Running Race Calendar in Colorado, United States

Big Waves Family 5K run/walk Presented by Brumate

Westminster, Colorado, United States

Oct 3, 2026 (Sat)

$40.00

Running

5K

Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run

Windsor, Colorado, United States

Oct 4, 2026 (Sun)

$20.00 - $115.00

Running

Marathon Half-Marathon 10K 5K +1

RMRR October Trophy Series

Aurora, Colorado, United States

Oct 4, 2026 (Sun)

$10.00

Running

12.9K 5K

Kids' Fall Series - Where Kids Run Free!

Colorado Springs, Colorado, United States

Oct 4, 2026 (Sun) – Nov 15, 2026

Free

Running

Super Mini Series - All Race Days Mini Series - All Race Days Short Series - All Race Days Long Series - All Race Days

Fall Series - Get Dirty! Get Muddy!

Colorado Springs, Colorado, United States

Oct 4, 2026 (Sun) – Nov 15, 2026

$35.00 - $110.00

Running

Full Series 6.1K 6.4K 8.7K +1

Breckenridge RunFest

Breckenridge, Colorado, United States

Oct 10, 2026 (Sat) – Oct 11, 2026

$25.00 - $120.00

Running

10K 5K 1.6K Marathon +1

The Long View Marathon

Fort Collins, Colorado, United States

Oct 10, 2026 (Sat)

$35.00 - $110.00

Running

Marathon Half-Marathon 5K

Footsteps for Families 5k Fun Run & Concert

Windsor, Colorado, United States

Oct 10, 2026 (Sat)

$25.00 - $50.00

Running

5K

Dialysis Dash 5K

Grand Junction, Colorado, United States

Oct 10, 2026 (Sat)

$30.00

Running

5K

Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

Oct 10, 2026 (Sat) – Nov 28, 2026

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

Manitou 5K

Manitou Springs, Colorado, United States

Oct 10, 2026 (Sat)

$25.00 - $40.00

Running

5K

Kipling Villas 5K -

Littleton, Colorado, United States

Oct 10, 2026 (Sat)

$15.00

Running

5K