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Colorado Half Marathon Races
13.1 miles of serious training payoff, a favorite goal race for intermediate runners across Colorado's Rocky Mountains. Find upcoming Half Marathon races near you on RaceCenter.
Marathon
Half Marathon
5K
10K
Colorado
Race List
September 19, 2026
Pikes Peak Marathon + Ascent
Colorado Springs
September 20, 2026
Fall Equinox Marathon, Half Marathon & 5 Mile
Fort Collins
September 20, 2026
Spring Equinox Half Marathon & 5k
Wellington
September 26, 2026
WILD Wahatoya Runs
September 27, 2026
Boulderthon
Boulder
October 3, 2026
Colorado Springs Marathon, Half, 5K, and Kids K
Colorado Springs
October 10, 2026
Long View Marathon & Half
Fort Collins
October 11, 2026
Westy Half & 5K
Westminster
February 6, 2027
Stories Trail Runs
Colorado Springs
April 18, 2027
Horsetooth Half Marathon
Fort Collins
April 24, 2027
NoCo Half Marathon & 10K
Loveland
May 8, 2027
Valkyrie Trail Race
Colorado Springs
May 15, 2027
Endure Trail Runs
June 6, 2027
Colorado 13er
Boulder
June 12, 2027
Summits Trail Runs
July 17, 2027
Summer Splash Prairie Dog Half Marathon, 10k & 5k
Castle Rock
August 6, 2027
Rocky Mountain Half & 5K
Boulder
August 15, 2027
Erie Half & 5K
