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

Jan

30

Time Travel Half-Marathon/5K/10K - Denver

Denver, Colorado, United States

$15.00 - $56.00

Running

Kid's Dash 1.6K 5K 10K +3

Jan

31

Time Travel Half-Marathon/5K/10K - Colorado Springs

Colorado Springs, Colorado, United States

$15.00 - $54.00

Running

Kid's Dash 1.6K 5K 10K +3

Feb

06

All-Out Mardi Crawl

Arvada, Colorado, United States

$25.00 - $70.00

Running

Half-Marathon 10K 5K +2

Feb

06

Westy Winter Waggle 5&10k

Westminster, Colorado, United States

$35.00

Running

5K 10K

Feb

07

Old Man Winter Bike Rally & Run

Lyons, Colorado, United States

Running

Ultra 10K 5K 49.9K

Feb

13

Valentine's Day Run 5K/10K/13.1 Denver/Aurora

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Feb

17

C.o.p.s. Winter Race Series

Golden, Colorado, United States

$30.00 - $100.00

Running

C.O.P.S. RACE SERIES BUNDLE 5K 10K C.O.P.S. 60 Minutes +2

Feb

27

Run Together Against Breast Cancer Denver/Aurora

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Feb

27

Run For Mental Health Denver/Aurora

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Mar

06

Time to Paddy 5K/10K & Lucky 13.1 13.1 - Denver

Denver, Colorado, United States

Free - $61.00

Running

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

Mar

07

Time to Paddy 5K/10K & Lucky 13.1 - Colorado Springs

Colorado Springs, Colorado, United States

Free - $48.00

Running

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

Mar

14

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

Severance, Colorado, United States

$20.00 - $80.00

Running

5K 10K 15K 1K +1