Running Race Calendar in Colorado, United States

Eldorado Run for the Cure

Eldorado Springs, Colorado, United States

Aug 6, 2026 (Thu)

$30.00

Running

6.4K

Choice City Running Festival

Fort Collins, Colorado, United States

Aug 7, 2026 (Fri) – Aug 8, 2026

Free - $78.00

Running

1.6K 5K 10K Half-Marathon +4

RMRR August Trophy Series

Centennial, Colorado, United States

Aug 7, 2026 (Fri)

$10.00

Running

5K

Eat. Run. Adopt. 10K

Berthoud, Colorado, United States

Aug 8, 2026 (Sat)

$60.00

Running

10K

Summer Sizzler- Denver

Thornton, Colorado, United States

Aug 8, 2026 (Sat)

$22.00 - $44.00

Running

1.6K 5K 10K 15K

Escalante Days 5K

Dolores, Colorado, United States

Aug 8, 2026 (Sat)

$30.00

Running

5K

5K at the Fair

Durango, Colorado, United States

Aug 8, 2026 (Sat)

$30.00

Running

5K

Arapahoe Warrior 5K

Centennial, Colorado, United States

Aug 8, 2026 (Sat)

$35.00

Running

5K

All-Out Runapalooza

Arvada, Colorado, United States

Aug 8, 2026 (Sat)

$40.00 - $353.00

Running

Half-Marathon 10K 5K +2

Leadville Boomdays International Pack Burro Race

Leadville, Colorado, United States

Aug 8, 2026 (Sat)

$65.00 - $80.00

Running

33.8K 12.9K

Dog Days Of Summer 2026

Longmont, Colorado, United States

Aug 8, 2026 (Sat)

$20.00 - $40.00

Running

5.6K 1K

The Bullfrog Summer Surge

Lakewood, Colorado, United States

Aug 9, 2026 (Sun)

Free - $50.00

Running

5K 0.8K