Race Calendar in Colorado, United States

Apex Foundation Trick or Trot 5K & Halloween Hunt

Arvada, Colorado, United States

Oct 24, 2026 (Sat)

$10.00 - $35.00

Running

5K 1.6K

Mancos Cowboy Half Marathon, 5K, and Fun Run

Mancos, Colorado, United States

Oct 24, 2026 (Sat)

Free - $75.00

Running

Half-Marathon 5K 1.6K

The 14th Annual Odyssey Odyssey - 2026

Denver, Colorado, United States

Oct 25, 2026 (Sun)

Free

Running

5K 1.6K

Ghosts and Goblins 5K/10K

Denver, Colorado, United States

Oct 25, 2026 (Sun)

$33.00 - $43.00

Running

5K 10K

I Ain't Scared (of 5k)

Thornton, Colorado, United States

Oct 31, 2026 (Sat)

$40.00

Running

5K

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

Centennial, Colorado, United States

Oct 31, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

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

Centennial, Colorado, United States

Oct 31, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Foundry Halloween 5k

Steamboat Springs, Colorado, United States

Oct 31, 2026 (Sat)

$25.75

Running

5K

Halloween Fun Run 5k & 1mile - Zombie Theme

Idaho Springs, Colorado, United States

Oct 31, 2026 (Sat)

$20.00

Running

5K 1.6K

Spooky Sprint - Colorado Springs

Colorado Springs, Colorado, United States

Oct 31, 2026 (Sat)

$22.00 - $30.00

Running

1.6K 5K 10K

RMRR November Trophy Series

Denver, Colorado, United States

Nov 1, 2026 (Sun)

$10.00

Running

15K 5K

Feet for Justice Run

Denver, Colorado, United States

Nov 1, 2026 (Sun)

$10.00 - $35.00

Running

10K 5K Kids Run