Half Marathons in Colorado, United States 2026
21.1 kilometres (13.1 miles) — the bridge between the 10K and the full marathon. Browse upcoming events in United States.
10 upcoming races
Upcoming Races
Running
Bound for Boston Marathon & Half Marathon - Denver
Aug 2, 2026Denver, USA
Run 42 m
Running
Georgetown to Idaho Springs Half Marathon 2026
Aug 8, 2026Idaho Springs, USA
Run 21 m
Running
2026 Mt. Sneffels Half Marathon-10K-Kids-Fun Run
Aug 15, 2026Ridgway, USA
Run 10 m
Running
Byers Peak Stampede Half Marathon & 5K Run
Aug 22, 2026Fraser, USA
Run 21 m
Running
Black Squirrel Half Marathon
Sep 12, 2026Bellvue, USA
Run 21 m
Running
Deep Creek Trail Half Marathon
Sep 26, 2026Telluride, USA
Run 21 m
Running
Blue Sky Trail Marathon & Half Marathon
Oct 17-18, 2026Fort Collins, USA
Run 42 m
Running
22nd Annual Run Through Time Trail Marathon and Half Marathon
Mar 13, 2027Salida, USA
Run 42 m
Running
All-Out Beat the Heat
Apr 24, 2027Westminster, USA
Run 5 m
Running
Colorado 13er (Half Marathon/10k/5k)
Jun 6, 2027Louisville, USA
Run 21 m