Colorado Half Marathon Races

Upcoming 13.1-mile races in Colorado. Compare dates, courses, and registration.

Race List

October 10, 2026

Long View Marathon & Half

October 11, 2026

Westy Half & 5K

February 6, 2027

Stories Trail Runs

Colorado Springs

April 11, 2027

Spring Fling Prairie Dog Half Marathon 10K & 5K

April 18, 2027

Horsetooth Half Marathon

April 24, 2027

NoCo Half Marathon & 10K

May 2, 2027

Longmont Half Marathon & 5K

May 8, 2027

Valkyrie Trail Race

Colorado Springs

May 15, 2027

Denver Colfax Marathon and Half Marathon

May 15, 2027

Endure Trail Runs

June 6, 2027

Colorado 13er

June 12, 2027

Summits Trail Runs

June 19, 2027

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

July 17, 2027

Summer Splash Prairie Dog Half Marathon, 10k & 5k

August 6, 2027

Rocky Mountain Half & 5K

August 15, 2027

Erie Half & 5K

August 22, 2027

Pioneer Prairie Dog Half Marathon, 10K & 5K