Upcoming Half Marathons within 50 miles of Broomfield, CO on Weekends

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All Colorado
Name Open Date Close Date
With Virtual Option
1. All-Out Summer Breeze
2. Colorado Brewery Running Series
3. Estes Park Marathon
4. Red, White and Brew 5K, 10K & Half Marathon
5. Slacker Half Marathon
6. All-Out Dog Days
7. Prairie Dog Half and 10K - Castle Rock
8. All-Out Runapalooza
9. Boulder Rez Marathon
10. Rocky Mountain Half Marathon
11. Choice City Running Festival - Mountain Avenue Mile & Human Race
12. Georgetown to Idaho Springs Half Marathon
13. Hometown Half Marathon
14. Erie Half & 5K
15. Byers Peak Stampede
16. Staunton Rocks! Marathon & Half
17. Westminster Trail Race
18. Calarat Challenge Trail Running Festival
19. Black Squirrel Half Marathon
20. Sloan's Lake Search Party (SLSP)! Marathon Hourly Loop Race

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.