Colorado
Here's a full listing of races and events in Colorado.
Visit these pages for just marathons, half marathon, 10K or 5K races.
featured races
Currently there are no featured events for this state.
running & multisport races
Dec 12, 2026
Thorntonfeatured events
OTC Butte To Butte Presented by Rexius
Jul 4, 2026
/
Eugene
Cultus Lake Triathlon
Sep 20, 2026
/
Chilliwack
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