RunEmu

Marathon Races in Colorado

Browse 114+ upcoming marathon races in Colorado.

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Run Through Time Marathon

Mar 14, 2026
Salida, CO
26.2M13.1M2M
51°
21°
2%

21st Annual Run Through Time Trail Marathon and Half Marathon

Mar 14, 2026
Salida, CO
26.2M13.1M2M
51°
21°
2%

The City Park Circuit

Mar 28, 2026
Denver, CO
400M2M
62°
32°
5%

The City Park Circuit, Presented by New Balance

Mar 28, 2026
Denver, CO
400M2M
62°
32°
5%

RMRR Spring Marathon Training Series #1

Mar 29, 2026
Thornton, CO
40M20M10M
64°
33°
6%

Run the Ranch

Apr 11, 2026
Loveland, CO
12HR12HR6HR4HR
63°
30°
8%

Boulder Track Series Meet 1

Apr 12, 2026
Longmont, CO
1500M800M2M
63°
34°
11%

Donot Stop Half Marathon (5k/10k) - Colorado Springs

Apr 18, 2026
Colorado Springs, CO
50M6.2M3.1M1M
61°
34°
5%

Rattler Trail Race

Apr 18, 2026
Colorado Springs, CO
31.1M15.5M10K5K
61°
34°
5%

DoNot Stop Half Marathon (5k/10k) - Denver

Apr 19, 2026
Littleton, CO
50M6.2M3.1M1M
61°
33°
10%

Runs With Scissors Races

Apr 25, 2026
Brighton, CO
31.1M26.2M13.1M
63°
35°
9%

Cheyenne Mountain Trail Race

Apr 25, 2026
Colorado Springs, CO
31.1M15.5M7M4M
62°
35°
6%

Royal Gorge Groove

Apr 25, 2026
Cañon City, CO
31.1M18.6M12.4M7.8M5K
65°
35°
7%

Greenland Trail Races

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

Collegiate Peaks Trail Run

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

The Colorado Marathon

May 3, 2026
Fort Collins, CO
26.2M13.1M10K5K
65°
39°
11%

Frank Shorter Track Classic

May 3, 2026
Longmont, CO
5000M800M1M
65°
38°
14%

Colorado Marathon

May 3, 2026
Fort Collins, CO
26.2M13.1M10K5K
65°
39°
11%

Hometown Half Marathon & 5k/10k - Colorado Springs

May 9, 2026
Colorado Springs, CO
50M13.1M6.2M3.1M5K1M
67°
40°
8%

Quad Rock 25 & 50 Mile Trail Races

May 9, 2026
Bellvue, CO
50M25M
67°
41°
11%
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