Half Marathons within 50 miles of Erie, CO
City Location
Featured Listing
1. Boulderthon: Downtown Boulder Marathon
-
Sep 28, 2025Sunday
-
26.2M, 13.1M, 10K, 5K run | kids run
More Information
-
Boulder, CO
Boulder County, CO
1. Great Western Trail Race
-
Past DateApr 20, 2024Saturday
-
13.1M, 10K, 5K run | kids run
More Information
-
Severance, CO
34 miles point to pointWeld County, CO
2. Time Travel Half Marathon
-
Past DateApr 20, 2024Saturday
-
13.1M, 10K, 5K run
More Information
-
Westminster, CO
15 miles point to pointAdams County, COJefferson County, CO
3. Carbon Valley Half Marathon
-
Past DateMay 11, 2024Saturday
-
13.1M, 5K, 1M run | 13.1M relay | kids run
More Information
-
Firestone, CO
7 miles point to pointWeld County, CO
4. Latino Ultra Nature Adventure
-
Past DateJun 1, 2024Saturday
-
50K, 13.1M, 7.5M, 5K run
More Information
-
Golden, CO
23 miles point to pointJefferson County, CO
5. Mountain Ridge Trail Race
-
Past DateJun 1, 2024Saturday
-
21M, 13.1M, 10K, 5K trail run
More Information
-
Highlands Ranch, CO
35 miles point to pointDouglas County, CO
6. REVEL Rockies
-
Past DateJun 1, 2024Saturday
-
26.2M, 13.1M run
More Information
-
Boston Marathon Qualifier
-
Denver, CO
22 miles point to pointDenver County, CO
7. Estes Park Marathon
-
Past DateJun 16, 2024Sunday
-
26.2M, 13.1M run
Virtual OptionMore Information
-
Estes Park, CO
34 miles point to pointLarimer County, CO
8. Slacker Half Marathon
-
Past DateJun 22, 2024Saturday
-
13.1M, 4M run | 13.1M relay
More Information
-
Georgetown, CO
41 miles point to pointClear Creek County, CO
9. Georgetown to Idaho Springs Half Marathon
-
Past DateAug 10, 2024Saturday
-
13.1M run
More Information
-
startGeorgetown, CO41 miles point to pointfinishIdaho Springs, CO32 miles point to pointClear Creek County, COClear Creek County, CO
10. Byers Peak Stampede
-
Past DateAug 24, 2024Saturday
-
13.1M, 5K trail run
More Information
-
Fraser, CO
41 miles point to pointGrand County, CO
11. Westminster Trail Race
-
Past DateAug 24, 2024Saturday
-
13.1M, 10K, 5K trail run
More Information
-
Westminster, CO
15 miles point to pointAdams County, COJefferson County, CO
12. Calarat Challenge Trail Running Festival
-
Past DateSep 1, 2024Sunday
-
13.1M, 10K trail run
More Information
-
Jamestown, CO
19 miles point to pointBoulder County, CO
13. Sloan's Lake Search Party (SLSP)! Marathon Hourly Loop Race
-
Past DateSep 7, 2024Saturday
-
26.2M, 13.1M run
More Information
-
Denver, CO
22 miles point to pointDenver County, CO
14. Ned Ned Run
-
Past DateSep 14, 2024Saturday
-
13.1M, 10K, 5K trail run
More Information
-
Nederland, CO
25 miles point to pointBoulder County, CO
15. Snow Mountain Ranch Trail Festival
-
Past DateSep 21, 2024Saturday
-
50K, 13.1M, 10K, 5K trail run | 26.2M relay
More Information
-
Granby, CO
47 miles point to pointGrand County, CO
16. Louisville Trail Race
-
Past DateSep 28, 2024Saturday
-
13.1M, 10K, 5K trail run
More Information
-
Louisville, CO
7 miles point to pointBoulder County, CO
17. Castle Rock Trail Festival
-
Past DateOct 5, 2024Saturday
-
50K, 13.1M, 10K, 5K trail run
More Information
-
Castle Rock, CO
48 miles point to pointDouglas County, CO
18. Windsor Marathon
-
Past DateOct 6, 2024Sunday
-
26.2M, 13.1M, 10K, 5K run | kids run
More Information
-
Windsor, CO
31 miles point to pointWeld County, CO
19. HRCA Backcountry Wilderness Half Marathon
-
Past DateNov 2, 2024Saturday
-
13.1M trail run
More Information
-
Highlands Ranch, CO
35 miles point to pointDouglas County, CO
20. All-Out Fa La La
-
Dec 7, 2024Saturday
-
13.1M, 10K, 5K run
Virtual OptionMore Information
-
Westminster, CO
15 miles point to pointAdams County, COJefferson 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.