RunEmu

Half Marathon Races in Colorado (Page 3)

Browse 129+ upcoming half marathon races in Colorado.

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Erie Half and 5K

Aug 16, 2026
Erie, CO
13.1M5K
90°
58°
5%

Erie Half & 5k

Aug 16, 2026
Erie, CO
13.1M5K
90°
58°
5%

Byers Peak Stampede Half Marathon & 5K Run

Aug 22, 2026
Fraser, CO
13.1M3M
66°
40°
9%

Staunton Rocks! Marathon and Half Marathon

Aug 22, 2026
Pine, CO
26.2M13.1M
77°
42°
8%

Arrowhead Half Marathon and 5K

Aug 22, 2026
Vail, CO
13.1M5K
73°
36°
8%

Byers Peak Stampede

Aug 22, 2026
Fraser, CO
13.1M5K
66°
40°
9%

Staunton Rocks! Marathon and Half

Aug 22, 2026
Pine, CO
26.2M13.1M
77°
42°
8%

Pioneer Prairie Dog Half Marathon, 10k and 5k

Aug 23, 2026
Westminster, CO
13.1M10K5K
90°
57°
5%

Pioneer Prairie Dog Half, 10k & 5k

Aug 23, 2026
Westminster, CO
13.1M10K5K
90°
57°
5%

Prairie Dog Half and 10K/5K

Aug 23, 2026
Westminster, CO
13.1M10K5K
90°
57°
5%

Continental Divide Trail Run

Aug 29, 2026
Steamboat Springs, CO
31.1M16M5M
82°
46°
6%

Rock Hawk

Aug 29, 2026
Castle Rock, CO
31.1M15.5M10K5K
83°
53°
6%

TBK Bank Thirsty 13 Half Marathon

Aug 29, 2026
Durango, CO
13.1M
83°
48°
5%

Run to Breast Cancer 5K/10K/13.1 DENVER/AURORA

Aug 29, 2026
Centennial, CO
13.1M10K5K1M
85°
56°
5%

Rock Hawk Trail Races

Aug 29, 2026
Castle Rock, CO
31.1M15.5M10K5K
83°
53°
6%

Thirsty 13 Half Marathon

Aug 29, 2026
Durango, CO
13.1M
83°
48°
5%

RMRR Fall Marathon Training Series

Aug 30, 2026
Thornton, CO
20M10M
89°
55°
4%

Creede Mountain Run

Sep 5, 2026
Loveland, CO
31.1M22M12M2M
84°
49°
4%

Golden Harvest Half Marathon & 5k/10k - Denver

Sep 5, 2026
Denver, CO
50M13.1M6.2M3.1M1M
86°
54°
5%

Golden Harvest Half Marathon & 5k/10k - Colorado Springs

Sep 6, 2026
Colorado Springs, CO
50M13.1M6.2M3.1M1M
82°
54°
6%
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