Upcoming Marathon Kids Runs within 50 miles of Denver, CO

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1
Sep 28, 2025
Sunday
Boulderthon: Downtown Boulder Marathon
26.2M, 13.1M, 10K, 5K run | kids run
Boulder, CO
Boulder County, CO
No Race Date Race Location Options
1
Sep 28, 2025
Sunday
Boulderthon: Downtown Boulder Marathon
26.2M, 13.1M, 10K, 5K run | kids run
Boulder, CO
24 miles point to point
Boulder 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.