CO · May 2027
Half Marathons in Colorado in May
7 half marathons in Colorado are on the calendar for May 2027, in Fort Collins, Firestone, Colorado Springs, Denver and more. Tap a race for the course, weather, past results and how to register.
The Colorado Marathon · Fort Collins, Colorado
2C
2027 Carbon Valley Half Marathon · Firestone, Colorado
VT
Valkyrie Trail Race · Colorado Springs, Colorado
2K
2027 Kaiser Permanente Colfax Marathon · Denver, Colorado
Endure Trail Runs · Divide, Colorado
DC
Denver Colfax Marathon · Denver, Colorado
Spirit Trail Race · Buena Vista, Colorado