10K Races in Colorado — 2026

There are 9 10K races in Colorado scheduled for 2026. The next is the Ourayce 10K Fun Run in Ouray on July 4. Colorado 10K races run primarily July through March.

Grin & Bear It

Sat, Jul 11 · Crested Butte, CO Crested Butte
15 km Out and BackMountain Bike25 km Loop
From $75 Open 75 spots left
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RMRR Fall Marathon Training Series

Sun, Aug 23 · Thornton, CO Thornton
RMRR Fall Marathon Training - 3 race bundle Short (10m, 20k, 10m)RMRR Fall Marathon Training Series #1 - 10 MileRMRR Fall Marathon Training - 3 race bundle Long ( 20m, 30k, 20m) +1
From $20 Closed
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Thornton 2 Berthoud 1 Clark 1 Crested Butte 1 Leadville 1 Ouray 1 Alamosa 1 Westminster 1

All Colorado Races

View all running races in Colorado →