Race Calendar in Colorado, United States

Spirit of the Valley 5k

Grand Junction, Colorado, United States

12 Sep, 2026 (Sat)

$10.00 - $35.00

Running

5K 1K

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 Denver 5k

Denver, Colorado, United States

12 Sep, 2026 (Sat)

$44.85

Running

5K

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

Steele Trap Trail Run

Loma, Colorado, United States

12 Sep, 2026 (Sat)

$50.00

Running

Marathon

For The City Network 5K

Greeley, Colorado, United States

12 Sep, 2026 (Sat)

$45.00

Running

5K

6 Dot Dash

Littleton, Colorado, United States

12 Sep, 2026 (Sat)

$40.00

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

9/11 Heroes Run - Denver, Colorado

Denver, Colorado, United States

13 Sep, 2026 (Sun)

Free - $40.00

Running

5K 1.6K +3

Buffalo Bicycle Classic

Boulder, Colorado, United States

13 Sep, 2026 (Sun)

$125.00 - $200.00

Cycling, Gravel biking

Ultra 22.5K +5