Race Calendar in Colorado, United States

All-Out Fall Fest

Westminster, Colorado, United States

19 Sep, 2026 (Sat)

$25.00 - $70.00

Running

Half-Marathon 10K 5K +2

Denver: Walk With Autism and Resource Fair

Denver, Colorado, United States

19 Sep, 2026 (Sat)

$25.00

Running

5K

Farmers 5000

Wheat Ridge, Colorado, United States

20 Sep, 2026 (Sun)

$10.00 - $30.00

Running

5K +1

20th Annual Golden Gallop

Golden, Colorado, United States

20 Sep, 2026 (Sun)

$40.00 - $45.00

Running

5K 10K 20K

Pikes Peak Marathon

Manitou Springs, Colorado, United States

20 Sep, 2026 (Sun)

Free - $225.00

Running

Marathon

Chile & Frijole Hot to Trot 5K & 10K

Pueblo, Colorado, United States

20 Sep, 2026 (Sun)

$35.00 - $40.00

Running

5K 10K

Fall Equinox

Fort Collins, Colorado, United States

20 Sep, 2026 (Sun) – 03 Oct, 2026

$50.00 - $135.00

Running

Half-Marathon 8K

CG Adventure Club - Elevation Everest

Winter Park, Colorado, United States

23 Sep, 2026 (Wed) – 27 Sep, 2026

$150.00 - $400.00

Running

35.4K Ultra

Boggy Draw Bear Chase

Dolores, Colorado, United States

25 Sep, 2026 (Fri)

Running

3K 5K

Red Feather Trail Jamboree

Red Feather Lakes, Colorado, United States

25 Sep, 2026 (Fri) – 27 Sep, 2026

$100.00 - $300.00

Trail running

Ultra Half-Marathon

2026 Suicide Prevention Color Walk/Run

Center, Colorado, United States

26 Sep, 2026 (Sat)

$25.00

Running

5K

Parker Parks and Recreation So Long to Summer 5K/10K

Parker, Colorado, United States

26 Sep, 2026 (Sat)

$40.00 - $50.00

Running

5K 10K