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

Halloween Hustle for Charity

Glenwood Springs, Colorado, United States

18 Oct, 2026 (Sun)

$30.00

Running

1.5K 5.5K

The Palmer Lake .5K (Yes "Point" 5)

Palmer Lake, Colorado, United States

18 Oct, 2026 (Sun)

$15.00 - $25.00

Running

.5 (yes point 5) K 5K

Apex Foundation Trick or Trot 5K & Halloween Hunt

Arvada, Colorado, United States

24 Oct, 2026 (Sat)

$10.00 - $35.00

Running

5K 1.6K

Mancos Cowboy Half Marathon, 5K, and Fun Run

Mancos, Colorado, United States

24 Oct, 2026 (Sat)

Free - $65.00

Running

Half-Marathon 5K 1.6K

Race to Cure Sarcoma Denver

Denver, Colorado, United States

24 Oct, 2026 (Sat)

$10.00 - $35.00

Running

5K 1K +2

YMCA of Pueblo Spooky Sprint 5K

Pueblo, Colorado, United States

24 Oct, 2026 (Sat)

$30.00

Running

5K

Ghosts and Goblins 5K/10K

Denver, Colorado, United States

25 Oct, 2026 (Sun)

$30.00 - $40.00

Running

5K 10K

The 14th Annual Odyssey Odyssey - 2026

Denver, Colorado, United States

25 Oct, 2026 (Sun)

Free

Running

5K 1.6K

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

Foundry Halloween 5k

Steamboat Springs, Colorado, United States

31 Oct, 2026 (Sat)

$25.75

Running

5K

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

I Ain't Scared (of 5k)

Thornton, Colorado, United States

31 Oct, 2026 (Sat)

$40.00

Running

5K