Upcoming Half Marathons in Colorado on Sundays
City Location
1. Colorado Marathon
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May 5, 2024Sunday
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26.2M, 13.1M, 10K, 5K run | 26.2M relay
More Information
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Boston Marathon Qualifier
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Fort Collins, CO
Larimer County, CO
2. Boulder Mothers Day Run
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May 12, 2024Sunday
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13.1M, 10K, 5K trail run
More Information
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Boulder, CO
Boulder County, CO
3. Fruita Trail Half
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May 12, 2024Sunday
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13.1M trail run
More Information
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Fruita, CO
Mesa County, CO
4. Denver Colfax Marathon
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May 19, 2024Sunday
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26.2M, 13.1M, 10M run | 26.2M relay
More Information
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Boston Marathon Qualifier
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Denver, CO
Denver County, CO
5. Ram Party
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May 19, 2024Sunday
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26.2M, 13.1M, 9M, 5K trail run
More Information
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Colorado Springs, CO
El Paso County, CO
6. Spirit Trail Run
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May 26, 2024Sunday
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26.2M, 13.1M, 8K trail run
More Information
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Buena Vista, CO
Chaffee County, CO
7. Colorado 13er
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Jun 2, 2024Sunday
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13.1M, 10K, 5K run
More Information
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Louisville, CO
Boulder County, CO
8. Steamboat Marathon
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Jun 2, 2024Sunday
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26.2M, 13.1M, 10K run | kids run
More Information
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Boston Marathon Qualifier
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Steamboat Springs, CO
Routt County, CO
9. Colorado Brewery Running Series
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Jun 9, 2024Sunday
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13.1M, 5K run
More Information
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Littleton, CO
Arapahoe County, CO
10. Estes Park Marathon
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Jun 16, 2024Sunday
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26.2M, 13.1M run
Virtual OptionMore Information
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Estes Park, CO
Larimer County, CO
11. Emerald Mountain Epic
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Aug 4, 2024Sunday
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26.2M, 13.1M trail run
More Information
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Steamboat Springs, CO
Routt County, CO
12. Hometown Half Marathon
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Aug 11, 2024Sunday
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13.1M, 10K, 5K, 1M run | kids run
Virtual OptionMore Information
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Westminster, CO
Adams County, COJefferson County, CO
13. Erie Half & 5K
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Aug 18, 2024Sunday
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13.1M, 5K run
More Information
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Erie, CO
Weld County, CO
14. Nun Run
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Sep 15, 2024Sunday
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13.1M, 5K run
More Information
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Denver, CO
Denver County, CO
15. Fall Equinox Marathon
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Sep 22, 2024Sunday
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26.2M, 13.1M, 5M run
Virtual OptionMore Information
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Boston Marathon Qualifier
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Fort Collins, CO
Larimer County, CO
16. Red Feather Trail Jamboree
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Sep 22, 2024Sunday
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13.1M trail run
More Information
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Red Feather Lakes, CO
Larimer County, CO
17. Sunlight Showdown
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Sep 22, 2024Sunday
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13.1M trail run
More Information
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Glenwood Springs, CO
Garfield County, CO
18. Bear Chase Race - Half Marathon & 10K
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Sep 29, 2024Sunday
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13.1M, 10K trail run
More Information
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Lakewood, CO
Jefferson County, CO
19. Boulderthon: Downtown Boulder Marathon
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Sep 29, 2024Sunday
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26.2M, 13.1M, 10K, 5K run | kids run
More Information
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Boulder, CO
Boulder County, CO
20. Colorado Brewery Running Series
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Oct 6, 2024Sunday
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13.1M, 5K run
More Information
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Fort Collins, CO
Larimer County, CO
For the love of all that Is good And moisture wicking...
Though we Try To be accurate And On top Of things... Race details can change When we aren't lookin. And once in a while we simply make a mistake.
ALWAYS visit the race's website for the most complete and accurate race information.
ALWAYS visit the race's website for the most complete and accurate race information.