Race Calendar in Colorado, United States

Ghosts and Goblins 5K/10K

Denver, Colorado, United States

25 Oct, 2026 (Sun)

$30.00 - $40.00

Running

5K 10K

Foundry Halloween 5k

Steamboat Springs, Colorado, United States

31 Oct, 2026 (Sat)

$25.75

Running

5K

Halloween Fun Run 5k & 1mile - Zombie Theme

Idaho Springs, Colorado, United States

31 Oct, 2026 (Sat)

$20.00

Running

5K 1.6K

Spooky Sprint - Colorado Springs

Colorado Springs, Colorado, United States

31 Oct, 2026 (Sat)

$22.00 - $30.00

Running

1.6K 5K 10K

I Ain't Scared (of 5k)

Thornton, Colorado, United States

31 Oct, 2026 (Sat)

$40.00

Running

5K

PB&J Fuel Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

31 Oct, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

31 Oct, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

All-Out Kooky-Spooky

Golden, Colorado, United States

01 Nov, 2026 (Sun)

$25.00 - $70.00

Running

Half-Marathon 10K 5K +2

RMRR November Trophy Series

Denver, Colorado, United States

01 Nov, 2026 (Sun)

$10.00

Running

15K 5K

Bell Ringer 2 Miler

Loveland, Colorado, United States

07 Nov, 2026 (Sat)

$20.00

Running

3.2K

HRCA Backcountry Wilderness Half Marathon

Lone Tree, Colorado, United States

07 Nov, 2026 (Sat)

$65.00

Trail running

Half-Marathon

City Park Classic (5k/10k & 1 Mile Walk of Hope for Pancreatic Cancer Research)

Denver, Colorado, United States

07 Nov, 2026 (Sat)

$20.00 - $60.00

Running, Walking

5K 10K 1.6K