Half Marathon Races in Colorado
Find upcoming half marathon races in Colorado — with dates, locations, and direct registration links.
58 upcoming half marathon races found in Colorado
Upcoming Half Marathon Races in Colorado
Elevation Challenge (14-hr)6-Mile
Summits Trail Runs
Jun 6, 2026
Granby, CO
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Half Marathon
Basalt Half Marathon
Jun 6, 2026
Basalt, CO
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Half Marathon5K
Colorado Brewery Running Series – Breckenridge Half Marathon and 5K
Jun 7, 2026
Littleton, CO
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MarathonHalf Marathon
The Steamboat Marathon
Jun 7, 2026
Steamboat Springs, CO
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Half Marathon10K
All-Out Summer Breeze
Jun 13, 2026
Arvada, CO
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Half MarathonHalf Marathon - Military Veteran
Slacker Half Marathon-Relay-4-Mile Races
Jun 20, 2026
Georgetown, CO
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5k run or walk10k run or walk
Red, White and Brew 5k, 10k & Half Marathon
Jun 20, 2026
Windsor, CO
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Half Marathon
Estes Park Marathon & Half Marathon
Jun 21, 2026
Estes Park, CO
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Half MarathonHalf Marathon - Military Veteran
Slacker Half Marathon-Relay-4-Mile Races
Jun 27, 2026
Georgetown, CO
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Half Marathon
Colorado Brewery Running Series – The Wheat Ridge Half Marathon
Jul 5, 2026
Wheat Ridge, CO
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Half Marathon10K
All-Out Dog Days
Jul 11, 2026
Westminster, CO
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Half Marathon10k
Summer Splash Prairie Dog Half, 10k, & 5k
Jul 18, 2026
Castle Rock, CO
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Aspen Valley MarathonAspen Valley HALF Marathon
Aspen Valley Marathon
Jul 25, 2026
Aspen, CO
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5K10K
Popsicle 5K/10K/Half Marathon -Colorado Springs
Aug 1, 2026
Colorado Springs, CO
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Half Marathon
Rocky Mountain Half Marathon
Aug 1, 2026
Estes Park, CO
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10K5K
5K - Individual Age group/open
Aug 1, 2026
Colorado Springs, CO
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5K5K-No Shirt
Popsicle 5K/10K/Half - Colorado Springs
Aug 1, 2026
Colorado Springs, CO
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Half Marathon50k
Sheep Mountain Trail Runs
Aug 1, 2026
Fairplay, CO
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MarathonHalf Marathon
Bound for Boston Marathon & Half Marathon - Denver
Aug 2, 2026
Denver, CO
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Half Marathon10K
Human Race Half Marathon, 10k & 5k
Aug 8, 2026
Fort Collins, CO
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Half Marathon10K
All-Out Runapalooza
Aug 8, 2026
Arvada, CO
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Half Marathon5k
Erie Half & 5k
Aug 16, 2026
Erie, CO
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Half Marathon5K
Byers Peak Stampede Half Marathon & 5K Run
Aug 22, 2026
Fraser, CO
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Staunton Rocks! MarathonStaunton Rocks! Half Marathon
Staunton Rocks! Marathon and Half Marathon
Aug 22, 2026
Pine, CO
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Half Marathon10k
Pioneer Prairie Dog Half, 10k & 5k
Aug 23, 2026
Westminster, CO
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5k10k
Golden Harvest Half Marathon & 5k/10k - Denver
Sep 5, 2026
Denver, CO
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5k10k
Golden Harvest Half Marathon & 5k/10k - Colorado Springs
Sep 6, 2026
Colorado Springs, CO
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Half Marathon10K
Labor Day Half Marathon
Sep 7, 2026
Parker, CO
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Trail Sisters Women's Half MarathonTrail Sisters Women's 10k
Trail Sisters Women's Half Marathon & 10k
Sep 12, 2026
Buena Vista, CO
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Black Squirrel Half Marathon
Black Squirrel Half Marathon
Sep 12, 2026
Bellvue, CO
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