10K races in Colorado, United States — 2026 running calendar

Breckenridge RunFest

Breckenridge, Colorado, United States

10 Oct, 2026 (Sat) – 11 Oct, 2026

$25.00 - $120.00

Running

10K 5K 1.6K Marathon +1

Ghosts and Goblins 5K/10K

Denver, Colorado, United States

25 Oct, 2026 (Sun)

$30.00 - $40.00

Running

5K 10K

Spooky Sprint - Colorado Springs

Colorado Springs, Colorado, United States

31 Oct, 2026 (Sat)

$22.00 - $30.00

Running

1.6K 5K 10K

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

Feet for Justice Run

Denver, Colorado, United States

01 Nov, 2026 (Sun)

$10.00 - $35.00

Running

10K 5K Kids Run

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

Alamosa Veterans Memorial Park Race

Alamosa, Colorado, United States

07 Nov, 2026 (Sat)

$20.00 - $35.00

Running

5K 10K

Turkey Trails- Denver

Littleton, Colorado, United States

07 Nov, 2026 (Sat)

$22.00 - $61.00

Running

1.6K 5K 10K Half-Marathon

Turkey Trails - Colorado Springs

Colorado Springs, Colorado, United States

08 Nov, 2026 (Sun)

$22.00 - $48.00

Running

1.6K 5K 10K Half-Marathon

Veterans Day Freedom Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

14 Nov, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2