2025 Biggest ultra running races

By finisher count. North American races only.
Finishers Event Winner
776

Black Canyon Ultras

Feb 08 / 100 KM / Mayer AZ
623

Chuckanut 50k

Mar 15 / 50 KM / Fairhaven WA
601

Canyons Endurance Runs

Apr 25 / 50 KM / Auburn CA
572

Silver Rush 50

Jul 12 / 50 Miles / Leadville CO
527

Black Canyon Ultras

Feb 09 / 50 KM / Mayer AZ
526

Canyons Endurance Runs

Apr 25 / 100 KM / Auburn CA
457

Quebec Mega Trail

Jul 05 / 52 KM / Beaupré QC
457

Antelope Canyon Ultras

Mar 08 / 50 KM / Page AZ
432

Diez Vista

Apr 12 / 50 KM / Port Moody BC
426

Mountain Mist

Jan 25 / 50 KM / Huntsville AL
423

Rachel Carson Trail Challenge

Jun 21 / 37.5 Miles / Pittsburgh PA
386

Avalon Benefit 50

Jan 11 / 50 KM / Avalon CA
385

Desert Rats Trail Running Festival

Apr 12 / 50 KM / Fruita CO
316

Sulphur Springs Trail Race

May 24 / 50 KM / Ancaster ON
315

Gorge Waterfalls

Apr 13 / 50 KM / Cascade Locks OR
310

Gorge Waterfalls

Apr 12 / 100 KM / Cascade Locks OR
308

Quebec Mega Trail

Jul 05 / 50 Miles / Beaupré QC
301

Avalon Benefit 50

Jan 11 / 50 Miles / Avalon CA
299

Promise Land

Apr 26 / 50 KM / Lynchburg VA
298

Hyner Trail Challenge

Apr 19 / 50 KM / Hyner PA
295

Beaverhead Endurance Runs

Jul 12 / 55 KM / Salmon ID
285

Western States 100

Jun 28 / 100 Miles / Olympic Valley CA
269

The Country Mile

Apr 04 / 48 Hours / Slater-Marietta SC
268

Rocky Raccoon

Feb 01 / 100 Miles / Huntsville TX
260

Crown King Scramble

Mar 22 / 50 KM / Phoenix AZ
260

Miwok

May 03 / 100 KM / Stinson Beach CA
258

Way Too Cool

Mar 01 / 50 KM / Cool CA
255

Cowtown Ultra

Feb 23 / 50 KM / Fort Worth TX
233

Salmon Falls 50K

Feb 22 / 50 KM / Pilot Hill CA
232

Bandera

Jan 11 / 100 KM / Bandera TX
232

Wild Horse Traverse

May 03 / 52 KM / Kelowna BC
231

Marin Ultra Challenge

Mar 08 / 50 KM / Sausalito CA
230

HAT Trail Run

Mar 22 / 50 KM / Havre de Grace MD
230

Mt Cheaha

Feb 22 / 50 KM / Delta AL
228

Afton Trail

Jul 05 / 50 KM / Hastings MN
228

The Algonquin 50K

Feb 08 / 50 KM / Pocomoke City MD
226

Sulphur Springs Trail Race

May 24 / 100 KM / Ancaster ON
226

Superior Spring Trail Race

May 17 / 50 KM / Lutsen MN
225

The Big Alta

Mar 22 / 50 KM / Marinwood CA
224

Cabin Fever 50K

Feb 15 / 50 KM / New River Gorge National Park WV
218

San Juan Solstice

Jun 21 / 50 Miles / Lake City CO
213

Bighorn

Jun 21 / 32 Miles / Dayton WY
209

McKenzie River Trail Run

Jun 07 / 50 KM / Blue River OR
208

Bighorn

Jun 21 / 100 Miles / Dayton WY
207

Dam Yeti 50

Jun 07 / 55 KM / Damascus VA
207

Ice Age Trail

May 10 / 50 KM / La Grange WI
201

Rock the Ridge

May 03 / 50 Miles / New Paltz NY
199

Zion Ultras and Trail Half Marathon

Apr 12 / 60 KM / Virgin UT
199

Arizona Monster 300

Apr 04 / 300 Miles / Superior AZ
199

Arches Ultra

Jan 25 / 50 KM / Moab UT

The results database is the property of UltraRunning Magazine. Use of the information and data is allowed and encouraged, however when it is shared or published attribution is required, as follows: Source UltraRunning Magazine (and if online, a link to UltraRunning.com).

Recent Results

Siskiyou Out Back
Ashland, OR - 312 finishers
100 KM | 50 KM
Knee Knackering North Shore Trail Run
North Vancouver, BC - 177 finishers
30 Miles
Hardrock 100 Endurance Run
Silverton, CO - 114 finishers
100 Miles
Sombrero Sizzler
jacksonville, FL - 28 finishers
12 Hours | 12 Hours | 9 Hours | 9 Hours | 6 Hours
Beaverhead Endurance Runs
Salmon, ID - 396 finishers
100 KM | 55 KM
Silverheels Trail Runs
Fairplay, CO - 79 finishers
100 Miles | 100 KM | 50 Miles | 60 KM
McCall Trailrunning Classic
McCall, ID - 35 finishers
50 KM
Silver Rush 50
Leadville, CO - 572 finishers
50 Miles
Honey Badger 100
Kingman, KS - 8 finishers
100 Miles
Dirty Burg
Belmont, MI - 17 finishers
50 KM
View All Results