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

Apr

10

Run for Bagels 5K/10K/13.1 Denver/Aurora

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Apr

24

Run for Donut Denver/Aurora

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

Apr

24

All-Out Beat the Heat

Westminster, Colorado, United States

$20.00 - $65.00

Running

Half-Marathon 10K 5K +2

Apr

24

DoNot Stop Half Marathon/5K/10K - Colorado Springs

Colorado Springs, Colorado, United States

Free - $42.00

Running

Kid's Dash 1.6K 5K 10K +5

Apr

25

DoNot Stop Half Marathon/5K/10K - Denver

Denver, Colorado, United States

Free - $55.00

Running

Kid's Dash 1.6K 5K 10K +4

May

02

The Colorado Marathon

Fort Collins, Colorado, United States

Running

Marathon Half-Marathon 5K 10K

May

08

Run for Chocolate 5k/10k/13.1 Denver/Aurora

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

May

09

Colorado Women's Classic - Westminster

Westminster, Colorado, United States

Free - $55.00

Running

5K 10K 16.1K Kids Fun Run (100 yards)

Jun

06

The Steamboat Marathon

Steamboat Springs, Colorado, United States

$70.00 - $125.00

Running

Marathon Half-Marathon 10K

Jun

06

Colorado 13er (Half Marathon/10k/5k)

Louisville, Colorado, United States

$35.00 - $65.00

Running

Half-Marathon 10K 5K

Jun

12

All-Out Summer Breeze

Arvada, Colorado, United States

$20.00 - $65.00

Running

Half-Marathon 10K 5K +2

Jun

19

Red, White and Brew 5k, 10k & Half Marathon

Windsor, Colorado, United States

$18.00 - $68.00

Running

5K 10K Half-Marathon 1.6K +2