2017 - 2018 Colorado Ultramarathon Calendar

Browse our Ultramarathon Calendar for races organized in Colorado among 56 races.

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56 races

Desert R.A.T.S. Trail Running Festival

50K
April 15, 2017 Race day in 18 days
USA / Mountain Region / Colorado / Fruita
Ultramarathon - 50 kilometers
Hilly Desert Trail

Rattler Trail Races

Rattler Trail Races 50K
April 15, 2017 Race day in 18 days
USA / Mountain Region / Colorado / Colorado Springs
Ultramarathon - 50 kilometers
Trail

C.U.R.E Ultra's

100K
April 29, 2017 Race day in about 1 month
USA / Mountain Region / Colorado / Chatfield State Park, Littleton
Ultramarathon - 100 kilometers
Trail

C.U.R.E Ultra's

50K
April 29, 2017 Race day in about 1 month
USA / Mountain Region / Colorado / Chatfield State Park, Littleton
Ultramarathon - 50 kilometers
Trail

C.U.R.E Ultra's

50 Mile
April 29, 2017 Race day in about 1 month
USA / Mountain Region / Colorado / Chatfield State Park, Littleton
Ultramarathon - 50 miles
Trail

Greenland Trail 50k

Greenland Trail 50k
May 06, 2017 Race day in about 1 month
USA / Mountain Region / Colorado / Larkspur
Ultramarathon - 50 kilometers
Trail Fast

Quad Rock 50

Quad Rock 50
May 13, 2017 To be confirmed Race day in about 2 months
USA / Mountain Region / Colorado / Fort Collins
Ultramarathon - 50 miles
Trail

Ultimate Direction Dirty 30

50K
June 03, 2017 Race day in 2 months
USA / Mountain Region / Colorado / Golden Gate Canyon State Park
Ultramarathon - 50 kilometers
Charity Trail Mountain

North Fork 50 Mile/50K Trail Race

50K Trail Race
June 03, 2017 Race day in 2 months
USA / Mountain Region / Colorado / Pine Valley Ranch Park, Pine
Ultramarathon - 50 kilometers
Trail Mountain

North Fork 50 Mile/50K Trail Race

50 Mile Trail Race
June 03, 2017 Race day in 2 months
USA / Mountain Region / Colorado / Pine Valley Ranch Park, Pine
Ultramarathon - 50 miles
Trail Mountain

South Park Trail Marathon and Half

South Park Trail Marathon
June 10, 2017 Race day in 2 months
USA / Mountain Region / Colorado / Fairplay
Ultramarathon - 28 miles
Trail

San Juan Solstice 50 Mile Run

June 24, 2017 Race day in 3 months
USA / Mountain Region / Colorado / Lake City
Ultramarathon - 50 miles
Trail Mountain

Leadville Silver Rush 50

July 09, 2017 Race day in 3 months
USA / Mountain Region / Colorado / Leadville
Ultramarathon - 50 miles
Trail Mountain

Hardrock 100 Endurance Run

July 14, 2017 Race day in 4 months
USA / Mountain Region / Colorado / Silverton
Ultramarathon - 100 miles
UTMB Qualifier Trail Mountain

High Lonesome 100

July 28, 2017 Race day in 4 months
USA / Mountain Region / Colorado / Salida
Ultramarathon - 100 miles