5K races in Colorado, United States — 2026 running calendar

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

Centennial, Colorado, United States

15 Aug, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Bagel Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

15 Aug, 2026 (Sat) – 10 Oct, 2026

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

Cwcs 5K Color Fun Run

Montrose, Colorado, United States

15 Aug, 2026 (Sat)

$40.00

Running

5K

Miles for Migraine Colorado

Denver, Colorado, United States

15 Aug, 2026 (Sat)

Running

3.2K 5K

Frontier Academy Community 5K

Greeley, Colorado, United States

15 Aug, 2026 (Sat)

$25.00

Running

5K

Cancer League of Colorado Race 4 Research

Denver, Colorado, United States

16 Aug, 2026 (Sun)

$40.00

Running

5K

Erie Half & 5k

Erie, Colorado, United States

16 Aug, 2026 (Sun)

$45.00 - $70.00

Running

Half-Marathon 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

2026 True Impact Ministries 5K/10K

Centennial, Colorado, United States

22 Aug, 2026 (Sat)

$39.00

Running

5K 10K

Jog in the Bog 5k

Westminster, Colorado, United States

22 Aug, 2026 (Sat)

$45.00

Running

5K

Ram Run

Denver, Colorado, United States

22 Aug, 2026 (Sat)

$20.00 - $35.00

Running

5K 2K

Pioneer Prairie Dog Half, 10k & 5k

Westminster, Colorado, United States

23 Aug, 2026 (Sun)

$40.00 - $80.00

Running

Half-Marathon 10K 5K