stenger | David | M | KY | US | 16 | Mohican 100M 2025 (32 hours) |
| 102607 | Stenner | Christian | M | AB | CA | 64 | Canadian Death Race 118km 2025 (24 hours) |
| 126986 | Stenqvist | Viktor | M | Jämtland | SE | 1 | Łemkowyna Ultra-Trail 150km 2025 (35 hours) |
| 101570 | Stephan | Eric | M | CO | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 122886 | STEPHANE | VINOT | M | FRANCE | FR | 2 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 124567 | Stephany | Daniel | M | Wisconsin | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 116979 | Stephens | Chris | M | NSW | AU | 4 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 125439 | Stephens | Derek | M | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 125697 | Stephens | DesArae | F | Arizona | US | 1 | Cocodona 250M 2025 (125 hours) |
| 124461 | Stephens | Lisa | F | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 126816 | Stern | Emily | F | California | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 104504 | Stern | Jeffrey | M | California | US | 16 | Run Rabbit Run 100M 2025 (36 hours) † |
| 100982 | Steurer | Steffen | M | AUT | AT | 32 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 123295 | Stevanovic | Mia | F | Oregon | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 120931 | Stevenin | Elia | M | Aosta | IT | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 118243 | Stevens | Annette | F | TN | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 107737 | Stevens | Bryan | M | AZ | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 127014 | Stevens | Michael | M | MD | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 127496 | Stevens | Phil | M | KY | US | 1 | No Business 100M 2025 (34 hours) |
| 107561 | Stevens | Stephanie | F | MI | US | 2 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 121361 | Stevenson | Alyssia | F | UT | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 126250 | Stevenson | Danny | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 126157 | STEVENSON | ERIC | M | WY | US | 1 | Bear, The 100M 2025 (36 hours) |
| 121179 | Stevick | Joseph | M | WA | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 127896 | Stewart | Andrew | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 124782 | Stewart | Bob | M | PA | US | 1 | Eastern States 100M 2025 (36 hours) |
| 111660 | Stewart | Brian | M | NY | US | 2 | Eastern States 100M 2025 (36 hours) |
| 123076 | Stewart | Chase | F | Maryland | US | 2 | Twisted Branch 100km 2025 (20 hours) |
| 124522 | Stewart | Kelli | F | TX | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 108649 | Stewart | Kevin | M | CA | US | 8 | Hood Hundred 100M 2025 (34 hours) |
| 121213 | Stewart | Liam | M | Victoria | AU | 2 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 124918 | Stewart | Matthew | M | UT | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 110901 | Stewart | Megan | F | California | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 126196 | Stewart | Patrick | M | CO | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 127065 | Stewart | Patrick | M | Victoria | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 118299 | Stewart | Paul | M | OR | US | 2 | Mountain Lakes 100M 2025 (30 hours) † |
| 105270 | Stewart | Steven | M | ON | CA | 64 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 123418 | Stewart | Tom | M | Indiana | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 107063 | Stichman | Tad | M | MT | US | 64 | Crazy Mountain 100M 2025 (36 hours) † |
| 117759 | Stickel | Federico | M | IM | IT | 1 | Western States 100M 2025 (30 hours) † |
| 116676 | Stickels | Leah | F | HI | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 124589 | Stiebling | Max | M | Thuringia | DE | 1 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 127875 | Stier | Sebastian | M | Bavaria | DE | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 126238 | Stilley | Everett | M | Oregon | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 126680 | Stilwell | Rob | M | VIC | AU | 1 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 124006 | Stimpfle | Johannes | M | Bavaria | DE | 1 | Grossglockner UltraTrail 110km 2025 (28 hours) |
| 115828 | Stimson | Patrick | M | CO | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 102598 | Stinchfield | David | M | WA | US | 32 | Bigfoot 206M 2025 (100 hours) † |
| 121048 | Stinnett | Parker | M | California | US | 2 | San Diego 100M 2025 (32 hours) † |
| 119606 | Stirrat | Thomas | M | Washington | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 110007 | Stitt | Thomas | M | CA | US | 16 | Sean O'Brien 100km 2025 (17 hours) † |
| 121659 | Stocker | John | M | England - Oxfordshire | GB | 2 | West Highland Way 95M 2025 (30 hours) |
| 124134 | Stockmann | Erik | M | Mützens 11a | AT | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 113316 | Stoddard | Kaitlyn | F | CO | US | 2 | Bighorn 100M 2025 (35 hours) |
| 111387 | Stofko | Andrea | F | UT | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 100383 | Stofko | Paul | M | IN | US | 64 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 123246 | Stoker | Benjamin James | M | New York | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 118160 | Stoker | Quentin | M | CO | US | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 100633 | Stokes | Sean | M | CA | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 127456 | Stolarski | Maciej | M | Mazovia | PL | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 120560 | Stone | Benjamin | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 115741 | Stone | Dawn | F | AZ | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 114289 | Stone | Jamie | M | CA | US | 8 | Zion 100km 2025 (19 hours) |
| 102633 | Stone | Mark | M | AUS | AU | 1 | Western States 100M 2025 (30 hours) † |
| 111238 | Stone | Patrick | M | VA | US | 8 | Umstead 100M 2025 (30 hours) |
| 112156 | Stonebraker | Stephanie | F | Texas | US | 8 | Cruel Jewel 106M 2025 (48 hours) † |
| 114970 | Stoneham | Evan | M | MI | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 117679 | Storey | Mark | M | Queensland | AU | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 109521 | Storm | Julieann | F | Ca | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 125105 | Stouffer | Stephen | M | CO | US | 1 | Never Summer 100km 2025 (23 hours) |
| 103683 | Stougaard | Bent | M | DNK | DK | 16 | Tuscany Crossing 103km 2025 (21 hours) |
| 121627 | Stover | Bryan | M | IN | US | 2 | No Business 100M 2025 (34 hours) |
| 114212 | Stow | Samuel | M | QLD | AU | 8 | Buffalo Stampede 100km 2025 (23 hours) |
| 101138 | Strack | Jonathan | M | CA | US | 8 | Bear, The 100M 2025 (36 hours) † |
| 127819 | Straghan | Peter | M | Hawkes Bay | NZ | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 123597 | Strain | Scott | M | Oregon | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 100790 | Strand | Eric | M | MO | US | 32 | Hennepin 100M 2025 (30 hours) † |
| 122239 | Strand | Jackson | M | MT | US | 2 | Crazy Mountain 100M 2025 (36 hours) † |
| 116510 | Strange | Jeremy | M | Canterbury | NZ | 4 | Zion 100M 2025 (36 hours) |
| 124377 | Strange | Wyatt | M | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 111604 | Stratan | Ihor | M | New York | US | 8 | Vermont 100M 2025 (30 hours) |
| 116448 | Stratton | Daniel | M | NSW | AU | 4 | Tarawera by UTMB 100M 2025 (36 hours) |
| 118425 | Straub | Simon | M | Tirol | AT | 4 | Istria by UTMB 110km 2025 (24 hours) |
| 125528 | Strazdina- Jaunzema | Agnese | F | Cesu Aprinkis | LV | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 124043 | Streatfield | Jamie | M | United Kingdom (England) | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 107066 | Streeter | Chris | M | 8 | Canyons by UTMB 104km 2025 (20 hours) | ||
| 111410 | Stretton | Alan | M | Co. Tyrone | IE | 8 | Zugspitz 106km 2025 (25 hours) |
| 124683 | Strickland | Karin | F | NC | US | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 103795 | Strickland | Peter | M | GA | US | 64 | Tunnel Hill 100M 2024 (30 hours) † |
| 114229 | Strickland | Robert | M | CO | US | 8 | Indiana 100M 2025 (30 hours) |
| 119539 | Striegel | Sara | F | CO | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 124760 | Stringer | Michael | M | OR | US | 1 | Pine to Palm 100M 2025 (34 hours) |
| 104417 | Stringer | Scott | M | SC | US | 8 | Georgia Death Race 74M 2025 (24 hours) † |
| 100078 | Strong | Jonathan | M | Leicestershire | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 108306 | Stroud | Aaron | M | NC | US | 16 | Miwok 100km 2025 (15:30:59 hours) |
| 122564 | Stroud | Tiffany | F | AB | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 110202 | Struck | Dalton | M | UT | US | 4 | Superior 100M 2025 (38 hours) † |
| 101294 | Struck | Jared | M | PA | US | 4 | Laurel Highlands 70.5M 2025 (20 hours) |
| 120993 | Struck | Robert | M | MA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 104911 | Struck | Scott | M | MI | US | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 126061 | Strum | Kate | F | ID | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 124247 | Strzelecki | Graham | M | DC | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 100070 | Stuart | David | M | GBR | GB | 8 | South Downs Way 100M 2025 (30 hours) |
| 119960 | Stuart | Ian | M | CO | US | 2 | Cascade Crest 100M 2025 (34 hours) |
| 109856 | Stuart | Rory | M | CA | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 125048 | Stucky | Josh | M | TX | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 101152 | Study | Matthew | M | OH | US | 16 | Twisted Branch 100km 2025 (20 hours) † |
| 115028 | Stuhl | Matthias | M | Bavaria | DE | 4 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 102434 | Stull | Travis | M | NZL | NZ | 64 | Taupo 100km 2025 (17 hours) |
| 115539 | Stulman | Amy | F | VA | US | 4 | Laurel Highlands 70.5M 2025 (20 hours) |
| 107460 | Stummvoll | Alexander | M | Baden-Württemberg | DE | 16 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 125205 | Sturges | Brandon | M | Oregon | US | 1 | Waldo 100km 2025 (18 hours) † |
| 101190 | Styer | Andrew | M | PA | US | 16 | Laurel Highlands 70.5M 2025 (20 hours) |
| 122847 | Styrak | Jozef | M | Zilinsky kraj | SK | 2 | Krakonosova Stovka 100km 2025 (22 hours) |
| 126608 | Styskal | Eric | M | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 114943 | SU | SHIQIANG | M | British Columbia | CA | 4 | Black Canyon 100km 2025 (17 hours) † |
| 103858 | Subbaraman | Ram | M | CA | US | 8 | Rio Del Lago 100M 2025 (30 hours) |
| 117649 | Subbiah | Stalin | M | California | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 120762 | Subido | Paco | M | Renfrewshire | GB | 2 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 hours) |
| 126574 | Such | Arkadiusz | M | Podkarpacie | PL | 1 | Salomon Ultra-Trail Hungary 112km 2025 (20 hours) |
| 124994 | Suchan | Kirsten | F | Alberta | CA | 1 | Black Canyon 100km 2025 (17 hours) † |
| 127497 | Suchanek | Peter | M | Middlesex | GB | 1 | Letecka Stovka 104km 2025 (21 hours) |
| 106405 | Suchey | Alex | M | CA | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 123359 | Suchy | Karl | M | OH | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 122829 | Suczewski | Adam | M | California | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 117491 | Suda | Yuta | M | Tokyo | JP | 4 | Shinetsu Five Mountains Trail 110km 2025 (22 hours) |
| 127571 | Šudý | Marián | M | Slovakia | SK | 1 | Letecka Stovka 104km 2025 (21 hours) |
| 123613 | Suello | Kik Russel | M | Zamboanga Peninsula | PH | 1 | Hardcore Ultra Trail (HUT) 100M 2025 (44 hours) |
| 124104 | Suemitsu | Emily | F | Montana | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 115563 | Sugata | Etsuko | F | Fukuoka | JP | 4 | HOKA Chiang Mai Thailand by UTMB Trans-Int 160 175km 2024 (48 hours) |
| 100268 | Sugianto | Rini | F | IDN | ID | 1 | Western States 100M 2025 (30 hours) † |
| 127660 | Suh | Seung woo | M | Seoul | KR | 1 | Transjeju by UTMB 150km 2025 (37 hours) |
| 124846 | Sukey | Heather | F | Ohio | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 112794 | Sukhbaatar | Tuvshintugs | M | California | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 118155 | Sukut | Brian | M | MT | US | 4 | Beaverhead 100km 2025 (20 hours) |
| 121581 | Šulík | Pavol | M | Slovenská republika | SK | 2 | Letecka Stovka 104km 2025 (21 hours) |
| 121617 | Sullivan | Allison | F | NH | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 113135 | Sullivan | Danforth | M | Massachusetts | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 121618 | Sullivan | Daniel | M | NH | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 107807 | Sullivan | David | M | GA | US | 16 | No Business 100M 2025 (34 hours) |
| 109995 | Sullivan | Mandy | F | WV | US | 2 | Rim to River 100M 2025 (32 hours) |
| 124907 | Sullivan | Matt | M | Devon | GB | 1 | Thames Path 100M 2025 (30 hours) |
| 123580 | Sullivan | Michael | M | CO | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 121759 | Sullivan | Michael | M | NSW | AU | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 107950 | Sullivan | Nigel | M | Buckinghamshire | GB | 16 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 121343 | Sullivan | Ted | M | CO | US | 2 | Never Summer 100km 2025 (23 hours) |
| 107946 | Sullivan | Todd | M | IN | US | 16 | Cruel Jewel 106M 2025 (48 hours) † |
| 116449 | Sullivan | Tommy | M | Nevada | US | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 118087 | Sumerford | Shannon | F | AL | US | 4 | Pinhoti 100M 2025 (32 hours) |
| 125476 | Sumimoto | Yuichi | M | Kyoto | JP | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 109308 | Summerford | Helen | F | MS | US | 4 | Pinhoti 100M 2025 (32 hours) † |
| 112968 | Summers | Bryant | M | OH | US | 4 | Tunnel Hill 100M 2024 (30 hours) † |
| 119959 | Summers | Marci | F | Illinois | US | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 104668 | Sun | Chengwu | M | CHN | CN | 4 | Ninghai Ultra Trail 109km 2025 (24 hours) |
| 125273 | Sun | Eric | M | Ontario | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 126946 | Sun | Kanghong | M | CA | US | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 125687 | Sun | Li | M | MA | US | 1 | Vermont 100km 2025 (17 hours) |
| 127004 | Sunday | Chadwick | M | OH | US | 1 | Indiana 100M 2025 (30 hours) |
| 126016 | Sundby | Harald | M | Bærum | NO | 1 | Burning River 100M 2025 (30 hours) |
| 107443 | Sunder | Kaushik | M | CALIFORNIA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 100911 | Sundermeier | Ronda | F | OR | US | 8 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 121861 | Sundgren | Johan | M | Copenhagen | DK | 2 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 122085 | Sung | Ricky | M | Taipei | TW | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 109150 | supino | gianluca | M | italy | IT | 8 | Pine to Palm 100M 2025 (34 hours) † |
| 119111 | Suplick | Stuart | M | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 117856 | Suppinger | Jeffrey | M | TN | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 101068 | Surgent | Peter | M | CO | US | 64 | Zion 100M 2025 (36 hours) † |
| 107934 | Surman | Melissa | F | Ohio | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 124744 | Surowy | Gary | M | Thüringen | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 123961 | Susicky | Jan | M | Prague | CZ | 1 | Krakonosova Stovka 100km 2025 (22 hours) |
| 102497 | Sustersic | Nathan | M | OR | US | 128 | Hood Hundred 100M 2025 (34 hours) |
| 123869 | Sutammajarn | Rakchanok | F | Suratthani | TH | 1 | HOKA Chiang Mai Thailand by UTMB Trans-Int 160 175km 2024 (48 hours) |
| 125575 | Sutcliffe | Kelly | F | HI | US | 1 | Bighorn 100M 2025 (35 hours) |
| 115802 | Sutcliffe | Kristen | F | OH | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 122752 | Sutherland | Kirsty | F | Queensland | AU | 2 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 122368 | Sutherland | Marc | M | VIC | AU | 2 | Surf Coast Century 100km 2025 (17 hours) |
| 124362 | Sutphin | Alicia | F | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 123968 | Sutter | Andre | M | Zürich | US | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 127406 | Sutyak | Mark | M | WV | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 125827 | SUZUKI | AKIHIRO | M | Ibaraki | JP | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 111434 | SUZUKI | AKIRA | M | NSW | AU | 8 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 102425 | Suzuki | Hideyuki | M | CA | US | 32 | Canyons by UTMB 100M 2025 (35 hours) |
| 125731 | SUZUKI | TATSUYA | M | 埼玉県 | JP | 1 | Mt Fuji 100M 2025 (46 hours) |
| 101757 | Svab | Hubert | M | CZE | CZ | 2 | Krakonosova Stovka 100km 2025 (22 hours) |
| 113973 | Svajgr | Jeff | M | NE | US | 4 | Hennepin 100M 2025 (30 hours) † |
| 118563 | Svensson | Per | M | Stockholm | SE | 4 | Nuts Ylläs Pallas 100km 2025 (22 hours) |
| 119676 | Swade | Judy | F | NC | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 125757 | Swadling | Bryan | M | NSW | AU | 1 | Blackall 100km 2025 (18 hours) |
| 122075 | Swain | Brian | M | Georgia | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 124549 | Swain | Rachel | F | Georgia | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 124901 | Swalberg | Ken | M | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 123625 | Swallow | Rob | M | Oregon | US | 1 | Pine to Palm 100M 2025 (34 hours) |
| 110137 | Swankaert | Thomas | M | Oost-Vlaanderen | BE | 8 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 125996 | Swann | Kyle | M | GA | US | 1 | Pinhoti 100M 2025 (32 hours) |
| 126135 | Swanson | Devlin | M | California | US | 1 | Cuyamaca 100km 2025 (17 hours) |
| 101735 | Swanson | John | M | NJ | US | 4 | Hennepin 100M 2025 (30 hours) † |
| 124917 | Swanson | Mathew | M | MA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125339 | Swanson | Rory | M | New South Wales | AU | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 100281 | Swart | Jaco | M | Kent | GB | 16 | South Downs Way 100M 2025 (30 hours) |
| 107968 | Swavely | Meghan | F | CA | US | 4 | San Diego 100M 2025 (32 hours) † |
| 116429 | Swayze | Jetson | M | CO | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 123834 | Swearingen | Kimberly | F | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 124192 | Sweeney | Adam | M | OH | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 107919 | Sweeney | Jesse | M | Mi | US | 8 | Saddles 100M 2025 (34 hours) † |
| 105982 | Sweeney | Jim | M | NY | US | 16 | Hennepin 100M 2025 (30 hours) † |
| 109733 | Swenson | Laura | F | AZ | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 121027 | Swenson | Mike | M | CA | US | 2 | Leona Divide 100km 2025 (17 hours) |
| 100544 | Swiatkowski | Keith | M | CA | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 122518 | Swift | Abigail | F | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 123458 | Swiger | Marquez | M | OR | US | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 104863 | Swindle | Paul | M | FL | US | 2 | Pinhoti 100M 2025 (32 hours) † |
| 121355 | Sworske | Paul | M | WI | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 105277 | Swyers | Brenton | M | VA | US | 2 | Laurel Highlands 70.5M 2025 (20 hours) |
| 127237 | Sykes | Mel | F | West Yorkshire | US | 1 | Lakeland 100M 2025 (40 hours) |
| 115569 | Sylvain | Aaron | M | New Hampshire | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 118583 | Sylvain | Marco | M | Québec | CA | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 127894 | Synan | Nicholas | M | NY | US | 1 | Hellgate 100km 2024 (17 hours) |
| 127293 | Syndergaard | elijah | M | UT | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 124965 | SYPEL | SYLWESTER | M | ILLINOIS | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 103129 | Syse | Bjorn | M | FL | US | 16 | Cascade Crest 100M 2025 (34 hours) |
| 112824 | Syster | Jeff | M | Pennsylvania | US | 8 | Laurel Highlands 70.5M 2025 (20 hours) |
| 127475 | Szabo | Kyle | M | TN | US | 1 | No Business 100M 2025 (34 hours) |
| 124355 | Szew | Sophie | F | California | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 110789 | Szustak | Steve | M | Brussels | BE | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 123860 | Tabusse | Florian | M | Gard | FR | 1 | Grand Raid Ventoux by UTMB 124km 2025 (30 hours) |
| 103161 | Tachibana | Hayanari | M | Kanagawa | JP | 16 | FunTrails Chichibu & Okumusashi 105km 2024 (30 hours) |
| 107645 | Tacker | Daniel | M | Texas | US | 16 | Crazy Mountain 100M 2025 (36 hours) † |
| 113183 | Tadajewski | Anthony | M | Arizona | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 127058 | Taggard | Tyler | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 121305 | Taggart | Cody | M | TN | US | 2 | No Business 100M 2025 (34 hours) |
| 113498 | Tagliabue | Andrea | M | Italia | IT | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 107074 | Tajan | Joey | M | CA | US | 4 | Waldo 100km 2025 (18 hours) † |
| 119441 | Takabatake | Norihiro | M | Tokyo | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 121034 | Takacs | Joel | M | PA | US | 2 | Grindstone by UTMB 100M 2025 (36 hours) |
| 127200 | Takagi | Youhei | M | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) |
| 102831 | Takahashi | Nobuya | M | CA | US | 16 | Bigfoot 206M 2025 (100 hours) † |
| 125559 | takahashi | shinya | M | Tokyo | JP | 1 | Mt Fuji 100M 2025 (46 hours) |
| 105387 | Takahashi | Tomohiko | M | Tokyo | JP | 8 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 125320 | Takahashi | Yusuke | M | Tokyo | JP | 1 | Mt Fuji 100M 2025 (46 hours) |
| 111613 | Takai | Shirena | M | Tochigi | JP | 8 | Okushinano 100km 2025 (21 hours) |
| 123681 | Takai | Takafumi | M | MA | US | 1 | Cuyamaca 100km 2025 (17 hours) |
| 116019 | TAKASAO | Hisato | M | Tokyo | JP | 4 | Mt Fuji 100M 2025 (46 hours) |
| 106225 | Takeda | Nobuyori | M | NJ | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 117799 | TAKEUCHI | KAZUHISA | M | SAIWAI | JP | 4 | HOKA Chiang Mai Thailand by UTMB Trans-Int 160 175km 2024 (48 hours) |
| 112892 | TAKUMA | HIDEO | M | Tokyo | JP | 16 | Okushinano 100km 2025 (21 hours) |
| 127183 | Talbot | Gilbert | M | Québec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 105153 | Talbott | Shawn | M | UT | US | 32 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 106231 | Talhelm | Alan | M | CA | US | 32 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 117285 | Talisesky | Brandon | M | New York | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 125159 | Talkington | Spenser | M | PA | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 120190 | talkington | tyler | M | Colorado | US | 2 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 109762 | Tallis | Matthew | M | Queensland | AU | 8 | Tarawera by UTMB 100M 2025 (36 hours) |
| 125308 | Tallmann | Joanna | F | Rheinland-Pfalz | DE | 1 | Zugspitz 100M 2025 (48 hours) |
| 117009 | Tamai | Ryo | M | Tokyo | JP | 4 | HURT 100M 2025 (36 hours) † |
| 115446 | Tamchyna | Petr | M | Prague | CZ | 4 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 126620 | Taminger | Mia | F | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 107248 | tampe | stefan | M | NV | US | 16 | Hood Hundred 100M 2025 (34 hours) |
| 113257 | TAMURA | KAHEI | M | kochi-pref | JP | 8 | OSJ Ontake 100M 2025 (24 hours) |
| 119338 | Tan | Hong Yew Brandon | M | Melaka | MY | 2 | Malaysia Ultra Trail by UTMB 100km 2024 (26 hours) |
| 107106 | Tan | Natacha | F | NSW | AU | 16 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 125601 | Tan | Seng-Lai | M | MA | US | 1 | Vermont 100M 2025 (30 hours) |
| 104486 | Tanaka | Hiroyasu | M | JPN | JP | 4 | HURT 100M 2025 (36 hours) † |
| 103963 | Tanaka | Mark | M | CA | US | 128 | Brazos Bend 100M 2024 (32 hours) |
| 118945 | TANAKA | NAOKI | M | Miyagi-ken | JP | 4 | Massanutten 100M 2025 (36 hours) † |
| 126551 | Tandathu | Zukie | M | Bedfordshire | GB | 1 | Swiss Alps 100M 2025 (50 hours) |
| 120064 | Tang | Daolin | M | TX | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 103016 | Tang | Jianshan | M | PA | US | 1 | Western States 100M 2025 (30 hours) † |
| 127800 | Tang | Jingyan | F | Hubei | CN | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 104665 | Tang | Le | M | CHN | CN | 64 | Ninghai Ultra Trail 109km 2025 (24 hours) |
| 126523 | Tang | Stephanie | F | CT | US | 1 | Umstead 100M 2025 (30 hours) |
| 126465 | Tang | Weijiang | M | TX | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 114574 | TANG | YING | F | ILE DE FRANCE | FR | 4 | Scenic Trail 130km 2025 (38 hours) |
| 110504 | Tangney | James | M | California | US | 16 | Rio Del Lago 100M 2025 (30 hours) |
| 125692 | Tanguay | Ali | F | CO | US | 1 | Swiss Alps 100M 2025 (50 hours) |
| 103763 | Tanguy | Audrey | F | FRA | FR | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 106408 | Tani | Yukio | M | JPN | JP | 16 | OSJ Ontake 100km 2025 (20 hours) |
| 121277 | Tanimoto | Kentaro | M | Chiba | JP | 2 | Shinetsu Five Mountains Trail 110km 2025 (22 hours) |
| 126232 | Tannas | Darren | M | British Columbia | CA | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 113465 | Tannenbaum | Sara | F | MA | US | 2 | Vermont 100M 2025 (30 hours) |
| 109834 | Tanner | Dylan | M | Colorado | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 119985 | Tanner | Jason | M | PA | US | 2 | Laurel Highlands 70.5M 2025 (20 hours) |
| 103162 | Tanner | Jonathan | M | Colorado | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 124300 | Tant | Joe | M | Greater Manchester | GB | 1 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 124243 | Taradash | Gwenyth | F | MA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 127001 | Tardy | Loïc | M | Savoie | FR | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 119051 | Tarras | Andrea | F | BC | CA | 4 | HURT 100M 2025 (36 hours) † |
| 114960 | Tarver | Matthew | M | Texas | US | 4 | Dinosaur Valley 100km 2024 (22 hours) |
| 117123 | Tarzia | Alessandro | M | MI | IT | 2 | Morenic Trail 119km 2025 (22 hours) |
| 124600 | Tate | Derrick | M | England | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 118373 | Tate | Evie | F | Montana | US | 2 | Crazy Mountain 100M 2025 (36 hours) † |
| 126655 | Tatum | Eric | M | Florida | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 124295 | taussig | Derek | M | KS | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 115085 | Tavares | Eduardo | M | Portugal | PT | 4 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 124265 | Tawil | Tiare | F | NM | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 127520 | Taylor | Adam | M | SC | US | 1 | Zion 100M 2025 (36 hours) |
| 125541 | Taylor | April | F | NM | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 108167 | Taylor | Bernadette | F | NJ | US | 16 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 125768 | Taylor | Carrie | F | AZ | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 126256 | Taylor | Catherine | F | California | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 120465 | Taylor | Christopher | M | Tennessee | US | 2 | Mamba 100M 2024 (34 hours) † |
| 125866 | Taylor | Derek | M | Vermont | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 126609 | Taylor | Grant | M | Berkshire | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 109897 | Taylor | Jack | M | Wrexham | GB | 16 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 106304 | Taylor | Jake | M | IA | US | 64 | Cuyamaca 100km 2025 (17 hours) † |
| 124684 | Taylor | Jennifer | F | NC | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 122734 | Taylor | Jordan | M | LA | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 102144 | Taylor | Joseph | M | UT | US | 32 | Hennepin 100M 2025 (30 hours) † |
| 126147 | Taylor | Lance | M | NM | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 113914 | Taylor | Mary | F | Tennessee | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 108385 | Taylor | Matthew | M | TX | US | 8 | Arkansas Traveler 100M 2025 (30 hours) |
| 117931 | Taylor | Melissa | F | Iowa | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 124082 | Taylor | Mike | N | TN | US | 1 | No Business 100M 2025 (34 hours) |
| 111498 | Taylor | Murray | M | Auckland | NZ | 8 | Taupo 100km 2025 (17 hours) |
| 126647 | Taylor | Nathan | M | BC | CA | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 107516 | Taylor | Nick | M | AZ | US | 16 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 109265 | Taylor | Ricky | M | Qld | AU | 2 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 104974 | Taylor | Ryan | M | PA | US | 8 | Bear, The 100M 2025 (36 hours) † |
| 102693 | Taylor | Wing | M | BC | CA | 128 | Fat Dog 100km 2025 (24 hours) |
| 116755 | Tazik | Jacob | M | Colorado | US | 2 | Never Summer 100km 2025 (23 hours) |
| 114840 | Teabo | Daniel | M | New York | US | 4 | Twisted Branch 100km 2025 (20 hours) † |
| 123861 | Teague | Lindsay | F | Georgia | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 105588 | Tedore | Ben | M | NV | US | 8 | IMTUF 100M 2025 (36 hours) † |
| 107392 | Teege | Tim | M | Hamburg | DE | 8 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 124474 | Teeples | John | M | GA | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 112670 | Teeters | Rebecca | F | Ca | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 124279 | Tegeler | Luke | M | OR | US | 1 | Waldo 100km 2025 (18 hours) † |
| 121029 | TEIJEIRO LÓPEZ | PABLO | M | A Coruña | ES | 2 | Penyagolosa 106km 2025 (26 hours) |
| 125951 | Telford | Paul | M | Suffolk | GB | 1 | Valleys Ultra (13) 180km 2025 (46.5 hours) |
| 116885 | Teller | Niko | M | Pa | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 114964 | Tello | Christopher | M | OR | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 115620 | Tello | Tobias | M | CT | US | 4 | Quebec Mega Trail 135km 2025 (32 hours) |
| 120695 | Tellwright | Sunny | N | California | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 123866 | Telnov | Alexander | M | Moscow | RU | 1 | Golden Ring 100km 2025 (18 hours) |
| 121166 | Temprano | Anthony | M | CA | US | 2 | Zion 100M 2025 (36 hours) † |
| 120512 | TENEBRUSO | GIANCARLO | M | California | US | 2 | Cuyamaca 100km 2025 (17 hours) |
| 126638 | Teng | Ma | M | Zhejiang | CN | 1 | Transjeju by UTMB 107km 2025 (25 hours) |
| 123954 | Tennant | Jake | M | UT | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 107991 | Teo | Alan | M | OR | US | 8 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 111437 | Teo | Annie | F | Singapore | SG | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 125265 | Teo | Daryl | M | AZ | US | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 100650 | Terabayashi | Takashi | M | JPN | JP | 2 | FunTrails Chichibu & Okumusashi 105km 2024 (30 hours) |
| 126293 | Terada | Jin | M | São Paulo | BR | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 104591 | Teragawa | Shane | M | CA | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 126473 | Teran | Gus | M | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 125751 | Terruzzi | Agustin | M | Cordoba | AR | 1 | Ultra Trail Amanecer Comechingón 120km 2025 (32 hours) |
| 108237 | Terry | Kevin | M | Wisconsin | US | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124588 | Terry | Leonard | M | Auckland | NZ | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 122484 | Tesche | Michael | M | Lower Saxony | DE | 2 | Zugspitz 100M 2025 (48 hours) |
| 126443 | Tesson | Baptiste | M | Quebec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 127920 | Testoff | Addison | M | MD | US | 1 | Tahoe 202M 2025 (100 hours) |
| 127918 | Testoff | Thomas | M | MD | US | 1 | Tahoe 202M 2025 (100 hours) |
| 101840 | Tetreault | Myron | M | AB | CA | 256 | Tarawera by UTMB 102km 2025 (17 hours) |
| 124130 | Teubert | Wyatt | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 119541 | Teuri | Tuomas | M | Uusimaa | FI | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 116819 | Textor Murray | Theodora | F | MA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 110105 | Thai | Haa Cheng | F | CA | US | 16 | Leona Divide 100M 2025 (33 hours) † |
| 110349 | Thenaisie | Mathias | M | Bretagne | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 103201 | Theodosis | Dennis | M | HKG | HK | 2 | Hong Kong 100K 100km 2025 (23 hours) |
| 101421 | Theofanides | Kiriakos | M | NY | US | 8 | Grindstone by UTMB 100km 2025 (18 hours) |
| 120075 | Theofanides | Marissa | F | NY | US | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 125861 | Theule | Kyle | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 124716 | Thibault | Roche | M | Haute garonne | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 123353 | Thibaut | Christophe | M | Hauts-de-Seine | FR | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 115997 | Thielmann | Jeremy | M | Alberta | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 122336 | Thieme | Ben | M | CO | US | 2 | Never Summer 100km 2025 (23 hours) |
| 122697 | Thier | Dominik | M | Poland | PL | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 113652 | Thierens | Liam | M | QLD | AU | 8 | Guzzler Ultra 100km 2025 (24 hours) |
| 103157 | Thiessen | Patrick | M | CO | US | 2 | Zion 100km 2025 (19 hours) |
| 104788 | Thill | Mark | M | IN | US | 64 | Bighorn 100M 2025 (35 hours) |
| 127586 | THIVIERGE | SIMON | M | QC | CA | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 121891 | Thivolle | Remi | M | Ile de France | FR | 2 | Trail du Saint-Jacques by UTMB 130km 2025 (28 hours) |
| 108422 | Thoburn | Chris | M | Ca | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 124712 | Thomas | Alex | M | New York | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 124087 | Thomas | Andrew | M | Lancashire | GB | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 112279 | Thomas | Anne | F | MT | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 114834 | Thomas | Chris | M | NC | US | 4 | Umstead 100M 2025 (30 hours) |
| 124422 | Thomas | Christina | F | Co | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 104775 | Thomas | Christophe | M | BEL | BE | 4 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 101022 | Thomas | Christopher | M | NV | US | 256 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127474 | Thomas | Connor | M | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 119020 | Thomas | Dane | M | UT | US | 2 | Beaverhead 100km 2025 (20 hours) |
| 105311 | Thomas | Ed | M | SD | US | 4 | Hennepin 100M 2025 (30 hours) † |
| 100847 | Thomas | Fabrice | M | FRA | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 118267 | Thomas | Gaudinaud | M | 3 Rue de la Fontaine Pleureuse | FR | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 101051 | Thomas | Hilary | F | AB | CA | 128 | Fat Dog 100km 2025 (24 hours) |
| 120060 | Thomas | Jesse | M | CO | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 115581 | Thomas | Kyle | M | CO | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 107343 | thomas | luke | M | CA | US | 8 | Brazil 150M 2025 (70 hours) |
| 127889 | Thomas | Misti | F | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 117232 | Thomas | Nicole | F | BC | CA | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 104435 | Thomas | Preston | M | PA | US | 1 | Western States 100M 2025 (30 hours) † |
| 114095 | Thomas | Staci | F | TN | US | 2 | No Business 100M 2025 (34 hours) |
| 124879 | Thomas | Zachary | M | CO | US | 1 | Bighorn 100M 2025 (35 hours) |
| 120653 | Thomison | Brandon | M | CA | US | 2 | HURT 100M 2025 (36 hours) † |
| 108190 | Thompson | Aaron | M | NH | US | 8 | Vermont 100M 2025 (30 hours) |
| 112732 | Thompson | Adam | M | TN | US | 8 | IMTUF 100M 2025 (36 hours) † |
| 120214 | Thompson | Ben | M | SD | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 112446 | Thompson | Cary | M | OR | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127917 | Thompson | Clifford | M | Colorado | US | 1 | Never Summer 100km 2025 (23 hours) |
| 111835 | THOMPSON | DAN | M | Kent | GB | 2 | Thames Path 100M 2025 (30 hours) |
| 115029 | Thompson | David | M | Hertfordshire | US | 2 | South Downs Way 100M 2025 (30 hours) |
| 119247 | Thompson | David | M | CA | US | 2 | Sean O'Brien 100km 2025 (17 hours) † |
| 126270 | Thompson | Emily | F | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 124339 | Thompson | Jason | M | BC | CA | 1 | Gorge Waterfalls 100km 2025 (18 hours) |
| 107453 | Thompson | Jeff | M | California | US | 16 | Miwok 100km 2025 (15:30:59 hours) |
| 111280 | Thompson | Jeremy | M | Kentucky | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 109859 | Thompson | Joel | M | California | US | 16 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126063 | Thompson | John | M | Texas | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 124457 | Thompson | Kyle | M | Oregon | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 115451 | Thompson | Kyle | M | IL | US | 4 | Hennepin 100M 2025 (30 hours) † |
| 107684 | Thompson | Lauren | F | Colorado | US | 4 | Hood Hundred 100M 2025 (34 hours) |
| 111464 | Thompson | Matt | M | NSW | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 103605 | Thompson | Matthew | M | AUS | AU | 64 | Guzzler Ultra 100km 2025 (24 hours) |
| 120223 | Thompson | Maxwell | M | NY | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 116992 | Thompson | Nathan | M | CA | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 121806 | Thompson | Nicholas | M | NY | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 125367 | Thompson | Robert | M | Warwickshire | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 125488 | Thompson | Silas | M | North Carolina | US | 1 | Umstead 100M 2025 (30 hours) |
| 102557 | Thompson | Skye | M | CA | US | 32 | Miwok 100km 2025 (15:30:59 hours) |
| 109849 | Thompson | Trey | M | Ga | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 127724 | Thompson | Tyler | M | OR | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 126776 | Thompson-Martinez | Daniel | M | UT | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 104764 | Thoms | Don | M | NE | US | 64 | Leadville Trail 100M 2025 (30 hours) |
| 112743 | Thomsen | Amy | F | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 103394 | Thomsen | Scott | M | CA | US | 128 | Fat Dog 120M 2025 (48 hours) † |
| 117680 | thomson | barbara | F | CA | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 101366 | Thomson | Eric | M | VA | US | 1 | Vermont 100M 2025 (30 hours) |
| 113422 | Thomson | Jason | M | Utah | US | 8 | Bear, The 100M 2025 (36 hours) † |
| 122263 | Thomson | Mark | M | Kent | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 119170 | Thomson | Matthew | M | City of Cape Town | ZA | 4 | Ultra-Trail Cape Town 100M 2024 (45 hours) |
| 114974 | Thomson | Nicholas | M | Oregon | US | 4 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 117099 | Thongjib | Krisada | M | Lampang | TH | 4 | Chiangmai by UTMB Elephant 100km 2024 (22 hours) |
| 102094 | Thorley | Jared | M | UT | US | 64 | Wasatch Front 100M 2025 (36 hours) † |
| 108374 | Thorn | Caitlin | F | Al | US | 2 | Eastern States 100M 2025 (36 hours) |
| 125663 | Thornborrow | Samuel | M | Herts | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 126183 | Thorne | Brian | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 120369 | Thorne | Jedediah | M | California | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 125888 | thornhill | corey | M | california | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 111608 | Thornton | Colin | M | Rauma | NO | 4 | Hardrock 100M 2025 (48 hours) † |
| 125142 | Thornton | Mary Frances | F | GA | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 124642 | Thornton | Ryan | M | TX | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 122261 | Thorp | Stephen | M | NY | US | 2 | Vermont 100M 2025 (30 hours) |
| 103953 | Thorpe | Ryan | M | NJ | US | 256 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 101765 | Thorvaldsson | Peter | M | SWE | SE | 1 | Western States 100M 2025 (30 hours) † |
| 110617 | Thouin | John | U | MD | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 127477 | Thouin | Maddie | F | Colorado | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 122083 | Throolin | Michael | N | UT | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 104400 | Thrune | Barry | M | WI | US | 8 | Tunnel Hill 100M 2024 (30 hours) † |
| 113344 | Thuener | Jason | M | OH | US | 8 | Rim to River 100M 2025 (32 hours) † |
| 126240 | Tian | Changbin | M | NY | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 121962 | Tibbs | Hugh | M | London | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 123588 | Tickner | Phil | M | County Durham | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 103816 | Tidd | Bill | M | NH | US | 8 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 104869 | Tidd | John | M | Madrid | ES | 2 | Hardrock 100M 2025 (48 hours) † |
| 125051 | Tidmore | Cole | M | TX | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 113819 | Tidmore | Paul | M | TX | US | 4 | C & O Canal 100M 2025 (30 hours) † |
| 102433 | Tiedens | Mark (George) | M | CA | US | 512 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 123857 | Tielidze | David | M | Tbilisi | GE | 1 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 hours) |
| 100187 | Tiemann | Max | M | NC | US | 64 | Hellbender 100M 2025 (40 hours) † |
| 107481 | Tien | David | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 126522 | Tieri | Brent | M | MN | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 111688 | Tierney | Edward | M | Idaho | US | 8 | Bighorn 100M 2025 (35 hours) |
| 112329 | Tierney | Paul | M | Ballina, Co. Tipperary | IE | 8 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 111561 | Tiete | Andreas | M | Bavaria | DE | 8 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125411 | Tietz | Patrick | M | Nordrhein-Westfalen | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 102397 | Tighe | Tom | M | NY | US | 2 | Hellgate 100km 2024 (17 hours) |
| 123647 | Tigue | Patrick | M | KY | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126604 | tikusis | martin | M | Wisconsin | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 124898 | Tilbe | Tom | M | Cumbria | GB | 1 | Transgrancanaria 125km 2025 (28 hours) |
| 127348 | Tiller | Austin | M | NC | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 126381 | Timm | Baby | N | Oregon | US | 1 | Cascade Crest 100M 2025 (34 hours) |
| 125613 | Timm | Tyler | N | Minnesota | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 105334 | Timme | Ryan | M | UT | US | 32 | Beaverhead 100km 2025 (20 hours) |
| 102207 | Timmerman | Brad | M | CA | US | 16 | Leona Divide 100km 2025 (17 hours) |
| 108083 | Tinch | Lee | M | TN | US | 16 | No Business 100M 2025 (34 hours) |
| 111610 | Tincher | Clayton | M | Indiana | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 109375 | Tiner | Jeremy | M | AR | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 125777 | Tio | Jacob | M | Wisconsin | US | 1 | Superior 100M 2025 (38 hours) † |
| 127756 | TIPHENE | Guillaume | M | Midi-Pyrénées | FR | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126265 | Tipling | Nick | M | North Island | NZ | 1 | Taupo 100km 2025 (17 hours) |
| 125300 | Tirol | Amanda | F | HI | US | 1 | HURT 100M 2025 (36 hours) |
| 112685 | Tischler | Jen | F | IA | US | 8 | Zion 100km 2025 (19 hours) |
| 126349 | Tiwari | Abhishek | M | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 119978 | Tixier | Jean-Christophe | M | Ile de France | FR | 2 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 102460 | Tkaczyk | Rafal | M | GBR | GB | 32 | South Downs Way 100M 2025 (30 hours) |
| 124345 | Tneh | Wah Ching | M | Selangor | MY | 1 | Scott TMBT 109km 2025 (30 hours) |
| 124844 | Tobon | Jorge | M | On | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 125362 | Todd | David | M | North Yorkshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 102276 | Todd | Kenneth | M | NC | US | 32 | Hennepin 100M 2025 (30 hours) † |
| 118505 | Todorov | Radoslav | M | Sofia | BG | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 116224 | Todzo | Quinn | M | California | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 118811 | Toews | Steve | M | British Columbia | US | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 119419 | Togher | Jake | M | Auckland | NZ | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 122444 | Tohkairin | Saki | F | Gifu | JP | 2 | Lake Biwa 100M 2025 (52 hours) |
| 125611 | Toivio | Antto | M | - | FI | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 124803 | Tollett | Darryl | M | NSW | AU | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 116286 | Tolmie | David | M | Glasgow | GB | 4 | West Highland Way 95M 2025 (30 hours) |
| 120363 | Tolsma | Maria | F | New Jersey | US | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 107913 | Toma | Lukas | M | Tirol | AT | 4 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 108614 | Tomal | Sarah | F | CA | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 123500 | Tomas | Luis-Miguel | M | California | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 123719 | Tomashuk | Timothy | M | Ohio | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 126280 | Tomaszewski | Jeff | M | CA | US | 1 | Kettle Moraine 100M 2025 (30 hours) |
| 116790 | Tomchaney | Michael | M | Arizona | US | 4 | Cuyamaca 100km 2025 (17 hours) |
| 101208 | Tomey | Jeff | M | GA | US | 4 | Georgia Death Race 74M 2025 (24 hours) † |
| 117097 | Tomida | Shogo | M | JPN | JP | 4 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 123856 | Tomilov | Viktor | M | Novosibirsk Oblast | RU | 1 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 122233 | Tomkies | Robert | M | New South Wales | AU | 2 | Surf Coast Century 100km 2025 (17 hours) |
| 122967 | Tomlinson | Nick | M | South Carolina | US | 2 | Pinhoti 100M 2025 (32 hours) † |
| 107749 | Tomlinson | Sam | M | London | GB | 16 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 119668 | Tompkins | Nathan | M | NC | US | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 125027 | Toms | Dave | M | NC | US | 1 | Cocodona 250M 2025 (125 hours) |
| 127119 | Toner | Christopher | M | Co. Donegal | IE | 1 | Istria by UTMB 168km 2025 (46 hours) |
| 127428 | Tong | Matthew | M | Hong Kong | HK | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 111826 | Tongco | Bradley | M | DC | US | 8 | Grindstone by UTMB 100km 2025 (18 hours) |
| 113636 | Toolan | Zar | M | MO | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 111447 | Toole | Robby | M | Geneva | CH | 4 | Swiss Alps 100M 2025 (50 hours) |
| 107969 | Tootell | Simon | M | Northamptonshire | GB | 16 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 108311 | Topete Jr | Jesus | M | California | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 123896 | Topkaraoğlu | Abdülkadir | M | İstanbul | TR | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 103718 | Topping | Chelsey | F | AB | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 109218 | Toribio | Felipe | M | NY | US | 16 | Canyons by UTMB 100M 2025 (35 hours) |
| 107855 | Torkelson | Cory | M | TX | US | 8 | Leadville Trail 100M 2025 (30 hours) |
| 111579 | Toro | Bryan | M | NJ | US | 2 | Eastern States 100M 2025 (36 hours) |
| 106015 | Torres | Adrian | M | CA | US | 32 | Hardrock 100M 2025 (48 hours) † |
| 125134 | Torres | Alejandro | M | AZ | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 120586 | Torres | Jason | M | New Jersey | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 118489 | Torres | Jorge | M | Ca | US | 4 | Cuyamaca 100km 2025 (17 hours) † |
| 118430 | Torres | Xavier | M | Barcelona | ES | 4 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 117423 | Torres Martinez | Domingo | M | Dublin | IE | 2 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 120009 | Torres-Peña | Ernesto | N | VA | US | 2 | C & O Canal 100M 2025 (30 hours) † |
| 125420 | Tortolano | Christopher | M | Scotland | GB | 1 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 105576 | Toscano | John | M | NH | US | 16 | Vermont 100km 2025 (17 hours) |
| 126597 | Toth | William | M | Va | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 116855 | Totoki | Yoshiaki | M | Fukuoka | JP | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 126185 | Touet | Kyle | M | SK | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 109098 | TOULEMONT | Christian | M | Aquitaine | FR | 8 | Grand Raid des Pyrénées - Tour de Cirques 123km 2025 (40 hours) |
| 127909 | Tournon | Pablo | M | NRW | DE | 1 | Autumn 100M 2025 (28 hours) |
| 111726 | TOUTAIN | Patrick | M | SAONE ET LOIRE | FR | 2 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 119133 | Towle | Katie | F | TX | US | 2 | Sean O'Brien 100km 2025 (17 hours) † |
| 114624 | Townley | John | M | WA | US | 2 | Mountain Lakes 100M 2025 (30 hours) † |
| 126778 | Townley | Kent | M | GA | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 125788 | Townley | Walter | M | WA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 116117 | Townsend | Ben | M | CA | US | 4 | Cuyamaca 100km 2025 (17 hours) † |
| 121629 | Townsley | Chris | M | PA | US | 2 | Laurel Highlands 70.5M 2025 (20 hours) |
| 103209 | Trach | Dana | F | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 103059 | Trach | Roman | M | CA | US | 32 | Fat Dog 120M 2025 (48 hours) † |
| 116048 | tracy | patrick | M | California | US | 4 | Angeles Crest 100M 2025 (36 hours) † |
| 108435 | Traer | Scott | M | MA | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 103138 | Tramleasure | Steve | M | AZ | US | 8 | Zion 100M 2025 (36 hours) † |
| 124126 | Tramutola | Jared | M | NJ | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 122538 | Tran | Hai Ly | F | QLD | AU | 2 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 120672 | Tran | Hung | M | CA | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 115055 | Tran | Kevin | M | TX | US | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 127372 | Tran | Quang Thuy | M | Hanoi | VN | 1 | Chiangmai by UTMB Elephant 100km 2024 (22 hours) |
| 115157 | Tran | Sang | M | Ho chi minh | VN | 2 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 124467 | Tran | Timothee | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126977 | Tran | Tuyet Mai | F | Hồ Chí Minh | VN | 1 | Malaysia Ultra Trail by UTMB 100km 2024 (26 hours) |
| 108292 | Tranqui | Phil | M | AL | US | 16 | Arkansas Traveler 100M 2025 (30 hours) |
| 113392 | Trapp | Gregory | M | Ohio | US | 8 | Massanutten 100M 2025 (36 hours) † |
| 122727 | Traub | Wes | M | MA | US | 2 | Beaverhead 100km 2025 (20 hours) |
| 121973 | Traud | Justin | M | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 127631 | Trautman | Sarah | F | Oregon | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 121249 | TRAVELLA | Eric | M | Bourgogne | FR | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 109356 | Travers | Jean-Michel | M | BY | DE | 8 | Grossglockner UltraTrail 110km 2025 (28 hours) |
| 124541 | Travis | Adam | M | GA | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 115864 | Travnicek | Katherine | F | Nevada | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 107731 | Traynor | Adam | M | WI | US | 4 | Superior 100M 2025 (38 hours) |
| 127066 | TREDAN | BRIEUC | M | Bretagne | FR | 1 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 116828 | Tregear | Rochelle | F | NSW | AU | 4 | Buffalo Stampede 100km 2025 (23 hours) |
| 124124 | Treignier | Jerome | M | QC | CA | 1 | Black Canyon 100km 2025 (17 hours) † |
| 103760 | Tremblay | Adam | M | NB | CA | 2 | Javelina Jundred 100M 2025 (30 hours) |
| 101865 | Tremblay | Marie-Claude | F | QC | CA | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 124736 | Tremblay | Veronique | F | Quebec | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 124344 | Trembley | Jack | M | IL | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 108889 | Tremps | Claudia | F | Catalunya | ES | 8 | Mozart by UTMB 119km 2025 (23 hours) |
| 112386 | Trenidad | Michaela | F | WA | US | 4 | Bigfoot 206M 2025 (100 hours) |
| 123655 | Trenkwalder | Andreas | M | Austria | AT | 1 | Zugspitz 106km 2025 (25 hours) |
| 101722 | Trent | Katie | F | NV | US | 16 | Wasatch Front 100M 2025 (36 hours) † |
| 117889 | TRENTANI | LAURA | F | PIEMONTE | IT | 4 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 124226 | Trepin | Nicolas Alberto | M | Córdoba | AR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 105961 | Tresise | Danny | M | ON | CA | 8 | Sulphur Springs 100M 2025 (30 hours) |
| 123282 | Treuil | Hugo | M | Loire | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 115793 | Trexler | Brad | M | Oh | US | 2 | Dinosaur Valley 100km 2024 (22 hours) |
| 100666 | Triconnet | Thierry | M | FRA | FR | 32 | Azores Trail Run (Whalers' Great Route) 118km 2025 (26 hours) |
| 123877 | Trieger | Joanna | F | NV | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 119549 | Trieger | Morgan | M | Nevada | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 107477 | Trimboli | Brendan | M | CO | US | 16 | Run Rabbit Run 100M 2025 (36 hours) † |
| 126216 | Trimm | Logan | M | LA | US | 1 | Brazos Bend 100M 2024 (32 hours) |
| 102888 | Trinh | Linda | F | ON | CA | 128 | Sulphur Springs 100km 2025 (18 hours) |
| 127381 | Trinh | Ngoc Lien | F | Hanoi | VN | 1 | Transjeju by UTMB 150km 2025 (37 hours) |
| 116980 | Triplett | Spencer | M | Colorado | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 124756 | Tripp | Alex | M | NY | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124268 | Tripp | Joseph | M | Colorado | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 124682 | Trissel | Laura | F | VA | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 105869 | Trnavsky | Bobby | M | OH | US | 8 | Burning River 100M 2025 (30 hours) |
| 121649 | Trobrillant | Ruddy | M | VAL DE MARNE | FR | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 115643 | Troglia | Enea Stefano | M | TO | IT | 4 | Ultra Trail Vipava Valley 165km 2025 (46 hours) |
| 111966 | Trokey | Liz | F | Arizona | US | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 126954 | Trolinder | Carson | M | TX | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 126932 | Tropper | James | M | Colorado | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 125786 | Trottier | Pierre-luc | M | Quebec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 126198 | Trottman | Paul | M | NC | US | 1 | Umstead 100M 2025 (30 hours) |
| 123799 | Trout | Jordan | M | PA | US | 1 | Worlds End 100km 2025 (19 hours) |
| 122818 | Troutman | Brian | M | California | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 105307 | Troxel | Steve | M | TN | US | 4 | Tunnel Hill 100M 2024 (30 hours) † |
| 107466 | Troyer | Kevin | M | OH | US | 4 | Eastern States 100M 2025 (36 hours) |
| 106084 | Trubow | Adam | M | NM | US | 8 | Leadville Trail 100M 2025 (30 hours) |
| 112191 | Truccone | Giorgio | M | Torino | IT | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 117426 | Truckenbrod | Nate | M | WI | US | 2 | Pinhoti 100M 2025 (32 hours) † |
| 104933 | True | Wahsatch | M | UT | US | 16 | Wasatch Front 100M 2025 (36 hours) |
| 104468 | Truelove | John | M | IN | US | 8 | Indiana 100M 2025 (30 hours) |
| 124172 | Truett | Colman | M | MA | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 110203 | Trujillo | Alberto | M | CA | US | 8 | Quicksilver 100km 2025 (17 hours) † |
| 127693 | Trujillo | Hernando | M | Bogotá | CO | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125473 | Trumbauer | Chris | M | Maryland | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 100613 | Trumbo | Chad | M | OH | US | 1 | Western States 100M 2025 (30 hours) |
| 104712 | Trundley | Tony | M | GBR | GB | 2 | West Highland Way 95M 2025 (30 hours) |
| 117916 | Tsai | Lynn | F | CA | US | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 127556 | Tsai | Wen Shin | F | Taiwan | TW | 1 | Mt Fuji 100M 2025 (46 hours) |
| 125749 | Tsang | Sarah | F | Alberta | CA | 1 | Leadville Trail 100M 2025 (30 hours) |
| 120903 | Tse | Chit Ming | F | Somerset | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 127808 | TSENG | WEICHIEH | M | Taiwan | TW | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124739 | TSUBAKI | KENICHI | M | AZ | US | 1 | FunTrails Chichibu & Okumusashi 105km 2024 (30 hours) |
| 127230 | TSUJI | MAYUKO | F | saitama | JP | 1 | Lake Biwa 100M 2025 (52 hours) |
| 113225 | Tsuji | Paul | M | California | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 126271 | Tu | Jianfeng | M | Singapore | SG | 1 | TransLantau Ultra Trail by UTMB 100km 2024 (28 hours) |
| 122832 | TUAN ISMAIL | TUAN HAFANDI | M | Selangor | MY | 1 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 121023 | Túbal | Sónia | F | Lisboa | PT | 2 | Patagonia 110km 2025 (27 hours) |
| 114063 | Tucci | Tiffany | F | NC | US | 2 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 107086 | Tucker | Alexander | M | 32 | Bighorn 100M 2025 (35 hours) | ||
| 123313 | Tucker | Jen | F | TN | US | 2 | No Business 100M 2025 (34 hours) |
| 110344 | Tucker | Kevin | M | PA | US | 4 | Mountain Lakes 100M 2025 (30 hours) |
| 101296 | Tucker | Melissa | F | OR | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 101203 | Tucker | Tim | M | CA | US | 32 | Canyons by UTMB 104km 2025 (20 hours) |
| 125647 | Tuja | Eduardo Francisco | M | Ciudad Autónoma de Buenos Aires | AR | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 120745 | Tulk | John | M | Tasmania | US | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 125082 | Tullis | Liz (Elizabeth) | F | KY | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 107087 | Tulloch | Ken | M | Nevada | US | 64 | Rio Del Lago 100M 2025 (30 hours) |
| 111542 | Tulloch | Tyler | M | CT | US | 4 | Vermont 100M 2025 (30 hours) |
| 127975 | Tully | Jamie | F | Il | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 119494 | Tumaliuan | Richard | M | Manila | PH | 2 | Taupo 100km 2025 (17 hours) |
| 127276 | Tumavicus | John | M | MD | US | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 126197 | Tung | James | M | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 127747 | TUNG | MENGYUN | F | Taiwan | TW | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 104170 | Tunney | Phillip | M | GBR | GB | 4 | South Downs Way 100M 2025 (30 hours) |
| 125322 | Tuohy | Morgan | M | California | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 127272 | Turbe | Laura | F | MD | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 114571 | Turgeon | Dany | M | Quebec | CA | 8 | Quebec Mega Trail 135km 2025 (32 hours) |
| 123786 | Turi | Rachel | F | Utah | US | 1 | Superior 100M 2025 (38 hours) |
| 103224 | Turley | Richard | M | CA | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 125710 | Turner | Andrew | M | MN | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 101870 | Turner | Brendan | M | GBR | GB | 64 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 109373 | Turner | Brian | M | Michigan | US | 16 | Sulphur Springs 100km 2025 (18 hours) |
| 123572 | Turner | Camille | F | UT | US | 1 | Zion 100km 2025 (19 hours) |
| 120651 | Turner | David | M | Gloucestershire | GB | 2 | Thames Path 100M 2025 (30 hours) |
| 115690 | Turner | Jessica | F | AZ | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 125774 | Turner | Katie | F | Scotland | GB | 1 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 124237 | Turner | Kevan | M | CA | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 107948 | Turner | Levi | M | Victoria | AU | 4 | Surf Coast Century 100km 2025 (17 hours) |
| 101710 | Turner | Mike | M | CA | US | 128 | Black Canyon 100km 2025 (17 hours) † |
| 126952 | Turner | Nathan | M | NC | US | 1 | Bigfoot 206M 2025 (100 hours) † |
| 116760 | Turner | Tanya | F | Idaho | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 124609 | Turner | Tiffany | F | OH | US | 1 | No Business 100M 2025 (34 hours) |
| 124636 | Tutt | Marko | M | Harjumaa | EE | 1 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 120523 | Tutterow | Eric | M | Colorado | US | 2 | Bighorn 100M 2025 (35 hours) |
| 110989 | Tuttle | Gary | M | Berkshire | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 111946 | Tuuk | Evan | M | Texas | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 101619 | Tweed | Geoffrey | M | NM | US | 128 | San Diego 100M 2025 (32 hours) |
| 110268 | Twigg | Charles | M | OH | US | 16 | Cuyamaca 100km 2025 (17 hours) † |
| 121993 | Twitchell | Arnold | M | ME | US | 2 | Black Canyon 100km 2025 (17 hours) |
| 127991 | Tyler | Claire | F | Utah | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) |
| 105868 | Tyler | Lucas | M | AZ | US | 64 | Cuyamaca 100km 2025 (17 hours) † |
| 100596 | Tyler | Mike | M | OR | US | 8 | Georgia Death Race 74M 2025 (24 hours) † |
| 106141 | Tyllsmark | Andreas | M | SWE | SE | 16 | SwissPeaks 360km 2025 (156 hours) |
| 124707 | Tyrrell-Davis | Ben | M | WA | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 124697 | Tyrrell-Davis | Cassie | F | WA | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 112988 | Tyson | Brandon | M | GA | US | 8 | No Business 100M 2025 (34 hours) |
| 115909 | Tyson | Drew | M | Georgia | US | 2 | No Business 100M 2025 (34 hours) |
| 107089 | Tyson | Kris | M | CO | US | 128 | Crazy Mountain 100M 2025 (36 hours) † |
| 126376 | Tzeng | Liru | F | xxx | TW | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 104882 | Ucelli | Robin | M | FRA | FR | 2 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 114103 | Uchida | Saiko | F | California | US | 8 | San Diego 100M 2025 (32 hours) † |
| 123769 | Udkow | Jonathan | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 123405 | uehara | koji | M | Fukuoka | JP | 1 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 126297 | Uehara Martins | Rafael | M | São Paulo | BR | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124110 | Uehira | Shin | M | Tokyo | JP | 1 | Mt Fuji 100M 2025 (46 hours) |
| 125547 | Uemura | Osamu | M | MA | US | 1 | Vermont 100km 2025 (17 hours) |
| 120781 | Uhrin | Bohumil | M | Slovakia | SK | 2 | Letecka Stovka 104km 2025 (21 hours) |
| 124277 | Ujvari | Daniel | M | Saxony-Anhalt | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 124419 | Ukasick | Korbyn | F | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 110817 | Ulatowski | Andrzej | M | kujawsko-pomorskie | PL | 8 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 123492 | Ülker | Başar Necdet | M | İstanbul | TR | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 117962 | Ulmer | Ben | M | Ms | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 105212 | Ulrich | George | M | OR | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 102865 | Ulrich | Lindsey | F | OR | US | 64 | Canyons by UTMB 100M 2025 (35 hours) |
| 126659 | Ulrich | Phillip | M | MO | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 126105 | Ulsnes | Sigrid Sundby | F | London | GB | 1 | Thames Path 100M 2025 (30 hours) |
| 111439 | ULSNES | Steinar | M | Norway | NO | 2 | Thames Path 100M 2025 (30 hours) |
| 105376 | Umehara | Hiroyuki | M | JPN | JP | 8 | OSJ Ontake 100M 2025 (24 hours) |
| 116101 | Underhill | Noah | M | IN | US | 4 | Indiana 100M 2025 (30 hours) |
| 104757 | Ung | Tek | F | RI | US | 32 | Vermont 100M 2025 (30 hours) |
| 120941 | Ungethüm | Thomas | M | Saxony | DE | 2 | Zugspitz 100M 2025 (48 hours) |
| 125252 | Unrein II | Douglas | M | OR | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 124726 | Unszorg | Patrik | M | Bavaria | DE | 1 | Salomon Ultra-Trail Hungary 112km 2025 (20 hours) |
| 122244 | Unthank | Matt | M | Texas | US | 2 | Never Summer 100km 2025 (23 hours) |
| 122591 | Uny | Nicolas | M | France | FR | 2 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 126830 | Upton | Pedro | M | Surrey | GB | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 125446 | URBAN | JOSEPH | M | PA | US | 1 | Zion 100M 2025 (36 hours) † |
| 126093 | Urbaniak | Greg | M | IL | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 104183 | Urbaník | Martin | M | SVK | SK | 2 | Letecka Stovka 104km 2025 (21 hours) |
| 101049 | Urbanski | Jeffrey | M | CO | US | 1 | Western States 100M 2025 (30 hours) † |
| 101712 | Urbanski | Matthew | M | CO | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 116920 | Ureña | Esteban | M | Desamparados | CR | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 120294 | Ureña | Nicholas | M | Fl | US | 2 | No Business 100M 2025 (34 hours) |
| 118602 | uribe | angel | M | CA | US | 4 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 103204 | Urken | Steven | M | GA | US | 16 | Hennepin 100M 2025 (30 hours) † |
| 126448 | Urquhart | Gordon | M | Ayrshire | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 113429 | Ursem | Carling | F | CA | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 127056 | Ussery | Jon | M | Georgia | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 105050 | Ussery | Meridith | F | GA | US | 16 | Bighorn 100M 2025 (35 hours) |
| 115207 | Utsunomiya | Hitoshi | M | Tokyo | JP | 4 | Mt Fuji 100M 2025 (46 hours) |
| 124810 | Vaca | Chris | M | WA | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 123537 | Vaidyanathan | Vasanth | M | WA | US | 1 | Cascade Crest 100M 2025 (34 hours) |
| 122678 | Vail | Tim | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 127114 | Vaillard | Guillermo | M | British Columbia | CA | 1 | Black Canyon 100km 2025 (17 hours) † |
| 121625 | Vainauskas | Julius | M | MA | US | 2 | Puerto Vallarta by UTMB 147km 2024 (35 hours) |
| 124886 | Valaika | Margo | F | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 106481 | Valcke | Mathias | M | BEL | BE | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 126949 | Valdez | Aaron | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 127057 | Valdez | Ryan | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 111510 | Vale | Pete | M | Worcestershire | GB | 8 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 106342 | Valek | Petr | M | CZE | CZ | 2 | Letecka Stovka 104km 2025 (21 hours) |
| 116663 | Valencia | Favian | M | WA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 105357 | Valentin Austin | Simone | F | FL | BR | 8 | Crazy Mountain 100M 2025 (36 hours) † |
| 125515 | Valentine | Dominick | M | ID | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 126412 | Valentine | Mark | M | West Sussex | GB | 1 | North Downs Way 100M 2025 (30 hours) |
| 110948 | Valentine | Zachary | M | OH | US | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 102162 | Valenzona | Damon | M | CA | US | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124202 | Valerio | Hannah | F | MT | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 101410 | Valites | Mark | M | NY | US | 1 | Western States 100M 2025 (30 hours) |
| 114582 | Valle | Fabrizio | M | Torino | IT | 4 | Morenic Trail 119km 2025 (22 hours) |
| 127633 | Vallejo | Jose | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126548 | Vallejo | Maria | F | Pichincha | EC | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 111731 | Vallez | John | M | MN | US | 4 | Superior 100M 2025 (38 hours) |
| 111748 | Valone | Frank | M | CA | US | 8 | Canyons by UTMB 100M 2025 (35 hours) |
| 120205 | Van Abbema | Zachary | M | ID | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 118276 | Van Acker | Leif | M | Oregon | US | 4 | Cascade Crest 100M 2025 (34 hours) |
| 112219 | van Casteren | Lisa | F | California | US | 4 | Mountain Lakes 100M 2025 (30 hours) † |
| 123757 | van de Laar | Dennis | M | Gelderland | NL | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 126215 | van de Meerendonk | David | M | MN | US | 1 | Superior 100M 2025 (38 hours) † |
| 124096 | Van De Pette | Rob | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 125904 | van de Werf | Danny | M | Noord-Brabant | NL | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 100500 | Van den Broeck | Tim | M | BEL | BE | 8 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 123991 | Van Den Broucke | Rémi | M | Hauts de Seine | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 123515 | Van den oetelaar | Mark | M | Utrecht | NL | 1 | Swiss Canyon Trail 111km 2025 (24 hours) |
| 103462 | Van Der Groen | Dez | N | CA | US | 64 | Mountain Lakes 100M 2025 (30 hours) |
| 126227 | van der Krogt | Roman | M | Co Cork | IE | 1 | Kerry Way Ultra 101km 2025 (20 hours) |
| 125424 | Van der merwe | Shaun | M | Western cape | ZA | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 118638 | Van der stel | Barry | M | Zeeland | NL | 4 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 127020 | van der Stroom | Hilary | F | Arizona | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 120144 | van der Veen | Noor | M | Gelderland | NL | 2 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 126790 | van Dijk | Chris | M | North Carolina | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 125519 | Van Dyk | Gerry | M | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 124074 | Van Dyke | Shawn | M | MI | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 101821 | Van Ekris | John | M | PE | CA | 32 | Sulphur Springs 100km 2025 (18 hours) |
| 122241 | Van Geijn | Klaas | M | Noord Holland | NL | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 115922 | van Geuns | Jonathan | M | QC | CA | 4 | Rabid Raccoon 100km 2025 (22 hours) |
| 107511 | Van Horn | Hans | M | CA | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 105958 | Van Horn | Marci | F | UT | US | 8 | Wasatch Front 100M 2025 (36 hours) † |
| 118802 | Van Horn | Sabrina | F | CA | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 111584 | van Niekerk | Tarrin | F | Western Cape | ZA | 8 | Ultra-Trail Cape Town 100M 2024 (45 hours) |
| 117906 | Van Orman | James | M | OH | US | 4 | Mohican 100M 2025 (32 hours) |
| 124670 | Van Pelt | Samuel | M | WA | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 127499 | van Peppen | Ard | M | Limburg | NL | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 105431 | Van Praag | Nick | M | GBR | GB | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 126030 | Van Roe | Jordan | M | VA | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 107093 | Van Roekel | Cody | M | California | US | 4 | Cuyamaca 100km 2025 (17 hours) † |
| 124865 | Van Seghbroeck | Tim | M | Vlaams Brabant | BE | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 110257 | Van Sickle | Heather | F | CA | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 101546 | Van Sloten | Joel | M | WA | US | 8 | Cascade Crest 100M 2025 (34 hours) |
| 123568 | Van Tromp | Nick | M | West Sussex | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 123514 | van Venrooij | Tom | M | Utrecht | NL | 1 | Swiss Canyon Trail 111km 2025 (24 hours) |
| 125931 | Van vliet | Devan | M | NSW | AU | 1 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 113640 | Van Winkle | Michael | M | Ohio | US | 8 | Twisted Branch 100km 2025 (20 hours) † |
| 108469 | Van wyk | Andries | M | Western Cape | ZA | 2 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 121903 | van Wyk | Awie | M | Western Cape | ZA | 2 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 119750 | van Wyk | Combrinck | M | Western Cape | ZA | 2 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 117705 | van Wyk | Ross | M | KwaZulu-Natal | ZA | 2 | Karkloof 100M 2025 (36 hours) |
| 105844 | Van Zante | Beau | M | CA | US | 32 | Waldo 100km 2025 (18 hours) † |
| 115392 | Van Zyl | Gerhard | M | Fife | GB | 4 | West Highland Way 95M 2025 (30 hours) |
| 126502 | Vana | Nick | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 120421 | VanArsdale | Cheyne | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126423 | Vanbecelaere | Cas | M | Jette | BE | 1 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 117327 | vanblommestein | Christian | M | ID | US | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 123756 | VandenBerg | Andrew | M | Alberta | CA | 1 | Lost Soul Ultra 100M 2025 (33 hours) † |
| 123627 | vandereep | chad | M | alberta | CA | 1 | Lost Soul Ultra 100km 2025 (21 hours) |
| 117695 | Vandermeulen | Jo | F | Pembrokeshire | GB | 2 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 127605 | Vanderplas | Kristine | F | PA | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 118298 | Vang | Chee | F | CA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 125287 | Vang | Kou | M | Nh | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 112681 | Vangalur | Manivannan | M | Kentucky | US | 4 | Kettle Moraine 100M 2025 (30 hours) † |
| 118591 | VanGraafeiland | Keith | M | Virginia | US | 4 | Hellgate 100km 2024 (17 hours) |
| 124329 | Vanicatte | Maximilien | M | Rhône alpes | US | 1 | Trail du Saint-Jacques by UTMB 130km 2025 (28 hours) |
| 119574 | Vanicek | Michael | M | Brandenburg | DE | 2 | Hellbender 100M 2025 (40 hours) † |
| 126734 | VanKnotsenburg | Trevor | M | Florida | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 115024 | Vanoostveen | Paul | M | Ontario | CA | 4 | Sulphur Springs 100M 2025 (30 hours) |
| 117195 | Vanthuyne | Ty | M | ON - Ontario | CA | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 119525 | VANTOUROUT | JULIEN | M | France | FR | 2 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 110388 | VanZandt | Marie | F | CA | US | 16 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 114578 | Vapaaoksa | Jenni | F | Uusimaa | FI | 4 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 124069 | Varan | Gulay | F | London | GB | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 122648 | Varcasia | Jose | M | Lombardia | IT | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 111638 | Varekamp | Jacob | M | MA | US | 2 | Vermont 100km 2025 (17 hours) |
| 127856 | Vargas | Hernan | M | Bærum | NO | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 114985 | Vargas | Rafael | M | Santa Catarina | BR | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 127878 | Vargas Diaz | Hana | F | Norway | NO | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 120101 | Vargo | Anthony | M | WV | US | 2 | Massanutten 100M 2025 (36 hours) † |
| 118816 | Vargo | Roger | M | MI | US | 2 | Tunnel Hill 100M 2024 (30 hours) |
| 124294 | Varoni | Ettore | M | Co. Cork | IE | 1 | Kerry Way Ultra 193km 2025 (40 hours) |
| 107094 | Vasile | Marian | M | North Holland | NL | 2 | Leadville Trail 100M 2025 (30 hours) |
| 117913 | Vasquez | Daniel | M | Santiago | US | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 126964 | Vasser | Bryan | M | GA | US | 1 | Umstead 100M 2025 (30 hours) |
| 110813 | Vaughan | Brandon | M | Oregon | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 107095 | Vaughan | Patrick | M | VA | US | 32 | Hellbender 100M 2025 (40 hours) † |
| 100467 | Vaughan | Zach | M | OR | US | 8 | Waldo 100km 2025 (18 hours) † |
| 112088 | Vaught | Melissa | F | WA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 111211 | Vaupel | Martin | M | Bavaria | DE | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127728 | Vaynshteyn | Alex | M | CA | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 109430 | Vazquez | Edna Jackeline | F | IL | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 101418 | Vazquez Ramirez | Sergio | M | Aguascalientes | MX | 32 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 121645 | Veaute | Benjamin | M | Paris | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 107209 | Vecino Encabo | Oscar | M | Pamplona | ES | 1 | Gran Trail Peñalara 110km 2025 (25 hours) |
| 108929 | Veermeer | Julian | M | Western Cape | ZA | 8 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 127645 | Vega | Tawnee | F | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 116421 | Vegesana | Venu | M | NC | US | 2 | Umstead 100M 2025 (30 hours) |
| 124819 | Veilleux | Pascal | N | QC | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 118898 | Velasco | Juan Manuel | M | Bogota | CO | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127721 | Velasquez | Shekinah Glory | F | Philippines | PH | 1 | Hardcore Ultra Trail (HUT) 100M 2025 (44 hours) |
| 125098 | Velasquez Ardon | Rodrigo | M | San Salvador | SV | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 127505 | velasquez bernal | erwin | M | colombia | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 125717 | Velez | Leida | F | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 111511 | Veliskova | Jana | F | NY | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 122439 | Veloza | Jose Paulo | M | Western Cape | ZA | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 123133 | Veltman | Brandon | M | Texas | US | 2 | Long Haul 100M 2025 (30 hours) † |
| 127656 | VENIER | Pierrick | M | Marne | FR | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 127691 | Ventura | Javier | M | Madrid | ES | 1 | Gran Trail Peñalara 110km 2025 (25 hours) |
| 104301 | Venz | Gary | M | AUS | AU | 16 | Blackall 100km 2025 (18 hours) |
| 125357 | Ver Brugge | Peter | M | CA | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 125859 | Verbene | Daniel | M | Pennsylvania | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 120930 | Verbracken | Jason | M | California | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 107096 | Verdi | Elisheva | F | CA | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 124967 | Verduzco | German | M | Baja California | MX | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 121428 | Verdyan | Alex | M | Israel | IL | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 121684 | Verges | Pere | M | Barcelona | ES | 2 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 103471 | Verhees | Robert | M | CA | US | 64 | Cuyamaca 100km 2025 (17 hours) |
| 118624 | Verkade | Emiel | M | London | GB | 4 | Autumn 100M 2025 (28 hours) |
| 123704 | Verlé | Jonas | M | Vlaams Brabant | BE | 1 | Mallorca by UTMB: Serra de Tramuntana (SDT) 135km 2025 (30 hours) |
| 120524 | Verley | Matthew | M | SC | US | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 124952 | Verlinde | Jason | M | WA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 115125 | Vermaak | Thomas | M | Western Cape | ZA | 4 | Ultra Trail Drakensberg 163km 2025 (48 hours) |
| 117112 | Vermaat | Thijs | M | Nederland | NL | 4 | SwissPeaks 100km 2025 (28 hours) |
| 111737 | Vermeulen | Nick | M | New York | US | 4 | Worlds End 100km 2025 (19 hours) |
| 126082 | Verner | Adam | M | CO - Colorado | US | 1 | Never Summer 100km 2025 (23 hours) |
| 116582 | Verschaeve | Siebert | M | Nrw | DE | 2 | Swiss Alps 100M 2025 (50 hours) |
| 121706 | Veselka | Thomas | M | WI | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 123772 | Vesely | Will | M | TN | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 103180 | Veska | Chris | M | ON | CA | 16 | Sulphur Springs 100km 2025 (18 hours) |
| 114667 | VETOIS | JEREMY | M | FRANCE | FR | 4 | Grand Raid des Pyrénées - Ultra 160km 2025 (48 hours) |
| 115128 | Vetsch | Christian | M | Arizona | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 108683 | Vézina | Yannick | M | QC | CA | 16 | Vermont 100km 2025 (17 hours) |
| 127173 | VIALLON | Damien | M | Haut-Rhin | FR | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 123440 | VianaMachado | Tiago | M | Lisbon | PT | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 113809 | Viano | John Conrad | M | California | US | 8 | Crazy Mountain 100M 2025 (36 hours) † |
| 113071 | Vibert | Sheila | F | Va | US | 1 | Massanutten 100M 2025 (36 hours) |
| 126136 | Vicas | Nikhil | M | NY | US | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 127931 | Vicente | Gerber | M | CA | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 121119 | VICTOR | AARON | M | Northern Territory | AU | 2 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 120888 | Victor | Brandi | F | Ontario | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 126180 | Victor | CANIVENQ | M | Aveyron | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 125033 | Victors | Miles | M | Utah | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 120548 | Vidal | Lucas | M | Florida | US | 2 | Long Haul 100M 2025 (30 hours) † |
| 124094 | viel | Donald | M | Quebec | CA | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 123909 | Vieuguet | Sylvain | M | Allier | US | 1 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 103078 | Viger | Keith | M | BC | CA | 16 | HURT 100M 2025 (36 hours) † |
| 124225 | Vigil | Jon | M | Colorado | US | 1 | Vermont 100km 2025 (17 hours) |
| 124195 | Vigil | Kevin | M | Ca | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 122410 | vigliocco | mariela | F | cordoba | AR | 2 | La Mision 200km 2025 (75 hours) |
| 121463 | Vignard | Tom | M | Utah | US | 2 | Wasatch Front 100M 2025 (36 hours) † |
| 121908 | Vignes | Régis | M | Geneva | CH | 2 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 113622 | Viklund Borg | Clara | F | Stockholm | SE | 2 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 111722 | Vilaseca | Manuela | F | Barcelona | ES | 8 | Bigfoot 206M 2025 (100 hours) † |
| 127694 | Vilcapoma Perez | David Jhoannes | M | NV | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 109985 | Vilchis | Charline | F | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123637 | Villa | Juliana | F | Antioquia | CO | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 116362 | Villa Gongora | Delbi | M | Tahiti | PF | 4 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 125668 | Villalpando | Francisco | N | California | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 127937 | Villamaux | Quentin | M | 69 | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 124170 | Villarino | Daniel | M | NC | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 117315 | Villarreal | Jose | M | La | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 118560 | Villere | Justin | M | Pennsylvania | US | 4 | Umstead 100M 2025 (30 hours) |
| 125309 | Villiers | Jim | M | QLD | AU | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 117062 | Vinasi | Stefan | M | Cluj | RO | 2 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 116307 | Vince | Mercedes | F | BC | CA | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 102368 | Vincent | Christina | F | CA | US | 32 | Javelina Jundred 100M 2025 (30 hours) † |
| 124378 | Vincent | Greg | M | CT | US | 1 | Vermont 100km 2025 (17 hours) |
| 119286 | Vinco | Giulia | F | VR | IT | 1 | Tuscany Crossing 103km 2025 (21 hours) |
| 126081 | Viney | L-Mani | M | New Jersey | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 126579 | Vining | Ben | M | SD | US | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 117435 | Vining | Roanna | F | Hawkes Bay | NZ | 4 | Taupo 100km 2025 (17 hours) |
| 112012 | Vinyals | Victor | M | BARCELONA | ES | 8 | Tuscany Crossing 103km 2025 (21 hours) |
| 116006 | Virgin | Joseph | M | Missouri | US | 2 | Beaverhead 100km 2025 (20 hours) |
| 112150 | Virjee | Cameron | M | California | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 125971 | Vishnepolskiy | Igor | M | RI | US | 1 | Vermont 100M 2025 (30 hours) |
| 103994 | Visram | Alexander | M | GBR | GB | 16 | Lakeland 100M 2025 (40 hours) |
| 122198 | Visser | Matthijs | M | noord holland | NL | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 122504 | Visser | Willem | M | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 124566 | Vitkov | Victor | M | CO | US | 1 | Bighorn 100M 2025 (35 hours) |
| 125956 | VITTI | ANTOINE | M | NORD | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 127108 | Vivaldi | Valentino | M | TN | IT | 1 | Tuscany Crossing 160km 2025 (35 hours) |
| 122652 | Vivas | Javier | M | Lima | PE | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125087 | Vivian | Logan | M | PA | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 104325 | Vleck | Jan | M | WA | US | 1 | Western States 100M 2025 (30 hours) † |
| 122291 | VO THI THANH | NGA | F | Viet Nam | VN | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 121992 | Voet | Andreas | M | Antwerpen | BE | 2 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 102142 | Vogel | Mark | M | WA | US | 8 | Hardrock 100M 2025 (48 hours) † |
| 103032 | Vogel | Matthew | M | OH | US | 4 | Vermont 100km 2025 (17 hours) |
| 127334 | Vogel | Maximilian | M | Bavaria | DE | 1 | Zugspitz 100M 2025 (48 hours) |
| 111235 | Vogel | Timo | M | Upperaustria | AT | 8 | Ultra Trail Vipava Valley 106km 2025 (25 hours) |
| 109608 | Vogt | Peter | M | Niedersachsen | DE | 8 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 123426 | Vogt | Zachary | M | MS | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 120883 | Voigt | Kaleb | M | ID | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 101814 | Voigt | Torsten | M | BC | CA | 4 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 102218 | Vokes | Marty | M | SC | US | 16 | No Business 100M 2025 (34 hours) |
| 124230 | Vollkommer | Michael | M | CA | US | 1 | San Diego 100M 2025 (32 hours) † |
| 126549 | Vollmer | Emily | F | NY | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 113216 | Vollmer | Jasmine | F | VIC | AU | 8 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 127236 | Volner | James | M | TN | US | 1 | Mamba 100M 2024 (34 hours) |
| 102048 | Volock | Tammy | F | ME | US | 16 | Sulphur Springs 100km 2025 (18 hours) |
| 114474 | Von Bergen | Megan | F | TN | US | 2 | No Business 100M 2025 (34 hours) |
| 101500 | Von Bokern | Joe | M | CO | US | 16 | Canal Corridor 100M 2025 (30 hours) |
| 116458 | von Bormann | Alexander | M | MN | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 123434 | von der Assen | Niklas | M | North Rhine-Westphalia | DE | 1 | Leona Divide 100km 2025 (17 hours) |
| 103338 | Von Stroh | David | M | WA | US | 8 | Cascade Crest 100M 2025 (34 hours) |
| 119476 | Vonk | Lawrence | M | TX | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 126797 | Voorend | Paul | M | Wellington | NZ | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 125840 | Voorhees | Mark | M | Pa | US | 1 | Eastern States 100M 2025 (36 hours) |
| 106180 | Vora | Neel | M | CA | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 126834 | Vorell | Nathan | M | California | US | 1 | Cuyamaca 100km 2025 (17 hours) |
| 115358 | Vorobev | Viktor | M | Bayern | DE | 4 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 115140 | Vorobeva | Aleksandra | F | München | DE | 4 | Mozart by UTMB 119km 2025 (23 hours) |
| 119085 | Vosburgh | Matthew | M | NY | US | 2 | Vermont 100M 2025 (30 hours) |
| 125538 | Voss | Joel | M | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) |
| 121576 | Votteler | Oliver | M | Gyunsungbuk-do | KR | 2 | Mt Fuji 100M 2025 (46 hours) |
| 124112 | Voyles | Brian | M | CA | US | 1 | Waldo 100km 2025 (18 hours) † |
| 125745 | Vraves | Adam | M | WA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 110674 | Vriens | Lodewijk | M | - | HK | 8 | Hong Kong 100K 100km 2025 (23 hours) |
| 107472 | Vuletic | Kelly | F | OR | US | 8 | Waldo 100km 2025 (18 hours) † |
| 126649 | Vullierme | John | M | NA | HK | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 120834 | Vuong | Liem | M | California | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 123335 | Vyas | Ashutosh | M | Madhya pradesh | IN | 2 | Cameron Ultra-Trail 100km 2025 (28 hours) |
| 115033 | Vyrvich | Andrey | M | CA | US | 4 | Tahoe 202M 2025 (100 hours) † |
| 118842 | Vysinsky | Michal | M | SK | SK | 4 | Letecka Stovka 104km 2025 (21 hours) |
| 106639 | Vystejn | Jiri | M | CZE | CZ | 32 | Krakonosova Stovka 100km 2025 (22 hours) |
| 125958 | Wabra | Matthias | M | Bayern | DE | 1 | Zugspitz 100M 2025 (48 hours) |
| 106660 | Wacker | Jess | F | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 125977 | Wacker | Konstantin | M | Austria | AT | 1 | Swiss Alps 100km 2025 (22 hours) |
| 117677 | Waddle | Wesley | M | Kentucky | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 107716 | Waddoups | Heidi | F | UT | US | 16 | Zion 100M 2025 (36 hours) † |
| 103429 | Waddoups | Seth | M | UT | US | 8 | Wasatch Front 100M 2025 (36 hours) † |
| 125883 | Wade | Joseph | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 125052 | Wade | Matt | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 121744 | Waeghe | Jasper | M | Noord-Holland | NL | 2 | Swiss Alps 100M 2025 (50 hours) |
| 115952 | Wageman | Blake | F | CO | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 113443 | Wagenaar | Rutger | M | Friesland | NL | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 102220 | Wagner | Jason | M | MO | US | 32 | Fat Dog 120M 2025 (48 hours) † |
| 118202 | Wagner | Kyle | M | AL | US | 4 | Massanutten 100M 2025 (36 hours) † |
| 123682 | Wagner | Mike | M | NY | US | 1 | Vermont 100M 2025 (30 hours) |
| 119822 | Wagner | Sarah | F | Baden-Württemberg | DE | 2 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 101252 | Wagner | Thomas | M | AUT | AT | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 126311 | Wagner | Troy | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 122269 | Wain | Chantz | M | PA | US | 2 | Rim to River 100M 2025 (32 hours) |
| 105408 | Wainhouse | Owen | M | GBR | GB | 4 | Fat Dog 120M 2025 (48 hours) † |
| 109381 | Wainwright | Francis | M | Wiltshire | GB | 8 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 103195 | Wait | Isaac | M | WV | US | 16 | Tahoe 202M 2025 (100 hours) † |
| 109227 | Waite | John | M | Va | US | 16 | Hellgate 100km 2024 (17 hours) |
| 113739 | Waites | Adam | M | Victoria | AU | 8 | Surf Coast Century 100km 2025 (17 hours) |
| 119277 | Wakefield | Nikolas | M | Hampshire | GB | 2 | Eastern States 100M 2025 (36 hours) |
| 126118 | Walberer | Zac | M | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 104772 | Walch | Ed | M | KS | US | 4 | Mountain Lakes 100M 2025 (30 hours) † |
| 126676 | Walczak | Karl | M | NM | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 123892 | Walczak | Maciej | M | WIELKOPOLSKA | PL | 1 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 118703 | Waldorff | Erik | M | Ohio | US | 2 | Okushinano 100km 2025 (21 hours) |
| 109075 | Waldron | Laura | F | Illinois | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 121752 | Waldrop | Thomas | M | North Carolina | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 127082 | Walek | Liam | M | Nj | US | 1 | Worlds End 100km 2025 (19 hours) |
| 127858 | wales | chris | M | Lancashire | GB | 1 | North Downs Way 100M 2025 (30 hours) |
| 124212 | Walker | Adam | M | Ohio | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 120982 | Walker | Corey | M | CO | US | 2 | Javelina Jundred 100M 2025 (30 hours) |
| 124239 | Walker | John | M | KS | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 124101 | Walker | Josh | M | UT | US | 1 | Moab 238M 2025 (108 hours) † |
| 113236 | Walker | Justin | M | COLORADO | US | 8 | Hardrock 100M 2025 (48 hours) |
| 117486 | Walker | Kevin | M | CA | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 106091 | Walker | Lance | M | VA | US | 16 | Bear, The 100M 2025 (36 hours) † |
| 124762 | Walker | Logan | M | Colorado | US | 1 | Javelina Jundred 100M 2025 (30 hours) |
| 116528 | Walker | Luke | M | OR | US | 4 | Mountain Lakes 100M 2025 (30 hours) † |
| 120964 | Walker | Matt | M | West Yorkshire | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 117477 | Walker | Michael | M | CA | US | 4 | Umstead 100M 2025 (30 hours) |
| 102277 | Walker | Michael | M | OH | US | 8 | Sulphur Springs 100km 2025 (18 hours) |
| 123589 | Walker | Nick | M | PA | US | 1 | Eastern States 100M 2025 (36 hours) |
| 113507 | Walker | Preston | M | Washington | US | 8 | Hood Hundred 100M 2025 (34 hours) |
| 106666 | Walker | Rebecca | F | CO | US | 16 | Dinosaur Valley 100M 2024 (35 hours) † |
| 118541 | Walker | Scotty | M | CA | US | 4 | Rio Del Lago 100M 2025 (30 hours) |
| 113283 | Walker | Sheridan | M | BC | CA | 4 | Hood Hundred 100M 2025 (34 hours) |
| 125839 | Walkup | Kristina | F | TX | US | 1 | South Downs Way 100M 2025 (30 hours) |
| 124386 | Wall | Henry | M | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 126612 | Wallace | Brit | F | QLD | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 108141 | Wallace | Carolyn | F | OH | US | 16 | Fat Dog 120M 2025 (48 hours) † |
| 122201 | Wallace | David | M | AZ | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 113511 | Wallace | Drew | M | New Brunswick | CA | 8 | Vermont 100M 2025 (30 hours) |
| 125829 | Wallace | Jack | M | Western Australia | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 104957 | Wallace | Nathan | M | OR | US | 8 | Cascade Crest 100M 2025 (34 hours) |
| 126296 | Wallace | Patrick | M | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 106522 | Wallace | Sarah | F | PA | US | 16 | Rim to River 100M 2025 (32 hours) † |
| 108145 | Wallace | Zachary | M | Montana | US | 8 | Bear, The 100M 2025 (36 hours) † |
| 127630 | Wallick | Anthony | M | Pennsylvania | US | 1 | Moab 238M 2025 (108 hours) † |
| 114881 | Wallin | Natalya | F | North Carolina | US | 4 | Bighorn 100M 2025 (35 hours) |
| 111143 | Walling | Steven | M | OR | US | 8 | Hood Hundred 100M 2025 (34 hours) |
| 124526 | Wallingford | Audrey | F | CA | US | 1 | Leona Divide 100M 2025 (33 hours) † |
| 121296 | Wallrich | Jennifer | F | AZ | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 103425 | Walls | Andrew | M | OR | US | 32 | Waldo 100km 2025 (18 hours) † |
| 125452 | Walls | Rick | M | OH | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 127898 | Walmsley | Jim | M | Arizona | US | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 103731 | Walmsley | Konstantin | M | NJ | US | 1 | Western States 100M 2025 (30 hours) † |
| 124495 | Walsh | Doug | M | WA | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 112426 | Walsh | Jacob | M | MA | US | 8 | Tunnel Hill 100M 2024 (30 hours) † |
| 109325 | Walsh | James | M | OR | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 124843 | Walsh | Jeremy | M | Ontario | CA | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 108298 | Walsh | Meghan | F | CA | US | 2 | Cocodona 250M 2025 (125 hours) |
| 112016 | Walter | Cedric | M | Moselle | FR | 8 | Mallorca by UTMB: Camins de pedra seca (CPS) 102km 2025 (18 hours) |
| 113056 | Walter | Emily | F | Colorado | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 112451 | Walter | Jakob | M | CA | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 110578 | Walters | Bill | M | Idaho | US | 16 | Zion 100km 2025 (19 hours) |
| 116216 | Walters | Joshua | M | British Columbia | CA | 4 | Fat Dog 120M 2025 (48 hours) † |
| 125698 | Walters | Sean | M | Virginia | US | 1 | Massanutten 100M 2025 (36 hours) |
| 125390 | Walton | Rheena | F | QLD | AU | 1 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 101642 | Walton-Robertson | Supaporn | F | NV | US | 16 | Hennepin 100M 2025 (30 hours) † |
| 124830 | Walushka | Shelley | F | ON | CA | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 127364 | Walz | Justin | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 122057 | Wanezek | Sam | M | Colorado | US | 2 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 100639 | Wang | Edward | M | CA | US | 2 | Fat Dog 120M 2025 (48 hours) † |
| 116976 | WANG | FENG | M | shanghai | CN | 4 | Hong Kong 100K 100km 2025 (23 hours) |
| 127829 | Wang | Gang | F | Beijing | CN | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 103281 | Wang | Gary | M | CA | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 116966 | WANG | JIADONG | M | SHANGHAI | CN | 2 | Hong Kong 100K 100km 2025 (23 hours) |
| 122165 | WANG | JINGYI | M | GUANGDONG | CN | 1 | Western States 100M 2025 (30 hours) † |
| 119580 | WANG | JIQIAN | M | Shaanxi | CN | 2 | Transgrancanaria 125km 2025 (28 hours) |
| 109183 | Wang | Matt | M | New York | US | 2 | Tahoe 202M 2025 (100 hours) † |
| 117930 | Wang | Michael | M | New Jersey | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127392 | Wang | Michael | M | VIC | AU | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 124619 | Wang | Michelle | F | AB | CA | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 119703 | Wang | Shuran | F | New York | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 112813 | Wang | Xi | F | New Jersey | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 127726 | Wang | Xiaodong | M | Not Required | CN | 1 | Mount Yun by UTMB - UMY 159.6km 2025 (48 hours) |
| 115111 | Wang | Xiaohua | M | Sichuan | CN | 2 | DL 100 106km 2025 (26 hours) |
| 127305 | Wang | Xin | M | Beijing | CN | 1 | Mount Yun by UTMB - UMY 159.6km 2025 (48 hours) |
| 122478 | Wang | Yan | M | Beijing | CN | 2 | Hong Kong 100K 100km 2025 (23 hours) |
| 113790 | Wang | Yi Victor | M | Massachusetts | US | 8 | Sean O'Brien 100km 2025 (17 hours) † |
| 118847 | wang | yu | M | shanxi | CN | 4 | DL 100 106km 2025 (26 hours) |
| 127387 | WANG | YU-CHIH | M | 大同區迪化街二段23巷9號4樓 | TW | 1 | HOKA Chiang Mai Thailand by UTMB Trans-Int 160 175km 2024 (48 hours) |
| 124269 | Wang | Yuhui | F | CA | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 123671 | Wang | Zeshen | M | Ontario | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 121879 | Wansbrough | Erin | F | Waikato | NZ | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 127438 | WARD | ANDREW | M | Kentucky | US | 1 | Mohican 100M 2025 (32 hours) |
| 124092 | Ward | Dolan | M | ID | US | 1 | HURT 100M 2025 (36 hours) † |
| 126078 | Ward | Leonard | M | AR | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 120698 | Ward | Marc | M | West Midlands | GB | 2 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 124217 | Ward | Mary | F | Kilkenny | IE | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 115717 | Ward | Mindy | F | Iowa | US | 4 | Hennepin 100M 2025 (30 hours) |
| 127767 | Ward | Nathan | N | WY | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 101337 | Ward | Richard | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 124233 | Ward | TJ | M | NJ | US | 1 | Cocodona 250M 2025 (125 hours) |
| 126684 | Ward | Tom | M | BC | CA | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 122609 | Ward Temple | Jessica | F | BC | CA | 2 | Fat Dog 120M 2025 (48 hours) |
| 125301 | Ward-Johnson | Charles | M | Wellington | NZ | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 104663 | Ward-Waller | Chelsea | F | AK | US | 2 | HOKA Bandera 100km 2025 (17 hours) |
| 105152 | Ward-Waller | Jeanie | F | CA | US | 32 | Hood Hundred 100M 2025 (34 hours) |
| 124410 | Wardian | Michael | M | Virginia | US | 1 | Hardrock 100M 2025 (48 hours) |
| 100545 | Ware | Matthew | M | CA | US | 128 | Canyons by UTMB 104km 2025 (20 hours) |
| 124093 | Ware | Patrick | M | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) |
| 104229 | Wareham | Julian | M | GBR | GB | 32 | Lakeland 100M 2025 (40 hours) |
| 114039 | Warfel | Heidi | F | CO | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 108760 | Warfvinge | Enar | M | n/a | SE | 8 | Kullamannen by UTMB 100M 2025 (32 hours) |
| 102358 | Warner | Brant | M | GA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 126335 | Warner | Elizabeth | F | CA | US | 1 | Bigfoot 206M 2025 (100 hours) † |
| 123498 | Warner | Eric | M | CA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 109590 | Warner | Nathan | M | Arizona | US | 8 | Javelina Jundred 100M 2025 (30 hours) |
| 106559 | Warnick | Richters | M | OR | US | 8 | Zion 100M 2025 (36 hours) † |
| 104896 | Warren | Jimmy | M | CO | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 127008 | Warren | Katie | F | WA | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 124678 | Warren | Lee | M | CA | US | 1 | Leona Divide 100M 2025 (33 hours) † |
| 113915 | Warren | Michael | M | MD | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 112811 | Warren | Tara | F | Utah | US | 8 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 117802 | Warriner | Lawrence | M | Ontario | CA | 4 | Sulphur Springs 100km 2025 (18 hours) |
| 125313 | Warta | Hailey | F | California | US | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 127716 | Wartman | Jakob | M | MN | US | 1 | Superior 100M 2025 (38 hours) † |
| 107103 | Warunchaichana | Wittaya | M | Nonthaburi | TH | 8 | Pong Yaeng Trail 100km 2025 (31 hours) |
| 104481 | Washburn | Brendan | M | CA | US | 32 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 119938 | Watanabe | Kohei | M | Kanagawa | JP | 2 | OSJ Ontake 100km 2025 (20 hours) |
| 113266 | WATANABE | Takahiro | M | Tokyo | JP | 8 | Ulju Trail Nine Peaks 128km 2025 (40 hours) |
| 112391 | Waterman | Eric | M | California | US | 8 | Zion 100km 2025 (19 hours) |
| 107608 | Waterman-Evans | Louis | M | Argyll & Bute | GB | 2 | Zugspitz 106km 2025 (25 hours) |
| 118083 | Waters | Eric | M | California | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 116687 | Waters | Fredrick | M | Utah | US | 4 | Zion 100km 2025 (19 hours) |
| 100549 | Watkins | Aaron | M | Pa | US | 32 | Rim to River 100M 2025 (32 hours) † |
| 120865 | Watkins | Justin | M | UT | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 126223 | Watmough | Lewis | M | Lancashire | GB | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 113327 | Watrous | Brittany | F | CA | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 107747 | Watson | Brian | M | Texas | US | 16 | Dinosaur Valley 100km 2024 (22 hours) |
| 124210 | Watson | Christopher | M | CO | US | 1 | Cruel Jewel 106M 2025 (48 hours) † |
| 116619 | Watson | Jack | M | CO | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 115981 | Watson | Jimmy | M | NV | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 105247 | Watson | Jocelyn | F | CA | US | 16 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 101343 | Watson | Lauren | F | NV | US | 4 | Cascade Crest 100M 2025 (34 hours) |
| 106246 | Watson | Lisa | F | GBR | GB | 16 | South Downs Way 100M 2025 (30 hours) |
| 120808 | Watson | Suzanne | F | CA | US | 2 | Angeles Crest 100M 2025 (36 hours) † |
| 103457 | Watson | Thomas | M | NZL | NZ | 4 | Taupo 100km 2025 (17 hours) |
| 124992 | Watt | John | M | KS | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 114778 | Watts | Brent | M | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 108691 | Watts | Laura | F | West Sussex | GB | 4 | North Downs Way 100M 2025 (30 hours) |
| 127967 | Watts | Matt | M | Arizona | US | 1 | Cocodona 250M 2025 (125 hours) |
| 126550 | Weatherford | Drew | M | Oklahoma | US | 1 | Pinhoti 100M 2025 (32 hours) † |
| 113825 | Weatherford | Kimberly | F | VA | US | 2 | No Business 100M 2025 (34 hours) |
| 102020 | Weathers | Bryan | M | CA | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 102515 | Weaver | Alexander | M | TX | US | 16 | Rocky Raccoon 100M 2025 (30 hours) |
| 118690 | Weaver | Brad | M | SC | US | 4 | Georgia Death Race 74M 2025 (24 hours) † |
| 125056 | Weaver | Garrett | M | CO | US | 1 | Never Summer 100km 2025 (23 hours) |
| 127516 | Weaver | Philip | M | Gloucestershire | US | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 100623 | Weaver | Rainey | F | AZ | US | 32 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 115211 | Weaver | Tom | M | England | GB | 4 | Autumn 100M 2025 (28 hours) |
| 117395 | Webb | Daniel | M | Essex | GB | 4 | Valleys Ultra (13) 180km 2025 (46.5 hours) |
| 125706 | Webb | Ellie | F | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 119782 | Webb | Kester | M | Cumbria | GB | 2 | Transgrancanaria 125km 2025 (28 hours) |
| 105203 | Webb | Martin | M | GBR | GB | 32 | Thames Path 100M 2025 (30 hours) |
| 115776 | Webb | Matthew | M | CO | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 127452 | Webb | Paul | M | ca | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 127141 | Webb | Ry | M | Surrey | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 127243 | Webb | Simon | M | AL | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 101206 | Webb | Steve | M | CA | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 124911 | Webb | Zachary | M | Texas | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 127528 | Webber | Megan | F | MA | US | 1 | Vermont 100km 2025 (17 hours) |
| 127490 | Weber | Adrian | M | Victoria | AU | 1 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 110842 | Weber | Brad | M | Bayern | DE | 16 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 109301 | Weber | Quin | F | Ga | US | 8 | No Business 100M 2025 (34 hours) |
| 124099 | Weber | Suzanne | F | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 125327 | Weeda | Willem | M | Zuid Holland | NL | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 109566 | Weedman | Robert | M | Virginia | US | 2 | Laurel Highlands 70.5M 2025 (20 hours) |
| 104945 | Weekley | Marlin | M | IL | US | 32 | Long Haul 100M 2025 (30 hours) † |
| 109243 | Weeter | Bryce | M | North Carolina | US | 16 | Long Haul 100M 2025 (30 hours) † |
| 118649 | Wege | William | M | Fl | US | 2 | Umstead 100M 2025 (30 hours) |
| 112686 | Wegener | Sidney | M | WI | US | 4 | Zion 100km 2025 (19 hours) |
| 109945 | Wegner | Carita | F | Massachusetts | US | 2 | Vermont 100M 2025 (30 hours) |
| 116150 | Wegner | Scott | M | Washington | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 123452 | Wegner | Wade | M | WA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 102697 | Wehan | Christopher | M | CA | US | 16 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 106002 | Wehner | Robert | M | WI | US | 4 | Hellgate 100km 2024 (17 hours) |
| 113966 | Wei | Stephanie | F | CA | US | 8 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 102721 | Weibel | Amber | F | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 102709 | Weibel | Ryan | M | CA | US | 16 | Run Rabbit Run 100M 2025 (36 hours) † |
| 101717 | Weidman | William | M | VA | US | 32 | Hellbender 100M 2025 (40 hours) † |
| 126269 | Weidner | Dylan | M | TX | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 116120 | Weigand | Cyrus | M | California | US | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127308 | Weiler | Christoph | M | Bavaria | DE | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 118920 | Weinacht | Andrew | M | ON | CA | 4 | Sulphur Springs 100M 2025 (30 hours) |
| 119983 | Weinberger | Zach | M | VA | US | 2 | Laurel Highlands 70.5M 2025 (20 hours) |
| 114846 | Weingärtner | Michael | M | Bayern | DE | 4 | Zugspitz 100M 2025 (48 hours) |
| 104007 | Weinman | Casey | M | OR | US | 32 | Hood Hundred 100M 2025 (34 hours) |
| 125545 | Weinsheimer | Michael | N | Ohio | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 113797 | Weintraub | Karen | F | CA | US | 8 | Cascade Crest 100M 2025 (34 hours) |
| 104262 | Weir | Adam | M | WA | US | 32 | Cascade Crest 100M 2025 (34 hours) |
| 126877 | Weir | Adam | M | CA | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 100196 | Weiss | Annie | F | WI | US | 1 | Western States 100M 2025 (30 hours) † |
| 119648 | Welch | Andrew | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 112142 | welden | michael | M | NY | US | 8 | Twisted Branch 100km 2025 (20 hours) † |
| 124627 | Welker | Marcus | M | NC | US | 1 | Bighorn 100M 2025 (35 hours) |
| 113970 | Weller | Dylan | M | On | CA | 4 | Fat Dog 120M 2025 (48 hours) † |
| 123527 | Weller | Tom | M | United Kingdom | GB | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 123760 | Wellman | Sam | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 117498 | Wells | Ben | M | CO | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 122223 | Wells | Brandon | M | AZ | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 126354 | Wells | David | M | MT | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 105798 | Wells | Majel | F | IN | US | 32 | Kettle Moraine 100M 2025 (30 hours) † |
| 121302 | Wells | Michael | M | British Columbia | CA | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 122229 | Wells | Ryan | M | AZ | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 116640 | Wells | Yekaterina | F | British Columbia | CA | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 120394 | Welsch | Shane | M | TX | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 116975 | wen | fangyuan | F | shanghai | CN | 4 | Mt Fuji 100M 2025 (46 hours) |
| 120280 | Wender | Johanna | F | TX | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 112202 | Weng | Timothy | M | TX | US | 8 | Bear, The 100M 2025 (36 hours) † |
| 100862 | Wenger | Nick | M | CA | US | 32 | Kettle Moraine 100M 2025 (30 hours) † |
| 112975 | WENGER | SARAH | F | Pa | US | 4 | Eastern States 100M 2025 (36 hours) |
| 112748 | Weninger | Diane | F | GA | US | 8 | Bighorn 100M 2025 (35 hours) |
| 127952 | Wenkman | Margaret | F | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 117175 | Wenneker | Jennifer | F | TN | US | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 112218 | Wennergren | Tobias | M | California | US | 4 | Bigfoot 206M 2025 (100 hours) † |
| 126467 | Wentz | Wendy | F | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 100016 | Wentzell | Josh | M | PA | US | 16 | Rim to River 100M 2025 (32 hours) † |
| 119791 | Werchola | Daniel | M | Surrey | GB | 2 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 124783 | Wergiles | Jordan | M | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) † |
| 107584 | WERKMEISTER | MARK | M | NM | US | 8 | Rio Del Lago 100M 2025 (30 hours) |
| 127299 | Wermus | Adam | M | CA | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 123612 | Werneck | Fred | M | ZH | CH | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 122894 | Werneiwski | Michael | M | CA | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 108032 | Werner | Mica | F | OR | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 123562 | Werwein | Alexander | M | Hessen | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 116534 | Wesolowski | Eric | M | Hawaii | US | 4 | Bighorn 100M 2025 (35 hours) |
| 114626 | Wessells | Alyson | F | MI | US | 2 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 118265 | West | Abigail | F | GA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 124825 | West | Danny | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 126230 | West | Jason | M | QLD | AU | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 126743 | West | Justin | M | NC | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 126573 | West | Kenny | M | TN | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 125433 | Westbay | Michelle | F | VA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 103345 | Westergaard | Danny | M | CA | US | 32 | Javelina Jundred 100M 2025 (30 hours) † |
| 127443 | Westerland | Craig | M | MN | US | 1 | Superior 100M 2025 (38 hours) † |
| 106331 | Westerlin | Henrik | M | CH | CH | 2 | South Downs Way 100M 2025 (30 hours) |
| 127352 | Westman | Blake | M | WA | US | 1 | Zion 100km 2025 (19 hours) |
| 117028 | Westmeyer | Laura | F | OR | US | 4 | Waldo 100km 2025 (18 hours) † |
| 124921 | Weston | Holly | F | Canterbury | NZ | 1 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 125511 | Westphal | Nick | M | Colorado | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 125413 | westreicher | davy | M | Savoie | FR | 1 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 118543 | Wettstein | Salomon | M | Hong Kong | HK | 2 | Hong Kong 100K 100km 2025 (23 hours) |
| 101601 | Wetzel | Evan | M | WI | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 104872 | Wever | Lael | M | OK | US | 16 | Never Summer 100km 2025 (23 hours) |
| 125226 | Wexler | Ellen | F | VA | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 125500 | Wharto | Andrew | M | MT | US | 1 | Crazy Mountain 100M 2025 (36 hours) † |
| 104263 | Wheat | Alan | M | AUS | AU | 8 | North Downs Way 100M 2025 (30 hours) |
| 103422 | Wheat | Kevin | M | CO | US | 1 | Western States 100M 2025 (30 hours) † |
| 124332 | Wheeler | Bradley | M | Tennessee | US | 1 | No Business 100M 2025 (34 hours) |
| 125761 | Wheeler | Fiona | F | NSW | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 108092 | Wheeler | Timothy | M | CA | US | 16 | Bear, The 100M 2025 (36 hours) † |
| 116750 | Wheeler DeBoef | Shannon | F | Tennessee | US | 4 | Cruel Jewel 106M 2025 (48 hours) † |
| 125759 | Wheelock | Amanda | F | NC | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 115171 | Whelan | Ryan | M | NA | US | 4 | Hong Kong 100K 100km 2025 (23 hours) |
| 126251 | whewell | eric | M | CO | US | 1 | Never Summer 100km 2025 (23 hours) |
| 127538 | Whiley | Sarah | F | Queensland | AU | 1 | Blackall 100km 2025 (18 hours) |
| 114795 | Whipple | Jennifer | F | WA | US | 4 | Cascade Crest 100M 2025 (34 hours) |
| 127266 | Whitaker | Jacob | M | NSW | AU | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 123937 | Whitaker | Joshua | M | Victoria | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 117338 | Whitbread | Nicholas | M | British Columbia | CA | 4 | Fat Dog 120M 2025 (48 hours) † |
| 120004 | White | Alex | M | WI | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 121128 | white | andrea | F | NV | US | 2 | Sedona Canyons 125M 2025 (52 hours) |
| 124390 | White | Andrew | M | North Carolina | US | 1 | Umstead 100M 2025 (30 hours) |
| 125041 | WHITE | BRITTANY | F | WA | US | 1 | Bigfoot 206M 2025 (100 hours) † |
| 126747 | White | Darragh | M | Wexford | IE | 1 | Kerry Way Ultra 193km 2025 (40 hours) |
| 105757 | White | Eli | M | UT | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 100185 | White | James | M | GBR | GB | 32 | Eiger Ultra Trail 250km 2025 (90 hours) |
| 125140 | White | Katie | F | Auckland | NZ | 1 | Taupo 100km 2025 (17 hours) |
| 100765 | White | Keith | M | NV | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 125236 | White | Kristie | F | QLD | AU | 1 | Blackall 100km 2025 (18 hours) |
| 106223 | White | Melanie | F | CO | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 126543 | White | Michael | M | California | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 125449 | White | Patrick | M | Texas | US | 1 | Tunnel Hill 100M 2024 (30 hours) |
| 109970 | White | Robert | M | Ca | US | 16 | Sean O'Brien 100km 2025 (17 hours) † |
| 124963 | White | William (Billy) | M | Sörmland | SE | 1 | Transgrancanaria 125km 2025 (28 hours) |
| 124997 | Whitehead | Hayley | F | Cheshire | GB | 1 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 126489 | Whitehouse | Jordan | M | OH | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 111244 | Whiteside | Hoyle | M | Virginia | US | 8 | No Business 100M 2025 (34 hours) |
| 103779 | Whitestone | Christopher | M | CO | US | 16 | High Lonesome 100M 2025 (37 hours) |
| 109714 | Whitfield | William | M | England | GB | 2 | Lakeland 100M 2025 (40 hours) |
| 111420 | Whiting | Mae | F | Texas | US | 8 | Yeti Virginia 100M 2025 (30 hours) † |
| 124409 | Whitlock | Marnie | F | Hawaii | US | 1 | Bigfoot 206M 2025 (100 hours) |
| 124605 | Whitlock | Scott | M | Arizona | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 117544 | Whitman | Rebecca | F | FL | US | 4 | Lost Soul Ultra 100km 2025 (21 hours) |
| 123669 | Whitmoyer | Daniel | M | New Hampshire | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 123094 | Whitney | Jamie | M | OR | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 126128 | Whitson | Ethan | M | Colorado | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 111602 | Whittaker | Arianne | F | Michigan | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 119618 | Whittaker | Jason | M | MI | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 125726 | Whittet | Justin | M | CA | US | 1 | Leona Divide 100km 2025 (17 hours) |
| 115255 | Whittle | Claire Grace | F | marlborough | NZ | 4 | Tarawera by UTMB 102km 2025 (17 hours) |
| 100212 | Whyman | Matt | M | GBR | GB | 8 | Autumn 100M 2025 (28 hours) |
| 119987 | Whynot | Jennifer | F | Maine | US | 2 | Vermont 100M 2025 (30 hours) |
| 104646 | Wiboonkij-Arphakul | Chaiyaporn | M | THA | TH | 32 | Taupo 100km 2025 (17 hours) |
| 123686 | Wichmann | Trevor | M | OR | US | 1 | Waldo 100km 2025 (18 hours) † |
| 125160 | Wickersham | Scott | M | IN | US | 1 | Indiana 100M 2025 (30 hours) |
| 105583 | Wickless | Andrew | M | CO | US | 8 | Never Summer 100km 2025 (23 hours) |
| 118797 | Wicks | Jessica | F | Oklahoma | US | 1 | Bigfoot 206M 2025 (100 hours) † |
| 126623 | Widing | Charles | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 117585 | Widmer | Tim | M | CO | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 125006 | Wieder | Zach | M | California | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 122704 | Wieland | Jeremy | M | Baden-Württemberg | DE | 2 | Zugspitz 106km 2025 (25 hours) |
| 113878 | Wiens | Brian | M | California | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 124839 | Wiesel | Justin | M | NJ | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 112226 | Wiest | Brian | M | PA | US | 8 | Worlds End 100km 2025 (19 hours) |
| 103531 | Wiffen | Joshua | M | AUS | AU | 4 | Mt Fuji 100M 2025 (46 hours) |
| 127415 | Wiggenhorn | Amanda | F | CA | US | 1 | Quicksilver 100km 2025 (17 hours) |
| 123948 | Wiggins | Ross | M | Derbyshire | GB | 1 | Swiss Alps 100M 2025 (50 hours) |
| 124953 | Wigginton | John | M | Texas | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 111728 | Wighardt | Madeline | F | Ontario | CA | 2 | Cascade Crest 100M 2025 (34 hours) |
| 124763 | Wigley | Keith | M | North Yorkshire | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 123111 | Wilber | Jeff | M | Ca | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 116691 | Wilbourn | Joe | M | California | US | 4 | Cuyamaca 100km 2025 (17 hours) † |
| 127764 | Wilbur | Zac | M | Texas | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 126828 | Wilcox | Travis | M | WA | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 122111 | Wilde | Chris | M | Maryland | US | 2 | Massanutten 100M 2025 (36 hours) † |
| 125247 | Wilder | Chris | M | Victoria | AU | 1 | Lake Biwa 100M 2025 (52 hours) |
| 121398 | Wildermuth | Ian | M | Oregon | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 104251 | Wildig | Rob | M | AUS | AU | 128 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 126086 | Wiley | Benjamin | M | NY | US | 1 | Waldo 100km 2025 (18 hours) † |
| 123897 | Wilhelm | Brandon | M | MD | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 119138 | wilhelmson | krista | F | MN | US | 2 | Cocodona 250M 2025 (125 hours) |
| 102111 | Wilk | Jacek | M | POL | PL | 32 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 120535 | Wilken | Marian | M | BY | DE | 2 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 101635 | Wilkes | Clay | M | UT | US | 1 | Western States 100M 2025 (30 hours) † |
| 127768 | Wilkes | Mark | M | UT | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 124926 | Wilking | Felix | M | Berlin | DE | 1 | Zugspitz 100M 2025 (48 hours) |
| 120763 | Wilkins | Blake | M | Texas | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 108647 | Wilkins | Jill | F | UT | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 126492 | Wilkinson | Christopher | M | Texas | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 126188 | Wilkinson | Madison | F | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 100797 | Wilkinson | Mike | M | CO | US | 64 | Run Rabbit Run 100M 2025 (36 hours) |
| 125374 | Wilkinson | Nick | M | London | GB | 1 | Istria by UTMB 168km 2025 (46 hours) |
| 121313 | Willard | Nicholas | M | IL | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 105639 | Willcox | Ally | M | AUS | AU | 16 | Buffalo Stampede 100km 2025 (23 hours) |
| 125407 | Wille | Florian | M | Switzerland | CH | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 127061 | Willems | Jai | M | QLD | AU | 1 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 103346 | Williams | Andrew | M | BC | CA | 2 | Fat Dog 100km 2025 (24 hours) |
| 114863 | Williams | Ashley | M | QLD | AU | 4 | Guzzler Ultra 100km 2025 (24 hours) |
| 122890 | Williams | Billy | M | Tennessee | US | 2 | No Business 100M 2025 (34 hours) |
| 104412 | Williams | Brent | M | TX | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 114075 | Williams | David | M | UT | US | 4 | San Diego 100M 2025 (32 hours) † |
| 126720 | Williams | Dustin | M | UT | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 123643 | Williams | Eric | M | California | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 121946 | Williams | Fulton | M | AL | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 127290 | Williams | Jason | M | WA | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 127707 | Williams | Jennifer | F | ohio | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 124382 | Williams | Jesse | M | AZ | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 125596 | Williams | Joe | M | Leicestershire | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 124561 | Williams | John | M | Oregon | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 108109 | Williams | John | M | Cork | IE | 8 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 114720 | Williams | Josh | M | Flintshire | GB | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 124904 | Williams | Kajsa | F | California | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 125417 | Williams | Kolton | M | Washington | US | 1 | Zion 100M 2025 (36 hours) † |
| 127427 | Williams | Kurt | M | Ca | US | 1 | San Diego 100M 2025 (32 hours) † |
| 125673 | Williams | Mark | M | MN | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 124494 | Williams | Michael | M | KY | US | 1 | Moab 238M 2025 (108 hours) † |
| 103966 | Williams | Nathan | M | UT | US | 16 | Wasatch Front 100M 2025 (36 hours) † |
| 120509 | Williams | Nathan | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 103939 | Williams | Sarah Kirsty | F | Essex | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 109503 | Williams | Shane | M | HI | US | 2 | HURT 100M 2025 (36 hours) † |
| 108958 | Williams | Shane | M | UT | US | 4 | Wasatch Front 100M 2025 (36 hours) † |
| 125860 | Williams | Thomas | M | Idaho | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 124625 | Williamson | Miranda | F | CO | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 124025 | Williamson | Ritchie | M | West Yorkshire | GB | 1 | Valleys Ultra (13) 180km 2025 (46.5 hours) |
| 113381 | Williamson | Ted | M | Madeira Island | PT | 8 | Long Haul 100M 2025 (30 hours) † |
| 120318 | Williford | Mindy | F | CO | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 121106 | Willis | William | M | NC | US | 2 | Hellbender 100M 2025 (40 hours) † |
| 106633 | Willitts | Jason | M | CA | US | 16 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 127763 | Willoughby | Cameron | M | IL | US | 1 | Tunnel Hill 100M 2024 (30 hours) |
| 116202 | Wills | Fred | M | CT | US | 4 | Twisted Branch 100km 2025 (20 hours) † |
| 123332 | Willy | Bertin | M | vendée | FR | 2 | Trail du Saint-Jacques by UTMB 130km 2025 (28 hours) |
| 115443 | Wilm | Robin | M | Bayern | DE | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 108115 | Wilmer | Samuel | M | Indiana | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 123609 | Wilmore | Dominique | F | WA | US | 1 | Cascade Crest 100M 2025 (34 hours) |
| 122421 | Wilmot | Jeremy | M | VIC | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 115172 | Wilmshurst | Robyn | F | Victoria | AU | 2 | Surf Coast Century 100km 2025 (17 hours) |
| 127314 | Wilsdon | Ashley | M | London | GB | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 124449 | Wilsey | Jay | M | CA | US | 1 | Waldo 100km 2025 (18 hours) † |
| 126558 | Wilsey | Kurtis | M | WA | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 126806 | Wilson | Alec (AJ) | M | Colorado | US | 1 | Never Summer 100km 2025 (23 hours) |
| 106127 | Wilson | Amanda | F | NC | US | 16 | Long Haul 100M 2025 (30 hours) † |
| 112461 | Wilson | Bud | M | NJ | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 119944 | Wilson | Caleb | M | Colorado | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 102597 | Wilson | Catie | F | NC | US | 32 | Yeti Virginia 100M 2025 (30 hours) † |
| 126476 | Wilson | Dan | M | MA | US | 1 | Vermont 100M 2025 (30 hours) |
| 125191 | Wilson | Devin | M | OR | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 119666 | Wilson | Eva (aka Ewa) | F | NSW | AU | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 122337 | Wilson | Isaac | M | KS | US | 2 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 120150 | Wilson | Jessica | F | ON | CA | 2 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 123582 | Wilson | Joshua | M | Missouri | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 126141 | Wilson | Josiah | M | TX | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 111128 | Wilson | Justyna | F | PA | US | 8 | Rim to River 100M 2025 (32 hours) † |
| 127072 | Wilson | Matt | M | Cumbria | GB | 1 | Eiger Ultra Trail 250km 2025 (90 hours) |
| 111074 | Wilson | Michael | M | NJ | US | 4 | Burning River 100M 2025 (30 hours) |
| 125878 | Wilson | Nicholas | M | California | US | 1 | Bighorn 100M 2025 (35 hours) |
| 110217 | Wilson | Richard | M | Cumbria | GB | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 126222 | Wilson | Ryan | M | KY | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 126002 | Wilson | Stephen | M | PA | US | 1 | No Business 100M 2025 (34 hours) |
| 124308 | Wilson | Travis | M | IL | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 125290 | Wilson | Trevor | M | CA | US | 1 | Waldo 100km 2025 (18 hours) † |
| 108859 | Wilson | Trevor | M | IL | US | 16 | Dinosaur Valley 100km 2024 (22 hours) |
| 105289 | Wilson | Zac | M | Tennessee | US | 128 | Cruel Jewel 106M 2025 (48 hours) |
| 126456 | Wilsterman | Grant | M | NC | US | 1 | Vermont 100km 2025 (17 hours) |
| 126884 | Wimmer | Lisa | F | Bavaria | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 114260 | Wims | Zachary | M | California | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 125061 | Winata | Barry | M | New South Wales | AU | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 hours) |
| 101661 | Winchester | Jeff | M | NC | US | 32 | Yeti Virginia 100M 2025 (30 hours) † |
| 101589 | Wind | Andy | M | VA | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 118844 | Windeyer | Robert | M | Berkshire | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 123751 | Windust | James | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 123605 | Winebrenner | Nick | M | Pennsylvania | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 127324 | Winegar | Brett | M | NM | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 123953 | Wing | Tyler | M | Minnesota | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 100540 | Wingler | Brad | M | PA | US | 128 | Hellgate 100km 2024 (17 hours) |
| 126783 | Wingo | Christopher | M | OR | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 127609 | Winkel | Till | M | Sachsen | DE | 1 | Swiss Alps 100km 2025 (22 hours) |
| 106217 | Winkler | Jon | M | CO | US | 32 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 102822 | Winkler | Simone Angela | F | CA | US | 8 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 120832 | Winny | Jocelyn | F | British Columbia | CA | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 120354 | Winsand | Robert | M | UT | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 108267 | Winslett | Kris | M | TEXAS | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 100539 | Winter | Cheri | F | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 119347 | Winter | Chris | M | NV | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 107674 | Winter | Rebekah | F | NV | US | 2 | Beaverhead 100km 2025 (20 hours) |
| 119793 | Wischniewski | Denis | M | Bavaria | DE | 2 | Zugspitz 106km 2025 (25 hours) |
| 117719 | Wisdom | Gavin | M | MT | US | 4 | IMTUF 100M 2025 (36 hours) † |
| 127467 | Wismer | Laura | F | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 101197 | Wist | Bundy | M | PA | US | 8 | Wasatch Front 100M 2025 (36 hours) † |
| 104650 | Witibschlager | Philipp | M | AUT | AT | 16 | Javornika 105km 2025 (24 hours) |
| 102448 | Witko | Ryan | M | NY | US | 8 | Indiana 100M 2025 (30 hours) |
| 127016 | witte | etienne | M | OR | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 101457 | Witte | Joshua | M | VA | US | 32 | Canal Corridor 100M 2025 (30 hours) † |
| 123971 | Wittenauer | Steffen | M | Bern | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 103176 | Wittman | Jeremy | M | Texas | US | 128 | Dinosaur Valley 100km 2024 (22 hours) |
| 116109 | Wittmann | Kristal | F | WA | US | 4 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 115410 | Wittrock | Timothy | M | TX | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 111310 | Wivell | Emily | F | VT | US | 8 | Vermont 100M 2025 (30 hours) |
| 127865 | Wlaschin | Craig | M | SC | US | 1 | Umstead 100M 2025 (30 hours) |
| 112798 | Wnorowski | Jim | M | CO | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 107162 | Wojta | Jill | F | Wisconsin | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 126914 | Wold | Ryan | M | CO | US | 1 | Bighorn 100M 2025 (35 hours) |
| 104368 | Wolf | Adam | M | CA | US | 32 | HURT 100M 2025 (36 hours) |
| 100672 | Wolf | Chad | M | OH | US | 16 | Twisted Branch 100km 2025 (20 hours) † |
| 105742 | Wolf | Jackson | M | MS | US | 4 | Cocodona 250M 2025 (125 hours) |
| 126106 | Wolf | Sam | M | Utah | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 110634 | Wolf | Torben | M | Lowersaxony | DE | 4 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 107733 | Wolfe | Chris | M | UT | US | 8 | Bighorn 100M 2025 (35 hours) |
| 122552 | Wolfe | Chris | M | Tennessee | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 127379 | Wolfe | Trevor | M | AZ | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 115770 | Wolfer | Kody | M | NY | US | 4 | Eastern States 100M 2025 (36 hours) |
| 126168 | Wolff | Casey | M | TX | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 103834 | Wolfgang | Jesse | M | NJ | US | 4 | Hellgate 100km 2024 (17 hours) |
| 123846 | Wolfs | Peer | M | Noord-Brabant | NL | 1 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 103848 | Wolodkin | Greg | M | MA | US | 8 | Pinhoti 100M 2025 (32 hours) † |
| 115057 | Wolosik | Anthony | M | DC | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 104999 | Woltering | Coree | M | Maine | US | 4 | Tarawera by UTMB 100M 2025 (36 hours) |
| 120670 | Won | Susan | F | California | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 102554 | Wong | Calvin | M | CA | US | 16 | Quicksilver 100km 2025 (17 hours) |
| 121849 | Wong | Hanson | M | Victoria | AU | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 111082 | Wong | Kylie | F | CA | US | 1 | Pine to Palm 100M 2025 (34 hours) † |
| 116997 | Wong | Roberta | F | Hong Kong | HK | 2 | TransLantau Ultra Trail by UTMB 100km 2024 (28 hours) |
| 127981 | Wong | Stanley | M | WA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 100175 | Wong | Yeung Ming Edmund | M | NA | HK | 8 | Penyagolosa 106km 2025 (26 hours) |
| 111342 | Woo | April | F | KY | US | 4 | Brazos Bend 100M 2024 (32 hours) |
| 122700 | Wood | Christopher | M | NY | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 121802 | Wood | Connor | M | Oregon | US | 2 | HURT 100M 2025 (36 hours) † |
| 101115 | Wood | Derek | M | FL | US | 32 | Bighorn 100M 2025 (35 hours) |
| 120308 | Wood | Guirong | F | TX | US | 2 | Dinosaur Valley 100M 2024 (35 hours) † |
| 103254 | Wood | Matthew | M | AUS | AU | 32 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 102727 | Wood | Preston | M | UT | US | 64 | Hardrock 100M 2025 (48 hours) † |
| 124743 | Wood | Sally | F | CA | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 110071 | Wood | Sommer | F | CA | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 127585 | Wood | Vinny | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 101192 | Woodall | Robert | M | NC | US | 32 | Hellgate 100km 2024 (17 hours) |
| 103378 | Woodall | Stephen | M | AZ | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 100566 | Woodard | Ben | M | GA | US | 32 | HURT 100M 2025 (36 hours) † |
| 127194 | Woodbury | Jamie | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 123768 | Woodfin | John | M | AL | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 119760 | Woodman | Nicolas | M | Provence-Alpes-Côte d'Azur | FR | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125026 | Woodruff | Chad | M | NJ | US | 1 | Eastern States 100M 2025 (36 hours) |
| 120936 | Woods | Paul | M | England | GB | 2 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 127648 | Woods | Tim | M | Victoria | AU | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 106123 | Woodside | Samantha | F | AZ | US | 16 | Zion 100km 2025 (19 hours) |
| 118055 | Woodward | Ali | F | CA | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 125018 | Wooley | Emily | F | ID | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 106001 | Woolley | Tim | M | WY | US | 16 | Bear, The 100M 2025 (36 hours) † |
| 124809 | Woolway | Thomas | M | NY | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 100451 | Wooten | Mark | M | TX | US | 128 | Dinosaur Valley 100M 2024 (35 hours) † |
| 121900 | Wootton | Michael | M | TX | US | 2 | Zion 100km 2025 (19 hours) |
| 111422 | Wopata | Scott | M | MN | US | 8 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 123962 | Worcester | Joseph | M | CA | US | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 124805 | Wortmann | Robert | M | Bavaria | DE | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 117790 | Wotherspoon | Megan | F | Saskatachewan | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 100882 | Woyth | Marilee | F | MT | US | 64 | Bighorn 100M 2025 (35 hours) |
| 117292 | Wright | Adam | M | BW | DE | 4 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 122005 | Wright | Angie | F | CO | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 124511 | Wright | Chris | M | OR | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 104478 | Wright | Chris | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 127987 | Wright | Dan | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 115370 | Wright | Darren | M | Indiana | US | 4 | Burning River 100M 2025 (30 hours) |
| 109333 | Wright | Eric | M | CO | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 125659 | Wright | Erik | M | MT | US | 1 | Vermont 100M 2025 (30 hours) |
| 125280 | Wright | Erik | M | ON | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 125793 | Wright | Garrett | M | PA | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 101771 | Wright | Jason | M | BC | CA | 16 | Beaverhead 100km 2025 (20 hours) |
| 102085 | Wright | Kaitlin | F | IN | US | 64 | Javelina Jundred 100M 2025 (30 hours) † |
| 102344 | Wright | Katie | F | NZL | NZ | 32 | Tarawera by UTMB 100M 2025 (36 hours) |
| 127097 | Wright | Will | M | CA | US | 1 | Angeles Crest 100M 2025 (36 hours) † |
| 112723 | Wrightson | Ian | M | Alberta | CA | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 105099 | Wrightson | Rachel | F | CA | US | 64 | Umstead 100M 2025 (30 hours) |
| 121429 | Wrigley | Steven | M | UT | US | 2 | Zion 100M 2025 (36 hours) † |
| 124793 | Wrobel | Sarah | F | LA | US | 1 | Mamba 100M 2024 (34 hours) † |
| 120737 | Wroblewski | Ashley | F | MI | US | 2 | Cascade Crest 100M 2025 (34 hours) |
| 111428 | Wu | Chris | M | WA | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 115241 | Wu | Di | M | Jilin | CN | 4 | Cocodona 250M 2025 (125 hours) |
| 125259 | Wu | Guang-an | M | WA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124256 | Wu | Max | M | Texas | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 106037 | Wu | Siqi | M | Jiangxi | CN | 256 | Crazy Mountain 100M 2025 (36 hours) † |
| 105278 | Wu | Weixing | M | CHN | CN | 16 | DL 100 106km 2025 (26 hours) |
| 122248 | Wu | Xiao | F | WA | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 113454 | Wu | Xu Dong | M | BC | CA | 8 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 124003 | Wu | Yongbo | M | Yunnan | CN | 1 | Mount Yun by UTMB - UMY 159.6km 2025 (48 hours) |
| 102149 | Wuennenberg | Joerg | M | DEU | DE | 16 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 hours) |
| 123811 | Wulff | Frederik | M | Copenhagen | DK | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 127025 | Wulff | Reggie | M | IN | US | 1 | Indiana 100M 2025 (30 hours) |
| 100963 | Wunder | Kenny | M | AL | US | 8 | Pinhoti 100M 2025 (32 hours) |
| 124060 | Wunschel | Luca | M | BW | DE | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 127678 | WURFEL | MARK | M | WA | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 117553 | Wurm | Christoph | M | NRW | DE | 2 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 101228 | Wuttke | Nawid | M | DEU | DE | 16 | Abbots Way 100km 2025 (22 hours) |
| 115005 | Wyant | Justin | M | Indiana | US | 2 | Zion 100M 2025 (36 hours) † |
| 108222 | Wyatt | Jake | M | CO | US | 16 | Bighorn 100M 2025 (35 hours) |
| 113524 | Wyatt | Josh | M | WA | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 110540 | Wycklendt | Matt | M | WI | US | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124942 | Wyman | Kat | F | Maryland | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 123208 | Wynn | JT | N | WY | US | 2 | Beaverhead 100km 2025 (20 hours) |
| 107983 | Wynne | Ricki | M | Leitrim | IE | 1 | Western States 100M 2025 (30 hours) † |
| 117165 | Wyse | Angela | F | IL | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 116776 | Xi | Hank | M | MA | US | 4 | Vermont 100M 2025 (30 hours) |
| 111288 | Xian | Jun | M | Ontario | CA | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 125980 | Xiang | Xinxin | F | Hubei | CN | 1 | Mount Yun by UTMB - UMY 159.6km 2025 (48 hours) |
| 109881 | Xiao | Yunguo | M | California | US | 16 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 126224 | Xie | Anqi | F | California | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 126329 | Xie | Guangtao | M | Sichuan | CN | 1 | Transjeju by UTMB 150km 2025 (37 hours) |
| 120067 | xie | liansheng | M | guangdong | CN | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 125153 | Xie | Qiulin | M | CA | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 119302 | Xiong | Weiran | M | CA | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 117007 | XIONG | YONGGANG | M | Beijing | CN | 2 | Nike ACG Ultra-Trail Chongli 100km 2025 (29 hours) |
| 124675 | XU | Buqin | F | lyon | FR | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 122285 | Xu | Dongsheng | M | Heilongjiang | CN | 2 | Malaysia Ultra Trail by UTMB 100km 2024 (26 hours) |
| 125873 | Xu | Luojun | M | ZHEJIANG | CN | 1 | TransLantau Ultra Trail by UTMB 100km 2024 (28 hours) |
| 108135 | Yabe | Shuji | M | Tokyo | JP | 16 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 109345 | Yada | Hiromu | M | Tokyo | JP | 8 | OSJ Ontake 100km 2025 (20 hours) |
| 101974 | Yadav | Kunal | M | GBR | GB | 8 | Autumn 100M 2025 (28 hours) |
| 126991 | Yagi | Keita | M | Tokyo | JP | 1 | Okushinano 100km 2025 (21 hours) |
| 120884 | Yagüe Sabido | Sandra | F | Guadalajara | ES | 2 | Gran Trail Peñalara 110km 2025 (25 hours) |
| 120734 | Yakovlev | Dmitry | M | NY | US | 2 | Moab 238M 2025 (108 hours) |
| 104446 | Yamada | Takeshi | M | HI | US | 16 | HURT 100M 2025 (36 hours) † |
| 110949 | YAMAMOTO | KAZUTOMO | M | TOKYO | JP | 4 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 109929 | Yamamoto | Sam | M | AB | CA | 4 | Lost Soul Ultra 100M 2025 (33 hours) † |
| 126972 | yamamoto | takashi | M | kanagawa | JP | 1 | Lake Biwa 100M 2025 (52 hours) |
| 126817 | Yamasaki | Kayo | F | Tokyo | JP | 1 | TOR130 - Tot Dret 130km 2025 (44 hours) |
| 123325 | Yamasaki | kiichiro | M | Tokyo | JP | 2 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 102733 | Yamashita | Makiko | F | CA | US | 256 | Canyons by UTMB 104km 2025 (20 hours) |
| 111216 | YAMAZAKI | KOJI | M | OSAKA-prefecture | JP | 8 | Mt Fuji 100M 2025 (46 hours) |
| 112501 | Yamazaki | Takahiro | M | Tokyo | JP | 4 | FunTrails Chichibu & Okumusashi 105km 2024 (30 hours) |
| 104315 | Yan | Eric | M | OR | US | 8 | Crazy Mountain 100M 2025 (36 hours) † |
| 122121 | Yan | Guiping | M | Guang Dong | CN | 2 | Mount Yun by UTMB - UMY 159.6km 2025 (48 hours) |
| 117407 | YANAGI | YUICHI | M | saitama | JP | 4 | Okushinano 100km 2025 (21 hours) |
| 106247 | Yanagihashi | Shizuka | M | JPN | JP | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 110068 | Yanchuk | Michael | M | RI | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 126155 | Yanda | Alan | N | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 121922 | Yane | Walker | M | MO | US | 2 | HOKA Bandera 100km 2025 (17 hours) |
| 125605 | Yanes-Lukin | Paula | F | NJ | US | 1 | Eastern States 100M 2025 (36 hours) |
| 126626 | Yanez | Jose | M | NEW MEXICO | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 103515 | Yang | Fuchyi | M | CA | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 105724 | Yang | Henry | M | SGP | SG | 16 | Pulag Ultra Trail (PUT) 132km 2025 (40 hours) |
| 119690 | yang | jing | M | Ontario | CA | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124996 | Yang | Kevin | M | MA | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 123920 | Yang | Lei | M | ON | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 125893 | Yang | Man | F | California | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 113319 | Yang | Mei | F | CA | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 123854 | Yang | Ming-Hsiu | M | New Taipei City | TW | 1 | Formosa Trail 104km 2024 (28 hours) |
| 122183 | Yang | Tao | M | MA | US | 2 | Mount Yun by UTMB - UMY 159.6km 2025 (48 hours) |
| 125507 | YANG | XIAOFEI | M | Guangdong | CN | 1 | Chiangmai by UTMB Elephant 100km 2024 (22 hours) |
| 105003 | Yanick | Miles | M | WA | US | 16 | Cascade Crest 100M 2025 (34 hours) |
| 105668 | Yanuck | Justin | M | CA | US | 256 | Javelina Jundred 100M 2025 (30 hours) † |
| 120352 | Yao | Jessica | F | New York | US | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 127220 | YAO | JIAN | M | GUANGDONG | CN | 1 | Trail du Saint-Jacques by UTMB 130km 2025 (28 hours) |
| 120156 | Yao | Tuduo | M | NRW | DE | 2 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 121283 | Yao | Wei | M | Shanghai | CN | 2 | Mt Fuji 100M 2025 (46 hours) |
| 127373 | Yap | Mario Raymund | M | Davao Region | PH | 1 | Trail des Gombak 100km 2025 (30 hours) |
| 123963 | Yardley | Lewis | M | Staffordshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 127623 | Yaremko | Dale | M | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 106513 | Yarris | Lainie | F | OR | US | 16 | Mountain Lakes 100M 2025 (30 hours) † |
| 113543 | YASUDA | YOSHIHISA | M | aichi | JP | 8 | Hardcore Ultra Trail (HUT) 100M 2025 (44 hours) |
| 120230 | Yatsynych | Andriy | M | Ontario | CA | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 122813 | Yau | Brian | M | Ca | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125959 | Yau | Cheuk Hin Victor | M | Hong Kong | HK | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 122413 | Yawichai | Prayoon | M | Bangkok | TH | 2 | Pong Yaeng Trail 100km 2025 (31 hours) |
| 103684 | Yawn | Caleb | M | GA | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 122290 | Ye | Sangkuk | M | SEONGDONG-GU | KR | 2 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 115346 | Yeager | Brian | M | Maryland | US | 4 | Vermont 100km 2025 (17 hours) |
| 124301 | Yeaman | Jennifer | F | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) † |
| 125402 | Yeardley | James | M | England | GB | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124303 | Yeary | Sam | M | Indiana | US | 1 | Zion 100km 2025 (19 hours) |
| 123129 | Yee | Victor | M | California | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 100926 | Yerkes | Todd | M | UT | US | 16 | Rio Del Lago 100M 2025 (30 hours) |
| 113029 | Yeung | Ho Yin | M | Hong Kong | HK | 2 | TransLantau Ultra Trail by UTMB 120km 2024 (36 hours) |
| 115267 | Yhooyued | Kittipong | M | Pathum Thani | TH | 4 | Pong Yaeng Trail 160km 2025 (48 hours) |
| 124223 | Yi | Junxiao | M | New Jersey | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 111065 | Yi | Rongxiang | F | California | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 122339 | Yip | Anna | F | CA | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 117750 | Yip | Tak Ho | M | Hong Kong | HK | 4 | Hong Kong 100K 100km 2025 (23 hours) |
| 119849 | Yliniemi | Laurie | F | Minnesota | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 127549 | Yoder | Levi | M | OH | US | 1 | Javelina Jundred 100M 2025 (30 hours) |
| 121198 | Yogo | Hiroshi | M | Tochigi-ken | JP | 2 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 110969 | Yokel | Danielle | F | CA | US | 4 | Pine to Palm 100M 2025 (34 hours) † |
| 115155 | Yokota | Hiroyuki | M | Japan | JP | 2 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 103812 | Yokota | Tokuyasu | M | JPN | JP | 4 | Okushinano 100km 2025 (21 hours) |
| 121196 | YOKOYAMA | MASATO | M | Kanagawa-Ken | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 115286 | yokoyama | shinsuke | M | kanagawa | JP | 4 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 114409 | Yokoyama | Takashi | M | Hyogo | JP | 4 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 126318 | Yoon | Hanchul | M | QLD | AU | 1 | Guzzler Ultra 100km 2025 (24 hours) |
| 115197 | Yoon | Seawon | M | Auckland | NZ | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 119582 | Yoshida | Makoto | M | Shiga | JP | 2 | OSJ Ontake 100km 2025 (20 hours) |
| 120438 | YOSHIHIRO | KOGA | M | Kyoto Prefecture | JP | 2 | OSJ Ontake 100M 2025 (24 hours) |
| 123318 | Yoshikawa | Hiroki | M | Fukuoka | JP | 2 | Shinetsu Five Mountains Trail 110km 2025 (22 hours) |
| 123635 | Yoshikawa | Ryo | M | Indiana | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 115950 | Yoshikawa | Sosuke | M | Tokyo | JP | 2 | Fat Dog 120M 2025 (48 hours) † |
| 117536 | Yoshikawa | Toshiyuki | M | Koto-ku | JP | 4 | Tarawera by UTMB 100M 2025 (36 hours) |
| 116330 | You | Yang | F | British Columbia | CA | 1 | Mt Fuji 100M 2025 (46 hours) |
| 109010 | Young | Arden | F | Alberta | CA | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 125804 | Young | Evan | M | California | US | 1 | Quicksilver 100km 2025 (17 hours) † |
| 102452 | Young | Glen | M | BC | CA | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 102835 | Young | Joseph | M | CA | US | 16 | Zion 100km 2025 (19 hours) |
| 120969 | Young | Kelly | F | BC | CA | 2 | Fat Dog 100km 2025 (24 hours) |
| 110008 | Young | Mark | M | WA | US | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 113796 | Young | Matthew | M | WV | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 125758 | Young | Nathan | M | OH | US | 1 | Bighorn 100M 2025 (35 hours) |
| 110340 | Young | Paul | M | Washington | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 109167 | Young | Phil | M | Iowa | US | 16 | Tunnel Hill 100M 2024 (30 hours) † |
| 100962 | Youngblood | Carol | F | OH | US | 2 | Mohican 100M 2025 (32 hours) |
| 121348 | Youngfleish | Brier | F | CO | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 124795 | Yourkiewicz | Thomas | M | Ohio | US | 1 | Mohican 100M 2025 (32 hours) |
| 110837 | Yousling | David | M | Id | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 113629 | Yu | Haiming | M | CA | US | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 127229 | Yu | Hongjun | M | Beijing | CN | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 127401 | Yu | Siwei | M | Guangdong | CN | 1 | DL 100 106km 2025 (26 hours) |
| 127122 | Yu | Wei | F | NSW | AU | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 120636 | Yuan | YiQiong | F | CA | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 124177 | Yum | Leon | M | Île de France | FR | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 103783 | Yuronich | Brad | M | OH | US | 64 | Transgrancanaria 125km 2025 (28 hours) |
| 111645 | Yuronich | Brittney | F | OH | US | 8 | Transgrancanaria 125km 2025 (28 hours) |
| 122373 | Yuska | Timothy | M | IL | US | 2 | Tunnel Hill 100M 2024 (30 hours) † |
| 125442 | Zabinsky | Andrey | M | MD | US | 1 | Hellgate 100km 2024 (17 hours) |
| 122333 | Zabrodsky | Dusan | M | Severni Cechy | CZ | 2 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 125802 | Zahra | Talia | F | FL | US | 1 | Bigfoot 206M 2025 (100 hours) † |
| 123000 | Zahrly | Daniel | M | Tennessee | US | 1 | Mamba 100M 2024 (34 hours) † |
| 112124 | Żak | Paweł | M | POL | PL | 8 | Łemkowyna Ultra-Trail 150km 2025 (35 hours) |
| 126044 | Zambelli | Stefano | M | Italia | IT | 1 | Abbots Way 100km 2025 (22 hours) |
| 105180 | Zambon | Alessio | M | ITA | IT | 32 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 117324 | Zamboni | Matteo | M | Italia | IT | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 127600 | Zamora | Raul | M | CA | US | 1 | Rio Del Lago 100M 2025 (30 hours) |
| 109013 | Zamzow | Ben | M | MI | US | 8 | Vermont 100km 2025 (17 hours) |
| 123636 | Zandona | Michele | F | NY | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 103206 | Zaney | Greg | M | TX | US | 16 | Zion 100km 2025 (19 hours) |
| 115223 | Zanovello | Giulia | F | Varese | IT | 2 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 127331 | Zapata Lagunes | Adolfo Axel | M | CDMX | MX | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 105658 | Zapor | Andrew | M | TN | US | 2 | Hellgate 100km 2024 (17 hours) |
| 123891 | Zarate | Christopher | M | VA | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 120314 | Zardini | Matteo | M | Verona | IT | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 113896 | Zastawniak | Chris | M | NV | US | 8 | Rim to River 100M 2025 (32 hours) † |
| 105148 | Zatyko | Zeke | M | CA | US | 64 | Tunnel Hill 100M 2024 (30 hours) † |
| 108171 | Zavatchan | John | M | PA | US | 4 | Eastern States 100M 2025 (36 hours) |
| 102573 | Zay | David | M | HUN | HU | 8 | Salomon Ultra-Trail Hungary 112km 2025 (20 hours) |
| 121307 | Zbrozek | Michael | M | New Mexico | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 120125 | Zdancewic | Megan | F | WA | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 127755 | Zdrojewska | Joanna | F | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 107677 | Zehetleitner | Christoph | M | Bavaria | DE | 2 | Zugspitz 106km 2025 (25 hours) |
| 108324 | Zeiler | Lotti | F | TX | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 127788 | Zelaya | Matthew | M | New jersey | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 118766 | Zenz | Alice | F | Niederösterreich | AT | 2 | Ultra Trail Vipava Valley 106km 2025 (25 hours) |
| 100252 | Zeppettella | Aneta | F | OH | US | 8 | HURT 100M 2025 (36 hours) † |
| 125348 | Zerna | Justin | M | Queensland | AU | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 125329 | Zerna | Kristin | F | Queensland | AU | 1 | Tarawera by UTMB 102km 2025 (17 hours) |
| 119874 | Zes | Timothy | M | MO | US | 2 | Black Canyon 100km 2025 (17 hours) |
| 118767 | Zgrabik | Andrew | M | OH | US | 2 | Canal Corridor 100M 2025 (30 hours) † |
| 113375 | Zhang | Alex | M | NY | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 104619 | Zhang | Baoping | M | AUS | AU | 4 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 127777 | Zhang | Corina | F | WA | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 120286 | Zhang | Guanqing | M | Fujian | CN | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 117668 | Zhang | Michael | M | WA | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 125441 | Zhang | Michelle | F | CO | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 127562 | Zhang | Qi | M | CA | US | 1 | San Diego 100M 2025 (32 hours) † |
| 117014 | Zhang | Qiang | M | CA | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 127828 | Zhang | Shun | M | Shanghai | CN | 1 | DL 100 106km 2025 (26 hours) |
| 117230 | Zhang | Shuyang | M | Shandong | CN | 4 | Mount Yun by UTMB - UMY 159.6km 2025 (48 hours) |
| 121001 | Zhang | Tony | M | Minnesota | US | 2 | Mountain Lakes 100M 2025 (30 hours) † |
| 116412 | Zhang | Wei | F | CA | US | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 125224 | Zhang | Wentao | M | WA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 127212 | Zhang | Xi | M | china | US | 1 | Ninghai Ultra Trail 109km 2025 (24 hours) |
| 123965 | Zhang | Xiaonan | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 101728 | Zhang | Xu | M | CA | US | 32 | Nike ACG Ultra-Trail Chongli 168km 2025 (48 hours) |
| 123711 | Zhang | Yanbo | M | MA | US | 1 | Vermont 100M 2025 (30 hours) |
| 119688 | zhang | yehan | M | sh | CN | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 123850 | Zhang | Yuting | F | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 121814 | Zhao | Emma | F | VA | US | 2 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 127423 | ZHAO | FEI | M | BEIJING | CN | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 111962 | Zhao | Meng | M | TX | US | 4 | HOKA Chiang Mai Thailand by UTMB Trans-Int 160 175km 2024 (48 hours) |
| 121407 | Zhao | Ming | M | ON | CA | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 127914 | Zhao | ShunNai | M | Victoria | AU | 1 | Surf Coast Century 100km 2025 (17 hours) |
| 123071 | Zhao | Xintao | M | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 124351 | Zhao | Yang | M | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 121012 | Zhao | Yanping | F | CA | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 121526 | Zhong | Karen | F | New Jersey | US | 2 | Cascade Crest 100M 2025 (34 hours) |
| 123921 | ZHONG | ZHEXIONG | M | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 124458 | Zhou | Joyce | F | Colorado | US | 1 | Never Summer 100km 2025 (23 hours) |
| 125633 | Zhou | Roy | M | New York | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 127224 | ZHOU | YANG | M | Shanghai | US | 1 | Ninghai Ultra Trail 109km 2025 (24 hours) |
| 123705 | zhou | zhou | M | BC | CA | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 103367 | ZHU | Chaoyang | M | CHN | CN | 32 | DL 100 106km 2025 (26 hours) |
| 119757 | Zhu | Lidan | F | ON | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 126325 | Zhu | Tianhui | F | Shanghai | CN | 1 | DL 100 106km 2025 (26 hours) |
| 116494 | Zhu | Tong | M | CA | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 102532 | Zibert | Dejan | M | SVN | SI | 4 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 121953 | Zickefoose | Brian | M | NC | US | 2 | Umstead 100M 2025 (30 hours) |
| 118007 | Zickevicius | Rokas | M | Oregon | US | 2 | Rio Del Lago 100M 2025 (30 hours) |
| 107393 | Ziegenmeyer | Logan | M | California | US | 16 | Quicksilver 100km 2025 (17 hours) † |
| 122429 | Ziegenmeyer | Todd | M | CA | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 127274 | Ziegler Jr | William | M | AR | US | 1 | Mamba 100M 2024 (34 hours) † |
| 115820 | Ziemainz | Rene | M | Brandenburg | DE | 4 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 126773 | Ziemer | Bryce | M | Minnesota | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 119030 | Ziesemer | Zach | M | WI | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 121352 | Ziesmer | Rebekah | F | IL | US | 2 | Kettle Moraine 100M 2025 (30 hours) |
| 126802 | Zigich | Matthew | M | MI | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 127668 | Zimmerman | Eric | M | Texas | US | 1 | Rocky Raccoon 100M 2025 (30 hours) |
| 122831 | zimmerman | zerek | M | CA | US | 2 | Angeles Crest 100M 2025 (36 hours) |
| 125920 | Zimmermann | Simon | M | Luzern | CH | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 113904 | Zimnowski | Chris | M | Colorado | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 123641 | Zinani | Juan Pablo | M | Buenos Aires | AR | 1 | Patagonia 100M 2025 (42 hours) |
| 116347 | Zinner | Greg | M | NC | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 125781 | Zinno | Gianmarco | M | Quebec | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 117990 | Zioto | Kathryn | F | MA | US | 2 | Cascade Crest 100M 2025 (34 hours) |
| 124940 | Zittlau | William | M | BC | CA | 1 | Saddles 100M 2025 (34 hours) † |
| 112255 | Znotins | Brian | M | AB | CA | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 125436 | Zoller | Andrew | M | MA | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 120807 | Zollinger | Matthew | M | UT | US | 2 | Wasatch Front 100M 2025 (36 hours) † |
| 125765 | Zornes | Sheryl | F | British Columbia | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 124388 | Zou | Xiaodong | F | WA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124939 | Zsoldos | Chelsea | F | NC | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 120296 | Zubia | Mannie | M | CA | US | 2 | Angeles Crest 100M 2025 (36 hours) |
| 127195 | Zuchowski | Tom | M | OH | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 127345 | Zuckerberg | Randi | F | NY | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 118381 | Zuech | Kevin | M | NJ | US | 2 | Burning River 100M 2025 (30 hours) |
| 119290 | Zuellig | Dennis | M | ZH | CH | 1 | Swiss Canyon Trail 100M 2025 (44 hours) |
| 115229 | Zufelde | Markus | M | Hessen | DE | 2 | Zugspitz 100M 2025 (48 hours) |
| 125107 | Zuidema | Mitch | M | Minnesota | US | 1 | Superior 100M 2025 (38 hours) † |
| 112956 | Zukowska | Joanna | F | BW | DE | 4 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 116069 | Zuniga | Joanna | F | California | US | 2 | Sean O'Brien 100km 2025 (17 hours) † |
| 126943 | Zuniga | Victor | M | San Jose | CR | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 122131 | Zupan | Primoz | M | Slovenia | SI | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 116047 | Zuzulock | Sarah | F | MT | US | 4 | Cuyamaca 100km 2025 (17 hours) † |
| 106208 | Zyduck | Tammy | F | WI | US | 4 | Kettle Moraine 100M 2025 (30 hours) † |
| 120114 | ZYGOMANIS | MICHAIL | M | FLORINA | GR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 122210 | Zylker | Adelina | F | Ca | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123959 | Zysko | Tomasz | M | Mazowieckie | PL | 1 | Łemkowyna Ultra-Trail 150km 2025 (35 hours) |
| 123493 | テラダ | 次郎 | M | 島仁 | JP | 1 | Aso Volcano Trail 115km 2025 (28 hours) |
| 127731 | 井上 | 竜一 | M | 福井県 | JP | 1 | Okushinano 100km 2025 (21 hours) |
† - Qualifier matched by published results and entrants lottery email.
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