Half Marathons within 50 miles of Thornton, CO on Sundays

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All Colorado
Name Open Date Close Date
With Virtual Option
1. Adams Half & 5K
2. Latino Ultra Nature Adventure
3. Ralston Creek Half Marathon
4. That Dam Run
5. Time to Paddy 5K/10K and Lucky 13.1
6. Spring Equinox Races
7. Three Creeks Half Marathon
8. Horsetooth Half Marathon
9. Platte River Half Marathon
10. Spring Fling Prairie Dog Half
11. Blue Heron Half and 5K
12. Colorado Marathon
13. Denver Colfax Marathon
14. Colorado 13er
15. Colorado Brewery Running Series
16. Estes Park Marathon
17. Hometown Half Marathon
18. Erie Half & 5K
19. Nun Run
20. Fall Equinox Marathon

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.