When in December are most 10K races held?
The busiest weekend in Colorado is December 5 and December 6, with 3 of them, 2 of those on Saturday, December 5. Every one of them is on a Saturday or a Sunday.
Race calendar · December 2026 · Colorado
10K Races in Colorado in December 2026
Every 10K in Colorado in December 2026, all 8 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
When in December
The December Race Weekends
10K races are not spread evenly across December. Here is how the calendar actually falls, weekend by weekend, which is the part worth knowing before you book a trip or plan a taper around one.
By the numbers
The Biggest Field
The largest field of any December 10K in Colorado, from the most recent published results.
Colorado 10K Races by City in December
All 10K Runs in Colorado in December
8 total Sat, Dec 5, 2026All-Out Fa La La Westminster, COFrom $60Details Sat, Dec 5, 2026Candy Cane Course - Colorado Springs Colorado Springs, COFrom $38Details Sun, Dec 6, 2026Candy Cane Course - Denver Westminster, COFrom $40Details Sat, Dec 12, 2026Santa Catch 5k & 10k Windsor, COFrom $55Details Sat, Dec 12, 2026Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $42Register Sat, Dec 12, 2026Sunrise Marathon 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $42Register Sat, Dec 26, 2026A Merry Christmas Run 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $45Register Sat, Dec 26, 2026New Year's Run 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $45Register
Common Questions About Running a December 10K in Colorado
Are there trail 10K races in Colorado in December?
Yes, 2 races around Colorado get you off the pavement: 1 is a trail race, and 1 mixes road and trail.