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

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

Centennial, Colorado, United States

Sep 26, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

2026 Suicide Prevention Color Walk/Run

Center, Colorado, United States

Sep 26, 2026 (Sat)

$25.00

Running

5K

McGinn Memorial Cross Country Challenge

Pagosa Springs, Colorado, United States

Sep 26, 2026 (Sat)

Free

Running

3K 5K

HRCA Oktoberfest 5K

Littleton, Colorado, United States

Sep 26, 2026 (Sat)

$40.00

Running

5K

Joy & Justice 5k

Timnath, Colorado, United States

Sep 27, 2026 (Sun)

$15.00 - $40.00

Running, Walking

5K 1.6K

Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States - Colorado

Boulder, Colorado, United States

Sep 27, 2026 (Sun)

$40.00 - $500.00

Running

Half-Marathon 5K 10K

14er Fest 14K & 5K

Buena Vista, Colorado, United States

Sep 27, 2026 (Sun)

$35.00 - $50.00

Running

14K 5K

Pat Mahan Memorial Foundation 5K

Wiggins, Colorado, United States

Sep 27, 2026 (Sun)

$40.00

Running

5K

Lafayette Music Fest -5K - 10K

Lafayette, Colorado, United States

Oct 3, 2026 (Sat)

$45.00 - $65.00

Running

10K 5K

Spooky Sprint - Denver

Littleton, Colorado, United States

Oct 3, 2026 (Sat)

$25.00 - $67.00

Running

1.6K 5K 10K Half-Marathon

Big Waves Family 5K run/walk Presented by Brumate

Westminster, Colorado, United States

Oct 3, 2026 (Sat)

$40.00

Running

5K

Homecoming 5K - Colorado State University

Fort Collins, Colorado, United States

Oct 3, 2026 (Sat)

$25.00 - $35.00

Running

5K +1