Colorado ultramarathons
Ultramarathons in Colorado
23 upcoming ultramarathons in Colorado listed by date, with cities, start times, and entry fees. Find a ultramarathon near you and register.
23
upcoming races
1
cities with 3+
6:56:26
typical finish
October 2026
November 2026
December 2026
from $60
RegisterFebruary 2027
March 2027
from $205
RegisterApril 2027
from $75
RegisterMay 2027
June 2027
from $35
Register
from $60
RegisterRace in the Clouds - Alma Dirt Festival 2027
Alma, Colorado1:30 PM startTrail
from Free
RegisterJuly 2027
August 2027
from $80
RegisterUltramarathon results in Colorado
From 7 ultramarathons with official results in the last two years, 688 finishers in all.
6:56:26
typical finish
13:24 /mi
typical pace
97
finishers in a typical race
6:58:10
women, typical finish
6:54:01
men, typical finish
under 5:28:53
the fastest tenth
Entry for upcoming ultramarathons in Colorado usually runs from $90 to $145, with a typical fee of $110 before processing fees.
Typical times are the middle finisher across these races, weighted by field size. School meets, stair climbs, and results with timing errors are left out.
Fastest 50Ks in Colorado
- 1Greenland Trail RacesLarkspur · median 5:55:41 · 97 finishers in 2026
- 2Continental Divide Trail RunSteamboat Springs · median 6:56:12 · 145 finishers in 2026
- 3Rattler Trail RaceColorado Springs · median 6:56:26 · 80 finishers in 2026
- 4Audi Power of Four Trail RunAspen · median 8:56:48 · 121 finishers in 2026
- 5Pikes Peak UltraColorado Springs · median 9:15:09 · 137 finishers in 2026
Biggest ultramarathons in Colorado
- 1Quad Rock 25 & 50 Mile Trail RacesBellvue · 270 finishers in 2026
- 2The Grand TraverseCrested Butte · 239 finishers in 2026
- 3Never Summer 100km & 60kmWalden · 237 finishers in 2026
- 4Crested Butte UltraCrested Butte · 187 finishers in 2025
- 5Continental Divide Trail RunSteamboat Springs · 145 finishers in 2026
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