2017 - 2018 Colorado Ultramarathon Calendar

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

56 races

Mountain RATS

September 23, 2017 Race day in 2 days
USA / Mountain Region / Colorado / Eagle
Ultramarathon
Trail Mountain

The Bear Chase Race

September 30, 2017 Race day in 9 days
USA / Mountain Region / Colorado / Lakewook
Ultramarathon
Trail Fast

The Bear Chase Race

September 30, 2017 Race day in 9 days
USA / Mountain Region / Colorado / Lakewook
Ultramarathon
Trail Fast

The Bear Chase Race

September 30, 2017 Race day in 9 days
USA / Mountain Region / Colorado / Lakewook
Ultramarathon
Trail Fast

Castle Rock Trail Festival

October 07, 2017 Race day in 16 days
USA / Mountain Region / Colorado / Castle Rock
Ultramarathon
Trail

Bobcat Trail Race

October 22, 2017 Race day in about 1 month
USA / Mountain Region / Colorado / Palmer Park, Colorado Springs
Ultramarathon

Greenland Trail 50k

May 05, 2018 Race day in 8 months
USA / Mountain Region / Colorado / Larkspur
Ultramarathon
Trail Fast

North Fork 50 Mile/50K Trail Race

June 02, 2018 Race day in 8 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 8 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 12 months
USA / Mountain Region / Colorado / Steamboat Springs
Ultramarathon
Trail Mountain Steamboat Springs Running Series UTMB Qualifier Western States Qualifier

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
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