Race Calendar in Colorado, United States

Oct

25

The 14th Annual Odyssey Odyssey - 2026

Denver, Colorado, United States

Free

Running

5K 1.6K

Oct

31

I Ain't Scared (of 5k)

Thornton, Colorado, United States

$40.00

Running

5K

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

Woodmen Hills Monster Mash 5k and Beer Run

Peyton, Colorado, United States

Running

5K

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

Oct

31

Foundry Halloween 5k

Steamboat Springs, Colorado, United States

$25.75

Running

5K

Oct

31

Halloween Fun Run 5k & 1mile - Zombie Theme

Idaho Springs, Colorado, United States

$20.00

Running

5K 1.6K

Oct

31

Spooky Sprint - Colorado Springs

Colorado Springs, Colorado, United States

$22.00 - $36.00

Running

1.6K 5K 10K

Nov

01

Girls on the Run Northern Colorado Fall 5K

Fort Collins, Colorado, United States

$29.00

Running

5K

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 - $35.00

Running

10K 5K Kids Run

Nov

01

RMRR November Trophy Series

Denver, Colorado, United States

$10.00

Running

15K 5K