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

Mar

20

St. Paddy's Day Lucky Run 5K/10K/13.1 Denver/Aurora

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Mar

21

All-Out Spring Fever

Golden, Colorado, United States

$25.00 - $70.00

Running

Half-Marathon 10K 5K +2

Mar

27

Always Hope Easter Run Denver/Aurora

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

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

10

Run for Pb&J 5k/10k/13.1 Denver/Aurora

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Apr

11

Spring Fling Prairie Dog Half, 10k, & 5k

Arvada, Colorado, United States

$39.00 - $74.00

Running

Half-Marathon 10K 5K

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

24

Run for Donut Denver/Aurora

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

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