Running Race Calendar in Colorado, United States

Heatwave Half Marathon - Denver

Littleton, Colorado, United States

11 Jul, 2026 (Sat)

$22.00 - $73.00

Running

1.6K 5K 10K Half-Marathon +1

Cookie Chase

Denver, Colorado, United States

11 Jul, 2026 (Sat)

$33.00

Running

5K

Paint the Prairie

Aurora, Colorado, United States

11 Jul, 2026 (Sat)

$15.00

Running

1.6K

Grin & Bear It

Crested Butte, Colorado, United States

11 Jul, 2026 (Sat)

$90.00 - $110.00

Running, Cycling

25K 15K 23.9K

All-Out Dog Days

Westminster, Colorado, United States

11 Jul, 2026 (Sat)

$35.00 - $80.00

Running

Half-Marathon 10K 5K +2

Heatwave Half Marathon - Colorado Springs

Colorado Springs, Colorado, United States

12 Jul, 2026 (Sun)

$22.00 - $60.00

Running

1.6K 5K 10K Half-Marathon +1

RMRR July Trophy Series

Lakewood, Colorado, United States

12 Jul, 2026 (Sun)

$10.00

Running

3.2K

PNAAF 5K Wellness Challenge

Colorado Springs, Colorado, United States

16 Jul, 2026 (Thu)

$35.00

Running

5K

2026 OCA Colorado 5K Panda Run

Denver, Colorado, United States

18 Jul, 2026 (Sat)

$35.00

Running, Walking

5K 1K

Summer Splash Prairie Dog Half, 10k, & 5k

Castle Rock, Colorado, United States

18 Jul, 2026 (Sat)

$45.00 - $85.00

Running

Half-Marathon 10K 5K

CU Anschutz Run Club 5K

Aurora, Colorado, United States

18 Jul, 2026 (Sat)

$7.00 - $20.00

Running

5K

Heritage Eagles 5K

Littleton, Colorado, United States

18 Jul, 2026 (Sat)

$30.00

Running

5K