CO · October 2027

Half Marathons in Colorado in October

4 half marathons in Colorado are on the calendar for October 2027, in Boulder, Westminster, Fort Collins. Tap a race for the course, weather, past results and how to register.

2027 Boulderthon · Boulder, Colorado

Solid Pick53Expected~OCT 2027

2027 Westminster Half Marathon & 5K · Westminster, Colorado

Solid Pick56OCT 10

2027 Blue Sky Trail Marathon & Half Marathon · Fort Collins, Colorado

Standout62OCT 15

2027 The Long View Marathon · Fort Collins, Colorado

Standout66OCT 15

All upcoming half marathons in Colorado→