Upcoming Half Marathons within 50 miles of Boulder, CO on Sundays

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Featured Listing
1. Fall Equinox Marathon
1. I'm Bound for Boston Marathon & Half Marathon - Denver
2. Hometown Half Marathon
3. Erie Half & 5K
4. Rock Hawk Trail Races
5. Calarat Challenge Trail Running Festival
6. Nun Run
7. Fall Equinox Marathon
8. Bear Chase Race - Half Marathon & 10K
9. Boulderthon: Downtown Boulder Marathon
10. Colorado Brewery Running Series
11. Windsor Marathon
12. Westy Half & 5K
13. All-Out Kooky-Spooky
14. Arctic Prairie Dog Half - Westminster
15. All-Out Spring Fever
16. Horsetooth Half Marathon
17. Platte River Half Marathon
18. Spring Fling Prairie Dog Half
19. NOCO Half Marathon & 10K
20. Colorado 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.