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

May

17

Girls on the Run Rockies Colfax SoleMates 2026

Denver, Colorado, United States

Running

Marathon Half-Marathon

May

10

Super Mom 5K/10K/Half - Colorado Springs

Colorado Springs, Colorado, United States

Running

5K 10K Half-Marathon +5

May

10

Hometown Half Marathon & 5k/10k - Denver

Littleton, Colorado, United States

Running

1.6K 5K 10K Half-Marathon +1

May

09

Hometown Half Marathon & 5k/10k - Colorado Springs

Colorado Springs, Colorado, United States

Running

5K 10K Half-Marathon 1.6K +2

May

03

Longmont Half & 5k (LM Half)

Longmont, Colorado, United States

Running

Half-Marathon 5K

May

02

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

Running

5K 10K Half-Marathon 1.6K +2

May

02

Cinco De Mayo Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

Running

5K 10K Half-Marathon 1.6K +2

Apr

12

Prairie Dog Run Series

Louisville, Colorado, United States

Running

Half-Marathon

Mar

28

Race Through Colorado 1M, 5K, 10K, 13.1, 26.2 - Now Only $20!

Denver, Colorado, United States

$20.00

Running

1.6K 5K 10K Half-Marathon +1