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Half Marathon Races in Colorado (Page 4)

Browse 129+ upcoming half marathon races in Colorado.

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Labor Day Half Marathon

Sep 7, 2026
Parker, CO
13.1M10K5K
82°
53°
6%

Trail Sisters Women's Half Marathon & 10k

Sep 12, 2026
Buena Vista, CO
13.1M10K
77°
42°
5%

Black Squirrel Half Marathon

Sep 12, 2026
Bellvue, CO
13.1M
81°
50°
4%

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

Sep 12, 2026
Centennial, CO
13.1M10K5K1M
80°
52°
6%

Trail Sisters Women's Half Marathon

Sep 12, 2026
Buena Vista, CO
13.1M10K
77°
42°
5%

American Heroes Run

Sep 12, 2026
Longmont, CO
9HR6HR13.1M9.1M
82°
51°
7%

Ned Ned Run

Sep 12, 2026
Nederland, CO
13.1M10K5K
62°
36°
8%

Nun Run

Sep 13, 2026
Denver, CO
13.1M5K
83°
51°
5%

Ouray Mountain Trail Run

Sep 19, 2026
Ouray, CO
13M
70°
44°
9%

Pikes Peak Ascent

Sep 19, 2026
Manitou Springs, CO
13.32M
64°
36°
7%

Autumn Run

Sep 19, 2026
Buena Vista, CO
13.1M10K5K
74°
40°
4%

All-Out Fall Fest

Sep 19, 2026
Westminster, CO
13.1M10K
81°
48°
5%

Run the Rockies Half Marathon

Sep 19, 2026
Frisco, CO
13.1M10K
66°
30°
5%

Fall Equinox Marathon

Sep 20, 2026
Fort Collins, CO
26.2M13.1M
77°
47°
5%

Fall Equinox

Sep 20, 2026
Fort Collins, CO
13.1M5M
77°
47°
5%

Deep Creek Trail Half Marathon

Sep 26, 2026
Telluride, CO
1/2 Marathon
67°
41°
9%

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

Sep 26, 2026
Centennial, CO
13.1M10K5K1M
73°
45°
6%

WILD Wahatoya Runs

Sep 26, 2026
La Veta, CO
31.1M13.1M8M
76°
45°
4%

Red Feather Trail Jamboree

Sep 27, 2026
Red Feather Lakes, CO
13.1M
64°
35°
5%

Sangre de Cristo Trail Festival

Sep 27, 2026
Westcliffe, CO
16.8M8M
69°
35°
2%
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