Upcoming 10Ks in Colorado

Endurance Grid lists one hundred 10Ks in Colorado, from October 2026 to October 2027 across 27 cities.

100
Races
27
Cities
12
Sports

Running races in Colorado

Your next race is out there. Go find it.

All Colorado Running Races

Frequently Asked Questions

How many 10Ks are in Colorado?
Endurance Grid's Race Calendar lists 100 upcoming 10Ks in Colorado, in 27 cities, from October 2026 to October 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, Golden, Louisville, Windsor, Alamosa, and Alma, plus 17 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, HYROX, mountain bike, paddle, rucking, running, trail running, triathlon, and ultra races of various distances.