50 Mile Races in Colorado
As of October 22, 2026, Crewable lists 4 upcoming 50 mile races in Colorado from November 2026 to September 2027. The next is Kessel Run Ultra on November 7 in Fruita. Registration is open for 1.
Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites
Race calendar
November 2026
1 raceMay 2027
1 raceJuly 2027
1 raceSeptember 2027
1 raceQuick answers
What is the next 50 mile race in Colorado?
Kessel Run Ultra, on Saturday, November 7, 2026, in Fruita. Distances: 50 mi, 40 mi, 50K.
How many 50 mile races in Colorado have open registration?
1 of the 4 list registration as open as of October 22, 2026, including Kessel Run Ultra.
What is the busiest month for 50 mile races in Colorado?
November 2026, with 1 of the 4. May 2027 follows with 1.
Cities in Colorado
Neighboring states
More ways to browse
Race planning
Plan your Colorado race
Aid stations, cutoffs and pacing in one free plan. Crew invites and race-day updates come with a Race Pass.
Plan a race free