2017 - 2018 Colorado Ultramarathon Calendar

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

56 races

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

April 14, 2018 Race day in 5 months
USA / Mountain Region / Colorado / Fruita
Ultramarathon
Desert Trail Hilly

Greenland Trail 50k

May 05, 2018 Race day in 5 months
USA / Mountain Region / Colorado / Larkspur
Ultramarathon
Trail Fast

North Fork 50 Mile/50K Trail Race

June 02, 2018 Race day in 6 months
USA / Mountain Region / Colorado / Pine Valley Ranch Park, Pine
Ultramarathon
Trail Mountain

North Fork 50 Mile/50K Trail Race

June 02, 2018 Race day in 6 months
USA / Mountain Region / Colorado / Pine Valley Ranch Park, Pine
Ultramarathon
Trail Mountain

Run Rabbit Run 50 & 100 Mile UltraMarathons

September 14, 2018 Race day in 10 months
USA / Mountain Region / Colorado / Steamboat Springs
Ultramarathon
Trail Mountain Steamboat Springs Running Series UTMB Qualifier Western States Qualifier

Mountain RATS

September 22, 2018 Race day in 10 months
USA / Mountain Region / Colorado / Eagle
Ultramarathon
Trail Mountain

Telluride Mountain Run

August 13, 2016 The race has already taken place.
USA / Mountain Region / Colorado / Telluride
Ultramarathon

Continental Divide Trail Run

August 27, 2016 The race has already taken place.
USA / Mountain Region / Colorado / Steamboat Springs
Ultramarathon
Trail Steamboat Springs Running Series

D'Evelyn DASH 5K/2K run/walk and carnival

August 27, 2016 The race has already taken place.
USA / Mountain Region / Colorado / Denver
Ultramarathon
Fun Urban Trail Fund raising

Hideaway Hundred

September 03, 2016 The race has already taken place.
USA / Mountain Region / Colorado / Winter Park
Ultramarathon
Trail Mountain

Hideaway Hundred

September 03, 2016 The race has already taken place.
USA / Mountain Region / Colorado / Winter Park
Ultramarathon
Trail Mountain

Hideaway Hundred

September 03, 2016 The race has already taken place.
USA / Mountain Region / Colorado / Winter Park
Ultramarathon
Trail Mountain
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