Race Calendar in Colorado, United States

53rd Annual Imogene Pass Run

Telluride, Colorado, United States

12 Sep, 2026 (Sat)

$130.00

Trail running

27.5K

Black Squirrel Half Marathon

Bellvue, Colorado, United States

12 Sep, 2026 (Sat)

$100.00

Running

Half-Marathon

6 Dot Dash

Littleton, Colorado, United States

12 Sep, 2026 (Sat)

$40.00

Running

5K

Trail Sisters Women's Half Marathon & 10k

Buena Vista, Colorado, United States

12 Sep, 2026 (Sat)

$65.00 - $100.00

Trail running

Half-Marathon 10K

The Gunni Grinder

Gunnison, Colorado, United States

12 Sep, 2026 (Sat)

$70.00 - $130.00

Gravel biking

Ultra 48.3K

For The City Network 5K

Greeley, Colorado, United States

12 Sep, 2026 (Sat)

$45.00

Running

5K

Jungle Dash

Loveland, Colorado, United States

12 Sep, 2026 (Sat)

$5.00 - $15.00

Running

1.6K Mini's Jungle Dash

2026 Lake Nighthorse Triathlon - Sprint and Olympic

Durango, Colorado, United States

12 Sep, 2026 (Sat)

$95.00 - $140.00

Triathlon

25.8K Ultra +1

National Chocolate Day: Run for Chocolates 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

12 Sep, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Honey Bee Hustle

Loveland, Colorado, United States

13 Sep, 2026 (Sun)

RMRR September Trophy Series

Thornton, Colorado, United States

13 Sep, 2026 (Sun)

$10.00

Running

10K 5K

Colorado Run for the Fallen Run/Walk/Ruck

Palmer Lake, Colorado, United States

13 Sep, 2026 (Sun)