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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 |
|---|---|---|---|---|---|---|---|
| 101757 | ≈†Váb | Hubert | M | CZE | CZ | 2 | Krakonosova Stovka 100km 2025 (22 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) |
| 111206 | Abolfathi | Maryam | F | California | US | 8 | Leona Divide 100M 2025 (33 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) |
| 118204 | Adams | Gregory | M | Georgia | US | 2 | Yeti Virginia 100M 2025 (30 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) |
| 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) |
| 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) |
| 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) |
| 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) |
| 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) |
| 101787 | Aho | Janne | M | SWE | SE | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 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) † |
| 115240 | Aitelhocine | Fabrice | M | Ile De France | FR | 4 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 105261 | Aizawa | Yuuki | M | JPN | JP | 16 | Lake Biwa 100M 2025 (52 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) † |
| 124794 | Alberghini | Jeffrey | M | WI | US | 1 | Hennepin 100M 2025 (30 hours) |
| 106536 | Alevisos | Georg | M | GRC | GR | 64 | Okushinano 100km 2025 (21 hours) |
| 123976 | Alexandre | Demagny | M | Rhone | FR | 1 | Kerry Way Ultra 193km 2025 (40 hours) |
| 111321 | Alfaro | Manuel | M | Flores | CR | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 101084 | Alimonos | Costa | M | OH | US | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 107522 | Allen | Chad | M | Wa | US | 16 | IMTUF 100M 2025 (36 hours) † |
| 123950 | Allen | Dion | M | Queensland | AU | 1 | Blackall 100km 2025 (18 hours) |
| 120093 | Allen | Krista | F | Ontario | CA | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 110500 | Allen | Nick | M | California | US | 16 | Angeles Crest 100M 2025 (36 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) † |
| 117540 | Almond | Christine | F | BC | CA | 4 | Sedona Canyons 125M 2025 (52 hours) |
| 100396 | Alsip | Jonathan | M | MI | US | 16 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 123970 | Altach | Johannes | M | Niedersachsen | DE | 1 | Mozart by UTMB 119km 2025 (23 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) |
| 124611 | Aman | Ian | M | Alberta | CA | 1 | Tahoe 202M 2025 (100 hours) † |
| 117866 | Amato | Anthony | M | New Jersey | US | 2 | Hellbender 100M 2025 (40 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) † |
| 114586 | Ammons | Kim | F | CA | US | 2 | Sean O'Brien 100km 2025 (17 hours) † |
| 114925 | Anders | Jette | F | Hessen | DE | 4 | Tuscany Crossing 103km 2025 (21 hours) |
| 118925 | Anderson | Daniel | M | OK | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 106679 | Anderson | Janice | F | GA | US | 16 | Tunnel Hill 100M 2024 (30 hours) † |
| 104233 | Anderson | Katy | F | NSW | AU | 8 | 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) † |
| 124323 | Anderson | Peter | M | Ohio | US | 1 | Burning River 100M 2025 (30 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) † |
| 121329 | Andersson | Erik | M | New York | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 111263 | Andreas | Justin | M | Alaska | US | 8 | Kettle Moraine 100M 2025 (30 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) † |
| 103636 | Andrews | Glen | M | AUS | AU | 8 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 109940 | Andric | Mirko | M | Massachusetts | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 114872 | Andrzejewski | Karl | M | Texas | US | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 122066 | Ange | Serradji | M | Auvergne-Rhône-Alpes | FR | 2 | Nice Côte d'Azur by UTMB 159km 2025 (48 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) |
| 111353 | Angwin | Marcus | M | Victoria | AU | 4 | Surf Coast Century 100km 2025 (17 hours) |
| 109275 | Anleu | Erick | M | Guatemala | GT | 2 | Grindstone by UTMB 100M 2025 (36 hours) |
| 124205 | Applekamp | Andrew | M | MT | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 123975 | Aradori | Federico | M | Italy | IT | 1 | Tuscany Crossing 103km 2025 (21 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) |
| 107180 | Ard | Mike | M | MT | US | 16 | Indiana 100M 2025 (30 hours) |
| 108491 | Arias Resco | Jorge | M | Madrid | ES | 8 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 124727 | Ariso | Sofian | M | Quebec | CA | 1 | Quebec Mega Trail 135km 2025 (32 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) |
| 103334 | Arnold | Melissa | F | MA | US | 2 | Vermont 100M 2025 (30 hours) |
| 119630 | Aron | Erika | F | CA | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 118069 | Arreola | Alejandro | M | Washington | US | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 124424 | Arriagada | Pete | M | IL | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 124412 | Arrowsmith | Adam | M | OR | US | 1 | Waldo 100km 2025 (18 hours) † |
| 121271 | Arthur | Anthony | M | Virginia | US | 2 | Grindstone by UTMB 100M 2025 (36 hours) |
| 116104 | Arthur | Nikki | F | Douglas | IM | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 115083 | Arzenton | Ivo | M | Veneto | IT | 4 | Nuts Ylläs Pallas 160km 2025 (35 hours) |
| 123898 | Asano | Koichi | M | Chiba | JP | 1 | Okushinano 100km 2025 (21 hours) |
| 120679 | Ashby | Graham | M | ON | CA | 2 | Sulphur Springs 100M 2025 (30 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) |
| 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) |
| 119036 | Asseer | Rudi | M | ON | CA | 2 | Grindstone by UTMB 100M 2025 (36 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) † |
| 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) |
| 114067 | Atterberry | Emory | M | Texas | US | 8 | Leadville Trail 100M 2025 (30 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) |
| 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) † |
| 124796 | Auth | Chris | M | WA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 124720 | AUTUORI SPITZ | GUILHERME | M | RIO DE JANEIRO | BR | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 105388 | Avdeeva | Kseniia | F | Almaty | KZ | 16 | Salomon Ultra-Trail Hungary 112km 2025 (20 hours) |
| 120811 | AVERY | WAYNE | M | England | GB | 2 | Penyagolosa 106km 2025 (26 hours) |
| 117552 | Axelle | Nardoux | F | Haute Savoie | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 116651 | Axsom | Kalo | M | FL | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 118315 | Ayres | James | M | TX | US | 2 | Dinosaur Valley 100km 2024 (22 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) |
| 124275 | Baccarani | Gabriella | F | Panama | PA | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 106683 | Bachman | Tod | M | 2 | High Lonesome 100M 2025 (37 hours) | ||
| 124711 | Backhurst-Braye | Mike | M | Surrey | GB | 1 | North Downs Way 100M 2025 (30 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) † |
| 102731 | Bailey | Chad | M | TX | US | 32 | No Business 100M 2025 (34 hours) |
| 103311 | Bainbridge | Andrew | M | CO | US | 4 | Hardrock 100M 2025 (48 hours) † |
| 123546 | Baird | Andrew | M | NY | US | 1 | Zion 100M 2025 (36 hours) † |
| 114190 | Baird-Murray | David Justin | M | Powys | GB | 4 | Autumn 100M 2025 (28 hours) |
| 115299 | Baker | Buck | M | TX | US | 1 | Western States 100M 2025 (30 hours) † |
| 124635 | Baker | Jennifer | F | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 115070 | Baker | Mark | M | Auckland | NZ | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 124681 | Baker | Sarah | F | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 124097 | Bakker | Rob | M | South Holland | NL | 1 | SwissPeaks 100km 2025 (28 hours) |
| 124086 | Baldasare | Joseph | M | New Jersey | US | 1 | Vermont 100km 2025 (17 hours) |
| 123716 | Baldo | Natalie | F | BC | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 101451 | Baldwin | Scott | M | PA | US | 64 | Vermont 100km 2025 (17 hours) |
| 108823 | Balestrieri | Daniel | M | MA | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 107160 | Ball | Alex | M | SC | US | 8 | Kettle Moraine 100M 2025 (30 hours) |
| 119113 | Ball | Joshua | M | MI | US | 4 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 106689 | Ball | Wayne | M | MA | US | 128 | Vermont 100M 2025 (30 hours) |
| 105611 | Baltieri | Fabio | M | ITA | IT | 8 | Lake Biwa 100M 2025 (52 hours) |
| 102027 | Banaszak | Nicholas | M | CA | US | 128 | Pine to Palm 100M 2025 (34 hours) † |
| 103219 | Banel | Paul | M | CO | US | 32 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 102846 | Banh | Hoa | F | AUS | AU | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 107181 | Banks | Trevor | M | CO | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 101195 | Banta | Jacob | M | CO | US | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 120645 | Baracco | Alberto | M | Italy | IT | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 120489 | Barber | Caleb | M | WA | US | 2 | TOR330 - Tor de Géants 330km 2025 (132 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) |
| 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) † |
| 100764 | Baris | Laney | F | NJ | US | 1 | Hellbender 100M 2025 (40 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) † |
| 121702 | Barnickel | Harald | M | Bavaria | DE | 2 | Mozart by UTMB 119km 2025 (23 hours) |
| 113142 | Barr | Shawn | M | CA | US | 8 | Cuyamaca 100km 2025 (17 hours) † |
| 121221 | Barra | Andrea | M | CN | IT | 2 | Tuscany Crossing 103km 2025 (21 hours) |
| 104282 | Barrett | Andrew | M | FL | US | 64 | Javelina Jundred 100M 2025 (30 hours) |
| 100424 | Barrett | Wade | M | TX | US | 32 | California Fall Classic at Lake Sonoma 100km 2025 (19 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) |
| 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) |
| 121487 | Bartholomew | Joseph | M | Utah | US | 1 | Rocky Raccoon 100M 2025 (30 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) |
| 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) |
| 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) |
| 110010 | Basu | Ekta | F | CA | US | 4 | Javelina Jundred 100M 2025 (30 hours) |
| 101385 | Batchelor | Eric | M | CA | US | 8 | HURT 100M 2025 (36 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) |
| 119855 | Batz | Christian | M | Bavaria | DE | 2 | Swiss Alps 100M 2025 (50 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) † |
| 124264 | Baumer | Grace | F | Colorado | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 124490 | Bawden | John | M | AZ | US | 1 | Crazy Mountain 100M 2025 (36 hours) † |
| 118289 | Baxter | Dean | M | NSW | AU | 4 | Kosciusko by UTMB 100km 2024 (23 hours) |
| 122109 | Baylis | Patrick | M | BC | CA | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 123570 | Bazhutkin | Andrey | M | Victoria | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 124800 | Beach | Adam | M | Greater London | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 123508 | Beard | David | M | South Glos | GB | 1 | South Downs Way 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) † |
| 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) |
| 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) |
| 124411 | Beck | Daniel Kim | M | - | DK | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124698 | Becker | Saskia | F | NM | US | 1 | Javelina Jundred 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) † |
| 100486 | Begic | Kristijan | M | CT | US | 1 | Western States 100M 2025 (30 hours) † |
| 124167 | Belisle | Scott | M | CT | US | 1 | Vermont 100M 2025 (30 hours) |
| 124685 | Bell | Ian | M | CA | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 119920 | Bellows | Chris | M | Maine | US | 2 | C & O Canal 100M 2025 (30 hours) † |
| 124241 | Beltramo | Ethan | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 114862 | Benard | Valentin | M | Ariege | FR | 2 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 108238 | Bendt | Mike | M | SD | US | 8 | Wasatch Front 100M 2025 (36 hours) † |
| 124770 | Bennett | Jackson | M | Illinois | US | 1 | Arkansas Traveler 100M 2025 (30 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) † |
| 121836 | Benson | Adam | M | WY | US | 2 | Crazy Mountain 100M 2025 (36 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) † |
| 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) |
| 111775 | Bergman | Joshua | M | Alberta | CA | 8 | Fat Dog 120M 2025 (48 hours) † |
| 124632 | bergstrom | nicole | F | wa | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 123778 | Bermingham | Matthew | M | PA | US | 1 | Worlds End 100km 2025 (19 hours) |
| 123934 | Bernal | Paul | M | Pichincha | EC | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 108758 | Bernard | Yannick | M | QC | CA | 16 | Grindstone by UTMB 100M 2025 (36 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) † |
| 124574 | Berry | Kimberly | F | MD | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 115420 | Berry | Robert | M | Tennessee | US | 4 | Mamba 100M 2024 (34 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) † |
| 108343 | Betten | Sebastian | M | QLD | AU | 16 | Guzzler Ultra 100km 2025 (24 hours) |
| 111939 | Betz | Craig | M | FL | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 114746 | Beverly | Robert | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 123983 | Bezant | Amy | F | Haute Savoie | FR | 1 | Swiss Alps 100M 2025 (50 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) |
| 111696 | Bielby | William | M | Greater London | GB | 4 | Tarawera by UTMB 102km 2025 (17 hours) |
| 124757 | Bieser | Oliver | M | OH | US | 1 | Rabid Raccoon 100M 2025 (36 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 | Black Canyon 100km 2025 (17 hours) † |
| 121696 | Binhammer | Mead | M | Vermont | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 114206 | Binlich | Jean-Manuel | M | France | FR | 2 | Gran Trail Courmayeur 100km 2025 (28 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) † |
| 120113 | Black | Anna | F | TX | US | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 100591 | Blaha | Martin | M | CZE | CZ | 32 | Transgrancanaria 125km 2025 (28 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) † |
| 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) † |
| 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) † |
| 103982 | Blatecky | Andy | M | CO | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 122278 | Blawat | Patrick | M | WI | US | 2 | Hennepin 100M 2025 (30 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) |
| 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) |
| 124450 | Bloomquist | Eric | M | Il | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 115658 | Blossom | Jarrod | N | MI | US | 4 | Gorge Waterfalls 100km 2025 (18 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) |
| 111924 | Boelk | Michael | M | Minnesota | US | 4 | Indiana 100M 2025 (30 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) † |
| 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) |
| 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) |
| 124582 | Bolos | Kaydi | F | UT | US | 1 | Zion 100km 2025 (19 hours) |
| 107659 | Bolton | Ryan | M | QLD | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 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) |
| 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) † |
| 124448 | Bonnet | Geoffroy | M | Haute-Savoie | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 112420 | Boone | Melanie | F | CA | US | 8 | Sean O'Brien 100km 2025 (17 hours) |
| 112605 | Borden | Kortnee | M | Ontario | CA | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 109655 | Bordenave | Garrett | M | CA | US | 16 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 123784 | Borland | Karla | F | Hampshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 124304 | Borowski | Michael | M | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 116894 | Bosredon | Anthony | M | Quebec | CA | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124593 | Bost | Ian | M | TX | US | 1 | HOKA Bandera 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) |
| 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) |
| 122344 | Bounemoura | Abed | M | Paris | FR | 2 | Grand Raid des Pyrénées - Tour de Cirques 123km 2025 (40 hours) |
| 115375 | Bourges | Gwendal | M | Bretagne | FR | 4 | SwissPeaks 360km 2025 (156 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) † |
| 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) |
| 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) |
| 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) † |
| 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) |
| 115433 | Boyd | Andrew | M | Pennsylvania | US | 4 | Laurel Highlands 70.5M 2025 (20 hours) |
| 123564 | Boyer | Maxime | M | Saint Pierre et Miquelon | FR | 1 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 123473 | Braa | Mats | M | Trondelag | NO | 1 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 111271 | Bradea | Benjamin | M | OR | US | 8 | Cuyamaca 100km 2025 (17 hours) |
| 114854 | Bradley | Tim | M | Lincolnshire | GB | 4 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 100771 | Bradner | Aaron | M | VA | US | 32 | No Business 100M 2025 (34 hours) |
| 112378 | Brady | Ryan | M | CA | US | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 117188 | Bragg | James | M | North Carolina | US | 4 | No Business 100M 2025 (34 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) † |
| 124442 | Brandhorst-Satzkorn | Johan | M | BC | CA | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 110771 | Brandner | Erik | M | Minnesota | US | 16 | Leadville Trail 100M 2025 (30 hours) |
| 109056 | Brandt | Eric | M | MN | US | 16 | Canyons by UTMB 104km 2025 (20 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) |
| 120774 | Braun | Mark | M | Oregon | US | 2 | Javelina Jundred 100M 2025 (30 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) |
| 119327 | Breakwell | Rich | M | Shropshire | GB | 2 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 124651 | BREGEON | Matthieu | M | Basel Stadt | CH | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 111046 | Breitschwerdt | Kate | F | CA | US | 1 | Leona Divide 100km 2025 (17 hours) |
| 104075 | Brenac | Nicolas | M | FRA | FR | 4 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 117449 | Brennan | James | M | VA | US | 4 | Grindstone by UTMB 100km 2025 (18 hours) |
| 121964 | Brennan | Kaysen | F | Oregon | US | 2 | Cascade Crest 100M 2025 (34 hours) |
| 115463 | Brennan | Paul | M | Northern Ireland | GB | 4 | Mozart by UTMB 119km 2025 (23 hours) |
| 120447 | Breon | Lauren | F | Pennsylvania | US | 2 | Eastern States 100M 2025 (36 hours) |
| 118864 | Bretelle | Manu | M | CA | US | 4 | Quicksilver 100km 2025 (17 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) † |
| 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) |
| 123852 | Brichard | Marine | F | Colorado | US | 1 | Never Summer 100km 2025 (23 hours) |
| 116778 | Briet | Numa | M | New York | US | 4 | Twisted Branch 100km 2025 (20 hours) † |
| 124084 | Briggs | Bobby | M | UT | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 117440 | Bright | Randall | M | Arkansas | US | 4 | Mamba 100M 2024 (34 hours) † |
| 124145 | Briguglio | Kerrie-Ann | F | MA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 107365 | Briley | Phil | M | Kent | GB | 4 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 124654 | Brinker | Christie | F | IL | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 124666 | Britton | Scott | M | NJ | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 104768 | Brockdorf | Carmen | F | FL | US | 32 | Crazy Mountain 100M 2025 (36 hours) † |
| 120405 | brondeau | laurent | M | aude | FR | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 124354 | Brook | Amara | N | NV | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 107874 | Brooks | Jonathon | M | IL | US | 8 | Black Canyon 100km 2025 (17 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) |
| 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) |
| 108724 | Brown | Alaina | F | VA | US | 16 | Twisted Branch 100km 2025 (20 hours) † |
| 123951 | Brown | Andrew | M | New South Wales | AU | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 102194 | Brown | Brian | M | MN | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 109927 | Brown | Derek | M | MO | US | 4 | Hellgate 100km 2024 (17 hours) |
| 124434 | Brown | Garrett | M | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 124501 | Brown | Mike | M | Colorado | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 108700 | Brown | Mike | M | Arkansas | US | 4 | Beaverhead 100km 2025 (20 hours) |
| 124680 | Brown | Randall | M | WA | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 117642 | Brown | Robin | M | London | GB | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 104024 | Brown | Simon | M | GBR | GB | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 124356 | Brown | Viktoria | F | ON | CA | 1 | Fat Dog 120M 2025 (48 hours) † |
| 115727 | Browne | Melissa | F | WA | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 110026 | Browning | Kristina | F | VA | US | 8 | Umstead 100M 2025 (30 hours) |
| 117444 | Brownrigg | David | M | MI | US | 4 | Bigfoot 206M 2025 (100 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) |
| 117886 | Brunner | Erin | F | WA | US | 2 | Hood Hundred 100M 2025 (34 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) |
| 120613 | Brunson | Zachary | M | SOUTH CAROLINA | US | 2 | Umstead 100M 2025 (30 hours) |
| 109352 | Brunton | David | M | Lancs | GB | 1 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 123988 | Brunzell | Lukas | M | Värmland | SE | 1 | Zugspitz 106km 2025 (25 hours) |
| 119680 | Bruzek | Scott | M | MN | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 108052 | Bucci | Daniel | M | WA | US | 8 | Crazy Mountain 100M 2025 (36 hours) † |
| 110111 | Buchan | Scott | M | Il | US | 16 | Canyons by UTMB 104km 2025 (20 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) |
| 101119 | Buck | Heidi | F | MN | US | 4 | Superior 100M 2025 (38 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) † |
| 124231 | Buffa | Joe | M | MO | US | 1 | HOKA Bandera 100km 2025 (17 hours) |
| 124689 | Buffington | Jack | M | NH | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 100932 | Bujer | Ken | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 107198 | Buley | Mark | M | Gloucestershire | GB | 8 | Fat Dog 100km 2025 (24 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) |
| 108653 | Burant | Kevin | M | NC | US | 2 | Mamba 100M 2024 (34 hours) † |
| 122732 | Burdge | Hayden | M | ID | US | 2 | Sedona Canyons 125M 2025 (52 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) |
| 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) † |
| 122956 | Burgy | Maxime | M | Alsace | FR | 2 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 107886 | Burke | Tyler | M | California | US | 4 | Angeles Crest 100M 2025 (36 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) |
| 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) |
| 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) † |
| 116771 | Busada | Michael | M | PA | US | 2 | Eastern States 100M 2025 (36 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) |
| 113378 | Buss | Armin | M | Hessen | DE | 4 | Trail du Saint-Jacques by UTMB 130km 2025 (28 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) |
| 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) |
| 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) |
| 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) |
| 100170 | Byrne | Tommy | M | WI | US | 1 | Western States 100M 2025 (30 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) |
| 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) † |
| 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) † |
| 123998 | CAILLON | Pascal | M | HERAULT | FR | 1 | Grand Raid La Reunion 162km 2025 (50 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) |
| 104773 | Calcagnino | Denise | F | NY | US | 4 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 104661 | Calder | Phil | M | NZL | NZ | 32 | Tarawera by UTMB 100M 2025 (36 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) |
| 119965 | Calligaris | David | M | MA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 111596 | Calvert | Howard | M | Hampshire | GB | 8 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 102384 | Camenisch | Thomas | M | CHE | CH | 2 | Wildstrubel by UTMB 110km 2025 (27 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) † |
| 124748 | Camillaci | Lisa | F | NY | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 122160 | Campbell | Bryan | M | Tn | US | 2 | No Business 100M 2025 (34 hours) |
| 121739 | Campbell | John | M | BC | CA | 2 | Fat Dog 120M 2025 (48 hours) † |
| 102816 | Campbell | Kevin | M | TN | US | 64 | Rim to River 100M 2025 (32 hours) † |
| 115840 | Candelaria | Carlos | M | NC | US | 4 | Umstead 100M 2025 (30 hours) |
| 100972 | Cannaday | Kevin | M | CO | US | 2 | High Lonesome 100M 2025 (37 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) |
| 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) † |
| 121714 | Capron | Bruno | M | Rio de Janeiro | BR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 108318 | Carayon | Charles | M | Ain | FR | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 118749 | Cardeano | Joao | M | Alberta | CA | 2 | Tahoe 202M 2025 (100 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) † |
| 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) |
| 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) |
| 121286 | Caron | Joshua | M | MA | US | 2 | No Business 100M 2025 (34 hours) |
| 123969 | Carr | Douglas | M | Nevada | US | 1 | Waldo 100km 2025 (18 hours) † |
| 122000 | Carretero | Abel | M | Lleida | ES | 2 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 112251 | Carroll | Joe | M | OR | US | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 121524 | Carroll | Sam | M | Arizona | US | 2 | Moab 238M 2025 (108 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) |
| 112001 | Cartaya | Erin | F | CA | US | 4 | Beaverhead 100km 2025 (20 hours) |
| 101213 | Carter | Colton | M | CA | US | 32 | Beaverhead 100km 2025 (20 hours) |
| 100617 | Carter | Jonathan | M | CA | US | 32 | Siskiyou Out Back 100km 2025 (18 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) |
| 111340 | Carver | David | M | TN | US | 8 | Hellgate 100km 2024 (17 hours) |
| 105413 | Casasola | Alessandro | M | ITA | IT | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 111975 | Cashbaugh | Dylan | M | CA | US | 8 | San Diego 100M 2025 (32 hours) † |
| 101882 | Cassano | Andrew | M | NV | US | 32 | HURT 100M 2025 (36 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) |
| 116738 | Castellanos | Jaime | M | California | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 124543 | Castro | Natasha | F | NC | US | 1 | Hellbender 100M 2025 (40 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) † |
| 123712 | Cattina | Nicola | M | BS | IT | 1 | Restonica Trail by UTMB - Ultra-Trail® di Corsica 110km 2025 (36 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) |
| 101621 | Cavanaugh | Brian | M | MI | US | 4 | Worlds End 100km 2025 (19 hours) |
| 124374 | Cavey | Taylor | N | CO | US | 1 | Rocky Raccoon 100M 2025 (30 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) |
| 122882 | Cazzolli | Federico | M | Trento | US | 2 | Tuscany Crossing 103km 2025 (21 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) |
| 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) |
| 124776 | Cereghino | Claire | F | OR | US | 1 | Bear, The 100M 2025 (36 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) |
| 121046 | Ceus | Emmanuel | M | 49 | FR | 2 | Trail du Saint-Jacques by UTMB 130km 2025 (28 hours) |
| 118342 | Chacon Salas | Luis Carlos | M | San Jose | CR | 4 | Zugspitz 106km 2025 (25 hours) |
| 124165 | Chaffee | Andrew | M | MI | US | 1 | Indiana 100M 2025 (30 hours) |
| 115376 | chamberland | genevieve | F | Québec | CA | 2 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 108548 | Champagne | Anne | F | Quebec | CA | 1 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 124328 | Chan | Matt | M | MO | US | 1 | Long Haul 100M 2025 (30 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) |
| 105708 | Chang | Jordan | M | VA | US | 4 | Hellgate 100km 2024 (17 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) |
| 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) † |
| 124429 | Charlebois | Amanda | F | Ontario | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 120015 | Charpentier | Jean-Francois | M | Quebec | CA | 2 | Ultra-Trail Harricana 125km 2025 (26 hours) |
| 101360 | Chase | David | M | CA | US | 8 | Miwok 100km 2025 (15:30:59 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) † |
| 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) † |
| 106740 | Cheetham | Gregg | M | Gauteng | ZA | 4 | SkyRun 100km 2024 (28 hours) |
| 124530 | Chen | Ci Hang | M | NY | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124737 | Chen | Gang | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 124011 | Chen | Hongbing | M | California | US | 1 | Quicksilver 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) |
| 123583 | Cheripka | Daniel | M | Pennsylvania | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 124751 | Cherry | Brandi | F | TN | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 101660 | Cherviakov | Aleksandr | M | RUS | RU | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 101443 | Cheung | Kashing | M | HKG | HK | 2 | TOR330 - Tor de Géants 330km 2025 (132 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) |
| 118631 | Chick | Michael | M | OH | US | 4 | Canal Corridor 100M 2025 (30 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) |
| 116507 | Chmielewski | Max | M | WA | US | 4 | Hood Hundred 100M 2025 (34 hours) |
| 112434 | Choe | Terri | F | California | US | 8 | Quicksilver 100km 2025 (17 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) † |
| 124640 | Christiansen | Rachael | F | CO | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 110589 | Christopher | Saint-Alme | M | France | FR | 2 | 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) |
| 115861 | Chutter | Stuart | M | SK | CA | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 109851 | Cibulka | Jeramia | M | Colorado | US | 16 | Grindstone by UTMB 100km 2025 (18 hours) |
| 103660 | Ciclitira | Simone | M | ITA | IT | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 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) † |
| 108539 | Claassen | Daniel | M | Western Cape | ZA | 16 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 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) |
| 123687 | Clancy | Thomas | M | IL | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 107150 | Clark | Joshua | M | FL | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 121425 | Clark | Sarah | F | WA | US | 2 | Wasatch Front 100M 2025 (36 hours) † |
| 123874 | Clark | Taylor | M | Colorado | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 107932 | Clarke | Liz | F | CA | US | 8 | Angeles Crest 100M 2025 (36 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) |
| 105106 | Clay | Emily | F | MD | US | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 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) |
| 111536 | Clement | Antoine | M | France | FR | 8 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 114020 | Clements | Bill | M | CA | US | 8 | Tarawera by UTMB 102km 2025 (17 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) † |
| 112018 | Clemons | Makai | M | CA | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 123853 | Clermont | Cody | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 119947 | Cline | Casey | F | NC | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 119018 | Close | Gregory | M | NY | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 119787 | Coakes | Matthew | M | Surrey | GB | 2 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 119730 | Coats | Joey | M | LA | US | 2 | HOKA Bandera 100km 2025 (17 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) |
| 108684 | Cocco | Luis | M | Fl | US | 2 | Long Haul 100M 2025 (30 hours) † |
| 111389 | Cochrane | Simon | M | WaikatoTasman | NZ | 8 | Taupo 100km 2025 (17 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) |
| 113534 | Cohen | Sam | M | DC | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 124149 | Coker | Nathaniel | M | MI | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 115590 | Cole | Grant | M | PA | US | 4 | Twisted Branch 100km 2025 (20 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) † |
| 107391 | Collier | Chris | M | California | US | 4 | San Diego 100M 2025 (32 hours) † |
| 123505 | Collina Jr | Gary | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 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) |
| 123881 | Collins | Ken | M | North Carolina | US | 1 | Yeti Virginia 100M 2025 (30 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) |
| 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) † |
| 124785 | Colvin | Byron | M | MO | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 124667 | Combs | Leah | F | KY | US | 1 | Black Canyon 100km 2025 (17 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) † |
| 103951 | Conine | Scott | M | GA | US | 8 | Georgia Death Race 74M 2025 (24 hours) † |
| 116250 | Connell | Brendan | M | Arkansas | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 123862 | Connelly | John | M | Illinois | US | 1 | Black Canyon 100km 2025 (17 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) † |
| 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) |
| 124204 | Conti | Anthony | M | Florida | US | 1 | Long Haul 100M 2025 (30 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) |
| 102861 | Cook | Kelly | M | TX | US | 2 | Dinosaur Valley 100km 2024 (22 hours) |
| 122915 | Cook | Richard | M | WA | US | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 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) |
| 108048 | Cooper | Brandon | M | CO | US | 8 | Mountain Lakes 100M 2025 (30 hours) † |
| 112176 | Cooper | Craig | M | Utah | US | 8 | Zion 100km 2025 (19 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) |
| 124466 | Corbet | Blake | M | MN | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 101077 | Corbett | Sam | M | CA | US | 32 | California Fall Classic at Lake Sonoma 100km 2025 (19 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) † |
| 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) |
| 122668 | Cordey | Pierre-André | M | Fribourg | CH | 2 | Scenic Trail 130km 2025 (38 hours) |
| 105224 | Corey | Brian | M | UT | US | 4 | Run Rabbit Run 100M 2025 (36 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) † |
| 113475 | CORNUAU | Damien | M | Hauts de France | FR | 8 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 120654 | Cortez | Victor | M | CA | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 117505 | Cossey | Joseph | M | BC | CA | 4 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 123598 | Côté | Jean-Sébastien | M | QC | CA | 1 | Canyons by UTMB 104km 2025 (20 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) |
| 109524 | Cottrell | Bill | M | OR | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 104144 | Coughlan | Sean | M | AR | US | 64 | Bighorn 100M 2025 (35 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) † |
| 124614 | Courtney | Alastair | M | Kent | GB | 1 | South Downs Way 100M 2025 (30 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) |
| 119597 | Coutu | Michael | M | MD | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 123328 | Covi | Matteo | M | Italy | IT | 2 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 115871 | Cox | Leah | F | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 111968 | Cox | Tyler | M | WA | US | 4 | North Downs Way 100M 2025 (30 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) |
| 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) |
| 123802 | Craner | Chad | M | VA | US | 1 | Grindstone by UTMB 100M 2025 (36 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) † |
| 115435 | Crespo | Daniel | M | CO | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 124062 | Crevier | Dan | M | HI | US | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 100504 | Crews | Brandon | M | NC | US | 2 | Run Rabbit Run 100M 2025 (36 hours) |
| 113665 | Crombez | Andi | M | Oost-Vlaanderen | BE | 8 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 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) |
| 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) † |
| 115248 | Crowe | Darren | M | Limerick | IE | 4 | Kerry Way Ultra 101km 2025 (20 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) |
| 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) † |
| 119683 | Culbertson | Ashlyn | F | OH | US | 2 | Burning River 100M 2025 (30 hours) |
| 124719 | Cullen | Ryan | M | NC | US | 1 | Umstead 100M 2025 (30 hours) |
| 124584 | Cullum | Drew | M | MA | US | 1 | Vermont 100km 2025 (17 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) † |
| 111130 | Cummins | Matt | M | New Jersey | US | 8 | Hellgate 100km 2024 (17 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) |
| 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) |
| 111995 | Currie | Mandy | F | saskatchewan | CA | 4 | Gorge Waterfalls 100km 2025 (18 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) |
| 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) † |
| 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) |
| 115673 | Dahl Sommerseth | Stian | M | Oslo | NO | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 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) † |
| 100858 | Dains | Brad | M | IA | US | 128 | Hennepin 100M 2025 (30 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) |
| 124316 | Daly | Kaelin | M | CO | US | 1 | Zion 100M 2025 (36 hours) † |
| 102569 | Daly | Michael | M | CA | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 116562 | Damveld | Mark | M | Michigan | US | 4 | Tahoe 202M 2025 (100 hours) † |
| 124073 | Danieli | Mattia | M | italy | IT | 1 | Istria by UTMB 110km 2025 (24 hours) |
| 104402 | Danyliw | Roman | M | PA | US | 64 | C & O Canal 100M 2025 (30 hours) † |
| 108643 | Darigo | Austin | M | PA | US | 16 | Brazos Bend 100M 2024 (32 hours) |
| 115110 | Darnand | Emilie | F | Rhône | FR | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 114104 | Darnell | Matt | M | AZ | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 119772 | Darvey | Fabrice | M | France | FR | 2 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 107805 | Dattatreya | Robi | M | Noord Holland | NL | 16 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 123899 | David | Augustus | M | Texas | US | 1 | Bear, The 100M 2025 (36 hours) † |
| 111710 | david | ivanoff | M | 170 chemin des charmilles | FR | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 120307 | David | Thad | M | CO | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 115611 | Davidson | Taylor | M | Tennessee | US | 4 | No Business 100M 2025 (34 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) |
| 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) |
| 112009 | Davis | Brad | M | CO | US | 4 | Never Summer 100km 2025 (23 hours) |
| 123529 | Davis | Christina | F | Ca | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 124616 | Davis | Daniel | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 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) † |
| 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) |
| 117926 | Davis | Tim | M | OH | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 115930 | Dawson | Jonathan | M | California | US | 4 | Bear, The 100M 2025 (36 hours) † |
| 121132 | Dawson | Tessa | F | CO | US | 2 | High Lonesome 100M 2025 (37 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) |
| 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) |
| 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) † |
| 112990 | de Jesus | Keila | F | NJ | US | 4 | Rim to River 100M 2025 (32 hours) |
| 106563 | De La Rosa | Ezequiel | M | CA | US | 32 | Cuyamaca 100km 2025 (17 hours) † |
| 116436 | DE NARP | BENJAMIN | N | France | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 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) |
| 116125 | De Witt | Garrett | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 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) |
| 118176 | Debski | Katie | F | CA | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 124187 | Decker | Lisa | F | TX | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 118174 | DeDoncker | John | M | IA | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 124162 | Deese | Josh | M | SC | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 124752 | Defend | Adrien | M | Herault | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 104100 | DeGroff | Sierra | F | NV | US | 1 | Western States 100M 2025 (30 hours) † |
| 118268 | DeHaan | Megan | F | Montana | US | 2 | HURT 100M 2025 (36 hours) † |
| 111267 | Deja | Dariusz | M | Polska | PL | 1 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 124669 | Delgado | Samuel | M | Colorado | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 104274 | Delgado Ortiz | Silvia | F | GBR | GB | 2 | Lakeland 100M 2025 (40 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) |
| 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) |
| 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) |
| 124219 | Dempsey | Tyler | M | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 124057 | DeMyer | Tori | F | OR | US | 1 | Sedona Canyons 125M 2025 (52 hours) |
| 123446 | Denby | Samuel | M | CO | US | 1 | Black Canyon 100km 2025 (17 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) |
| 111240 | Dermoudy | Sam | M | Queensland | AU | 2 | Blackall 100km 2025 (18 hours) |
| 117179 | Derov | Johnny | M | Ohio | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 119374 | Desai | Dnyanraj | M | Maharashtra | IN | 2 | Brazil 135M 2025 (60 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) |
| 109895 | Desille | Clément | M | Haute Savoie | FR | 16 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 112887 | DESPREAUX | JEREMY | M | HAUT DE FRANCE | FR | 8 | Endurance Trail des Templiers 105km 2025 (19 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) |
| 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) |
| 115342 | DEVILLE CAVELLIN | Matthieu | M | Gironde | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 110473 | DeVona | Lisa | F | Florida | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 121334 | DeWitt | Nicole | F | Oregon | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) |
| 117361 | deyesso | Karen | F | ME | US | 2 | Vermont 100M 2025 (30 hours) |
| 120445 | Di Iorio | Christina | F | BC | CA | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124070 | Diaz | Daniel | M | North Carolina | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 124178 | Dibb | Matthew | M | MA | US | 1 | HOKA Bandera 100km 2025 (17 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) |
| 123958 | Dicks | David | M | Cumbria | GB | 1 | Ultra-Trail Australia by UTMB 100km 2025 (19 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) |
| 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) |
| 114804 | Dillon | Michael | M | PERTHSHIRE | GB | 4 | Valleys Ultra (7) 110km 2025 (25 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) † |
| 113859 | DiMarco | Nicholas | M | Texas | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 113693 | Dinnett | Craig | M | Jersey | JE | 8 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 124749 | DiPaul | Adam | M | PA | US | 1 | Rabid Raccoon 100km 2025 (22 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) |
| 113845 | Doane | Deanna | N | FL | US | 8 | Laurel Highlands 70.5M 2025 (20 hours) |
| 119820 | Dobrev | Georgi | M | Sofia | BG | 2 | Istria by UTMB 110km 2025 (24 hours) |
| 101270 | Dobson | Jason | M | OR | US | 16 | Hood Hundred 100M 2025 (34 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) † |
| 109066 | Dolezal | Ben | M | Texas | US | 4 | Zion 100km 2025 (19 hours) |
| 124661 | Dominguez Gonzalez | Evaristo Javier | M | Asturias | ES | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124573 | Donald | Trenton | M | Ohio | US | 1 | Burning River 100M 2025 (30 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) |
| 120041 | Doran | Danny | M | NY | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 110427 | dorantes | rene | M | CA | US | 16 | California Fall Classic at Lake Sonoma 100km 2025 (19 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) † |
| 114826 | Dorrance | Evan | M | Washington | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 115440 | Dos Santos | Cyril | M | France | FR | 2 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 124734 | Doucette | Ben | M | Texas | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 103997 | Dougherty | Heather | F | DC | US | 64 | Fat Dog 120M 2025 (48 hours) † |
| 120802 | Douglas | Ian | M | CA | US | 2 | Cocodona 250M 2025 (125 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) |
| 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) |
| 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) |
| 107278 | Draper | Cody | M | Utah | US | 8 | Hardrock 100M 2025 (48 hours) † |
| 108803 | Drazer | Michael | M | IN | US | 16 | Superior 100M 2025 (38 hours) † |
| 111502 | Drilling | Carsten | M | ZH | CH | 8 | Swiss Alps 100M 2025 (50 hours) |
| 107190 | Drowne | Jeremy | M | NY | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 124639 | Druel | Thibault | M | Haute-Savoie | FR | 1 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 123927 | Du | Shunfan | M | Jiangsu | CN | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 116333 | Dube | William | M | VA | US | 2 | Yeti Virginia 100M 2025 (30 hours) |
| 108001 | DuBois | Brett | M | AZ | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 103600 | Ducommun | Julien | M | CHE | CH | 1 | Western States 100M 2025 (30 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) † |
| 124361 | Duffield | Lindsey | F | TX | US | 1 | Dinosaur Valley 100M 2024 (35 hours) † |
| 124581 | Duffley | James | M | NB | CA | 1 | Istria by UTMB 110km 2025 (24 hours) |
| 114251 | Dufoin | Florian | M | France | FR | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 102634 | Dufour | Christian | M | QC | CA | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 113938 | Dugan | Sara | F | California | US | 8 | Miwok 100km 2025 (15:30:59 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) † |
| 108029 | Duncan | Mark | M | North Yorkshire | GB | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 118030 | Duncan | Samuel | M | Tennessee | US | 4 | No Business 100M 2025 (34 hours) |
| 107581 | Duncan | Stewart | M | Ga | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 112049 | Dunkley | Jennie | F | Bedfordshire | GB | 4 | Thames Path 100M 2025 (30 hours) |
| 100018 | Dunstall | Lee | M | GBR | GB | 1 | Western States 100M 2025 (30 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) † |
| 124319 | Duran | Bryan | N | CO | US | 1 | Oregon Cascades 100M 2025 (32:01:18 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) |
| 108073 | Durkan | Anneke | F | Texas | US | 16 | Cascade Crest 100M 2025 (34 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) |
| 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) † |
| 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) † |
| 100219 | Dyas | Adam | M | OH | US | 16 | Vermont 100km 2025 (17 hours) |
| 116613 | Dybas | Jared | M | CT | US | 4 | Massanutten 100M 2025 (36 hours) † |
| 124426 | Dye | Lindsey | F | VA | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 124067 | Dziedzic | Szymon | M | Poland | PL | 1 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 116338 | Eagle | Zach | M | Indiana | US | 4 | Run Rabbit Run 100M 2025 (36 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) † |
| 106784 | Easby | Conrad | M | British Columbia | CA | 8 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 107406 | Eastman | Chad | M | AB | CA | 8 | Lost Soul Ultra 100km 2025 (21 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) † |
| 103871 | Eckardt | Scott | M | CA | US | 32 | Bear, The 100M 2025 (36 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) |
| 123651 | Edge | Elliott | M | CO | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 115185 | Edgerton | Steve | M | AB | CA | 2 | Lost Soul Ultra 100km 2025 (21 hours) |
| 123925 | Edwards | Challen | F | CO | US | 1 | Miwok 100km 2025 (15:30:59 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) |
| 119368 | Eerdmans | Kendra | F | ND | US | 2 | Black Canyon 100km 2025 (17 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) |
| 106282 | Elam | Jimmy | M | UT | US | 32 | Cascade Crest 100M 2025 (34 hours) |
| 124024 | Elder | David | M | Perthshire | GB | 1 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 124506 | Eley | Emma | F | Oxfordshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 124267 | Elliott | Cean | M | OR | US | 1 | Waldo 100km 2025 (18 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) † |
| 121105 | Ellis | Carley | F | KS | US | 2 | Bear, The 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) † |
| 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) † |
| 100789 | Elson | James | M | GBR | GB | 32 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 104547 | Emis | Jon | M | CA | US | 128 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124672 | EMMETT | BENJAMIN | M | New Jersey | US | 1 | Worlds End 100km 2025 (19 hours) |
| 100811 | Engel | Llewelyn | F | DC | US | 32 | Yeti Virginia 100M 2025 (30 hours) † |
| 107658 | Englehart | Thomas | M | Ohio | US | 16 | Mohican 100M 2025 (32 hours) |
| 123972 | Ennis | David | M | KY | US | 1 | No Business 100M 2025 (34 hours) |
| 118409 | Entrekin | Rachel | F | California | US | 4 | High Lonesome 100M 2025 (37 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) |
| 115799 | Erickson | Anne | F | UT | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 123966 | Erne | David | M | Zurich | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 124780 | Ervin | Brian | M | CO | US | 1 | Never Summer 100km 2025 (23 hours) |
| 124532 | Espenel | Rob | M | CO | US | 1 | Cocodona 250M 2025 (125 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) |
| 110283 | Estrada | Emily | F | OR | US | 8 | Waldo 100km 2025 (18 hours) † |
| 122988 | ETIENNE | Ghylian | M | Plaines Wilhems | MU | 2 | Grand Raid La Reunion 162km 2025 (50 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) |
| 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) |
| 107568 | Evans | Matt | M | Kent | GB | 2 | Arc of Attrition by UTMB 100M 2025 (36 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) |
| 111776 | Everhart | Brock | M | OH | US | 8 | Cocodona 250M 2025 (125 hours) |
| 123698 | Ewers | Dustin | M | IN | US | 1 | Indiana 100M 2025 (30 hours) |
| 100542 | Ewing | Brett | M | CA | US | 128 | Quicksilver 100km 2025 (17 hours) † |
| 122286 | Fader | Sean | M | CA | US | 2 | Cuyamaca 100km 2025 (17 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) |
| 112978 | Falk | Jonathan | M | MA | US | 4 | Vermont 100M 2025 (30 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) † |
| 117601 | Falzon | Jason | M | Texas | US | 4 | Rocky Raccoon 100M 2025 (30 hours) |
| 124402 | Fan | Shumin | F | Washington | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 119320 | Fano | Cyrille | M | Drôme | FR | 1 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 119566 | Farno | Christopher | M | NC | US | 2 | Grindstone by UTMB 100km 2025 (18 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) † |
| 120420 | Farrell | Suzanne | F | CA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 117911 | Fasl | Joseph | M | New York | US | 4 | Twisted Branch 100km 2025 (20 hours) † |
| 111623 | Fatigante | Michael | M | PA | US | 8 | Mohican 100M 2025 (32 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) |
| 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) |
| 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) |
| 124343 | Fenimore | Landon | M | VT | US | 1 | Twisted Branch 100km 2025 (20 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) |
| 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) † |
| 118438 | Ferguson | Stan | M | AR | US | 4 | Grindstone by UTMB 100km 2025 (18 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) |
| 123926 | Ferrero | Juan Ricardo | M | Córdoba | AR | 1 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 105155 | Ferretto | Alberto | M | ITA | IT | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 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) |
| 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) |
| 124505 | Field | Adam | M | Arizona | US | 1 | Black Canyon 100km 2025 (17 hours) |
| 121059 | Fierros Miranda | Antonio Rafael | M | SIN | MX | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 113903 | Figone Crouch | Lisa | F | CA | US | 4 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 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) |
| 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) |
| 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) |
| 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) † |
| 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) |
| 100321 | Fitz | John | M | MD | US | 64 | Indiana 100M 2025 (30 hours) |
| 112897 | Fladhammer | James | M | Wisconsin | US | 8 | Tahoe 202M 2025 (100 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) |
| 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) † |
| 115970 | Fleeger | Kevin | M | FL | US | 4 | Cocodona 250M 2025 (125 hours) |
| 109063 | Fletcher | Matt | M | UT | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 124637 | Fleugel | Chris | M | BC | CA | 1 | Fat Dog 120M 2025 (48 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) |
| 124380 | Flores | Elizabeth | F | Pennsylvania | US | 1 | Javelina Jundred 100M 2025 (30 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) |
| 121338 | Floyd | Ian | M | CO | US | 2 | Javelina Jundred 100M 2025 (30 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) |
| 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) |
| 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) † |
| 124527 | Foltz | Hunter | M | Ohio | US | 1 | Leadville Trail 100M 2025 (30 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) † |
| 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) † |
| 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) |
| 109252 | Ford | Isaiah | M | AZ | US | 4 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 123821 | Forester | Nathan | M | Saskatchewan | CA | 1 | Lost Soul Ultra 100km 2025 (21 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) |
| 120141 | fortier | joanna | F | Vermont | US | 2 | Vermont 100km 2025 (17 hours) |
| 124427 | Fortunato | Paul | M | IL | US | 1 | No Business 100M 2025 (34 hours) |
| 124439 | Foster | Clayton | M | Wisconsin | US | 1 | Tahoe 202M 2025 (100 hours) † |
| 124235 | Foster | Jessica | F | TN | US | 1 | Hellbender 100M 2025 (40 hours) † |
| 123878 | Foster | Stuart | M | British Columbia | CA | 1 | Fat Dog 120M 2025 (48 hours) † |
| 123964 | Fougeres | Jean-David | M | Haute normandie | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 123795 | Fowler | Paddy | M | Edinburgh | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 123700 | Fowler | Ryan | M | Ohio | US | 1 | Canal Corridor 100M 2025 (30 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) |
| 124227 | fox | Jeff | M | Pennsylvania | US | 1 | Twisted Branch 100km 2025 (20 hours) |
| 123644 | Fox | Nicholas | M | MD | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 103513 | Fox | Wallly | M | OR | US | 32 | Waldo 100km 2025 (18 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) |
| 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) |
| 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) |
| 124688 | Fredell | Dennis | M | WA | US | 1 | Cascade Crest 100M 2025 (34 hours) |
| 110077 | Frederiksen | Claus Ellgaard | M | Nordjylland | DK | 16 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 120688 | Freeman | Renee | F | Montana | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 102520 | Freitag | Michael | M | DEU | DE | 64 | Canyons by UTMB 100M 2025 (35 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) |
| 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) † |
| 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) |
| 106808 | Fuchs | Trevor | M | 2 | IMTUF 100M 2025 (36 hours) † | ||
| 109116 | Fuentes Rivera | Hector | M | San Salvador | SV | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 101098 | Fujioka | Masazumi | M | WA | US | 64 | Hardrock 100M 2025 (48 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) |
| 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) |
| 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) |
| 104954 | Gabbe | Charles | M | CA | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 124679 | Gabrielli | William | M | Armagh | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 119126 | Gage | Sarah | F | New Mexico | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 109561 | Gagne | Eric | M | Quebec | CA | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 113948 | Gagnon | Nanette Rosie | F | VA | US | 4 | Cruel Jewel 106M 2025 (48 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) |
| 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) † |
| 103956 | Galloway | David | M | NC | US | 1 | Western States 100M 2025 (30 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) † |
| 123183 | Gamberale | Carlo | M | Lazio | IT | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 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) |
| 124136 | Gannaway | James | M | WA | AU | 1 | Buffalo Stampede 100km 2025 (23 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) † |
| 115760 | Garber | Ryan | M | Virginia | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 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) |
| 100110 | Garcia | Rogelio | M | MEX | MX | 32 | Javelina Jundred 100M 2025 (30 hours) † |
| 107346 | Garcia-Carroll | Ryan | M | GA | US | 16 | Cruel Jewel 106M 2025 (48 hours) † |
| 120922 | Gardiner | Brandon | M | British Columbia | CA | 2 | Black Canyon 100km 2025 (17 hours) † |
| 115328 | Gardner | Canaan | M | Ohio | US | 4 | Indiana 100M 2025 (30 hours) |
| 119429 | Gardner | Justin | M | Leicestershire | GB | 2 | Mozart by UTMB 119km 2025 (23 hours) |
| 119473 | Garlitz | Kirby | M | Oregon | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 112048 | Garneau | Marie-Eve | F | Quebec | CA | 2 | Black Canyon 100km 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) |
| 115722 | Garnier | David | M | Ohio | US | 2 | Canal Corridor 100M 2025 (30 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) |
| 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) |
| 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) † |
| 101099 | Gates | Jorma | M | CA | US | 16 | Tarawera by UTMB 102km 2025 (17 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) † |
| 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) |
| 120232 | Gaydon | Anthony | M | Hérault | FR | 2 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 121294 | Gaynor | Jen | F | NJ | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 122466 | Ge | Zhong | M | Beijing | CN | 1 | Western States 100M 2025 (30 hours) † |
| 101899 | Geib | Michelle | F | CO | US | 4 | High Lonesome 100M 2025 (37 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) |
| 119953 | Gélinas | Étienne | M | QC | CA | 2 | Quebec Mega Trail 135km 2025 (32 hours) |
| 109124 | Geoffroy | DEGRANGE | M | ESSONE | FR | 4 | Swiss Canyon Trail 111km 2025 (24 hours) |
| 103580 | Geraghty | Sophie | F | AUS | AU | 16 | Surf Coast Century 100km 2025 (17 hours) |
| 104823 | Gerhart | Colton | M | ID | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 124517 | Gerlach | Steven | M | CA | US | 1 | Quicksilver 100km 2025 (17 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) † |
| 124271 | Gessel | Thad | M | Pa | US | 1 | Mohican 100M 2025 (32 hours) |
| 122317 | Geswell | Ryan | M | NC | US | 2 | Hellbender 100M 2025 (40 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) |
| 124454 | Gibb | Matt | M | UK | GB | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 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) † |
| 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) |
| 113185 | Gibson | Billy | M | Angus | US | 4 | Tenerife Bluetrail by UTMB 110 km 2025 (26 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) † |
| 124348 | Giese | Sheri | F | IA | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 103015 | Gifford | Katherine | F | California | US | 16 | Bear, The 100M 2025 (36 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) |
| 120874 | Gilbert | Brian | M | TX | US | 2 | Crazy Mountain 100M 2025 (36 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) |
| 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) |
| 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) † |
| 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) † |
| 101357 | Giordano | Greg | M | CO | US | 64 | Desert RATS by UTMB 100km 2025 (20 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) |
| 124122 | Giraudy | Simon | M | Île de France | FR | 1 | Swiss Alps 100M 2025 (50 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) † |
| 121991 | Glaeser | Cory | M | OR | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 112346 | Glaze | Andrew | M | CA | US | 8 | Moab 238M 2025 (108 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) † |
| 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) † |
| 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) † |
| 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) † |
| 100644 | Gold | Neale | F | CA | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 102049 | Goldstein | Matthew | M | NY | US | 8 | Vermont 100M 2025 (30 hours) |
| 124188 | Gomez | Teresita | F | California | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 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) † |
| 124500 | Gonzalez | Christian | M | NC | US | 1 | Umstead 100M 2025 (30 hours) |
| 115934 | Gonzalez | Michael | M | Utah | US | 2 | Wasatch Front 100M 2025 (36 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) |
| 124717 | Goodbody | Chrissy | F | PA | US | 1 | Yeti Virginia 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) |
| 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) |
| 116341 | Göpel | Tobias | M | Thüringen | DE | 4 | Eiger Ultra Trail 101km 2025 (14:30 hours) |
| 124075 | Gordon | Ethan | N | TX | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 106034 | Gordon | Quinten | M | NC | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 123844 | GORI | DAVID | M | Geneva | CH | 1 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 110758 | Goscinski | Dwayne | M | Co | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 111163 | GOSLING | ALISON | F | SA | AU | 4 | Surf Coast Century 100km 2025 (17 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) † |
| 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) |
| 104490 | Gow | Joe | M | IL | US | 2 | Hennepin 100M 2025 (30 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) |
| 112905 | Graham | James | M | QLD | AU | 4 | Blackall 100km 2025 (18 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) † |
| 124089 | Grant | Cory | M | MA | US | 1 | Vermont 100M 2025 (30 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) |
| 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) † |
| 122166 | Gray | Ady | M | Lancashire | GB | 2 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 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) † |
| 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) |
| 123828 | Greene | Joe | M | NC | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 124108 | Greene | Rebecca | F | NC | US | 1 | Umstead 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) |
| 123906 | Gregory | Garet | M | AR | US | 1 | Mamba 100M 2024 (34 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) † |
| 116447 | Grey | Emma | F | NSW | AU | 2 | North Downs Way 100M 2025 (30 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) |
| 124580 | GRIFFITHS | JASON | M | AB | CA | 1 | Canadian Death Race 118km 2025 (24 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) † |
| 124150 | Grimm | David | M | ME | US | 1 | IMTUF 100M 2025 (36 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) |
| 124080 | Grizot | Damien | M | Grand est | FR | 1 | SwissPeaks 360km 2025 (156 hours) |
| 117820 | Gross | Christian | M | Bayern | DE | 4 | Zugspitz 100M 2025 (48 hours) |
| 101852 | Grotenhuis | John | M | CO | US | 16 | Tahoe 202M 2025 (100 hours) † |
| 115685 | Grundmann | Nathan | M | North Carolina | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 107207 | Gschwandtner | Wolfgang | M | Austria | AT | 8 | Mozart by UTMB 119km 2025 (23 hours) |
| 107361 | Guerard | Simon | M | Quebec | CA | 16 | Cocodona 250M 2025 (125 hours) |
| 121658 | Guermeur | Mik | M | Finistere | FR | 2 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 115894 | Guerrero Barrera | Claudia | F | Virginia | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124420 | Guest | Ryan | M | CA | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 121267 | Gugelmann | Christian | M | Aargau | CH | 2 | Eiger Ultra Trail 250km 2025 (90 hours) |
| 112692 | GUILFORD | MICHAEL | M | CO | US | 2 | Valleys Ultra (7) 110km 2025 (25 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) |
| 124008 | Guillon | Sylvain | M | France | FR | 1 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 101071 | Guillot | Thierry Maxime | M | FL | FR | 128 | Angeles Crest 100M 2025 (36 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) |
| 124330 | Gutekunst | Meghan | F | CA | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 105628 | Guthrie | Forbes | M | CA | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 124536 | Gutiérrez | Manuel | M | Santiago | CL | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 111540 | Guyonnet | Benjamin | M | Rhône | FR | 4 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 124026 | Gysel | Simon | M | ZH | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 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) |
| 113956 | Haby | Shaun | M | Washington | US | 8 | Cascade Crest 100M 2025 (34 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) |
| 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) |
| 103253 | Hagen | Bjoern | M | AZ | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 124199 | Hager | David | M | TN | US | 1 | Javelina Jundred 100M 2025 (30 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) |
| 121006 | Haimes | David | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 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) |
| 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) † |
| 117253 | Halkosaari | Lauri | M | Uusimaa | FI | 2 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 102365 | Hall | Douglas | M | MA | US | 8 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 115277 | Hall | Graeme | M | Scottish Borders | GB | 2 | West Highland Way 95M 2025 (30 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) |
| 118408 | Hall | Nick | M | Nsw | AU | 4 | Guzzler Ultra 100km 2025 (24 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) |
| 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) |
| 111811 | Halls | Jen | F | TN | US | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 100827 | Hamberlin | Deborah | F | AZ | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 124063 | Hameed | Shirhaan | M | Maldives | US | 1 | Ultra-Trail Snowdonia by UTMB 165km 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) |
| 112578 | Hammond | Mark | M | Utah | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 102741 | Hamoudi | Lindsay | M | CA | 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) † |
| 120812 | Hancey | Brian | M | UT | US | 2 | Bear, The 100M 2025 (36 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) |
| 116282 | Hangler | Markus | M | Upper Austria | AT | 4 | Julian Alps Trail Run by UTMB 120km 2025 (26 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) |
| 112598 | Hansen | Laura | F | CA | US | 8 | Black Canyon 100km 2025 (17 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) |
| 105729 | Hanson | Jon | M | CO | US | 16 | Run Rabbit Run 100M 2025 (36 hours) |
| 111641 | Hara | Tomomi | F | tokyo | JP | 4 | OSJ Ontake 100M 2025 (24 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) |
| 124232 | Hardwick | Joel | M | West yorkshire | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 100011 | Hardy | Jessica | F | CA | US | 32 | Hellbender 100M 2025 (40 hours) † |
| 111537 | Hargesheimer | Julia | F | TX | US | 8 | Kettle Moraine 100M 2025 (30 hours) † |
| 114148 | Harink | Ash | M | VIC | AU | 8 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 101540 | Harreld | Nick | M | MT | US | 16 | Grindstone by UTMB 100M 2025 (36 hours) |
| 124384 | Harris | Cassie | F | AR | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 122295 | Harris | Megan | F | Vic | AU | 2 | Surf Coast Century 100km 2025 (17 hours) |
| 106587 | Harrison | Ben | M | QLD | AU | 2 | Buffalo Stampede 100km 2025 (23 hours) |
| 111896 | Harrison | Dean | M | west midlnds | GB | 8 | Thames Path 100M 2025 (30 hours) |
| 123039 | Harrison | Peter | M | Zuid Holland | NL | 2 | South Downs Way 100M 2025 (30 hours) |
| 123822 | Hart | Emily | F | MD | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 114378 | Harter | Brian | M | CA | US | 8 | Canyons by UTMB 104km 2025 (20 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) † |
| 109829 | Hartupee | Michael | M | TN | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 108888 | Harvey | David | M | Alabama | US | 8 | Cruel Jewel 106M 2025 (48 hours) † |
| 107232 | Harvey | Nikki | F | AL | US | 8 | Cruel Jewel 106M 2025 (48 hours) † |
| 120288 | Harvey | Wynne | M | Tx | US | 2 | Rocky Raccoon 100M 2025 (30 hours) |
| 106845 | Hastings | Orestes Pat | M | CO | US | 4 | Never Summer 100km 2025 (23 hours) |
| 121422 | Hattler | Frank | M | California | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 101122 | Hausken | Janet | F | CO | US | 128 | Bighorn 100M 2025 (35 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) † |
| 100519 | Hawkes | Kenneth | M | OR | US | 16 | Hood Hundred 100M 2025 (34 hours) |
| 124088 | Hawley | Angie | F | ON | CA | 1 | Indiana 100M 2025 (30 hours) |
| 119685 | Haws | Joshua | M | Ut | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 100527 | Hay | Ross | M | CHE | CH | 4 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 123376 | Haycock | Brady | F | DC | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 108580 | Hayden | Chris | M | Wyoming | US | 4 | Bighorn 100M 2025 (35 hours) |
| 114884 | HAYGOOD | COREY | M | AZ | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 120351 | Haynes | Mitch | M | Illinois | US | 2 | Bighorn 100M 2025 (35 hours) |
| 120328 | Hayter | Noah | M | US-MI | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 118683 | head | brian | M | NB | CA | 2 | Black Canyon 100km 2025 (17 hours) † |
| 103377 | Headrick | Christopher | M | OH | US | 32 | Vermont 100M 2025 (30 hours) |
| 124718 | Hebert | Dante | M | OR | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) |
| 123977 | Hedges | Ian | M | Hampshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 113736 | Hedlund | Lars | M | Västerbotten | SE | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 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) |
| 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) |
| 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) |
| 124236 | Heiss | Ethan | M | DC | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 124037 | Hélène | Seyrès | F | Hérault | FR | 1 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 113681 | Helland | Elizabeth | F | CO | US | 8 | Zion 100km 2025 (19 hours) |
| 118499 | Hemming | Mat | M | Dorset | GB | 2 | Autumn 100M 2025 (28 hours) |
| 123696 | Henderson | Jonathan | M | Mn | US | 1 | Superior 100M 2025 (38 hours) † |
| 112161 | Henkel | Oliver | M | BRITISH COLUMBIA | CA | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 124396 | Hennecke | Christian | M | Baden Württemberg | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 124791 | Hennessy | Steve | M | MN | US | 1 | Superior 100M 2025 (38 hours) † |
| 116415 | Henning | Brennan | M | Virginia | US | 2 | Laurel Highlands 70.5M 2025 (20 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) |
| 117621 | Henry | William | M | PA | US | 4 | Tahoe 202M 2025 (100 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) † |
| 106248 | Henson | Michael | M | WA | US | 32 | Hardrock 100M 2025 (48 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) |
| 121899 | Herbert | Steve | M | OCCITANIE | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 103791 | Herdt | Ilja | M | CA | US | 32 | California Fall Classic at Lake Sonoma 100km 2025 (19 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) |
| 101067 | Hernandez | Andres | M | PA | US | 2 | Massanutten 100M 2025 (36 hours) † |
| 124786 | Hernandez | Sarah | F | CA | US | 1 | Javelina Jundred 100M 2025 (30 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) † |
| 102322 | Herrington | Bobby | M | NC | US | 32 | Grindstone by UTMB 100km 2025 (18 hours) |
| 120039 | HERRMANN | OLIVER DAVID | M | Bern | CH | 2 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 124394 | Herzog | Ryan | M | CO | US | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 121416 | Hessling | Brendan | M | MI | US | 2 | Cruel Jewel 106M 2025 (48 hours) † |
| 109236 | Hetrick | Chad | M | OK | US | 16 | Leadville Trail 100M 2025 (30 hours) |
| 104754 | Heward | Sam | M | GBR | GB | 16 | Swiss Alps 100km 2025 (22 hours) |
| 123825 | Hewson | Robin | M | Rhode Island | US | 1 | Black Canyon 100km 2025 (17 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) † |
| 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) |
| 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) |
| 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) † |
| 101520 | Hihnala | Heikki | M | FIN | FI | 16 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 122793 | Hildahl | Conner | M | Ontario | CA | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 116988 | Hildrew | Christopher | M | Tasmania | AU | 4 | Tarawera by UTMB 102km 2025 (17 hours) |
| 100880 | Hill | Brian | M | CO | US | 2 | Leadville Trail 100M 2025 (30 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) † |
| 124465 | Hill | Jake | M | Greater London | GB | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 100236 | Hill | Nicholas | M | NJ | US | 1 | Western States 100M 2025 (30 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) |
| 113198 | Himbert | Caroline | F | Utah | US | 8 | Beaverhead 100km 2025 (20 hours) |
| 124428 | Hincapie Castillo | Juan | M | North Carolina | US | 1 | Javelina Jundred 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) † |
| 102004 | Hinesly | Jace | M | OR | US | 4 | Pine to Palm 100M 2025 (34 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) |
| 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) |
| 113212 | Hirvela | Jeff | M | TX | US | 8 | Bigfoot 206M 2025 (100 hours) † |
| 104216 | Hites | Jared | M | OH | US | 32 | Siskiyou Out Back 100km 2025 (18 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) † |
| 119619 | Hoang | Song | M | Ho Chi Minh | VN | 1 | 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) | ||
| 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) † |
| 113139 | Hodgens | Nathan | M | California | US | 8 | Quebec Mega Trail 135km 2025 (32 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) † |
| 120234 | Hoffman | Adam | M | MA | US | 2 | Mohican 100M 2025 (32 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) † |
| 124608 | hoffmann | robert | M | WI | US | 1 | Superior 100M 2025 (38 hours) † |
| 109273 | Hofmann | Michael | M | WV | US | 8 | IMTUF 100M 2025 (36 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) |
| 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) † |
| 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) |
| 105116 | Holk | James | M | OR | US | 64 | Cascade Crest 100M 2025 (34 hours) |
| 124586 | Holladay | Lincoln | M | Idaho | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 124554 | Holland | Wallace | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 121689 | Hollenbaugh | Rick | M | MT | US | 2 | Vermont 100M 2025 (30 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) † |
| 124766 | Holmes | Steven | M | CA | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 124645 | Homann Hrycyna | Gustavo | M | São Paulo | BR | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 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) † |
| 124686 | Hong | Julie | F | NY | US | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 123753 | Hoogland | Steve | M | Texas | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 111133 | Hope | Owen | M | BC | CA | 8 | Cascade Crest 100M 2025 (34 hours) |
| 107285 | Hopper | Dan | M | OH | US | 8 | Leadville Trail 100M 2025 (30 hours) |
| 102478 | Horan | Pete | M | FL | US | 128 | Black Canyon 100km 2025 (17 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) † |
| 106203 | Horn | Crista | F | MD | US | 2 | Arkansas Traveler 100M 2025 (30 hours) |
| 110143 | Horner | John | M | NC | US | 4 | Georgia Death Race 74M 2025 (24 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) |
| 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) |
| 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) † |
| 124551 | Hourigan | Deanna | F | KY | US | 1 | Tahoe 202M 2025 (100 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) |
| 100668 | Howell | Shannon | F | SC | US | 16 | Hellbender 100M 2025 (40 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) |
| 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) † |
| 102052 | Hsueh | Jack | M | CA | US | 16 | Wasatch Front 100M 2025 (36 hours) † |
| 124138 | Hu | Lucy | F | PA | US | 1 | Cruel Jewel 106M 2025 (48 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) |
| 105395 | Huang | Hongguo | M | CHN | CN | 8 | Mt Fuji 100M 2025 (46 hours) |
| 119501 | Huang | Teng | M | Chongqing | CN | 2 | Ninghai Ultra Trail 109km 2025 (24 hours) |
| 112564 | Hubsher | Chad | M | Florida | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 117336 | Hudson | Eric | M | Tennessee | US | 4 | Hellbender 100M 2025 (40 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) |
| 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) † |
| 108336 | Hughes | Dan | M | MI | US | 16 | Hellbender 100M 2025 (40 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) † |
| 121310 | Humphreys | Nathan | M | mid lothian | US | 2 | Wildstrubel by UTMB 110km 2025 (27 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) |
| 124472 | Hunter | Ryan | M | NH | US | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 124375 | Hunyor | Jamie | M | California | US | 1 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 105892 | Hurley | Raymond | M | NV | US | 8 | California Fall Classic at Lake Sonoma 100km 2025 (19 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) |
| 100239 | Husseini | Naji | M | NC | US | 32 | Crazy Mountain 100M 2025 (36 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) |
| 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) |
| 115479 | Huzij | Frank | M | Niederösterreich | AT | 4 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 105630 | Hyslop | Stuart | M | GBR | GB | 32 | SwissPeaks 100km 2025 (28 hours) |
| 101025 | Ihara | Tomokazu | M | JPN | JP | 4 | Massanutten 100M 2025 (36 hours) † |
| 124559 | Ikäheimo | Jorma | M | Etela-Suomen Laani | FI | 1 | Nuts Ylläs Pallas 100km 2025 (22 hours) |
| 112122 | Ilagan | Tyller | M | Alberta | CA | 2 | Lost Soul Ultra 100M 2025 (33 hours) † |
| 123272 | Indrisevicius | Marius | M | QLD | AU | 2 | Guzzler Ultra 100km 2025 (24 hours) |
| 100718 | Iosa | Jeff | M | FL | US | 64 | Long Haul 100M 2025 (30 hours) † |
| 108314 | Irons | Thomas | M | CA | US | 16 | Canyons by UTMB 100M 2025 (35 hours) |
| 100608 | Irving | Stephanie | F | WA | US | 256 | Black Canyon 100km 2025 (17 hours) † |
| 111276 | Ishii | shogo | M | Tokyo | JP | 4 | FunTrails Chichibu & Okumusashi 105km 2024 (30 hours) |
| 117729 | Ishikawa | Ryosuke | M | Aichi | JP | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 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) |
| 123172 | Iverach | John | M | NSW | AU | 2 | Ultra-Trail Australia by UTMB 100km 2025 (19 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) |
| 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) |
| 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) |
| 116601 | Jackson | David | M | Massachusetts | US | 4 | Cruel Jewel 106M 2025 (48 hours) |
| 103271 | Jackson | Jacob | M | CA | US | 64 | San Diego 100M 2025 (32 hours) |
| 119912 | Jackson | Katti | F | NC | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 108207 | Jackson | Matthew | M | AR | US | 16 | Arkansas Traveler 100M 2025 (30 hours) |
| 100063 | Jackson | William | M | WI | US | 2 | Tunnel Hill 100M 2024 (30 hours) |
| 104879 | Jacobs | Anthony | M | ID | US | 32 | Beaverhead 100km 2025 (20 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) † |
| 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) |
| 119813 | Jahnke | Patrick | M | North Rhine Wetsfalia | DE | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 124127 | Jakob | Simon | M | Bayern | DE | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 100158 | Jalmin | Loic | M | FRA | FR | 128 | Kerry Way Ultra 193km 2025 (40 hours) |
| 113598 | James | Brian | M | North Carolina | US | 8 | Long Haul 100M 2025 (30 hours) † |
| 124732 | James | Megan | F | AR | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 124398 | Janek | Tomas | M | Czech Republic | US | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 117349 | Jankowski | John | M | CA | US | 4 | South Downs Way 100M 2025 (30 hours) |
| 124153 | Jann | Christian | M | SC | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 124568 | Jansen | David | M | Ontario | CA | 1 | Twisted Branch 100km 2025 (20 hours) † |
| 111291 | Janulaitis | Lukas | M | NH | US | 8 | Swiss Alps 100M 2025 (50 hours) |
| 119479 | Jarema | Carl | M | MI | US | 2 | Hellbender 100M 2025 (40 hours) † |
| 123957 | Jaten | Rachel | F | Washington | US | 1 | Black Canyon 100km 2025 (17 hours) |
| 114796 | JEAN | DOMINIQUE | M | LOIRET | FR | 2 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 119913 | Jefferies | Adam | M | Ontario | CA | 2 | Sulphur Springs 100M 2025 (30 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) |
| 101134 | Jennings | Denzil | M | OR | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 121380 | Jennings | Megan | F | Oregon | US | 2 | Mountain Lakes 100M 2025 (30 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) |
| 111253 | Jensen | Justin | M | ID | US | 4 | Crazy Mountain 100M 2025 (36 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) |
| 110307 | JI | Hang | M | Paris | FR | 4 | La Mision 160km 2025 (72 hours) |
| 107431 | Jia | Haiyan | M | CA | US | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 120068 | Jiang | Charles | M | Pennsylvania | US | 2 | Worlds End 100km 2025 (19 hours) |
| 123947 | Jilk | Tylor | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 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) |
| 117722 | Jodrey | Nora | F | MD | US | 2 | Cascade Crest 100M 2025 (34 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) |
| 108642 | Johansson | Johan | M | Skåne | SE | 4 | Thames Path 100M 2025 (30 hours) |
| 107926 | Johnson | Andrew | M | Utah | US | 8 | Wasatch Front 100M 2025 (36 hours) † |
| 101257 | Johnson | Bertram | M | VT | US | 128 | Bighorn 100M 2025 (35 hours) |
| 115327 | Johnson | Brandon | M | IN | US | 2 | Karkloof 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) |
| 100574 | Johnson | Clint | M | GA | US | 32 | Georgia Death Race 74M 2025 (24 hours) † |
| 121134 | Johnson | Eric | M | Minnesota | US | 2 | Javelina Jundred 100M 2025 (30 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) † |
| 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) † |
| 113336 | Johnson | Tyler | M | Colorado | US | 4 | Hennepin 100M 2025 (30 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) |
| 120690 | Joines | Rob | M | Surrey | GB | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 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) |
| 124652 | Jones | Cole | M | Tx | US | 1 | Leadville Trail 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) |
| 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) |
| 119329 | Jones | Kade | M | UT | US | 2 | Zion 100km 2025 (19 hours) |
| 124435 | Jones | Kris | M | Tennessee | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 103171 | Jones | Lyn | M | ON | CA | 128 | Sulphur Springs 100km 2025 (18 hours) |
| 116664 | jones | neil | M | Bc | CA | 4 | Fat Dog 100km 2025 (24 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) |
| 107374 | Jones | Will | M | Tn | US | 4 | Canyons by UTMB 104km 2025 (20 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) † |
| 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) |
| 110209 | Joshi | Piyush | M | Washington | US | 16 | San Diego 100M 2025 (32 hours) † |
| 112865 | Jovanovic | Velibor | M | Slovenia | SI | 4 | Tenerife Bluetrail by UTMB 110 km 2025 (26 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) |
| 119495 | Jun | Jong Ju | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124533 | Jungers | Matthew | M | Wisconsin | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 123600 | Junod | Alexander | M | Vaud | CH | 1 | Trail Verbier St Bernard by UTMB 140km 2025 (40 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) |
| 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) |
| 101684 | Kabanuck | Richard | M | TX | US | 64 | Leadville Trail 100M 2025 (30 hours) |
| 120793 | Kabylbekov | Bakhyt | M | Almaty | KZ | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 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) |
| 124040 | kage brennan | kage brennan | M | Hampshire | US | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 119867 | Kahl | Christoph | M | Hessen | DE | 2 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 hours) |
| 119910 | Kählke | Lukas | M | Bavaria | DE | 2 | Nice Côte d'Azur by UTMB 107km 2025 (28 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) |
| 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) |
| 118452 | KALMAR | ROI | M | Israel | IL | 4 | Wildstrubel by UTMB 110km 2025 (27 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) † |
| 116343 | Kania | Dave | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124320 | Karimi | Elham | F | California | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 123929 | Karlik | Radomir | M | Czech Republic | CZ | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 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) |
| 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) † |
| 122155 | Kawaguchi | Makoto | M | Singapore | SG | 2 | HOKA Chiang Mai Thailand by UTMB Trans-Int 160 175km 2024 (48 hours) |
| 115756 | Kawakami | Naoaki | M | Ibaraki | JP | 4 | Mt Fuji 100M 2025 (46 hours) |
| 112906 | Kay | Sharlota | F | NY | US | 8 | Cascade Crest 100M 2025 (34 hours) |
| 123812 | Kazman | Fidel | M | Bavaria | DE | 1 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 hours) |
| 122181 | Keane | Josh | M | Ohio | US | 2 | Canal Corridor 100M 2025 (30 hours) † |
| 122070 | Keck | Chris | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 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) |
| 111908 | Keffer | Philip | M | Vermont | US | 8 | Vermont 100km 2025 (17 hours) |
| 102518 | Keith | Alissa | F | VA | US | 32 | Hellgate 100km 2024 (17 hours) |
| 100998 | Kelley | Rachel | F | NC | US | 8 | Cruel Jewel 106M 2025 (48 hours) † |
| 124118 | Kelly | Deanna | F | ON | CA | 1 | Sulphur Springs 100M 2025 (30 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) |
| 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) |
| 112693 | Kelsey | Rob | M | IL | US | 8 | Hennepin 100M 2025 (30 hours) † |
| 117539 | Kemp | Angie | F | AZ | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 123841 | Kemp | Richard | M | Virginia | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 124414 | Kempkes | Tyler | M | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 124287 | Kendall | Rachel | F | IL | US | 1 | Zion 100km 2025 (19 hours) |
| 100026 | Kenealy | Douglas | M | AUS | AU | 16 | Blackall 100km 2025 (18 hours) |
| 116465 | Kennedy | Cian | M | Cork | IE | 4 | Autumn 100M 2025 (28 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) † |
| 118464 | Kent | William | M | OK | US | 2 | Gorge Waterfalls 100km 2025 (18 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) † |
| 123879 | Kerrison | Scott | M | Oslo | NO | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 106883 | Kershen | Michael | M | CO | US | 64 | Cocodona 250M 2025 (125 hours) |
| 123522 | Keßler | Yvonne | F | NRW | DE | 1 | Zugspitz 100M 2025 (48 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) † |
| 123431 | Khalid | Sam | M | GB | GB | 1 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 110699 | Kibreab | Elias | M | ON | CA | 4 | Sulphur Springs 100km 2025 (18 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) |
| 120177 | Kievit | Forrest | M | NE | US | 2 | Rim to River 100M 2025 (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) † |
| 118331 | Kim | Moon Hwan | M | Seoul | KR | 4 | 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) |
| 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) |
| 124091 | King | Austin | M | Ohio | US | 1 | Eastern States 100M 2025 (36 hours) |
| 124799 | King | Greg | M | CA | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 113137 | King | Josh | M | AB | CA | 8 | Canadian Death Race 118km 2025 (24 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) † |
| 124432 | Kinney | Tom | M | CO | US | 1 | Leadville Trail 100M 2025 (30 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) |
| 116414 | Kirby | Steve | M | Ohio | US | 2 | Umstead 100M 2025 (30 hours) |
| 114154 | Kirkman | Derek | M | FL | US | 8 | Long Haul 100M 2025 (30 hours) † |
| 108540 | Kirkwood | Peter | M | IN | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 111112 | Kjartansdottir | Andrea | F | Reykjavik | IS | 4 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 112038 | Klassen | Lindsey | F | CA | US | 8 | Canyons by UTMB 100M 2025 (35 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) † |
| 109676 | Klein | Michael | M | UT | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 124325 | Kleiner | Eike | M | Baden-Württemberg | DE | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 105494 | Kleinman | Aaron | M | CA | US | 16 | IMTUF 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) † |
| 121159 | Kleven | James | M | WI | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 107358 | Kline | Vanessa | F | NJ | US | 4 | C & O Canal 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) |
| 124725 | Knauss | Daniel | M | MA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 124694 | Knettel | Jacob | M | Texas | US | 1 | Rim to River 100M 2025 (32 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) † |
| 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) |
| 119274 | Knox | Caitlin | F | BOP | NZ | 2 | Taupo 100km 2025 (17 hours) |
| 124677 | Knudson | Rachael | F | California | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 108272 | koch | kristopher | M | TX | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 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) |
| 123586 | Koepf | Alexandra | F | MI | US | 1 | Sulphur Springs 100km 2025 (18 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) |
| 108233 | Kolb | Adam | M | PA | US | 8 | Long Haul 100M 2025 (30 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) † |
| 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) |
| 102551 | Kontovich | Patrick | M | TN | US | 4 | Angeles Crest 100M 2025 (36 hours) † |
| 110070 | Koopmans | Carl | M | WA | US | 8 | Quicksilver 100km 2025 (17 hours) † |
| 111242 | Kopelov | Labe | M | Indiana | US | 4 | Indiana 100M 2025 (30 hours) |
| 121577 | Korbel | Jason | M | Iowa | US | 2 | Kettle Moraine 100M 2025 (30 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) |
| 112705 | Kornegay | Matt | M | NC | US | 8 | Hellbender 100M 2025 (40 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) |
| 124090 | Kos | Piotr | M | Polska | PL | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 123706 | Koso | Carrie | F | Alaska | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 109886 | Kostanic Juric | Karmen | F | Zagreb | HR | 2 | Ultra Trail Vipava Valley 165km 2025 (46 hours) |
| 124485 | Kotabish | Erica | F | OH | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 111366 | Kovach | Marissa | F | Pennsylvania | US | 4 | Eastern States 100M 2025 (36 hours) |
| 118930 | Kowalkiewicz | Marek | M | Queensland | AU | 4 | Guzzler Ultra 100km 2025 (24 hours) |
| 111357 | Krabel | Herbert | M | SC | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 111788 | Krähenbühl | Samuel | M | Zug | CH | 4 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 118584 | Kralj | Heather | F | TN | US | 4 | Javelina Jundred 100M 2025 (30 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) † |
| 124113 | Krasnoselskiy | Boris | M | Barcelona | ES | 1 | Ultra Tour Monte Rosa 170km 2025 (60 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) |
| 121003 | Kress | Wade | M | TN | US | 1 | No Business 100M 2025 (34 hours) |
| 122231 | Krob | Karen | F | NM | US | 2 | Zion 100M 2025 (36 hours) † |
| 117664 | Kroger | Chris | M | CA | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 102383 | Kropf | Pamela | F | CA | US | 128 | Gorge Waterfalls 100km 2025 (18 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) † |
| 108154 | Krygier | Kenny | M | Delaware | US | 8 | Canal Corridor 100M 2025 (30 hours) † |
| 102413 | Krzysztofik | Marcin | M | GBR | GB | 2 | Bigfoot 206M 2025 (100 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) |
| 112303 | Kudlacek | Ryan | M | TX | US | 4 | Lost Soul Ultra 100km 2025 (21 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) † |
| 111079 | Kuhlman | Emanuela | F | Elbasan | AL | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 122247 | Kuhn | Randi | F | IL - Illinois | US | 1 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 113229 | Kulisch | Jonathan | M | Bavaria | DE | 4 | Zugspitz 100M 2025 (48 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) † |
| 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) |
| 101467 | Kuperstein | Char | F | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 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) † |
| 117670 | Kusakabe | Shinobu | F | MD | US | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 119392 | Kushner | Travis | M | CO | US | 2 | Javelina Jundred 100M 2025 (30 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) † |
| 113869 | Kwiatkowski | Dave | M | Virginia | US | 8 | Hellgate 100km 2024 (17 hours) |
| 124404 | Kyle | Shawn | M | MD | US | 1 | Burning River 100M 2025 (30 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) † |
| 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) |
| 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) † |
| 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) |
| 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) |
| 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) |
| 108150 | Lahille | Thomas | M | -- Sélectionner votre état -- | GB | 16 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 116880 | Laidacker | Laura | F | PA | US | 4 | Eastern States 100M 2025 (36 hours) |
| 113128 | LAKOMIEC | ADAM | M | LONDON | GB | 8 | Autumn 100M 2025 (28 hours) |
| 102091 | Lalus | Robert | M | WA | US | 128 | San Diego 100M 2025 (32 hours) † |
| 100705 | Lam | Bryan | M | DC | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 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) † |
| 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) † |
| 119607 | Lamb | Phil | M | VIC | AU | 2 | Taupo 100km 2025 (17 hours) |
| 115133 | Lambeck | Steven | M | Thueringen | DE | 4 | Zugspitz 106km 2025 (25 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) |
| 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) |
| 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) † |
| 124537 | Landau | Andrew | M | London | GB | 1 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 116715 | Landis | Zach | M | PA | US | 4 | Never Summer 100km 2025 (23 hours) |
| 124206 | Lane | Frank | M | PA | US | 1 | Never Summer 100km 2025 (23 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) † |
| 119713 | Lang | Susan | F | WA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 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) |
| 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) † |
| 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) |
| 124653 | Lantzy | Patrick | M | Texas | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 120538 | Lanzoni | Candice | F | MA | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 123703 | Lapp | Kobe | M | OH | US | 1 | Canal Corridor 100M 2025 (30 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) |
| 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) † |
| 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) |
| 101740 | Larson | Ryan | M | CO | US | 128 | Hardrock 100M 2025 (48 hours) † |
| 102916 | Lascar | Philippe | M | AUS | AU | 8 | Transjeju by UTMB 107km 2025 (25 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) |
| 123689 | Launay | Polly | F | IL | US | 1 | Hennepin 100M 2025 (30 hours) |
| 124471 | Law | Andy | M | London | GB | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 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) † |
| 121839 | Lawrie | Eric | M | Ontario | CA | 2 | Mohican 100M 2025 (32 hours) |
| 102114 | Lay | Christopher | M | MA | US | 32 | Twisted Branch 100km 2025 (20 hours) † |
| 100750 | Lazareanu | Razvan | M | ON | CA | 64 | Massanutten 100M 2025 (36 hours) † |
| 115199 | Le Bras | Erwan | M | Kanagawa | JP | 4 | Mt Fuji 100M 2025 (46 hours) |
| 124318 | Le Hingrat | Albin | M | QC | CA | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 123468 | Leaman | Craig | M | NH | US | 1 | Canyons by UTMB 100M 2025 (35 hours) |
| 121637 | Learned | David | M | CA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 120371 | Lebowitz | Sam | M | New York | US | 2 | Worlds End 100km 2025 (19 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) |
| 119615 | Lee | Barbara | F | AZ | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 113259 | Lee | Cheuk Hin Raymond | M | New Territories | HK | 8 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 123870 | Lee | David | M | TX | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 101455 | Lee | David | M | CO | US | 2 | Oregon Cascades 100M 2025 (32:01:18 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) |
| 107999 | Leech | David | M | Berkshire | GB | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 119437 | Lefevere | Dennis | M | Antwerp | BE | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 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) |
| 121211 | Lehec | Martin | M | Yvelines | FR | 2 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 124154 | Leischow | Nicholas | M | GA | US | 1 | Massanutten 100M 2025 (36 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) † |
| 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) † |
| 107586 | Leonard | Doug | M | OR | US | 16 | Waldo 100km 2025 (18 hours) † |
| 120335 | Leonard | Ryan | M | Utah | US | 2 | Gorge Waterfalls 100km 2025 (18 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) |
| 119293 | Leppan | Jordan | M | Kwazulu Natal | ZA | 1 | Karkloof 100M 2025 (36 hours) |
| 124309 | Lerch | Joshua | M | CA | US | 1 | Leona Divide 100km 2025 (17 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) |
| 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) |
| 112752 | Lesniak | Michael | M | Illinois | US | 8 | Canyons by UTMB 104km 2025 (20 hours) |
| 118453 | LESUEUR | Tanguy | M | MARNE | PF | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 115406 | Letendre | Rémi | M | QC | CA | 4 | Grindstone by UTMB 100M 2025 (36 hours) |
| 119621 | Lewis | Chad | M | CA | US | 2 | Cuyamaca 100km 2025 (17 hours) † |
| 124176 | Lewis | James | M | Florida | US | 1 | Cruel Jewel 106M 2025 (48 hours) † |
| 108578 | Lewis | Sara | F | CA | US | 1 | Umstead 100M 2025 (30 hours) |
| 107644 | Leyva | Marco | M | CA | US | 4 | Cuyamaca 100km 2025 (17 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) † |
| 124203 | Li | Jasmine | F | MA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 111459 | Li | Yiran | M | CO | US | 8 | Miwok 100km 2025 (15:30:59 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) † |
| 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) † |
| 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) |
| 107424 | Lim | Arnold | M | Wisconsin | US | 16 | Grindstone by UTMB 100km 2025 (18 hours) |
| 121857 | Lim | Handa | M | Others | SG | 2 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 104807 | Lim | Jyh Hann | M | MYS | MY | 8 | Malaysia Mountain Marathon 100km 2024 (26 hours) |
| 112755 | LIN | YIHAN | M | Taichung | TW | 2 | Formosa Trail 104km 2024 (28 hours) |
| 110329 | lind | george | M | Arizona | US | 4 | Javelina Jundred 100M 2025 (30 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) |
| 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) † |
| 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) † |
| 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) |
| 115445 | LiPuma | Eric | M | VT | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 120437 | Liu | Ai Dong | F | British Columbia | CA | 2 | Black Canyon 100km 2025 (17 hours) † |
| 115610 | Liu | Jicheng | M | MD | US | 4 | Umstead 100M 2025 (30 hours) |
| 111978 | Liu | Zitao | M | NY | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 123607 | Livingston | Dean | M | AB | CA | 1 | Lost Soul Ultra 100km 2025 (21 hours) |
| 103226 | Livingstone | Peter | M | NM | US | 8 | Javelina Jundred 100M 2025 (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) |
| 104208 | Locke | Joshua | M | AZ | US | 64 | Black Canyon 100km 2025 (17 hours) † |
| 124525 | Logan | Chase | M | VA | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 116793 | Logelin | Joseph | M | BC | CA | 4 | Hood Hundred 100M 2025 (34 hours) |
| 101376 | Logsdon | Cory | M | NE | US | 64 | Canyons by UTMB 104km 2025 (20 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) |
| 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) † |
| 103017 | Long | Kimani | M | NC | US | 256 | Canal Corridor 100M 2025 (30 hours) † |
| 111952 | Longabaugh | Reid | M | TX | US | 8 | Bigfoot 206M 2025 (100 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) † |
| 124116 | Lorenzen | John | M | CO | US | 1 | Bighorn 100M 2025 (35 hours) |
| 115627 | Lotz | Missy | F | Oregon | US | 2 | Waldo 100km 2025 (18 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) |
| 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) |
| 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) † |
| 117199 | Löw | Johannes | M | Baden Württemberg | DE | 4 | Zugspitz 106km 2025 (25 hours) |
| 124246 | Lowe-Wylde | Ian | M | Alberta | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 120046 | Lowry | Matthew | M | Nevada | US | 2 | Zion 100km 2025 (19 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) † |
| 124278 | Lozoya | Edgar | M | Texas | US | 1 | Moab 238M 2025 (108 hours) † |
| 112223 | Lu | Qi | F | California | US | 4 | Quicksilver 100km 2025 (17 hours) † |
| 112652 | Lubin | Todd | M | New York | US | 4 | Vermont 100km 2025 (17 hours) |
| 114268 | Lucas | John | M | CA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 124290 | Lukens | Penn | M | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 102600 | Lunger | Matthew | M | CO | US | 32 | Run Rabbit Run 100M 2025 (36 hours) |
| 117489 | Luscher | DJ | M | NM | US | 4 | Black Canyon 100km 2025 (17 hours) † |
| 124045 | Lütke Lanfer | Tobias | M | Hessen | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 103193 | Ly | Lam | M | CA | US | 2 | Javelina Jundred 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) |
| 109453 | Lynch | Doug | M | Kentucky | US | 16 | Canyons by UTMB 104km 2025 (20 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) |
| 117401 | Łyjak | Błażej | M | Dolnośląskie | PL | 2 | Javornika 105km 2025 (24 hours) |
| 124676 | MacFarlane | Kerri | F | CA | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 112449 | Machus | Hunter | M | Montana | US | 4 | Hood Hundred 100M 2025 (34 hours) |
| 120994 | Mack | Kristoffer | M | New York | US | 2 | Vermont 100M 2025 (30 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) |
| 116314 | Macy | Brenden | M | Colorado | US | 1 | Indiana 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) |
| 115888 | Madono | Mari | F | Tokyo | JP | 4 | Bear, The 100M 2025 (36 hours) † |
| 115360 | Madsen | Brandon | M | Utah | US | 4 | Wasatch Front 100M 2025 (36 hours) † |
| 124644 | Madson | Bethany | F | LA | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 119903 | Magee | James | M | VA | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124135 | Magee | Will | M | Cheshire | GB | 1 | Lakeland 100M 2025 (40 hours) |
| 124392 | Maguire | Timothy | M | Minnesota | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 102821 | Mahn | Morgan | M | MO | US | 1 | Western States 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) |
| 108040 | Main | Barry | M | PA | US | 16 | Bighorn 100M 2025 (35 hours) |
| 100552 | Maisel | Andrew | M | DC | US | 32 | Grindstone by UTMB 100km 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) |
| 123683 | Makim | Ayesha | F | Western Province | ZA | 1 | Ultra Trail Drakensberg 100km 2025 (23 hours) |
| 124468 | Makrutzki | Luca | M | Baden-Württemberg | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 101595 | Malherbe | Martin | M | ZAF | ZA | 32 | Ultra Trail Drakensberg 163km 2025 (48 hours) |
| 109820 | Malina | Mike | M | WA | US | 8 | Bighorn 100M 2025 (35 hours) |
| 110038 | Malkowski | Eric | M | UT | US | 16 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 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) |
| 123930 | Malyovany | Edward | M | Ohio | US | 1 | Canal Corridor 100M 2025 (30 hours) † |
| 111455 | MAMADA | MITSUKAZU | M | N/A | JP | 8 | HURT 100M 2025 (36 hours) † |
| 106382 | Manganello | Michael | M | CO | US | 32 | TOR130 - Tot Dret 130km 2025 (44 hours) |
| 115614 | Manimbo | Daniel | M | CO | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 111841 | Mankekar | Durgesh | M | Massachusetts | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 124598 | Mann | Richard | M | Illinois | US | 1 | No Business 100M 2025 (34 hours) |
| 110621 | Mannhard | Jacquie | F | CO | US | 8 | High Lonesome 100M 2025 (37 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) |
| 116064 | manzano | janssen | M | ca | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 110587 | Maquinalez | Felicia | F | California | US | 8 | Quicksilver 100km 2025 (17 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) |
| 124242 | Marble | Derek | M | Maryland | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 115749 | MARCHAND | Benjamin | M | Loire Athlantique | FR | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 122331 | Marchelli | Simone | M | Italy | IT | 2 | Morenic Trail 119km 2025 (22 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) |
| 108380 | Marion | Stacey | F | WA | US | 8 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 123341 | Markevicus | Andy | M | IL | US | 2 | Kettle Moraine 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) † |
| 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) † |
| 110024 | Marsh | Donald | M | WV | US | 4 | Indiana 100M 2025 (30 hours) |
| 116682 | Marsh | Kevin | M | ID | US | 2 | Cascade Crest 100M 2025 (34 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) |
| 105186 | Marshall | Kristin | F | CO | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 124520 | Martin | Blake | M | AZ | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 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) |
| 123931 | Martin | David | M | OR | US | 1 | Mountain Lakes 100M 2025 (30 hours) † |
| 101230 | Martin | Frédéric | M | CHE | CH | 8 | Eiger Ultra Trail 250km 2025 (90 hours) |
| 123984 | Martin | James | M | North Carolina | US | 1 | Long Haul 100M 2025 (30 hours) |
| 123542 | Martin | James | M | Northants | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 124519 | Martin | Landon | M | TX | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 100485 | Martin | Nick | M | CO | US | 128 | Black Canyon 100km 2025 (17 hours) † |
| 123664 | Martin | Regis | M | Singapore | SG | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 116136 | Martin | Scott | M | OR | US | 4 | Crazy Mountain 100M 2025 (36 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) † |
| 100779 | Martinez | Jadd | M | CA | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 108603 | Martinez | Leopoldo | M | Tx | US | 8 | Javelina Jundred 100M 2025 (30 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) |
| 124056 | Martins | Rodrigo | M | NSW | AU | 1 | Tarawera by UTMB 100M 2025 (36 hours) |
| 124068 | Marvin | Taylor | M | Iowa | US | 1 | Never Summer 100km 2025 (23 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) |
| 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) |
| 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) † |
| 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) † |
| 109645 | Mastrotto | Roberto | M | VI | IT | 16 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 120671 | Masur | Stephanie | F | Alberta | CA | 2 | Zion 100km 2025 (19 hours) |
| 120474 | Matena | Valerie | F | NC | US | 2 | Grindstone by UTMB 100km 2025 (18 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) |
| 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) † |
| 115632 | Mathis | Verity | F | FL | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 123813 | Matousek | Zdenek | M | Czech Republic | CZ | 1 | Krakonosova Stovka 100km 2025 (22 hours) |
| 124152 | Mattar | Nadia | F | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 124196 | Matthias | Philip | M | Baden Württemberg | DE | 1 | SwissPeaks 100km 2025 (28 hours) |
| 124030 | MATUSEVICIUS | LAIMONAS | M | VILNIUS | LT | 1 | Zugspitz 106km 2025 (25 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) |
| 101996 | Mavricos | Chantal | F | CO | US | 32 | California Fall Classic at Lake Sonoma 100km 2025 (19 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) † |
| 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) † |
| 116946 | Mayorga | Aura | F | California | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 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) † |
| 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) |
| 124019 | McArtor | Cory | M | KY | US | 1 | San Diego 100M 2025 (32 hours) † |
| 115400 | McBride | Theresa | F | Oklahoma | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 111593 | McCabe | Kevin | M | NC | US | 8 | Hellbender 100M 2025 (40 hours) † |
| 115461 | McCarl | Chad | M | North Carolina | US | 1 | Western States 100M 2025 (30 hours) † |
| 124039 | McCarthy | David | M | Central Bedfordshire | GB | 1 | Autumn 100M 2025 (28 hours) |
| 108148 | McCartney | David | M | IN | US | 2 | Long Haul 100M 2025 (30 hours) † |
| 124691 | McCauley | Connor | M | NC | US | 1 | Hellbender 100M 2025 (40 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) † |
| 115668 | McCormick | Blair | M | WI | US | 4 | Waldo 100km 2025 (18 hours) † |
| 117280 | McCormick | Shay | M | TN | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 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) † |
| 123725 | McCue | Connor | N | Michigan | US | 1 | Rabid Raccoon 100km 2025 (22 hours) |
| 102458 | Mcdearmon | Robin | M | CA | US | 8 | Javelina Jundred 100M 2025 (30 hours) † |
| 111457 | McDole | Josh MCDole | M | WI | US | 4 | Bigfoot 206M 2025 (100 hours) † |
| 105001 | McDonald | Mike | M | CA | US | 128 | Pine to Palm 100M 2025 (34 hours) † |
| 122255 | McDonald | Tommy | M | Alberta | CA | 2 | Canadian Death Race 118km 2025 (24 hours) |
| 101276 | McDowell | Amy | F | NC | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 124016 | McEwen | Max | M | Pembrokeshire | GB | 1 | West Highland Way 95M 2025 (30 hours) |
| 100918 | McGee | John | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 124664 | McGill | Kelsey | F | OR | US | 1 | Bigfoot 206M 2025 (100 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) † |
| 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) |
| 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) |
| 112604 | Mckenna | Gareth | M | East Dunbartonshire | GB | 8 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 108045 | Mckenzie | Debra | F | Florida | US | 8 | Bear, The 100M 2025 (36 hours) † |
| 113331 | McKenzie | Tim | M | NV | US | 8 | San Diego 100M 2025 (32 hours) † |
| 102285 | McKune | John | M | CA | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 124189 | McLendon | Kevin | M | KY | US | 1 | Hellgate 100km 2024 (17 hours) |
| 118874 | McMahon | John | M | Queensland | AU | 4 | Guzzler Ultra 100km 2025 (24 hours) |
| 111115 | McManaway | Neil | M | OR | US | 8 | Pine to Palm 100M 2025 (34 hours) † |
| 109719 | McMeans | Keri | U | WY | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 103476 | Mcmillan | Eric | M | TX | US | 16 | Arkansas Traveler 100M 2025 (30 hours) |
| 107949 | McNally | Paula | F | CA | US | 16 | Black Canyon 100km 2025 (17 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) |
| 116584 | McNeil | Cody | M | VT | US | 2 | Tahoe 202M 2025 (100 hours) † |
| 124590 | Mcneill | Lillian | F | OR | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 106933 | McNicol | Michael | M | Montana | US | 8 | Bighorn 100M 2025 (35 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) |
| 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) † |
| 124372 | Mcwherter | Tyler | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 109730 | McWilliams | Kevin | M | ID | US | 2 | Fat Dog 100km 2025 (24 hours) |
| 120946 | Meades-Woolley | Ellis | M | Hampshire | GB | 2 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 102928 | Meadows | Jesse | M | VA | US | 32 | Rim to River 100M 2025 (32 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) |
| 111930 | Medina | Lily | F | Illinois | US | 4 | Kettle Moraine 100M 2025 (30 hours) † |
| 100122 | Meinke | Markus | M | DEU | DE | 16 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 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) |
| 114916 | Melchers | Andrew | M | OH | US | 4 | No Business 100M 2025 (34 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) |
| 120231 | Mendez | Osman | M | Wa | US | 2 | Hood Hundred 100M 2025 (34 hours) |
| 123592 | Mendonca | Jason | M | Oxfordshire | GB | 1 | Thames Path 100M 2025 (30 hours) |
| 107148 | MENDOZA | FERNANDO | M | LA LIBERTAD | SV | 8 | Georgia Death Race 74M 2025 (24 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) |
| 123823 | Mercu | Robert | M | Ontario | CA | 1 | Fat Dog 100km 2025 (24 hours) |
| 116332 | Meskell | Brian | M | Tipperary | IE | 4 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 123157 | Metaxas | Chris | M | Ontario | CA | 2 | Bear, The 100M 2025 (36 hours) † |
| 116848 | Metzger | Daniel | M | CO | US | 2 | Black Canyon 100km 2025 (17 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) † |
| 124508 | Meyer | Derek | M | Oregon | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 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) |
| 124373 | Meza | Ethan | M | California | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 108983 | Miao | David | M | NY | US | 16 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 118533 | Michael | Andrew | M | OH | US | 4 | No Business 100M 2025 (34 hours) |
| 103940 | Michael | Sean | M | WA | US | 16 | Waldo 100km 2025 (18 hours) † |
| 119745 | Michell | Ross | M | WA | US | 2 | Beaverhead 100km 2025 (20 hours) |
| 113807 | Mick | Josh | M | California | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 121205 | Middleton | Autumn | F | CA | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 116306 | Midkiff | Tanner | M | BC | CA | 4 | Hood Hundred 100M 2025 (34 hours) |
| 106940 | Mihalik | Norbert | M | Borsod-Abaúj-Zemplén | HU | 8 | Autumn 100M 2025 (28 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) † |
| 113742 | Milburn | Ben | M | Ontario | CA | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 113192 | Miles | James | M | British Columbia | CA | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 117985 | Milet | Ludovic | M | Paca | FR | 4 | Grand Raid La Reunion 162km 2025 (50 hours) |
| 107636 | Millbery | Spencer | M | London | GB | 16 | North Downs Way 100M 2025 (30 hours) |
| 101199 | Miller | Darren | M | PA | US | 32 | Moab 238M 2025 (108 hours) † |
| 103751 | Miller | David | M | OR | US | 16 | Hardrock 100M 2025 (48 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) † |
| 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) |
| 119833 | Miller | Michael | M | New York | US | 2 | Sulphur Springs 100km 2025 (18 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) † |
| 116301 | milli | francesco | M | FI | IT | 4 | Tuscany Crossing 103km 2025 (21 hours) |
| 120669 | Minakov | Aleksey | M | Moscow | RU | 2 | Golden Ring 100km 2025 (18 hours) |
| 112313 | Mino Faukner | Helen | F | California | US | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 124740 | Minski | Jason | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 100662 | Mintz | Jason | M | NY | US | 8 | Canal Corridor 100M 2025 (30 hours) † |
| 103643 | Mintz | Trish | F | ON | CA | 64 | Sulphur Springs 100km 2025 (18 hours) |
| 115190 | Mirynech | Bre | F | British Columbia | CA | 2 | Fat Dog 100km 2025 (24 hours) |
| 120319 | Misenhimer | Logan | M | Colorado | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 113626 | Mister | Brian | M | NC | US | 8 | Hood Hundred 100M 2025 (34 hours) |
| 112930 | Mitchell | Lauren | F | Minnesota | US | 8 | Sean O'Brien 100km 2025 (17 hours) † |
| 104184 | Mitchum | Benji | M | AL | US | 32 | Arkansas Traveler 100M 2025 (30 hours) |
| 123999 | MITRANI | SEBASTIEN | M | Alpes Maritimes | FR | 1 | Dalmacija Ultra Trail 122km 2025 (32 hours) |
| 104718 | Miura | Sho | M | JPN | JP | 4 | OSJ Ontake 100km 2025 (20 hours) |
| 122624 | miyagawa | kazuhito | M | Kanagawa | JP | 2 | Okushinano 100km 2025 (21 hours) |
| 119699 | mizutani | kanta | M | ishikawa | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 105329 | Moe | Eric | M | CA | US | 2 | San Diego 100M 2025 (32 hours) † |
| 120464 | Moe | Malcolm | M | Arkansas | US | 2 | Dinosaur Valley 100km 2024 (22 hours) |
| 123936 | Moersch | Joel | M | Oregon | US | 1 | C & O Canal 100M 2025 (30 hours) † |
| 116734 | Moget | Frederic | M | Paris | FR | 2 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 116539 | Mogg | Jonathan | M | Ontario | CA | 4 | Sulphur Springs 100M 2025 (30 hours) |
| 116430 | mohammed | kaleel | M | North Carolina | US | 4 | Umstead 100M 2025 (30 hours) |
| 117406 | Mohn | Benjamin | M | New York | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 108907 | Mohr | Chase | M | OH | US | 16 | Superior 100M 2025 (38 hours) † |
| 120705 | Mohr | Jeffrey | M | California | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 119598 | Moiana | Matteo | M | Lombardia | IT | 2 | Swiss Canyon Trail 111km 2025 (24 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) † |
| 116271 | Molnar | Almos | M | RI | US | 4 | Twisted Branch 100km 2025 (20 hours) † |
| 124064 | Mombelet | Yvan | M | Haute savoie | FR | 1 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 100851 | Monesmith | Josh | M | IN | US | 32 | Canyons by UTMB 104km 2025 (20 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) |
| 101015 | Montgomery | Robert | M | NV | US | 128 | Hardrock 100M 2025 (48 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) † |
| 120090 | Moore | Alexander | M | United Kingdom | GB | 2 | North Downs Way 100M 2025 (30 hours) |
| 124229 | Moore | Andrew | M | NH | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 112948 | Moore | Eve | F | England | GB | 8 | Ultra-Trail Australia by UTMB 100km 2025 (19 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) † |
| 119846 | Mora | Nicola | M | Lombardia | IT | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 123733 | Moran | John | M | Louisiana | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 114175 | Morel | Adam | M | IN | US | 8 | Rim to River 100M 2025 (32 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) |
| 111482 | Moretti | Marco | M | Liguria | IT | 8 | Tuscany Crossing 103km 2025 (21 hours) |
| 124507 | Morgan | Douglas | M | OH | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 108716 | Morgan | Ian | M | Barcelona | ES | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 108545 | Morgan | Timmy | M | Pennsylvania | US | 8 | Rim to River 100M 2025 (32 hours) † |
| 102588 | Morin | Jean Nicolas | M | QC | CA | 64 | Vermont 100km 2025 (17 hours) |
| 116968 | Morissette | Philippe | M | QC | CA | 4 | Quebec Mega Trail 135km 2025 (32 hours) |
| 108415 | Moriya | Mitsuo | M | Tochigi-ken | JP | 4 | Lake Biwa 100M 2025 (52 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) |
| 107229 | Morris | Dana | M | CA | US | 16 | Leona Divide 100km 2025 (17 hours) |
| 102457 | Morris | Gareth | M | NZL | NZ | 64 | Tarawera by UTMB 100M 2025 (36 hours) |
| 111480 | MOrris | Jenny | F | New South Wales | AU | 4 | North Downs Way 100M 2025 (30 hours) |
| 121147 | Morrison | Allana | F | MT | US | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 115344 | Morse | Faye | F | Gibraltar | GI | 2 | Autumn 100M 2025 (28 hours) |
| 107332 | Mortensen | Zach | M | NC | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 102912 | Morton-Langehaug | Jessi | F | UT | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 124487 | Moser | Adriana | F | Tyrol | AT | 1 | Istria by UTMB 168km 2025 (46 hours) |
| 124052 | Moses | Logan | M | NC | US | 1 | Cocodona 250M 2025 (125 hours) |
| 116887 | Moskalski | Timothy | M | DC | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 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) † |
| 100046 | Moss | Kyle | M | CO | US | 64 | Sulphur Springs 100km 2025 (18 hours) |
| 103208 | Mossman | Dawson | M | NB | CA | 8 | Vermont 100km 2025 (17 hours) |
| 119515 | Motte | Guillaume | M | Occitanie | FR | 1 | Grand Raid Ventoux by UTMB 124km 2025 (30 hours) |
| 110312 | MOU | Vincent | M | val de marne | FR | 4 | Mount Yun by UTMB - UMY 159.6km 2025 (48 hours) |
| 101700 | Mower | Clark | M | UT | US | 16 | Black Canyon 100km 2025 (17 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) |
| 119361 | Møller | Christian Balthazar | M | - | DK | 2 | Nice Côte d'Azur by UTMB 159km 2025 (48 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) |
| 122355 | Muenzing | Michael | M | Baden Württemberg | DE | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 119507 | Mukherjee | Shamba | M | West Bengal | IN | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 122146 | Müller-Thorwart | Ole | M | Bavaria | DE | 2 | Chianti Ultra Trail by UTMB 120km 2025 (26 hours) |
| 109909 | Mulligan | Lea | F | TN | US | 16 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 124317 | mullins | kevin | M | co | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 112649 | Muniz | Andrew | M | Arizona | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 120906 | Munro | Matthew | M | Ontario | CA | 2 | Twisted Branch 100km 2025 (20 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) |
| 124772 | Murphy | Clay | M | AR | US | 1 | Arkansas Traveler 100M 2025 (30 hours) |
| 124405 | Murphy | Lorcan | M | MT | US | 1 | Beaverhead 100km 2025 (20 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) † |
| 105675 | Murray | Joshua | M | GBR | GB | 4 | Mozart by UTMB 119km 2025 (23 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) |
| 103623 | Muzelle | Charles | M | FRA | FR | 128 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 115913 | Myers | Andrew | M | Michigan | US | 4 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 109674 | Myers | Scott | M | PA | US | 16 | Hellbender 100M 2025 (40 hours) † |
| 111784 | Nagel | Matthias | M | NRW | DE | 4 | Trail Verbier St Bernard by UTMB 140km 2025 (40 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 | St. Petersburg | RU | 8 | Rocky Raccoon 100M 2025 (30 hours) |
| 108095 | NAKAMURA | TADAKATSU | M | TOKYO | JP | 16 | Shinetsu Five Mountains Trail 110km 2025 (22 hours) |
| 100992 | Nanaszko | Michael | M | OR | US | 64 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 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) |
| 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) |
| 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) † |
| 107822 | Nave | Rich | M | MI | US | 8 | Canal Corridor 100M 2025 (30 hours) † |
| 124105 | Nechodom | Connor | M | Georgia | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 118086 | Neff | Calum | M | TX | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 107996 | Neill | Eric | M | CA | US | 16 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 117236 | Neitzling | Daniel | N | ID | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 120992 | Nelson | Amanda | F | Ontario | CA | 2 | Quebec Mega Trail 135km 2025 (32 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) |
| 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) † |
| 124293 | Neumann | Blake | M | Georgia | US | 1 | No Business 100M 2025 (34 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) † |
| 116243 | Newblom | Austin | M | CA | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 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) |
| 116623 | Newton | Doug | M | CO | US | 2 | Hardrock 100M 2025 (48 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) |
| 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) |
| 123793 | Nguyen | Dao | M | Phu Tho | VN | 1 | Vietnam Mountain Marathon 100km 2025 (27 hours) |
| 101819 | Nguyen | Nhan | M | SC | US | 16 | Hellbender 100M 2025 (40 hours) † |
| 120656 | Nguyen | Tan | M | California | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 109062 | Nguyen | William | M | CA | US | 8 | Pine to Palm 100M 2025 (34 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) |
| 100149 | Nichols | Gary | M | Kentucky | US | 256 | Canal Corridor 100M 2025 (30 hours) † |
| 101750 | Nickelsen | Samuel | M | CA | US | 8 | Waldo 100km 2025 (18 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) † |
| 102021 | Nielsen | Theresa | F | AB | CA | 16 | Fat Dog 120M 2025 (48 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) |
| 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) |
| 120976 | Niino | Takumu | M | NC | US | 2 | Bigfoot 206M 2025 (100 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) |
| 102561 | Niwa | Nozomu | M | JPN | JP | 32 | Lake Biwa 100M 2025 (52 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) † |
| 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) |
| 124292 | Nolan | William | M | MI | US | 1 | Vermont 100km 2025 (17 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) |
| 103054 | Norwood | Zach | M | NE | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 118271 | Nosek | Anna | F | Utah | US | 4 | Cocodona 250M 2025 (125 hours) |
| 109260 | Notari | Paul | M | Massachusetts | US | 2 | Canyons by UTMB 104km 2025 (20 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) |
| 124498 | Novitsky | Nick | M | MI | US | 1 | Yeti Virginia 100M 2025 (30 hours) |
| 108794 | Novobilski | Jen | U | Alaska | US | 2 | Cocodona 250M 2025 (125 hours) |
| 121686 | Nunes | Dawn | F | Kent | GB | 2 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 124730 | Nyakowa | Belinda | F | Massachusetts | US | 1 | Rim to River 100M 2025 (32 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) |
| 117252 | O'Brien | Colin | M | WA | US | 2 | Cocodona 250M 2025 (125 hours) |
| 124020 | O'Brien | Nicholas | M | Wellington | NZ | 1 | Taupo 100km 2025 (17 hours) |
| 107212 | O'Connor | Katie | F | IL | US | 4 | Cocodona 250M 2025 (125 hours) |
| 108659 | O'Donnell | Matthew | M | North Carolina | US | 8 | Miwok 100km 2025 (15:30:59 hours) |
| 108953 | O'Farrell | Michael | M | ON | CA | 4 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 124771 | O'Malley | Nora | F | CO | US | 1 | Cocodona 250M 2025 (125 hours) |
| 124151 | O'Rourke | Emily | F | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 121804 | O’Brien | Kyle | M | Colorado | US | 2 | Leadville Trail 100M 2025 (30 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) † |
| 124079 | Oakley | Luke | M | Hampshire | GB | 1 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 124083 | Oakley | Luke | M | Hampshire | GB | 1 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 121325 | Oatapovich | Rick | M | Ca | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 101167 | Oatis | Doug | M | CO | US | 1 | Western States 100M 2025 (30 hours) † |
| 118955 | Oberto | Jeffrey | M | California | US | 4 | Mountain Lakes 100M 2025 (30 hours) † |
| 123979 | Oboikowitsch | Madison | F | VT | US | 1 | Vermont 100M 2025 (30 hours) |
| 104845 | Obrien | James | M | IL | US | 16 | Indiana 100M 2025 (30 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) |
| 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) † |
| 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) |
| 120703 | Offer | Brendan | M | NJ | US | 2 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 123849 | Ogihara | Tsukasa | M | Ohio | US | 1 | Mamba 100M 2024 (34 hours) † |
| 100319 | Ohler | Michael | M | DEU | DE | 32 | Swiss Alps 100M 2025 (50 hours) |
| 112771 | Ohm | Sarah | F | MI | US | 8 | Bigfoot 206M 2025 (100 hours) † |
| 124004 | Okabe | Akiko | F | kanagawa | JP | 1 | Lake Biwa 100M 2025 (52 hours) |
| 120971 | Oksiuta | Lee | M | WI | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 106100 | Okumura | Tomoaki | M | JPN | JP | 8 | Okushinano 100km 2025 (21 hours) |
| 111147 | Oldham | Ian | M | Teeside | GB | 4 | TOR330 - Tor de Géants 330km 2025 (132 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) † |
| 113114 | Olivero | Anthony | M | nevada | US | 4 | Miwok 100km 2025 (15:30:59 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) |
| 111327 | OLLAGNIER | Jérôme | M | France | FR | 4 | Nice Côte d'Azur by UTMB 107km 2025 (28 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) |
| 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) |
| 124180 | Olson | Michael | M | IL | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 114821 | Olszewski | Pawel | M | Bad Liebenzell | DE | 2 | Trail Verbier St Bernard by UTMB 140km 2025 (40 hours) |
| 112192 | Olvaszto | Daniel | M | Budapest | HU | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 101830 | Opgenorth | Greg | M | CO | US | 128 | Cascade Crest 100M 2025 (34 hours) |
| 111463 | Oravamäki | Maija | F | Pohjois-Pohjanmaa | FI | 8 | Nuts Ylläs Pallas 100km 2025 (22 hours) |
| 105098 | Orillac | Jose | M | PAN | PA | 1 | Western States 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) |
| 121239 | Örn Schulz | Jonathan | M | Scotland | GB | 2 | West Highland Way 95M 2025 (30 hours) |
| 112729 | Orr | Brad | M | SC | US | 8 | Run Rabbit Run 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) † |
| 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) † |
| 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) |
| 124169 | Osborne | Paul | M | Hampshire | GB | 1 | South Downs Way 100M 2025 (30 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) |
| 124117 | Ostuni | Renato | M | N/A | IT | 1 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 109224 | Ott | Matthias | M | Bavaria | DE | 8 | Zugspitz 106km 2025 (25 hours) |
| 115393 | Outram | Matt | M | Northamptonshire | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 116773 | Owenby | Matthew | M | GA | US | 1 | Yeti Virginia 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) † |
| 115499 | Ozanne | William | M | CT | US | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 124313 | Pace | Travis | M | NC | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 124297 | Page | Jesse | M | Indiana | US | 1 | Indiana 100M 2025 (30 hours) |
| 108892 | Page | Vinny | M | BERKSHIRE | GB | 2 | South Downs Way 100M 2025 (30 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) |
| 116929 | Palen | Andrew | M | NY | US | 4 | Black Canyon 100km 2025 (17 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) † |
| 104352 | Palma | Julio | M | Pennsylvania | US | 32 | Hardrock 100M 2025 (48 hours) † |
| 124523 | Palmer | Luke | M | TX | US | 1 | Dinosaur Valley 100M 2024 (35 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) |
| 107606 | Panas | Robert | M | Colorado | US | 16 | High Lonesome 100M 2025 (37 hours) |
| 120809 | Pancake | Mark | M | OH | US | 2 | Vermont 100M 2025 (30 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) † |
| 111083 | Pantis | Alena Maria | F | Hessen | DE | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124492 | PAPA | Peggie | F | Grand Est | FR | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 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) |
| 111979 | Papet | Pierre | M | Greater London | GB | 8 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 117130 | Paprcka | Michal | M | N/A | SK | 4 | Trail Verbier St Bernard by UTMB 140km 2025 (40 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) |
| 115425 | Paris | Raphael | M | Nordrhein-Westfalen | DE | 2 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 106611 | Parise | Justin | M | AUS | AU | 16 | Surf Coast Century 100km 2025 (17 hours) |
| 103732 | Park | James | M | HKG | HK | 64 | Taupo 100km 2025 (17 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) |
| 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) † |
| 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) |
| 100878 | Parks | Casey | M | CA | US | 4 | San Diego 100M 2025 (32 hours) † |
| 123547 | Parnell | Brad | M | Texas | US | 1 | Dinosaur Valley 100km 2024 (22 hours) |
| 106978 | Parnell | Chase | M | 64 | Cuyamaca 100km 2025 (17 hours) † | ||
| 120192 | Parpart | Andrew | M | Ohio | US | 2 | Canal Corridor 100M 2025 (30 hours) † |
| 122217 | Parra | Eugenio | M | Las condes | CL | 2 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 123831 | Parrish | Dustin | M | WI | US | 1 | Kettle Moraine 100M 2025 (30 hours) † |
| 115874 | Partyka | Darren | M | Nevada | US | 4 | Tahoe 202M 2025 (100 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) |
| 119499 | Passmore | Jonah | M | CA | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 116030 | Pastore | Guido | M | Italy | IT | 4 | Ultra Trail Vipava Valley 106km 2025 (25 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) |
| 124357 | Pattee | Mikal | M | Oregon | US | 1 | Mountain Lakes 100M 2025 (30 hours) † |
| 118031 | Patterson | Daniel | M | MO | US | 2 | Tunnel Hill 100M 2024 (30 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) † |
| 122170 | Pattijn | Ernest | M | West-Vlaanderen | BE | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 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) |
| 123993 | Paukner | Manuel | M | Bavaria | DE | 1 | Mozart by UTMB 119km 2025 (23 hours) |
| 120237 | Paul | Louisa | F | CO | US | 2 | Leadville Trail 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) |
| 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) |
| 112170 | Pavlova | Aneta | F | MO | US | 4 | Hennepin 100M 2025 (30 hours) † |
| 111854 | Pawlus | Michael | M | OH | US | 8 | Laurel Highlands 70.5M 2025 (20 hours) |
| 111779 | Paxton | Emma | F | VA | US | 8 | Hellgate 100km 2024 (17 hours) |
| 112114 | Payne | Brandi | F | HI | US | 8 | HURT 100M 2025 (36 hours) † |
| 119203 | Payne | Kyle | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 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) † |
| 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) † |
| 117026 | Pease | David | M | UT | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 111248 | Peck | Graham | M | MD | US | 4 | Umstead 100M 2025 (30 hours) |
| 120778 | PECOUT | DAVID | M | GIRONDE | FR | 2 | Val d’Aran by UTMB, Torn dera Val d’Aran 168km 2025 (48 hours) |
| 106982 | Peddy | Andrew | M | VA | US | 32 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 120639 | Pedlar | Tom | M | ON | CA | 2 | Twisted Branch 100km 2025 (20 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) † |
| 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) |
| 124626 | PELLETANT | Jeremy | M | British Colombia | CA | 1 | TransLantau Ultra Trail by UTMB 120km 2024 (36 hours) |
| 119370 | Pellizzer | Gayle | F | CA | US | 2 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 100238 | Pemsel | Dennis | M | DEU | DE | 64 | Swiss Alps 100M 2025 (50 hours) |
| 101872 | Pence | Ethan | M | UT | US | 32 | Angeles Crest 100M 2025 (36 hours) † |
| 118281 | Penn | Michael | M | PA | US | 2 | Gorge Waterfalls 100km 2025 (18 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) |
| 115701 | Penson-Boucher | Joanne | F | Alberta | CA | 2 | Mamba 100M 2024 (34 hours) † |
| 108125 | Perez | Cory | M | California | US | 16 | San Diego 100M 2025 (32 hours) |
| 112035 | Perez | Jean | M | TX | US | 8 | Cruel Jewel 106M 2025 (48 hours) † |
| 100447 | Perez Colon | Francisco | M | PR | PR | 64 | Sean O'Brien 100km 2025 (17 hours) † |
| 105301 | Pergolizzi | James | M | NY | US | 16 | Worlds End 100km 2025 (19 hours) |
| 122115 | Perin | Charles | M | BC | CA | 2 | HURT 100M 2025 (36 hours) |
| 123413 | Perkins | Kristi | F | OK | US | 1 | Dinosaur Valley 100km 2024 (22 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) |
| 110402 | Perrell | Josh | M | CALIFORNIA | US | 16 | San Diego 100M 2025 (32 hours) † |
| 124668 | Perron | Jade | F | QC | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 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) |
| 122791 | Persels | Matthew | M | Texas | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 112046 | Peter | Mike | M | MI | US | 8 | Tunnel Hill 100M 2024 (30 hours) † |
| 117159 | peters | john | M | NC | US | 2 | No Business 100M 2025 (34 hours) |
| 111887 | Petersen | John | M | CA | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 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) † |
| 102268 | Peterson | Jake | M | IL | US | 2 | Vermont 100M 2025 (30 hours) |
| 102531 | Peterson | Jeremy | M | ID | US | 64 | Beaverhead 100km 2025 (20 hours) |
| 106986 | Peterson | Nicholas | M | CO | US | 1 | Western States 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) |
| 104281 | Petretto | Stephen | M | OR | US | 128 | Pine to Palm 100M 2025 (34 hours) † |
| 119870 | Petrie | Jared | M | ID | US | 2 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 107880 | Petrillo | Michelle | F | CA | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 116206 | Petroski | Ben | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 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) † |
| 110683 | Pfaff | Dustin | M | CA | US | 16 | Canyons by UTMB 104km 2025 (20 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) |
| 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) |
| 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) |
| 124631 | Phillips | Connor | M | WY | US | 1 | Beaverhead 100km 2025 (20 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) |
| 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) † |
| 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) † |
| 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) † |
| 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) |
| 100329 | Piepgrass | Ammon | M | GBR | GB | 32 | SwissPeaks 360km 2025 (156 hours) |
| 122497 | Pierce | Jeffrey | M | Colorado | US | 2 | Leadville Trail 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) |
| 114546 | Piplani | Amit | M | ca | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 124768 | Pirtle | Greg | M | TN | US | 1 | No Business 100M 2025 (34 hours) |
| 102998 | Piskorska | Anna | F | PA | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 100892 | Place | Sarah | F | GBR | GB | 16 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 118239 | Plaisted | Nick | M | Georgia | US | 4 | Run Rabbit Run 100M 2025 (36 hours) |
| 115390 | Platcek | Chris | M | MN | US | 4 | Kettle Moraine 100M 2025 (30 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) |
| 102536 | Plourde | Julia | F | NH | US | 32 | Vermont 100M 2025 (30 hours) |
| 124456 | poehlmann | robert | M | NC - NORTH CAROLINA | US | 1 | Massanutten 100M 2025 (36 hours) † |
| 117726 | Pohl | Christian | M | Gloucestershire | GB | 2 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 108164 | Poland | Andrew | M | CO | US | 16 | Hardrock 100M 2025 (48 hours) † |
| 124085 | Pollard | Jessica | F | NSW | AU | 1 | Kosciusko by UTMB 100M 2024 (36 hours) |
| 124499 | Pomaranski | Andrea | F | MI | US | 1 | Canyons by UTMB 104km 2025 (20 hours) |
| 111900 | Pool | Robert | N | Oregon | US | 4 | High Lonesome 100M 2025 (37 hours) |
| 100888 | Poole | Michael | M | NC | US | 16 | Hardrock 100M 2025 (48 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) † |
| 121359 | Porter | Kevin | M | Colorado | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 120323 | Portilla | Sara | F | TX | US | 2 | Brazos Bend 100M 2024 (32 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) |
| 104021 | Porzucek | Guillaume | M | FRA | FR | 8 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 108047 | Pothin | Shaun | M | TN | US | 8 | Cruel Jewel 106M 2025 (48 hours) † |
| 115290 | Potts | Luke | M | Cheshire | GB | 4 | Valleys Ultra (7) 110km 2025 (25 hours) |
| 103733 | Poulatov | Azam | M | NY | US | 8 | Bear, The 100M 2025 (36 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) |
| 124224 | Power | John | M | Ontario | CA | 1 | Moab 238M 2025 (108 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) |
| 117509 | Pratt | Anthony | M | ENGLAND | GB | 4 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 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) |
| 114472 | Prendeville | Paul | M | Ohio | US | 8 | Eastern States 100M 2025 (36 hours) |
| 115474 | Price | Alex | M | TX | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 115589 | Price | Will | M | Ohio | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 110189 | Pride | Doug | M | IL | US | 16 | Thames Path 100M 2025 (30 hours) |
| 102522 | Primault | Cédric | M | FRA | FR | 32 | Istria by UTMB 110km 2025 (24 hours) |
| 116543 | Privette | Jordan | M | NC | US | 2 | Grindstone by UTMB 100km 2025 (18 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) † |
| 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) † |
| 108347 | Pronske | Keith | M | CA | US | 16 | Pine to Palm 100M 2025 (34 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) |
| 100727 | Pryznyk | Don | M | AB | CA | 32 | California Fall Classic at Lake Sonoma 100km 2025 (19 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) |
| 123949 | Pumpelly | Christian | M | VA | US | 1 | Grindstone by UTMB 100M 2025 (36 hours) |
| 113006 | Putelis | Mahting | M | Colorado | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 124528 | Putre | Brian | M | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 116175 | Pyrah | Orrin | M | MT | US | 4 | Crazy Mountain 100M 2025 (36 hours) † |
| 124630 | qian | chun | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 107533 | qian | xue | F | California | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 123919 | QIU | Tony HONGLIANG | M | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 124578 | Qualls | Meredith | F | TN | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 111454 | Quentin | de Beauvoir | M | France | FR | 4 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Chevaliers 158km 2025 (37 hours) |
| 108363 | quilty | jenny | F | BC | CA | 4 | Fat Dog 120M 2025 (48 hours) † |
| 124359 | Quinn | Connor | M | CO | US | 1 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 115331 | Quinn | Melissa | F | OR | US | 4 | Hennepin 100M 2025 (30 hours) † |
| 118553 | Rabuzzi | Patrick | M | CA | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 116145 | Rachau | Tammy | F | PA | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 124491 | Rader | Austin | M | Kentucky | US | 1 | No Business 100M 2025 (34 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) |
| 115822 | Raff | Ryan | M | AZ | US | 4 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 109427 | Ragainis | Ivars | M | GA | US | 8 | Georgia Death Race 74M 2025 (24 hours) † |
| 113795 | Ragland | Blake | M | Texas | US | 4 | HURT 100M 2025 (36 hours) † |
| 124701 | Rainbolt | Bradley | M | CO | US | 1 | Never Summer 100km 2025 (23 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) † |
| 124173 | Rajic | Boris | M | ON | CA | 1 | Sulphur Springs 100M 2025 (30 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) |
| 124314 | Ralston | Nathaniel | M | Idaho | US | 1 | Beaverhead 100km 2025 (20 hours) |
| 107007 | Rambach | Whit | M | NV | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 106024 | Ramirez | Israel | M | CA | US | 128 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 101772 | Ramirez | Robert | M | CA | US | 4 | 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) |
| 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) |
| 123868 | Rangdé | François | M | Pays de la Loire | FR | 1 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 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) |
| 121679 | Ransom | Colton | M | CA | US | 2 | Miwok 100km 2025 (15:30:59 hours) |
| 107009 | Rao | Shashwat | M | Himachal | IN | 16 | Malnad Ultra 100km 2024 (21 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) |
| 124065 | Ravenscroft | Mark | M | London | GB | 1 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 107197 | Rawls | Jack | M | AL | US | 16 | Black Canyon 100km 2025 (17 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) |
| 120517 | Re | Gabriello | M | Colorado | US | 2 | Leadville Trail 100M 2025 (30 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) |
| 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) † |
| 112204 | Rebolledo | Oscar | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 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) † |
| 115879 | Rediker | Michael | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 103034 | Reed | Andy | M | AB | CA | 64 | Beaverhead 100km 2025 (20 hours) |
| 104722 | Reed | Pam | F | WY | US | 4 | Bear, The 100M 2025 (36 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) |
| 115099 | reeve | john | M | hampshire | GB | 4 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 101102 | Regan | Kerry | F | UT | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 104341 | Regelson | Dan | M | CO | US | 8 | Wasatch Front 100M 2025 (36 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) † |
| 124481 | Reid | Adam | M | KY | US | 1 | No Business 100M 2025 (34 hours) |
| 123677 | REID | TYSON | M | ON | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 109614 | Reimers | Christian | M | Carinthia | AT | 1 | Western States 100M 2025 (30 hours) † |
| 124272 | Reislöhner | Jan | M | Bavaria | DE | 1 | Zugspitz 106km 2025 (25 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) |
| 124715 | Ren | Xin | F | BC | CA | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 105601 | Renner | Dirk | M | OR | US | 64 | Crazy Mountain 100M 2025 (36 hours) † |
| 100567 | Rescorla | Eric | M | CA | US | 16 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 105537 | Ressl | Robert | M | CA | US | 32 | Waldo 100km 2025 (18 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) |
| 120089 | Rey | Hadrien | M | Haut de Seine | FR | 2 | Grand Raid La Reunion 162km 2025 (50 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) |
| 120689 | Reynolds | William | M | Greater London | GB | 2 | Istria by UTMB 168km 2025 (46 hours) |
| 124790 | Rhea | Nicholas | M | NV | US | 1 | Cuyamaca 100km 2025 (17 hours) † |
| 124337 | Rho | Jannette | F | IL | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 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) † |
| 124638 | Ribeiro de Azevedo | Leonardo | M | RJ | BR | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 115819 | Rice | Chris | M | NY | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 123996 | Rice | Dave | M | Surrey | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 123845 | Rice | Nicole | F | California | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 124238 | Rich | Jon | M | PA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 124132 | Richard | Alexis | M | Quebec | CA | 1 | Ultra-Trail Harricana 125km 2025 (26 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) |
| 115283 | Richardson | Joshua | M | PA | US | 4 | Massanutten 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) † |
| 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) |
| 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) † |
| 104573 | Riedeman | David | M | WI | US | 128 | Moab 238M 2025 (108 hours) † |
| 115508 | Rigaud | Florent | M | QC | CA | 2 | Eastern States 100M 2025 (36 hours) |
| 124133 | Riggs | Robby | M | TN | US | 1 | Tahoe 202M 2025 (100 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) † |
| 110219 | Riley | Thomas | M | Oregon | US | 16 | Waldo 100km 2025 (18 hours) † |
| 124779 | Riou | Simon | M | Bouches du Rhône | FR | 1 | Madeira Island Ultra-Trail 115km 2025 (29 hours) |
| 112201 | Risser | Jon | M | CO | US | 2 | Leadville Trail 100M 2025 (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) |
| 120084 | Rittersdorf | PJ | M | MI | US | 2 | Mohican 100M 2025 (32 hours) |
| 124475 | Rivero | Alejandro | M | São Paulo | BR | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 102639 | Roach | Christopher | M | UT | US | 32 | Wasatch Front 100M 2025 (36 hours) † |
| 115069 | Robbins | Virginia (Ginny) | F | ID | US | 2 | IMTUF 100M 2025 (36 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) † |
| 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) |
| 120255 | Roberts | Iain | M | CA | US | 2 | Siskiyou Out Back 100km 2025 (18 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) † |
| 106453 | Robertson | Alex | M | CO | US | 8 | IMTUF 100M 2025 (36 hours) † |
| 116638 | Robertson | James | M | FL | US | 4 | Hellbender 100M 2025 (40 hours) † |
| 117417 | Robertson | Steven | M | BC | CA | 4 | Canadian Death Race 118km 2025 (24 hours) |
| 121931 | Robinson | Andrew | M | North Lincolnshire | GB | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 124379 | Robinson | Kelsey | F | MI | US | 1 | Sedona Canyons 125M 2025 (52 hours) |
| 113095 | Robinson | Nigel | M | CA | US | 8 | Quicksilver 100km 2025 (17 hours) † |
| 103398 | Roca | Byron | M | GTM | GT | 64 | Bighorn 100M 2025 (35 hours) |
| 111605 | Roche | Chris | M | LA | US | 8 | IMTUF 100M 2025 (36 hours) † |
| 124072 | Rochon | Aryan | M | FL | US | 1 | Wasatch Front 100M 2025 (36 hours) † |
| 124539 | Rodgers | Matthew | M | Colorado | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 124021 | Rodrigues | Alex | M | São Paulo | BR | 1 | Paraty Brazil by UTMB 108km 2025 (26 hours) |
| 121475 | Rodriguez | Miguel | M | CA | US | 2 | Sean O'Brien 100km 2025 (17 hours) † |
| 115860 | Rodriguez Gomez | Javier | M | Barcelona | ES | 2 | Transgrancanaria 125km 2025 (28 hours) |
| 117769 | Roeder | Adam | M | CA | US | 4 | Miwok 100km 2025 (15:30:59 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) † |
| 114388 | Rogers | Joshua | M | TN | US | 2 | Cocodona 250M 2025 (125 hours) |
| 113261 | Rogers | Sara | F | WI | US | 2 | Hennepin 100M 2025 (30 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) |
| 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) |
| 124421 | Rolek | Anastasia | F | CO | US | 1 | Tunnel Hill 100M 2024 (30 hours) † |
| 103300 | Rollins | Laura | F | NC | US | 1 | Western States 100M 2025 (30 hours) † |
| 117529 | Rolls | Ian | M | TX | US | 2 | HOKA Bandera 100km 2025 (17 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) |
| 123894 | Romero | Evan | M | California | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 103236 | Romero | Ted | M | CO | US | 256 | Run Rabbit Run 100M 2025 (36 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) |
| 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) |
| 119674 | ROSA | ALAN | M | CT | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 121090 | Rose | Kate | F | Colorado | US | 2 | High Lonesome 100M 2025 (37 hours) |
| 108901 | Rose | Rebekah | F | UT | US | 16 | Bear, The 100M 2025 (36 hours) |
| 123864 | Rosenberger | Hans | M | Bayern | DE | 1 | Swiss Alps 100M 2025 (50 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) |
| 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) |
| 118469 | Roth | Chris | M | TX | US | 4 | HOKA Bandera 100km 2025 (17 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) |
| 114364 | Rouse | Josh | M | MN | US | 8 | Superior 100M 2025 (38 hours) † |
| 114061 | Rouveyrol | Justine | F | Rhône | FR | 4 | Wildstrubel by UTMB 110km 2025 (27 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) |
| 124291 | Roy | Kevin | M | Alberta | CA | 1 | Canadian Death Race 118km 2025 (24 hours) |
| 124690 | Royse | Dave | M | Surrey | GB | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 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) |
| 117471 | Ruddick | Gemma | F | ACT | AU | 2 | Transjeju by UTMB 107km 2025 (25 hours) |
| 112418 | Ruemker | John | M | NC | US | 2 | Umstead 100M 2025 (30 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) |
| 123939 | Ruiz-Smith | Niall | M | East Sussex | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 102614 | Runions | Neil | M | MN | US | 16 | Bighorn 100M 2025 (35 hours) |
| 123885 | Runz | Tommie | M | MI | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 124123 | Rusch | Patrick | M | WI | US | 1 | Mamba 100M 2024 (34 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) |
| 124703 | Russell | Emory | M | GA | US | 1 | Georgia Death Race 74M 2025 (24 hours) † |
| 116335 | Russo | Christopher | M | IN | US | 2 | Kettle Moraine 100M 2025 (30 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) † |
| 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) † |
| 123876 | Ryan | Ariel | F | MI | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 102054 | Ryan | Emily | F | DC | US | 4 | Hennepin 100M 2025 (30 hours) † |
| 115382 | Ryan | Luke | M | Victoria | AU | 4 | Surf Coast Century 100km 2025 (17 hours) |
| 123097 | Rycroft | Simon | M | North Yorkshire | GB | 2 | Lakeland 100M 2025 (40 hours) |
| 111053 | Ryerson | Holly | F | California | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124284 | Rylyakov | Alexander | M | New York | US | 1 | Vermont 100km 2025 (17 hours) |
| 105427 | Ryoji | Matsui | M | JPN | JP | 16 | TOR330 - Tor de Géants 330km 2025 (132 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) |
| 120298 | Sachdeva | Parvinder | M | Ontario | CA | 2 | Sulphur Springs 100km 2025 (18 hours) |
| 113623 | Saez | Ricky | M | Scotland | GB | 4 | Nice Côte d'Azur by UTMB 159km 2025 (48 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) |
| 123224 | Sakai | Seigo | M | saitama | JP | 2 | Mt Fuji 100M 2025 (46 hours) |
| 104624 | Sakai | Takashi | M | JPN | JP | 32 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 115309 | Saker | Luke | M | ENG | GB | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 121954 | Saliou | Matthieu | M | MONTREAL | CA | 2 | Quebec Mega Trail 135km 2025 (32 hours) |
| 120212 | Salmon | DJ | M | AZ | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 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) |
| 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) |
| 106183 | Sammur | Wael | M | MO | US | 128 | Hennepin 100M 2025 (30 hours) |
| 114082 | Samuelson | Peter | M | CO | US | 4 | High Lonesome 100M 2025 (37 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) † |
| 124164 | Sandoval | Matthew | M | Colorado | US | 1 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 119639 | Sandoval | Simon | M | BC | CA | 2 | Hardrock 100M 2025 (48 hours) |
| 112364 | Sanguanpiyapand | Pylin Jane | F | Bangkok | TH | 8 | TransLantau Ultra Trail by UTMB 100km 2024 (28 hours) |
| 124368 | Santiago | Joseph | M | CO | US | 1 | Never Summer 100km 2025 (23 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) † |
| 124633 | Santos | Adrian | M | TX | US | 1 | Bighorn 100M 2025 (35 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) † |
| 107858 | Santos | Rodrigo | M | Cambridgeshire | GB | 16 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 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) † |
| 103533 | Sasamoto | Wataru | M | JPN | JP | 16 | Angeles Crest 100M 2025 (36 hours) † |
| 122163 | Sato | Etsuko | F | Tokyo | JP | 2 | OSJ Ontake 100km 2025 (20 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) † |
| 124451 | Saukkonen | Mika | M | Helsknki | FI | 1 | TOR100 - Cervino-Monte Bianco 100km 2025 (38 hours) |
| 101458 | Saunders | Steven | M | CHE | CH | 16 | North Downs Way 100M 2025 (30 hours) |
| 111988 | Savanh | Boomer | M | Or | US | 8 | Hood Hundred 100M 2025 (34 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) |
| 114759 | Scala | Holly | F | CA | US | 4 | Sean O'Brien 100km 2025 (17 hours) † |
| 103993 | Scanlan | Jeremy | M | MA | US | 2 | Hellgate 100km 2024 (17 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) |
| 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) |
| 114602 | Schall | Steve | M | PA | US | 8 | C & O Canal 100M 2025 (30 hours) † |
| 100251 | Schasse | Elisa | F | VA | US | 64 | Hennepin 100M 2025 (30 hours) |
| 124436 | Scheer | Ed | M | IL | US | 1 | Never Summer 100km 2025 (23 hours) |
| 107306 | Scheiter | Sebastian | M | California | US | 16 | California Fall Classic at Lake Sonoma 100km 2025 (19 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) |
| 102269 | Schjei | Kathryn | F | CA | US | 32 | Black Canyon 100km 2025 (17 hours) † |
| 119754 | Schleicher | Jan | M | Bayern | DE | 2 | Zugspitz 100M 2025 (48 hours) |
| 100150 | Schluter | Jessica | F | AUS | AU | 4 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 105995 | Schmidgall | Eric | M | OR | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 124266 | Schmidgall | Eric | M | WA | US | 1 | 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) |
| 103252 | Schmitt | Mike | M | MN | US | 2 | Mountain Lakes 100M 2025 (30 hours) † |
| 100178 | Schneekloth | Martin | M | AL | US | 32 | Pine to Palm 100M 2025 (34 hours) † |
| 122461 | Schneider | Simon | M | Aargau | CH | 2 | Wildstrubel by UTMB 110km 2025 (27 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) † |
| 116325 | Schoenhoff | Phillip | M | CA | US | 4 | San Diego 100M 2025 (32 hours) † |
| 115258 | Scholtysik | Sebastian | M | Bavaria | DE | 4 | Zugspitz 106km 2025 (25 hours) |
| 124556 | Schrandt | Lydia | F | TX | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 123595 | Schroder | Brian | M | CO | US | 1 | Desert RATS by UTMB 100km 2025 (20 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) |
| 115695 | Schulman | Chloe | F | Ca | US | 2 | Javelina Jundred 100M 2025 (30 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) † |
| 109691 | Schulz-Nigmann | Lueder | M | Rheinland-Pfalz | DE | 8 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 124758 | Schünke | Kevin | M | Bayern | DE | 1 | Nice Côte d'Azur by UTMB 107km 2025 (28 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) † |
| 108973 | Schwartz | Brian | M | NY | US | 16 | Black Canyon 100km 2025 (17 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) |
| 123815 | Schwoeppe | Tim | M | OH | US | 1 | No Business 100M 2025 (34 hours) |
| 124792 | Scofield | Jeffrey | M | CA | US | 1 | Black Canyon 100km 2025 (17 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) |
| 124493 | Scott | Fergus | N | ME | US | 1 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 114216 | Scott | Peter | M | New South Wales | AU | 8 | Surf Coast Century 100km 2025 (17 hours) |
| 115108 | Scotti | Nicola | M | Italy | IT | 4 | Trail Verbier St Bernard by UTMB 140km 2025 (40 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) |
| 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) |
| 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) |
| 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) † |
| 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) |
| 113519 | Self | David | M | WA | US | 4 | Siskiyou Out Back 100km 2025 (18 hours) † |
| 111777 | Sellers | Stuart | M | Somerset | GB | 4 | Thames Path 100M 2025 (30 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) † |
| 119774 | Serban | Mihai | M | Bucharest | RO | 2 | Canyons by UTMB 100M 2025 (35 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) |
| 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) |
| 119980 | Sevel | Dani | F | VA | US | 2 | Hellgate 100km 2024 (17 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) † |
| 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) |
| 124445 | Shalla | Elyssa | F | UT | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 123942 | Shan | Xin | F | California | US | 1 | Quicksilver 100km 2025 (17 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) |
| 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) † |
| 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) † |
| 124032 | Shearer | John | M | PA | US | 1 | Rim to River 100M 2025 (32 hours) † |
| 107172 | Shearon | Paula | F | North Carolina | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 100116 | Sheehan | William | M | GBR | GB | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 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) † |
| 112074 | Sheng | Huanyuan | M | VA | US | 8 | Hellbender 100M 2025 (40 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) |
| 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) |
| 123871 | Sherman | Micah | M | WA | US | 1 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 121467 | Sherman | Stephen | M | WI | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 121184 | Shetty | Jaya | M | CA | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 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) † |
| 118180 | Shibley | Edward | M | MA | US | 4 | Worlds End 100km 2025 (19 hours) |
| 124592 | Shields | Nicholas | M | CA | US | 1 | San Diego 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) |
| 112898 | Shiotsuki | Kentaro | M | Kanagawa | JP | 8 | Shinetsu Five Mountains Trail 110km 2025 (22 hours) |
| 119975 | Shirley | Harper | F | pennsylvania | US | 2 | Georgia Death Race 74M 2025 (24 hours) † |
| 109556 | Sholley | Jared | M | PA | US | 16 | Worlds End 100km 2025 (19 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) |
| 122237 | SHRONTZ | Jason | M | OR | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 112208 | Shughrue | Chris | M | NY | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 115198 | Shunmugam | Abimanyu | N | Singapore | SG | 2 | Ulju Trail Nine Peaks 128km 2025 (40 hours) |
| 109477 | Shyu | Rosalie | F | Il | US | 8 | Sulphur Springs 100km 2025 (18 hours) |
| 107661 | Sicher | Nathan | M | Missouri | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 112775 | Sidic | Mike | M | BC | CA | 4 | Fat Dog 100km 2025 (24 hours) |
| 118610 | Sieger | Philipp | M | NRW | DE | 4 | Transgrancanaria 125km 2025 (28 hours) |
| 119894 | Simeone | Matt | M | VA | US | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 107219 | Simmons | Ryan | M | CO | US | 16 | Leadville Trail 100M 2025 (30 hours) |
| 124298 | Simon | William | M | France | FR | 1 | Quebec Mega Trail 135km 2025 (32 hours) |
| 114548 | Simpanen | Juuso | M | Uusimaa | FI | 8 | Chianti Ultra Trail by UTMB 120km 2025 (26 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) |
| 111993 | Sinclair | Dylan | N | Arizona | US | 4 | Wasatch Front 100M 2025 (36 hours) † |
| 107141 | Sinetos | Tina | F | CA | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 115833 | Singer | Jill | F | Ohio | US | 4 | Leadville Trail 100M 2025 (30 hours) |
| 123685 | Singh | Amber | F | Or | US | 1 | Waldo 100km 2025 (18 hours) † |
| 110957 | Sio | Aroa | F | Pontevedra | ES | 8 | Black Canyon 100km 2025 (17 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) |
| 100300 | Sisengrath | Greg | M | TX | US | 2 | Cascade Crest 100M 2025 (34 hours) |
| 101435 | Sitzmann | Holly | F | DC | US | 16 | Javelina Jundred 100M 2025 (30 hours) † |
| 123865 | Skelton | Luke | M | TX | US | 1 | Dinosaur Valley 100km 2024 (22 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) |
| 103543 | Skorokhod | Oleksandr | M | UKR | UA | 16 | C & O Canal 100M 2025 (30 hours) † |
| 111757 | Skúlason | Kristján | M | Höfuðborgarsvæðið | IS | 2 | Wildstrubel by UTMB 110km 2025 (27 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) † |
| 101050 | Slate | Kim | F | OR | US | 64 | Cascade Crest 100M 2025 (34 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) |
| 119926 | Slotnick | Scott | M | MI | US | 2 | Hallucination (Run Woodstock) 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) |
| 102889 | Smail | Joseph | M | MD | US | 2 | Indiana 100M 2025 (30 hours) |
| 107527 | Smallcomb | Chris | M | NV | US | 16 | Black Canyon 100km 2025 (17 hours) † |
| 111407 | Smeach | Bryan | M | PA | US | 8 | Laurel Highlands 70.5M 2025 (20 hours) |
| 103156 | Smilor | Kevin | M | CO | US | 16 | Cascade Crest 100M 2025 (34 hours) |
| 112689 | Smith | Chad | M | New York | US | 2 | Twisted Branch 100km 2025 (20 hours) † |
| 107554 | Smith | Chase | M | OH | US | 8 | Twisted Branch 100km 2025 (20 hours) † |
| 102000 | Smith | Darian | M | NC | US | 128 | Hellbender 100M 2025 (40 hours) † |
| 117139 | Smith | Jeremy | M | NC | US | 4 | Umstead 100M 2025 (30 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) † |
| 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) |
| 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) † |
| 122264 | Smith | Wade | M | OR | US | 2 | Oregon Cascades 100M 2025 (32:01:18 hours) |
| 111786 | Smook | Ryan | M | Alberta | CA | 1 | Western States 100M 2025 (30 hours) † |
| 112611 | Smythe | Matt | M | VA | US | 8 | Yeti Virginia 100M 2025 (30 hours) † |
| 113088 | Snowaert | Joseph | M | DC | US | 4 | Long Haul 100M 2025 (30 hours) † |
| 120276 | Snyder | Kabuki | F | California | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 112085 | So | Richard | M | BC | CA | 8 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 124331 | Sobieraj | Magdalena | F | POLASKA | DE | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 hours) |
| 118523 | SOL | Maxime | M | FRANCE | FR | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 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) † |
| 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) † |
| 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) |
| 110502 | Sommerville | Matthew | M | NSW | AU | 2 | Tarawera by UTMB 102km 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) † |
| 100950 | Sorensen | Christian | M | UT | US | 8 | TOR330 - Tor de Géants 330km 2025 (132 hours) |
| 124634 | Soroka | Nathaniel | M | TX | US | 1 | Rocky Raccoon 100M 2025 (30 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) |
| 114744 | Spackman | Amanda | F | NSW | AU | 2 | Tarawera by UTMB 100M 2025 (36 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) † |
| 124513 | Sparks | Casey | M | FL | US | 1 | Long Haul 100M 2025 (30 hours) † |
| 113058 | spaulding | luke | M | alabama | US | 8 | Umstead 100M 2025 (30 hours) |
| 124244 | Speake | Gregory | M | MD | US | 1 | Worlds End 100km 2025 (19 hours) |
| 111960 | Spears | Matt | M | TX | US | 8 | HOKA Bandera 100km 2025 (17 hours) |
| 117845 | Speckman | Heath | M | Colorado | US | 2 | Leadville Trail 100M 2025 (30 hours) |
| 124034 | Speirs | John | M | Ayrshire | GB | 1 | West Highland Way 95M 2025 (30 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) † |
| 114390 | St-Louis | Charles | M | QC | CA | 8 | Fat Dog 120M 2025 (48 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) † |
| 114990 | Stachowski | Timothy | M | TN | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 102292 | Stadelman | Dennis | M | NY | US | 16 | No Business 100M 2025 (34 hours) |
| 123068 | Stafford | Carrie | F | Colorado | US | 2 | Leadville Trail 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) |
| 103326 | Staker | Marcus | M | AUS | AU | 32 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 103261 | Stalnaker | Wendy | F | CO | US | 128 | Leona Divide 100km 2025 (17 hours) |
| 120082 | Standish | Liesl | F | CO | US | 2 | Zion 100M 2025 (36 hours) † |
| 120454 | Stanek | Matthew | M | SC | US | 2 | Hellgate 100km 2024 (17 hours) |
| 123792 | Stanley | Jonathan | M | WA | US | 1 | Gorge Waterfalls 100km 2025 (18 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) |
| 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) † |
| 115625 | Staten | Alex | F | AR | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 118732 | Stear | Matthew | M | Devon | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 115387 | steedman | tom | M | New South Wales | AU | 2 | Guzzler Ultra 100km 2025 (24 hours) |
| 113334 | Steelman | Andrew | M | Illinois | US | 2 | Bear, The 100M 2025 (36 hours) † |
| 124146 | Steenhuis | Peter | M | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) |
| 116838 | Stefanile | Antonio | M | Ontario | CA | 2 | Superior 100M 2025 (38 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) |
| 124733 | Steindl | Martin | M | Salzburg | AT | 1 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 124059 | Steinkellner | Thomas | M | Steiermark | AT | 1 | Mozart by UTMB 119km 2025 (23 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) |
| 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) |
| 124461 | Stephens | Lisa | F | CO | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 100982 | Steurer | Steffen | M | AUT | AT | 32 | Tenerife Bluetrail by UTMB 110 km 2025 (26 hours) |
| 118243 | Stevens | Annette | F | TN | US | 2 | Rim to River 100M 2025 (32 hours) † |
| 124782 | Stewart | Bob | M | PA | US | 1 | Eastern States 100M 2025 (36 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) |
| 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) † |
| 124589 | Stiebling | Max | M | Thuringia | DE | 1 | Julian Alps Trail Run by UTMB 120km 2025 (26 hours) |
| 124006 | Stimpfle | Johannes | M | Bavaria | DE | 1 | Grossglockner UltraTrail 110km 2025 (28 hours) |
| 100383 | Stofko | Paul | M | IN | US | 64 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 100633 | Stokes | Sean | M | CA | US | 8 | Cuyamaca 100km 2025 (17 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) |
| 109521 | Storm | Julieann | F | Ca | US | 2 | Canyons by UTMB 104km 2025 (20 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) † |
| 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) |
| 124043 | Streatfield | Jamie | M | United Kingdom (England) | US | 1 | South Downs Way 100M 2025 (30 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) † |
| 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) |
| 100078 | Strong | Jonathan | M | Leicestershire | GB | 2 | South Downs Way 100M 2025 (30 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) |
| 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) |
| 107460 | Stummvoll | Alexander | M | Baden-Württemberg | DE | 16 | Ultra Tour Monte Rosa 170km 2025 (60 hours) |
| 114943 | SU | SHIQIANG | M | British Columbia | CA | 4 | Black Canyon 100km 2025 (17 hours) † |
| 120762 | Subido | Paco | M | Renfrewshire | GB | 2 | Salomon Cappadocia Ultra-Trail 119km 2025 (23 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) |
| 109995 | Sullivan | Mandy | F | WV | US | 2 | Rim to River 100M 2025 (32 hours) |
| 123580 | Sullivan | Michael | M | CO | US | 1 | High Lonesome 100M 2025 (37 hours) |
| 121343 | Sullivan | Ted | M | CO | US | 2 | Never Summer 100km 2025 (23 hours) |
| 116449 | Sullivan | Tommy | M | Nevada | US | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 112968 | Summers | Bryant | M | OH | US | 4 | Tunnel Hill 100M 2024 (30 hours) † |
| 100911 | Sundermeier | Ronda | F | OR | US | 8 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 109150 | supino | gianluca | M | italy | IT | 8 | Pine to Palm 100M 2025 (34 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) † |
| 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) |
| 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) |
| 111434 | SUZUKI | AKIRA | M | NSW | AU | 8 | Ultra-Trail Australia by UTMB 100M 2025 (42 hours) |
| 119676 | Swade | Judy | F | NC | US | 2 | Yeti Virginia 100M 2025 (30 hours) † |
| 124549 | Swain | Rachel | F | Georgia | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 110137 | Swankaert | Thomas | M | Oost-Vlaanderen | BE | 8 | Nice Côte d'Azur by UTMB 107km 2025 (28 hours) |
| 101735 | Swanson | John | M | NJ | US | 4 | Hennepin 100M 2025 (30 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) † |
| 105982 | Sweeney | Jim | M | NY | US | 16 | Hennepin 100M 2025 (30 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) † |
| 103129 | Syse | Bjorn | M | FL | US | 16 | Cascade Crest 100M 2025 (34 hours) |
| 124355 | Szew | Sophie | F | California | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 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) † |
| 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) |
| 102831 | Takahashi | Nobuya | M | CA | US | 16 | Bigfoot 206M 2025 (100 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) |
| 117285 | Talisesky | Brandon | M | New York | US | 2 | Kettle Moraine 100M 2025 (30 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) |
| 104486 | Tanaka | Hiroyasu | M | JPN | JP | 4 | HURT 100M 2025 (36 hours) † |
| 120064 | Tang | Daolin | M | TX | US | 2 | Canyons by UTMB 100M 2025 (35 hours) |
| 114574 | TANG | YING | F | ILE DE FRANCE | FR | 4 | Scenic Trail 130km 2025 (38 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) |
| 109834 | Tanner | Dylan | M | Colorado | US | 8 | Black Canyon 100km 2025 (17 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) † |
| 124600 | Tate | Derrick | M | England | GB | 1 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 124295 | taussig | Derek | M | KS | US | 1 | Black Canyon 100km 2025 (17 hours) † |
| 112629 | Tavakoli | Renee | F | FL | US | 2 | Burning River 100M 2025 (30 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) |
| 109897 | Taylor | Jack | M | Wrexham | GB | 16 | Trail Andorra by UTMB 105km 2025 (30 hours) |
| 124684 | Taylor | Jennifer | F | NC | US | 1 | Yeti Virginia 100M 2025 (30 hours) † |
| 124082 | Taylor | Mike | N | TN | US | 1 | No Business 100M 2025 (34 hours) |
| 123861 | Teague | Lindsay | F | Georgia | US | 1 | Yeti Virginia 100M 2025 (30 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) |
| 114964 | Tello | Christopher | M | OR | US | 2 | Pine to Palm 100M 2025 (34 hours) † |
| 120695 | Tellwright | Sunny | N | California | US | 2 | Miwok 100km 2025 (15:30:59 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) |
| 123954 | Tennant | Jake | M | UT | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 111437 | Teo | Annie | F | Singapore | SG | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 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) |
| 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) † |
| 103201 | Theodosis | Dennis | M | HKG | HK | 2 | Hong Kong 100K 100km 2025 (23 hours) |
| 120075 | Theofanides | Marissa | F | NY | US | 2 | Grindstone by UTMB 100km 2025 (18 hours) |
| 124716 | Thibault | Roche | M | Haute garonne | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 115997 | Thielmann | Jeremy | M | Alberta | CA | 2 | Canadian Death Race 118km 2025 (24 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) † |
| 105311 | Thomas | Ed | M | SD | US | 4 | Hennepin 100M 2025 (30 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) |
| 117232 | Thomas | Nicole | F | BC | CA | 4 | Desert RATS by UTMB 100km 2025 (20 hours) |
| 120214 | Thompson | Ben | M | SD | US | 2 | Javelina Jundred 100M 2025 (30 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) |
| 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) † |
| 124457 | Thompson | Kyle | M | Oregon | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) |
| 117680 | thomson | barbara | F | CA | US | 4 | Javelina Jundred 100M 2025 (30 hours) † |
| 122263 | Thomson | Mark | M | Kent | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 114974 | Thomson | Nicholas | M | Oregon | US | 4 | Oregon Cascades 100M 2025 (32:01:18 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) |
| 120369 | Thorne | Jedediah | M | California | US | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 111608 | Thornton | Colin | M | Rauma | NO | 4 | Hardrock 100M 2025 (48 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) |
| 104869 | Tidd | John | M | Madrid | ES | 2 | Hardrock 100M 2025 (48 hours) † |
| 102433 | Tiedens | Mark (George) | M | CA | US | 512 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 100187 | Tiemann | Max | M | NC | US | 64 | Hellbender 100M 2025 (40 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) |
| 105334 | Timme | Ryan | M | UT | US | 32 | Beaverhead 100km 2025 (20 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) † |
| 112685 | Tischler | Jen | F | IA | US | 8 | Zion 100km 2025 (19 hours) |
| 119978 | Tixier | Jean-Christophe | M | Ile de France | FR | 2 | Nice Côte d'Azur by UTMB 159km 2025 (48 hours) |
| 124345 | Tneh | Wah Ching | M | Selangor | MY | 1 | Scott TMBT 109km 2025 (30 hours) |
| 102276 | Todd | Kenneth | M | NC | US | 32 | Hennepin 100M 2025 (30 hours) † |
| 120363 | Tolsma | Maria | F | New Jersey | US | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 116790 | Tomchaney | Michael | M | Arizona | US | 4 | Cuyamaca 100km 2025 (17 hours) |
| 123856 | Tomilov | Viktor | M | Novosibirsk Oblast | RU | 1 | Ultra-Trail Cape Town 100km 2024 (21 hours) |
| 107749 | Tomlinson | Sam | M | London | GB | 16 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 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) |
| 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) |
| 107855 | Torkelson | Cory | M | TX | US | 8 | Leadville Trail 100M 2025 (30 hours) |
| 118430 | Torres | Xavier | M | Barcelona | ES | 4 | Val d’Aran by UTMB, Camins de Hèr 110km 2025 (26 hours) |
| 111726 | TOUTAIN | Patrick | M | SAONE ET LOIRE | FR | 2 | Endurance Trail des Templiers 105km 2025 (19 hours) |
| 116117 | Townsend | Ben | M | CA | US | 4 | Cuyamaca 100km 2025 (17 hours) † |
| 124126 | Tramutola | Jared | M | NJ | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 116188 | Tran | Hien | F | Vietnam | VN | 2 | Eiger Ultra Trail 250km 2025 (90 hours) |
| 124467 | Tran | Timothee | M | CA | US | 1 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 121249 | TRAVELLA | Eric | M | Bourgogne | FR | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 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) |
| 124124 | Treignier | Jerome | M | QC | CA | 1 | Black Canyon 100km 2025 (17 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) |
| 101722 | Trent | Katie | F | NV | US | 16 | Wasatch Front 100M 2025 (36 hours) † |
| 124226 | Trepin | Nicolas Alberto | M | Córdoba | AR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 115793 | Trexler | Brad | M | Oh | US | 2 | Dinosaur Valley 100km 2024 (22 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) † |
| 102888 | Trinh | Linda | F | ON | CA | 128 | Sulphur Springs 100km 2025 (18 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) |
| 121649 | Trobrillant | Ruddy | M | VAL DE MARNE | FR | 2 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 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) |
| 112191 | Truccone | Giorgio | M | Torino | IT | 4 | TDS (Sur les Traces des Ducs de Savoie) 147km 2025 (44:10 hours) |
| 104933 | True | Wahsatch | M | UT | US | 16 | Wasatch Front 100M 2025 (36 hours) |
| 124172 | Truett | Colman | M | MA | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 120903 | Tse | Chit Ming | F | Somerset | GB | 2 | South Downs Way 100M 2025 (30 hours) |
| 124739 | TSUBAKI | KENICHI | M | AZ | US | 1 | FunTrails Chichibu & Okumusashi 105km 2024 (30 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) |
| 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) |
| 104170 | Tunney | Phillip | M | GBR | GB | 4 | South Downs Way 100M 2025 (30 hours) |
| 114571 | Turgeon | Dany | M | Quebec | CA | 8 | Quebec Mega Trail 135km 2025 (32 hours) |
| 103224 | Turley | Richard | M | CA | US | 16 | Canyons by UTMB 104km 2025 (20 hours) |
| 123572 | Turner | Camille | F | UT | US | 1 | Zion 100km 2025 (19 hours) |
| 115690 | Turner | Jessica | F | AZ | US | 4 | Black Canyon 100km 2025 (17 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) |
| 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) |
| 101619 | Tweed | Geoffrey | M | NM | US | 128 | San Diego 100M 2025 (32 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) † |
| 123405 | uehara | koji | M | Fukuoka | JP | 1 | Shinetsu Five Mountains Trail 100M 2025 (33 hours) |
| 124110 | Uehira | Shin | M | Tokyo | JP | 1 | Mt Fuji 100M 2025 (46 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) |
| 117962 | Ulmer | Ben | M | Ms | US | 4 | Arkansas Traveler 100M 2025 (30 hours) |
| 102865 | Ulrich | Lindsey | F | OR | US | 64 | Canyons by UTMB 100M 2025 (35 hours) |
| 111439 | ULSNES | Steinar | M | Norway | NO | 2 | Thames Path 100M 2025 (30 hours) |
| 116101 | Underhill | Noah | M | IN | US | 4 | Indiana 100M 2025 (30 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) |
| 120294 | Ureña | Nicholas | M | Fl | US | 2 | No Business 100M 2025 (34 hours) |
| 103204 | Urken | Steven | M | GA | US | 16 | Hennepin 100M 2025 (30 hours) † |
| 115207 | Utsunomiya | Hitoshi | M | Tokyo | JP | 4 | Mt Fuji 100M 2025 (46 hours) |
| 122678 | Vail | Tim | M | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 121625 | Vainauskas | Julius | M | MA | US | 2 | Puerto Vallarta by UTMB 147km 2024 (35 hours) |
| 111510 | Vale | Pete | M | Worcestershire | GB | 8 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 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) |
| 114582 | Valle | Fabrizio | M | Torino | IT | 4 | Morenic Trail 119km 2025 (22 hours) |
| 111748 | Valone | Frank | M | CA | US | 8 | Canyons by UTMB 100M 2025 (35 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) |
| 124096 | Van De Pette | Rob | M | CA | US | 1 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) |
| 123991 | Van Den Broucke | Rémi | M | Hauts de Seine | FR | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 103462 | Van Der Groen | Dez | N | CA | US | 64 | Mountain Lakes 100M 2025 (30 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) |
| 124670 | Van Pelt | Samuel | M | WA | US | 1 | Hood Hundred 100M 2025 (34 hours) |
| 105431 | Van Praag | Nick | M | GBR | GB | 4 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 107093 | Van Roekel | Cody | M | California | US | 4 | Cuyamaca 100km 2025 (17 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) |
| 113640 | Van Winkle | Michael | M | Ohio | US | 8 | Twisted Branch 100km 2025 (20 hours) † |
| 120421 | VanArsdale | Cheyne | M | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 117327 | vanblommestein | Christian | M | ID | US | 4 | Canyons by UTMB 100M 2025 (35 hours) |
| 117695 | Vandermeulen | Jo | F | Pembrokeshire | GB | 2 | Ultra-Trail Snowdonia by UTMB 100km 2025 (28 hours) |
| 112681 | Vangalur | Manivannan | M | Kentucky | US | 4 | Kettle Moraine 100M 2025 (30 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) † |
| 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) |
| 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) |
| 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) |
| 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) † |
| 101418 | Vazquez Ramirez | Sergio | M | MEX | MX | 32 | Courmayeur Champex Chamonix (CCC) 100km 2025 (25 hours) |
| 116421 | Vegesana | Venu | M | NC | US | 2 | Umstead 100M 2025 (30 hours) |
| 122439 | Veloza | Jose Paulo | M | Western Cape | ZA | 1 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 120930 | Verbracken | Jason | M | California | US | 2 | Bigfoot 206M 2025 (100 hours) † |
| 121428 | Verdyan | Alex | M | Israel | IL | 2 | Canyons by UTMB 104km 2025 (20 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) |
| 120524 | Verley | Matthew | M | SC | US | 2 | Sulphur Springs 100M 2025 (30 hours) |
| 115125 | Vermaak | Thomas | M | Western Cape | ZA | 4 | Ultra Trail Drakensberg 163km 2025 (48 hours) |
| 115128 | Vetsch | Christian | M | Arizona | US | 4 | Black Canyon 100km 2025 (17 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) |
| 121908 | Vignes | Régis | M | Geneva | CH | 2 | Wildstrubel by UTMB 110km 2025 (27 hours) |
| 109985 | Vilchis | Charline | F | CA | US | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 124170 | Villarino | Daniel | M | NC | US | 1 | Leadville Trail 100M 2025 (30 hours) |
| 116307 | Vince | Mercedes | F | BC | CA | 4 | Gorge Waterfalls 100km 2025 (18 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) |
| 117435 | Vining | Roanna | F | Hawkes Bay | NZ | 4 | Taupo 100km 2025 (17 hours) |
| 122198 | Visser | Matthijs | M | noord holland | NL | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 124566 | Vitkov | Victor | M | CO | US | 1 | Bighorn 100M 2025 (35 hours) |
| 122652 | Vivas | Javier | M | Lima | PE | 2 | Kodiak Ultra Marathons by UTMB 100km 2025 (19 hours) |
| 122291 | VO THI THANH | NGA | F | Viet Nam | VN | 2 | Canyons by UTMB 104km 2025 (20 hours) |
| 103032 | Vogel | Matthew | M | OH | US | 4 | Vermont 100km 2025 (17 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) † |
| 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) |
| 106180 | Vora | Neel | M | CA | US | 8 | Javelina Jundred 100M 2025 (30 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) |
| 124112 | Voyles | Brian | M | CA | US | 1 | Waldo 100km 2025 (18 hours) † |
| 107472 | Vuletic | Kelly | F | OR | US | 8 | Waldo 100km 2025 (18 hours) † |
| 115033 | Vyrvich | Andrey | M | CA | US | 4 | Tahoe 202M 2025 (100 hours) † |
| 106639 | Vystejn | Jiri | M | CZE | CZ | 32 | Krakonosova Stovka 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) † |
| 113443 | Wagenaar | Rutger | M | Friesland | NL | 8 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 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) |
| 122269 | Wain | Chantz | M | PA | US | 2 | Rim to River 100M 2025 (32 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) † |
| 119277 | Wakefield | Nikolas | M | Hampshire | GB | 2 | Eastern States 100M 2025 (36 hours) |
| 118703 | Waldorff | Erik | M | Ohio | US | 2 | Okushinano 100km 2025 (21 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) |
| 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) |
| 106666 | Walker | Rebecca | F | CO | US | 16 | Dinosaur Valley 100M 2024 (35 hours) † |
| 124386 | Wall | Henry | M | ON | CA | 1 | Sulphur Springs 100km 2025 (18 hours) |
| 122201 | Wallace | David | M | AZ | US | 2 | IMTUF 100M 2025 (36 hours) † |
| 106522 | Wallace | Sarah | F | PA | US | 16 | Rim to River 100M 2025 (32 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) † |
| 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) † |
| 113056 | Walter | Emily | F | Colorado | US | 4 | High Lonesome 100M 2025 (37 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) † |
| 103281 | Wang | Gary | M | CA | US | 4 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 123997 | WANG | JINGYI | M | GUANGDONG | CN | 1 | Lake Biwa 100M 2025 (52 hours) |
| 117930 | Wang | Michael | M | New Jersey | US | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 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) |
| 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) |
| 124092 | Ward | Dolan | M | ID | US | 1 | HURT 100M 2025 (36 hours) † |
| 120698 | Ward | Marc | M | West Midlands | GB | 2 | Ultra-Trail Snowdonia by UTMB 165km 2025 (48 hours) |
| 124217 | Ward | Mary | F | Colorado | US | 1 | Miwok 100km 2025 (15:30:59 hours) |
| 115717 | Ward | Mindy | F | Iowa | US | 4 | Hennepin 100M 2025 (30 hours) |
| 124233 | Ward | TJ | M | NJ | US | 1 | Cocodona 250M 2025 (125 hours) |
| 122609 | Ward Temple | Jessica | F | BC | CA | 2 | Fat Dog 120M 2025 (48 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) |
| 124093 | Ware | Patrick | M | AZ | US | 1 | Black Canyon 100km 2025 (17 hours) |
| 114039 | Warfel | Heidi | F | CO | US | 8 | High Lonesome 100M 2025 (37 hours) |
| 102358 | Warner | Brant | M | GA | US | 2 | Javelina Jundred 100M 2025 (30 hours) † |
| 109590 | Warner | Nathan | M | Arizona | US | 8 | Javelina Jundred 100M 2025 (30 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) † |
| 107103 | Warunchaichana | Wittaya | M | Nonthaburi | TH | 8 | Pong Yaeng Trail 100km 2025 (31 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) |
| 118083 | Waters | Eric | M | California | US | 2 | California Fall Classic at Lake Sonoma 100km 2025 (19 hours) † |
| 100549 | Watkins | Aaron | M | Pa | US | 32 | Rim to River 100M 2025 (32 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) † |
| 115981 | Watson | Jimmy | M | NV | US | 4 | Miwok 100km 2025 (15:30:59 hours) |
| 101343 | Watson | Lauren | F | NV | US | 4 | Cascade Crest 100M 2025 (34 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) |
| 118690 | Weaver | Brad | M | SC | US | 4 | Georgia Death Race 74M 2025 (24 hours) † |
| 115211 | Weaver | Tom | M | England | GB | 4 | Autumn 100M 2025 (28 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) |
| 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) † |
| 109243 | Weeter | Bryce | M | North Carolina | US | 16 | Long Haul 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) † |
| 102721 | Weibel | Amber | F | CA | US | 1 | Western States 100M 2025 (30 hours) † |
| 101717 | Weidman | William | M | VA | US | 32 | Hellbender 100M 2025 (40 hours) † |
| 114846 | Weingärtner | Michael | M | Bayern | DE | 4 | Zugspitz 100M 2025 (48 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) |
| 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) |
| 120394 | Welsch | Shane | M | TX | US | 2 | Black Canyon 100km 2025 (17 hours) † |
| 112202 | Weng | Timothy | M | TX | US | 8 | Bear, The 100M 2025 (36 hours) † |
| 112975 | WENGER | SARAH | F | Pa | US | 4 | Eastern States 100M 2025 (36 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) † |
| 123562 | Werwein | Alexander | M | Hessen | DE | 1 | Zugspitz 106km 2025 (25 hours) |
| 114626 | Wessells | Alyson | F | MI | US | 2 | Hallucination (Run Woodstock) 100M 2025 (30 hours) |
| 117028 | Westmeyer | Laura | F | OR | US | 4 | Waldo 100km 2025 (18 hours) † |
| 101601 | Wetzel | Evan | M | WI | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 104263 | Wheat | Alan | M | AUS | AU | 8 | North Downs Way 100M 2025 (30 hours) |
| 124332 | Wheeler | Bradley | M | Tennessee | US | 1 | No Business 100M 2025 (34 hours) |
| 123937 | Whitaker | Joshua | M | Victoria | AU | 1 | Buffalo Stampede 100km 2025 (23 hours) |
| 120004 | White | Alex | M | WI | US | 2 | Hennepin 100M 2025 (30 hours) † |
| 124390 | White | Andrew | M | North Carolina | US | 1 | Umstead 100M 2025 (30 hours) |
| 100185 | White | James | M | GBR | GB | 32 | Eiger Ultra Trail 250km 2025 (90 hours) |
| 100765 | White | Keith | M | NV | US | 4 | Canyons by UTMB 104km 2025 (20 hours) |
| 109970 | White | Robert | M | Ca | US | 16 | Sean O'Brien 100km 2025 (17 hours) † |
| 111244 | Whiteside | Hoyle | M | Virginia | US | 8 | No Business 100M 2025 (34 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) |
| 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) † |
| 100212 | Whyman | Matt | M | GBR | GB | 8 | Autumn 100M 2025 (28 hours) |
| 105583 | Wickless | Andrew | M | CO | US | 8 | Never Summer 100km 2025 (23 hours) |
| 123948 | Wiggins | Ross | M | Derbyshire | GB | 1 | Swiss Alps 100M 2025 (50 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) |
| 123897 | Wilhelm | Brandon | M | MD | US | 1 | Laurel Highlands 70.5M 2025 (20 hours) |
| 120535 | Wilken | Marian | M | BY | DE | 2 | Ultra-Trail Cape Town 100km 2024 (21 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) |
| 114863 | Williams | Ashley | M | QLD | AU | 4 | Guzzler Ultra 100km 2025 (24 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) † |
| 123643 | Williams | Eric | M | California | US | 1 | IMTUF 100M 2025 (36 hours) † |
| 124382 | Williams | Jesse | M | AZ | US | 1 | Javelina Jundred 100M 2025 (30 hours) † |
| 124561 | Williams | John | M | Oregon | 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) † |
| 108958 | Williams | Shane | M | UT | US | 4 | Wasatch Front 100M 2025 (36 hours) † |
| 109503 | Williams | Shane | M | HI | US | 2 | HURT 100M 2025 (36 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) |
| 116202 | Wills | Fred | M | CT | US | 4 | Twisted Branch 100km 2025 (20 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) |
| 124449 | Wilsey | Jay | M | CA | US | 1 | Waldo 100km 2025 (18 hours) † |
| 106127 | Wilson | Amanda | F | NC | US | 16 | Long Haul 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) † |
| 119666 | Wilson | Eva (aka Ewa) | F | NSW | AU | 2 | Tarawera by UTMB 102km 2025 (17 hours) |
| 120150 | Wilson | Jessica | F | ON | CA | 2 | Arc of Attrition by UTMB 100M 2025 (36 hours) |
| 124308 | Wilson | Travis | M | IL | US | 1 | Hennepin 100M 2025 (30 hours) † |
| 105289 | Wilson | Zac | M | Tennessee | US | 128 | Cruel Jewel 106M 2025 (48 hours) |
| 114260 | Wims | Zachary | M | California | US | 4 | HOKA Bandera 100km 2025 (17 hours) |
| 101589 | Wind | Andy | M | VA | US | 32 | 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) |
| 102822 | Winkler | Simone Angela | F | CA | US | 8 | Siskiyou Out Back 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) † |
| 107674 | Winter | Rebekah | F | NV | US | 2 | Beaverhead 100km 2025 (20 hours) |
| 102448 | Witko | Ryan | M | NY | US | 8 | Indiana 100M 2025 (30 hours) |
| 123971 | Wittenauer | Steffen | M | Bern | CH | 1 | Lake Zuri 100 Endurance Run 106km 2025 (18 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) |
| 100672 | Wolf | Chad | M | OH | US | 16 | Twisted Branch 100km 2025 (20 hours) † |
| 115770 | Wolfer | Kody | M | NY | US | 4 | Eastern States 100M 2025 (36 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) |
| 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) † |
| 121849 | Wong | Hanson | M | Victoria | AU | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 116997 | Wong | Roberta | F | Hong Kong | HK | 2 | TransLantau Ultra Trail by UTMB 100km 2024 (28 hours) |
| 111342 | Woo | April | F | KY | US | 4 | Brazos Bend 100M 2024 (32 hours) |
| 101115 | Wood | Derek | M | FL | US | 32 | Bighorn 100M 2025 (35 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) † |
| 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) † |
| 119760 | Woodman | Nicolas | M | Provence-Alpes-Côte d'Azur | FR | 2 | Lavaredo Ultra Trail by UTMB 120km 2025 (26 hours) |
| 106001 | Woolley | Tim | M | WY | US | 16 | Bear, The 100M 2025 (36 hours) † |
| 100451 | Wooten | Mark | M | TX | US | 128 | Dinosaur Valley 100M 2024 (35 hours) † |
| 123962 | Worcester | Joseph | M | CA | US | 1 | Hong Kong 100K 100km 2025 (23 hours) |
| 117292 | Wright | Adam | M | BW | DE | 4 | Les Coursières des Hauts du Lyonnais 111km 2025 (20 hours) |
| 124511 | Wright | Chris | M | OR | US | 1 | Canyons by UTMB 104km 2025 (20 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) |
| 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) |
| 105099 | Wrightson | Rachel | F | CA | US | 64 | Umstead 100M 2025 (30 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) |
| 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) † |
| 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) |
| 124060 | Wunschel | Luca | M | BW | DE | 1 | Canyons by UTMB 104km 2025 (20 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) |
| 108222 | Wyatt | Jake | M | CO | US | 16 | Bighorn 100M 2025 (35 hours) |
| 123208 | Wynn | JT | N | WY | US | 2 | Beaverhead 100km 2025 (20 hours) |
| 120067 | xie | liansheng | M | guangdong | CN | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 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) |
| 101974 | Yadav | Kunal | M | GBR | GB | 8 | Autumn 100M 2025 (28 hours) |
| 120734 | Yakovlev | Dmitry | M | NY | US | 2 | Moab 238M 2025 (108 hours) |
| 111216 | YAMAZAKI | KOJI | M | OSAKA-prefecture | JP | 8 | Mt Fuji 100M 2025 (46 hours) |
| 106247 | Yanagihashi | Shizuka | M | JPN | JP | 16 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 121922 | Yane | Walker | M | MO | US | 2 | HOKA Bandera 100km 2025 (17 hours) |
| 103515 | Yang | Fuchyi | M | CA | US | 32 | Bear, The 100M 2025 (36 hours) † |
| 123920 | Yang | Lei | M | ON | CA | 1 | Sulphur Springs 100M 2025 (30 hours) |
| 113319 | Yang | Mei | F | CA | US | 8 | Black Canyon 100km 2025 (17 hours) † |
| 105668 | Yanuck | Justin | M | CA | US | 256 | Javelina Jundred 100M 2025 (30 hours) † |
| 120156 | Yao | Tuduo | M | NRW | DE | 2 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 hours) |
| 123963 | Yardley | Lewis | M | Staffordshire | GB | 1 | South Downs Way 100M 2025 (30 hours) |
| 120230 | Yatsynych | Andriy | M | Ontario | CA | 2 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 122413 | Yawichai | Prayoon | M | Bangkok | TH | 2 | Pong Yaeng Trail 100km 2025 (31 hours) |
| 124301 | Yeaman | Jennifer | F | CO | US | 1 | Run Rabbit Run 100M 2025 (36 hours) † |
| 124303 | Yeary | Sam | M | Indiana | US | 1 | Zion 100km 2025 (19 hours) |
| 124223 | Yi | Junxiao | M | New Jersey | US | 1 | Grindstone by UTMB 100km 2025 (18 hours) |
| 119849 | Yliniemi | Laurie | F | Minnesota | US | 2 | Kettle Moraine 100M 2025 (30 hours) † |
| 115197 | Yoon | Seawon | M | Auckland | NZ | 2 | Tarawera by UTMB 100M 2025 (36 hours) |
| 123318 | Yoshikawa | Hiroki | M | Fukuoka | JP | 2 | Shinetsu Five Mountains Trail 110km 2025 (22 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) |
| 113796 | Young | Matthew | M | WV | US | 4 | Rim to River 100M 2025 (32 hours) † |
| 109167 | Young | Phil | M | Iowa | US | 16 | Tunnel Hill 100M 2024 (30 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) † |
| 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) |
| 123000 | Zahrly | Daniel | M | Tennessee | US | 1 | Mamba 100M 2024 (34 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) |
| 109013 | Zamzow | Ben | M | MI | US | 8 | Vermont 100km 2025 (17 hours) |
| 115223 | Zanovello | Giulia | F | Varese | IT | 2 | TOR330 - Tor de Géants 330km 2025 (132 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) |
| 108171 | Zavatchan | John | M | PA | US | 4 | Eastern States 100M 2025 (36 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) † |
| 107677 | Zehetleitner | Christoph | M | Bavaria | DE | 2 | Zugspitz 106km 2025 (25 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) † |
| 118767 | Zgrabik | Andrew | M | OH | US | 2 | Canal Corridor 100M 2025 (30 hours) † |
| 117014 | Zhang | Qiang | M | CA | US | 2 | Quicksilver 100km 2025 (17 hours) † |
| 117230 | Zhang | Shuyang | M | Shandong | CN | 4 | Mount Yun by UTMB - UMY 159.6km 2025 (48 hours) |
| 123711 | Zhang | Yanbo | M | MA | US | 1 | Vermont 100M 2025 (30 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) |
| 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) |
| 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) |
| 116494 | Zhu | Tong | M | CA | US | 4 | Kodiak Ultra Marathons by UTMB 100M 2025 (36 hours) |
| 107393 | Ziegenmeyer | Logan | M | California | US | 16 | Quicksilver 100km 2025 (17 hours) † |
| 115820 | Ziemainz | Rene | M | Brandenburg | DE | 4 | Trail Alsace Grand Est by UTMB - Ultra-Trail des Païens 109km 2025 (21 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) |
| 123641 | Zinani | Juan Pablo | M | Buenos Aires | AR | 1 | Patagonia 100M 2025 (42 hours) |
| 124388 | Zou | Xiaodong | F | WA | US | 1 | Gorge Waterfalls 100km 2025 (18 hours) † |
| 118381 | Zuech | Kevin | M | NJ | US | 2 | Burning River 100M 2025 (30 hours) |
| 122131 | Zupan | Primoz | M | Slovenia | SI | 2 | Ultra-Trail Du Mont-Blanc (UTMB) 100M 2025 (46:45 hours) |
| 123493 | テラダ | 次郎 | M | 島仁 | JP | 1 | Aso Volcano Trail 115km 2025 (28 hours) |
† - Qualifier matched by published results and entrants lottery email.
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