CO · August 2027
Half Marathons in Colorado in August
6 half marathons in Colorado are on the calendar for August 2027, in Estes Park, Arvada, Georgetown, Fraser and more. Tap a race for the course, weather, past results and how to register.
2027 Rocky Mountain Half Marathon & 5K · Estes Park, Colorado
2027 Runapalooza · Arvada, Colorado
2027 Georgetown To Idaho Springs Half Marathon · Georgetown, Colorado
2027 Byers Peak Stampede Half Marathon & 5K Run · Fraser, Colorado
2027 Mt. Sneffels Half Marathon & 10K · Ouray, Colorado
2T
2027 Thirsty 13 Half Marathon · Durango , Colorado