Biggest Ultrarunning Races By finisher count. North American races only.

Date Event Distance Finishers Winner (M) Winner (F)
03/03 Way Too Cool
Cool CA
50 KM 601 Max King Ladia Albertson-Junkans
06/23 Rachel Carson Trail Challenge
Pittsburgh PA
34 Miles 444 Luke Badaczewski Christine Edmiston
05/05 The North Face Endurance Challenge New York
New York NY
50 KM 437 Jesse Bruce Sarah Bergeron-Larouche
03/17 Chuckanut 50k
Fairhaven WA
50 KM 410 Cole Watson Keely Henninger
07/08 Silver Rush 50
Leadville CO
50 Miles 400 Joshua Eberly Abby Mitchell
04/07 American River
Folsom CA
50 Miles 382 Zachary Ornelas Emily Hawgood
06/02 Golden Gate Dirty 30
Black Hawk CO
50 KM 355 Jackson Brill Madeline Mckeever
02/17 Black Canyon Trail
Mayer AZ
100 KM 353 Tim Freriks Ailsa Macdonald
07/28 Minnesota Voyageur
Carlton MN
50 Miles 346 Benjamin Cogger Lila Planavsky
03/24 HAT Trail Run
Havre de Grace MD
50 KM 337 Michael Bailey Dana Kolesar
04/28 The North Face Endurance Challenge Washington DC
Washington DC DC
50 KM 331 Charlie Epperson Ayshalynn Perez
02/25 Cowtown Ultra
Fort Worth TX
50 KM 326 Geofrey Terer Jenna Mutz
05/12 Ice Age Trail
La Grange WI
50 Miles 325 Jeff Friedman Jessa Hackman
01/27 Mountain Mist
Huntsville AL
50 KM 317 David Riddle Jacqueline Merritt
06/23 Western States
Squaw Valley CA
100 Miles 299 Jim Walmsley Courtney Dauwalter
08/11 Howl at the Moon 8 Hour
Danville IL
8 Hours 296 Joey Miller Randi Lucas
06/02 Squaw Peak 50 Mile Trail Run
Provo UT
50 Miles 292 Kyle Barrett Leah Yingling
04/14 Lake Sonoma
Healdsburg CA
50 Miles 292 Jim Walmsley Keely Henninger
05/05 Miwok
Stinson Beach CA
100 KM 287 Franz van der Groen Megan Arauzo
04/20 Zion 100
Virgin UT
50 KM 279 Levi Hawks Johanna Torgesen
04/28 The Canyons
Foresthill CA
100 KM 278 Lon Freeman Corrine Malcolm
07/21 Vermont 100
West Windsor VT
100 Miles 277 Jason Lantz Lindsay Simpson
04/28 Promise Land
Lynchburg VA
50 KM 272 Brian Rusiecki Amy Rusiecki
05/05 The North Face Endurance Challenge New York
New York NY
50 Miles 268 Mathieu Blanchard Sarah Verguet Moniz
04/21 Hyner Trail Challenge
Hyner PA
50 KM 268 Wesley Atkinson Jenny Rodgers
07/28 Never Summer 100K
Gould CO
100 KM 264 Mark Marzen Addie Bracy
05/19 Superior Spring Trail Race
Lutsen MN
50 KM 264 Benjamin Cogger Michelle Pratt
06/15 Bighorn
Dayton WY
32 Miles 255 Neil Long Kira Donnelly
07/07 Afton Trail
Hastings MN
50 KM 252 Justin Grunewald Eve Rukavina-Rembleski
01/06 Bandera
Bandera TX
100 KM 248 Mario Mendoza Camille Herron
05/19 Sun Mountain
Winthrop WA
50 KM 244 Jeremy Wolf Ladia Albertson-Junkans
05/19 Jemez Mountain
Los Alamos NM
50 KM 243 Michael Bienkowski Kathryn Ross
05/27 GiddyUp Trail Running Festival at Pineland Farms
New Gloucester ME
50 KM 240 Ethan Nedeau Julia Huffman
06/16 Broken Arrow Skyrace
Squaw Valley CA
50 KM 235 Jimmy Elam Megan Kimmel
02/24 Antelope Canyon Ultras
Page AZ
55 KM 234 Timothy Martin Luanne Park
04/07 Bull Run Run
Clifton VA
50 Miles 233 Paul Jacobs Anna Piskorska
08/04 Volcanic 50
Cougar WA
50 KM 232 John Lehman Cassi Knight
04/28 Virginia Run for Cancer
Hampton VA
24 Hours 231 Bryan Wilson Christina Sumner
04/07 Yamacraw
Stearns KY
50 KM 230 Thomas Morgan Justyna Mudy-Mader
03/10 Marin Ultra Challenge
Sausalito CA
50 KM 226 Jeff Mogavero Jenny Comiskey
07/07 Dirty Dozen 6/12 Hour Race
Pinole CA
6 Hours 226 Michael Bower Kelly Coogan-Gehr
07/21 Speedgoat
Snowbird Resort UT
50 KM 223 David Sinclair Ruth Croft
04/14 Leona Divide
Lake Hughes CA
50 KM 220 Timothy Reed Christine Shaw
02/24 Salmon Falls 50K
Pilot Hill CA
50 KM 220 Greg Bricca Jennifer Pfeifer
01/06 Bandera
Bandera TX
50 KM 219 Ford Smith Kelly Swanson
07/28 White River 50
Crystal Mountain WA
50 Miles 216 Damien Humbert Kim Magnus
02/24 Antelope Canyon Ultras
Page AZ
50 Miles 212 Michael John McKnight Alexandra Garner
02/17 Moab Red Hot 55k/33k
Moab UT
55 KM 211 Anthony Costales Cat Bradley
05/12 Smith Rock Ascent
Terrebonne OR
50 KM 211 Jesse Lang Maria Dalzot
07/14 Knee Knackering North Shore Trail Run
North Vancouver BC
30 Miles 210 Mike Sidic Darbykai Standrick

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