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

Oct

11

Your Story Isn't Over 5k/10k/Kids 1-Mile

Littleton, Colorado, United States

$25.00 - $45.00

Running

1.6K 10K 5K

Oct

25

Ghosts and Goblins 5K/10K

Denver, Colorado, United States

$33.00 - $43.00

Running

5K 10K

Oct

31

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

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Oct

31

Spooky Sprint - Colorado Springs

Colorado Springs, Colorado, United States

$22.00 - $36.00

Running

1.6K 5K 10K

Oct

31

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

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Nov

01

All-Out Kooky-Spooky

Golden, Colorado, United States

$35.00 - $80.00

Running

Half-Marathon 10K 5K +2

Nov

01

Feet for Justice Run

Denver, Colorado, United States

$10.00 - $40.00

Running

10K 5K Kids Run

Nov

07

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

Denver, Colorado, United States

$23.00 - $65.00

Running Walking

5K 10K 1.6K

Nov

07

Alamosa Veterans Memorial Park Race

Alamosa, Colorado, United States

$20.00 - $35.00

Running

5K 10K

Nov

07

Turkey Trails- Denver

Littleton, Colorado, United States

$22.00 - $67.00

Running

1.6K 5K 10K Half-Marathon

Nov

08

Turkey Trails - Colorado Springs

Colorado Springs, Colorado, United States

$22.00 - $54.00

Running

1.6K 5K 10K Half-Marathon

Nov

14

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

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2