Race Calendar in Colorado, United States

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

Colorado Coyotes Youth XC Invitational

Cenennial, Colorado, United States

27 Sep, 2026 (Sun)

$30.00

Running

2K 3K 4K

Sawatch Ascent

Nathrop, Colorado, United States

27 Sep, 2026 (Sun)

$159.00

Trail running

Ultra

Joy & Justice 5k

Timnath, Colorado, United States

27 Sep, 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

27 Sep, 2026 (Sun)

$40.00 - $500.00

Running

Half-Marathon 5K 10K

14er Fest 14K & 5K

Buena Vista, Colorado, United States

27 Sep, 2026 (Sun)

$35.00 - $50.00

Running

14K 5K

Water For People World Water Classic

Anywhere, Colorado, United States

02 Oct, 2026 (Fri) – 11 Oct, 2026

$35.00

Running

6K Ultra Get Creative

Spooky Sprint - Denver

Littleton, Colorado, United States

03 Oct, 2026 (Sat)

$25.00 - $61.00

Running

1.6K 5K 10K Half-Marathon

PRA Miner Gold Rush

Broomfield, Colorado, United States

03 Oct, 2026 (Sat)

$25.00 - $40.00

Running

5K 1.6K

I Can 5k

Thornton, Colorado, United States

03 Oct, 2026 (Sat)

Free

Running

5K +2

Emerald Mountain Trail Run

Steamboat Springs, Colorado, United States

03 Oct, 2026 (Sat)

$25.75 - $40.75

Running

12K 6.4K

Colorado Springs Marathon, Half, 5K, and Kids K

Colorado Springs, Colorado, United States

03 Oct, 2026 (Sat)

Free - $110.00

Running

Marathon Half-Marathon 5K 1K +11