5K races in Colorado, United States — 2026 running calendar

RMRR October Trophy Series

Aurora, Colorado, United States

04 Oct, 2026 (Sun)

$10.00

Running

12.9K 5K

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

Windsor, Colorado, United States

04 Oct, 2026 (Sun)

$20.00 - $115.00

Running

Marathon Half-Marathon 10K 5K +1

The Long View Marathon

Fort Collins, Colorado, United States

10 Oct, 2026 (Sat)

$35.00 - $110.00

Running

Marathon Half-Marathon 5K

Breckenridge RunFest

Breckenridge, Colorado, United States

10 Oct, 2026 (Sat) – 11 Oct, 2026

$25.00 - $120.00

Running

10K 5K 1.6K Marathon +1

Dialysis Dash 5K

Grand Junction, Colorado, United States

10 Oct, 2026 (Sat)

$20.00

Running

5K

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

Centennial, Colorado, United States

10 Oct, 2026 (Sat) – 28 Nov, 2026

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

Manitou 5K

Manitou Springs, Colorado, United States

10 Oct, 2026 (Sat)

$25.00 - $40.00

Running

5K

Footsteps for Families 5k Fun Run & Concert

Windsor, Colorado, United States

10 Oct, 2026 (Sat)

$25.00 - $50.00

Running

5K

Westy Half & 5k

Westminster, Colorado, United States

11 Oct, 2026 (Sun)

$45.00 - $70.00

Running

Half-Marathon 5K

The Moony Pride 5k

Fort Collins, Colorado, United States

11 Oct, 2026 (Sun)

Free

Running

5K

Durango Marathon

Durango, Colorado, United States

11 Oct, 2026 (Sun)

$30.00 - $140.00

Running

Marathon Half-Marathon 5K

Living Water 5K Fun Run

Denver, Colorado, United States

17 Oct, 2026 (Sat)

$30.00

Running

5.1K