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Races in Colorado - May 2026

Browse 102+ upcoming races in Colorado for May 2026.

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Races in Colorado - May 2026

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Friends of the National Center Science Stride 5K

May 1, 2026
Boulder, CO
3.1M
64°
37°
14%

Colorado Brewery Running Series

May 2, 2026
Arvada, CO
5K
64°
37°
11%

CollaBEERation 5K

May 2, 2026
Longmont, CO
5K
65°
37°
14%

High Line Canal 5K/10K Run

May 2, 2026
Centennial, CO
6.2M3.1M
62°
37°
8%

Cinco De Mayo Run 5K/10K/13.1 DENVER/AURORA

May 2, 2026
Centennial, CO
13.1M10K5K1M
62°
37°
8%

Aspen parkrun

May 2, 2026
Aspen, CO
5K
54°
30°
13%

CollaBEERation 5k & Brew Fest Party

May 2, 2026
Longmont, CO
3.1M
65°
37°
14%

Adams County Foster Care 5K

May 2, 2026
Brighton, CO
5K1M
65°
37°
10%

Collegiate Peaks Trail Run

May 2, 2026
Buena Vista, CO
50M25M
60°
31°
5%

Duck Waddle 5K

May 2, 2026
Estes Park, CO
5K
54°
29°
13%

Hope House 5K and Fun Run

May 2, 2026
Arvada, CO
5K1M
64°
37°
11%

9th edition CollaBEERation 5k & Brew Fest Party

May 2, 2026
Longmont, CO
3.1M
65°
37°
14%

18 Hours of Fruita

May 2, 2026
Loma, CO
7.3M
70°
42°
4%

Girls on the Run 5K

May 2, 2026
Fruita, CO
5K
70°
42°
4%

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

May 2, 2026
Centennial, CO
13.1M10K5K1M
62°
37°
8%

Adams County Foster Care 5K Run/Walk and 1 mile fun run

May 2, 2026
Brighton, CO
5K1M
65°
37°
10%

Greenland Trail Races

May 2, 2026
Larkspur, CO
31.1M15.5M8M4M
62°
36°
10%

Nielson Two Mile Challenge

May 2, 2026
Colorado Springs, CO
2M
64°
38°
7%

South Boulder Creek parkrun

May 2, 2026
Boulder, CO
5K
65°
37°
14%

Walk Run or Roll for Daniel

May 2, 2026
Colorado Springs, CO
5K
64°
38°
7%
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