10K races in Colorado, United States — 2026 running calendar

11th Annual Log Hill Hustle

Ridgway, Colorado, United States

23 Aug, 2026 (Sun)

$30.00

Running, Wheelchair

5K 10K

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

James Test Site

Lyons, Colorado, United States

30 Aug, 2026 (Sun)

Running

5K 10K

Break Your Neck: Walk, Run, or Roll

Pueblo, Colorado, United States

05 Sep, 2026 (Sat)

Free

Running

5K 10K

Golden Harvest Half Marathon & 5k/10k - Denver

Denver, Colorado, United States

05 Sep, 2026 (Sat)

$22.00 - $67.00

Running

5K 10K Half-Marathon 1.6K

Golden Harvest Half Marathon & 5k/10k - Colorado Springs

Colorado Springs, Colorado, United States

06 Sep, 2026 (Sun)

$22.00 - $54.00

Running

1.6K 5K 10K Half-Marathon

Labor Day Half Marathon

Parker, Colorado, United States

07 Sep, 2026 (Mon)

$33.00 - $75.00

Running

Half-Marathon 10K 5K

14th Annual Superhero Event

Greeley, Colorado, United States

10 Sep, 2026 (Thu) – 27 Sep, 2026

Free - $40.00

Running

10K 5K 1.6K Kid's Fun Run (Ages 6 & Under) +5

National Chocolate Day: Run for Chocolates 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

12 Sep, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

RMRR September Trophy Series

Thornton, Colorado, United States

13 Sep, 2026 (Sun)

$10.00

Running

10K 5K

All-Out Fall Fest

Westminster, Colorado, United States

19 Sep, 2026 (Sat)

$25.00 - $70.00

Running

Half-Marathon 10K 5K +2

Beulah Challenge and OverIt Series

Beulah, Colorado, United States

19 Sep, 2026 (Sat)

$20.00 - $180.00

Running

Half-Marathon 10K 5K +2