Half-Marathon races in Colorado, United States — 2026 running calendar

Feb

11

Fifty States Half Marathon Club Life Membership

Colorado Springs, Colorado, United States

$429.00

Running

Half-Marathon

Aug

29

Run to Breast Cancer 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

Running

5K 10K Half-Marathon 1.6K +2

Aug

23

Pioneer Prairie Dog Half, 10k & 5k

Westminster, Colorado, United States

Running

Half-Marathon 10K 5K

Aug

22

Staunton Rocks! Marathon and Half Marathon

Pine, Colorado, United States

Running

Marathon Half-Marathon

Aug

15

Cookie Run 5K/10K/13.1 Denver/Aurora

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

Aug

15

Run for PB& J 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

Running

5K 10K Half-Marathon 1.6K +2

Aug

07

Choice City Running Festival

Fort Collins, Colorado, United States

Running Walking

1.6K 5K 10K Half-Marathon +7

Jul

25

Christmas 5K/10K/Half Marathon in July Meet Up - Denver

Littleton, Colorado, United States

Running

5K 10K Half-Marathon

Jul

25

Run for Coffee Lovers 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

Running

5K 10K Half-Marathon 1.6K +2

Jul

25

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

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +8

Jul

25

Aspen Valley Marathon

Aspen, Colorado, United States

Running

Marathon Half-Marathon 5K

Jul

12

Heatwave Half Marathon - Colorado Springs

Colorado Springs, Colorado, United States

Running

1.6K 5K 10K Half-Marathon +1