10K races in Colorado, United States — 2026 running calendar

Jul

04

Ourayce 10K Fun Run

Ouray, Colorado, United States

Running

10K

Jul

04

Run for Chocolate 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

Running

5K 10K Half-Marathon 1.6K +2

Jun

27

SBT TRL

Steamboat Springs, Colorado, United States

Running

10K 5K

Jun

21

Strawberry Shortcut

Glenwood Springs, Colorado, United States

Running

10K 5K 1.6K

Jun

21

Father's Day Classic 10k, 5k, & 1 Mile

Arvada, Colorado, United States

Running

10K 5K 1.6K +2

Jun

20

Sloth Run 5K/10K/13.1 Denver/Aurora

Centennial, Colorado, United States

Running

5K 10K Half-Marathon 1.6K +8

Jun

20

Run Juneteenth Day 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

Running

5K 10K Half-Marathon 1.6K +2

Jun

14

Garden of the Gods 10 Mile/10K and Trail Run

Colorado Springs, Colorado, United States

Running Trail running

16.1K 10K 4.7K

Jun

14

The Bullfrog Splashdown

Littleton, Colorado, United States

Running

10K 5K 2.4K 8.9K

Jun

07

DU Dash Colorado

Palmer Lake, Colorado, United States

Running

5K 10K

Jun

06

Run for Breast Cancer 5K/10K/13.1 Denver/Aurora

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

Jun

06

SuperHeroes Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

Running

5K 10K Half-Marathon 1.6K +2