2021 Biggest ultra running races

By finisher count. North American races only.
Finishers Event Winner
208

Western States 100

Jun 26 / 100 Miles / Olympic Valley CA
204

Never Summer 100K

Jul 31 / 100 KM / Gould CO
204

Pilot Mountain to Hanging Rock Ultra

Oct 02 / 50 KM / Pinnacle NC
202

Mel Williams Memorial Seashore (Seashore Nature Trail)

Dec 18 / 50 KM / Virginia Beach VA
201

Skyline 50K

Aug 01 / 50 KM / San Leandro CA
200

StumpJump 50K

Oct 02 / 50 KM / Chattanooga TN
200

Crown King Scramble

Mar 27 / 50 KM / Phoenix AZ
199

The Bear 100

Sep 24 / 100 Miles / Logan UT
199

Burning River

Jul 24 / 50 Miles / Cuyahoga Falls OH
197

Black Mountain 50k

Jun 19 / 50 KM / San Diego CA
197

Eastern Divide

Jun 19 / 50 KM / Pembroke VA
193

Marquette Trail 50

Aug 21 / 50 KM / Marquette MI
192

Dallas 50K

Dec 12 / 50 KM / Dallas TX
192

Javelina Jundred

Oct 30 / 100 KM / Fountain Hills AZ
192

Terrapin Mountain

Mar 20 / 50 KM / Big Island VA
190

Sinister 7 Ultra

Jul 10 / 50 Miles / Crowsnest Pass AB
189

Wy'east Trailfest (Wy'east Howl)

Jul 31 / 50 KM / Government Camp OR
186

Yeti 100 Mile Endurance Run

Sep 24 / 100 Miles / Abingdon VA
186

Eagle Up Ultra

Jun 05 / 50 KM / Canal Fulton OH
186

Squamish 50

Oct 17 / 50 Miles / Squamish BC
185

Strolling Jim™

May 01 / 40 Miles / Wartrace TN
183

Labor Pain

Sep 05 / 12 Hours / Reading PA
182

Siskiyou Out Back

Jul 10 / 50 KM / Ashland OR
181

San Juan Solstice

Jun 26 / 50 Miles / Lake City CO
180

Wy'east Wonder

Jun 12 / 50 KM / Parkdale OR
180

Wy'east Wonder

Jun 12 / 50 Miles / Parkdale OR
180

Mohican

Jun 19 / 50 Miles / Loudonville OH
178

Ragged 75 Stage Race and 50k

Aug 08 / 50 KM / Danbury NH
178

Run Rabbit Run

Sep 17 / 100 Miles / Steamboat Springs CO
178

Bighorn

Jun 19 / 100 Miles / Dayton WY
177

Georgia Sky to Summit

Nov 13 / 50 KM / Dillard GA
177

Volcanic 50

Aug 07 / 50 KM / Cougar WA
176

The Barkley Fall Classic

Sep 18 / 50 KM / Wartburg TN
176

Backcountry Rise Trail Run

Jul 17 / 50 KM / Toutle WA
175

North Fork 50 Mile/50K

Jun 05 / 50 KM / Pine CO
170

Burning River

Jul 24 / 100 Miles / Cuyahoga Falls OH
169

Boulder Field 100

Sep 11 / 50 KM / Jim Thorpe PA
168

Moab 240

Oct 08 / 238 Miles / Moab UT
168

Catamount Ultra

Jun 26 / 50 KM / Stowe VT
168

Crested Butte Ultra

Oct 02 / 55 KM / Crested Butte CO
166

Quest for the Crest

May 15 / 50 KM / Burnsville NC
165

Wasatch 100

Sep 10 / 100 Miles / Kaysville UT
165

Table Rock Ultras

Sep 18 / 50 KM / Morganton NC
165

Beaverhead Endurance Runs

Jul 10 / 55 KM / Salmon ID
165

Badger Mountain Challenge

Mar 26 / 50 Miles / Richland WA
165

Ultra-Trail Harricana™ of Canada (UTHC)

Sep 11 / 50 Miles / La Malbaie QC
164

Virginia Run for Cancer

Apr 24 / 24 Hours / Hampton VA
164

McDowell Mountain Frenzy

Dec 04 / 50 KM / Fountain Hills AZ
163

Zion Ultras and Trail Half Marathon

Apr 10 / 100 Miles / Virgin UT
163

Crooked Road 24 Hour Ultra

Nov 20 / 24 Hours / Rocky Mt VA

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