Running Race Calendar in Colorado, United States

Staunton Rocks! Marathon and Half Marathon

Pine, Colorado, United States

22 Aug, 2026 (Sat)

$110.00 - $130.00

Running

Marathon Half-Marathon

Ram Run

Denver, Colorado, United States

22 Aug, 2026 (Sat)

$20.00 - $35.00

Running

5K 2K

Jog in the Bog 5k

Westminster, Colorado, United States

22 Aug, 2026 (Sat)

$45.00

Running

5K

Byers Peak Stampede Half Marathon & 5K Run

Fraser, Colorado, United States

22 Aug, 2026 (Sat)

$60.00 - $80.00

Running

Half-Marathon 4.8K

Pioneer Prairie Dog Half, 10k & 5k

Westminster, Colorado, United States

23 Aug, 2026 (Sun)

$40.00 - $80.00

Running

Half-Marathon 10K 5K

Rebel Run 5k

Denver, Colorado, United States

23 Aug, 2026 (Sun)

$10.00 - $50.00

Running, Walking

5K

11th Annual Log Hill Hustle

Ridgway, Colorado, United States

23 Aug, 2026 (Sun)

$30.00

Running, Wheelchair

5K 10K

Rmrr Fall Marathon Training Series

Thornton, Colorado, United States

23 Aug, 2026 (Sun) – 20 Sep, 2026

$20.00 - $75.00

Running

16.1K 32.2K

Run Like the Wind 5k / 2k / Dog Jog

Allenspark, Colorado, United States

29 Aug, 2026 (Sat)

$20.00 - $35.00

Running

5K 2K

Rocky Mountain 5K presented by School District 11

Colorado Springs, Colorado, United States

29 Aug, 2026 (Sat)

Free - $35.00

Running

5K 1K

Run to Breast Cancer 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

29 Aug, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Historic Elizabeth Main Street 5K & Family Color Run

Elizabeth, Colorado, United States

29 Aug, 2026 (Sat)

$10.00 - $25.00

Running

5K 1.6K