10K races in Colorado

27 upcoming 10K races in Colorado. Filter by date, exact distance, or elevation.

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This calendar in numbers

This calendar currently lists 27 upcoming events, from Sep 26, 2026 to Jul 8, 2027. October is the busiest month, with 14 events scheduled. Events are spread across 21 different locations; Denver hosts the most (4). Course distances range from 3.2 km to 10 km.