Half Marathons within 50 miles of Thornton, CO on Sundays
City Location
Featured Listing
1. 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
1. Adams Half & 5K
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Past DateSep 17, 2023Sunday
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13.1M, 5K run
More Information
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Brighton, CO
12 miles point to pointAdams County, CO
2. Ralston Creek Half Marathon
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Past DateFeb 18, 2024Sunday
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13.1M, 5K run
More Information
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Arvada, CO
7 miles point to pointJefferson County, CO
3. That Dam Run
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Past DateMar 3, 2024Sunday
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13.1M, 10K, 5K run | kids run
More Information
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Greenwood Village, CO
17 miles point to pointArapahoe County, CO
4. Time to Paddy 5K/10K and Lucky 13.1
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Past DateMar 3, 2024Sunday
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13.1M, 10K, 5K run | kids run
Virtual OptionMore Information
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Denver, CO
9 miles point to pointDenver County, CO
5. Spring Equinox Races
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Past DateMar 24, 2024Sunday
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13.1M, 5K run
More Information
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Fort Collins, CO
50 miles point to pointLarimer County, CO
6. Three Creeks Half Marathon
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Past DateApr 7, 2024Sunday
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13.1M run
More Information
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Denver, CO
9 miles point to pointDenver County, CO
7. Blue Heron Half and 5K
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Past DateApr 21, 2024Sunday
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13.1M, 5K run
More Information
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Brighton, CO
12 miles point to pointAdams County, CO
8. Boulder Mothers Day Run
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Past DateMay 12, 2024Sunday
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13.1M, 10K, 5K trail run
More Information
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Boulder, CO
19 miles point to pointBoulder County, CO
9. Estes Park Marathon
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Past DateJun 16, 2024Sunday
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26.2M, 13.1M run
Virtual OptionMore Information
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Estes Park, CO
46 miles point to pointLarimer County, CO
10. I'm Bound for Boston Marathon & Half Marathon - Denver
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Aug 4, 2024Sunday
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26.2M, 13.1M run
More Information
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Denver, CO
9 miles point to pointDenver County, CO
11. 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
4 miles point to pointAdams County, COJefferson County, CO
12. 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
13 miles point to pointWeld County, CO
13. Rock Hawk Trail Races
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Aug 25, 2024Sunday
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13.1M, 10K, 5K trail run
More Information
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Castle Rock, CO
35 miles point to pointDouglas County, CO
14. Calarat Challenge Trail Running Festival
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Sep 1, 2024Sunday
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13.1M, 10K trail run
More Information
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Jamestown, CO
28 miles point to pointBoulder County, CO
15. 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
9 miles point to pointDenver County, CO
16. 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
50 miles point to pointLarimer County, CO
17. 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
13 miles point to pointJefferson County, CO
18. 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
19 miles point to pointBoulder County, CO
19. 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
50 miles point to pointLarimer County, CO
20. Windsor Marathon
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Oct 6, 2024Sunday
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26.2M, 13.1M, 10K, 5K run | kids run
More Information
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Windsor, CO
42 miles point to pointWeld 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.
