Upcoming Half Marathons within 50 miles of Thornton, CO

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All Colorado
Name Open Date Close Date
With Virtual Option
1. Choice City Running Festival - Mountain Avenue Mile & Human Race
2. Georgetown to Idaho Springs Half Marathon
3. Hometown Half Marathon
4. Erie Half & 5K
5. Labor Day Half Marathon
6. Sloan's Lake Search Party (SLSP)! Marathon Hourly Loop Race
7. All-Out Fall Fest
8. Nun Run
9. Fall Equinox Marathon
10. Prairie Dog Half and 10K/5K
11. Boulderthon: Downtown Boulder Marathon
12. Spooky Sprint
13. Colorado Brewery Running Series
14. Windsor Marathon
15. Long View Marathon
16. Westy Half & 5K
17. All-Out Kooky-Spooky
18. All-Out Fa La La
19. All-Out Polar Prowl
20. Arctic Prairie Dog Half - Westminster

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.