Upcoming 10Ks in Colorado

Endurance Grid lists one hundred nine 10Ks in Colorado, from September 2026 to August 2027 across 33 cities.

109
Races
33
Cities
13
Sports

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Running races in Colorado

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Frequently Asked Questions

How many 10Ks are in Colorado?
Endurance Grid's Race Calendar lists 109 upcoming 10Ks in Colorado, in 33 cities, from September 2026 to August 2027.
How long is a 10K?
A 10K is a running race where athletes run 6.2 miles long (10 kilometers) for time.
Which Colorado cities host 10Ks?
10Ks in Colorado are held in Centennial, Colorado Springs, Denver, Westminster, Arvada, Littleton, Golden, Louisville, Windsor, and Breckenridge, plus 23 other cities.
What other race distances are available in Colorado?
Beyond 10K, Colorado races cover a wide range of distances. Colorado also has 5Ks, half marathons, and marathons for running races. Additionally, Endurance Grid's Race Calendar also covers other sports, with adventure, road cycling, duathlon, gravel, mountain bike, paddle, rucking, running, swimming, swimrun, trail running, triathlon, and ultra races of various distances.