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

New Year's Run 5K/10K/13.1 Denver/Aurora

Centennial, Colorado, United States

26 Dec, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

A Merry Christmas Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

26 Dec, 2026 (Sat)

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

All-Out Polar Prowl

Arvada, Colorado, United States

09 Jan, 2027 (Sat)

$20.00 - $65.00

Running

Half-Marathon 10K 5K +2

All-Out Mardi Crawl

Arvada, Colorado, United States

06 Feb, 2027 (Sat)

$20.00 - $65.00

Running

Half-Marathon 10K 5K +2

Lucky Brew Race 5K, 10K, 15k & Half Marathon

Severance, Colorado, United States

14 Mar, 2027 (Sun)

$15.00 - $70.00

Running

5K 10K 15K 1K +1

All-Out Spring Fever

Golden, Colorado, United States

21 Mar, 2027 (Sun)

$20.00 - $65.00

Running

Half-Marathon 10K 5K +2

All-Out Beat the Heat

Westminster, Colorado, United States

24 Apr, 2027 (Sat)

$20.00 - $65.00

Running

Half-Marathon 10K 5K +2

The Colorado Marathon

Fort Collins, Colorado, United States

02 May, 2027 (Sun)

Running

Marathon Half-Marathon 5K 10K

Memorial Day Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

23 May, 2026 (Sat)

Running

5K 10K Half-Marathon 1.6K +2

Run for Mental Health 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

23 May, 2026 (Sat) – 14 Nov, 2026

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +14

8th Annual Angel Run at Red Leg Brewing

Colorado Springs, Colorado, United States

22 May, 2026 (Fri) – 25 May, 2026

Running

5K 10K +2

Spirit Challenge Run for Autism 10k and 5k

Steamboat Springs, Colorado, United States

16 May, 2026 (Sat)

Running

10K 5K