CO · December 2026
Half Marathons in Colorado in December
6 half marathons in Colorado are on the calendar for December 2026, in Westminster, Pueblo, Centennial. Tap a race for the course, weather, past results and how to register.
All-Out Fa La La · Westminster, Colorado
Rock Canyon Half Marathon- 40th Anniversary Run! · Pueblo, Colorado
Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA · Centennial, Colorado
Sunrise Marathon 5K/10K/13.1 DENVER/AURORA · Centennial, Colorado
A Merry Christmas Run 5K/10K/13.1 DENVER/AURORA · Centennial, Colorado
New Year's Run 5K/10K/13.1 DENVER/AURORA · Centennial, Colorado