2017 - 2018 Colorado Ultramarathon Calendar

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

56 races

Never Summer 100km

July 22, 2017 Race day in 1 day
USA / Mountain Region / Colorado / Gould
Ultramarathon
Trail

High Lonesome 100

July 28, 2017 Race day in 7 days
USA / Mountain Region / Colorado / Salida
Ultramarathon

Grand Mesa 100

July 29, 2017 Race day in 8 days
USA / Mountain Region / Colorado / Grand Mesa
Ultramarathon
Trail Hilly

Grand Mesa 100

July 29, 2017 Race day in 8 days
USA / Mountain Region / Colorado / Grand Mesa
Ultramarathon
Trail

Grand Mesa 100

July 29, 2017 Race day in 8 days
USA / Mountain Region / Colorado / Grand Mesa
Ultramarathon
Trail

Pike Peak Ultra

July 29, 2017 Race day in 8 days
USA / Mountain Region / Colorado / Colorado Springs
Ultramarathon
Trail Mountain

Ouray 100 Mile Endurance Run

August 04, 2017 Race day in 14 days
USA / Mountain Region / Colorado / Ouray
Ultramarathon
Ever Run Racing Trail Mountain

Wild West Relay

August 04, 2017 Race day in 14 days
USA / Mountain Region / Colorado / Fort Collins
Ultramarathon
Road Running RLT Relay Races Relay

Ouray 100 Mile Endurance Run

August 05, 2017 Race day in 15 days
USA / Mountain Region / Colorado / Ouray
Ultramarathon
Ever Run Racing Trail Mountain

Silverheels 100 Mile Endurance Run

August 05, 2017 Race day in 15 days
USA / Mountain Region / Colorado / Fairplay
Ultramarathon
Trail Mountain

Leadville Trail 100 Run

August 19, 2017 Race day in 29 days
USA / Mountain Region / Colorado / Leadville
Ultramarathon
Trail Leadville Race Series Mountain UTMB Qualifier Western States Qualifier

Silverton Alpine Marathon

August 19, 2017 Race day in 29 days
USA / Mountain Region / Colorado / Silverton
Ultramarathon
Trail Aravaipa Running Mountain
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