When in December are most 5K races held?
The busiest weekend in Colorado is December 12 and December 13, with 9 of them, 7 of those on Saturday, December 12. One more falls on a weekday, which is worth knowing if you are traveling for it.
Race calendar · December 2026 · Colorado
5K Races in Colorado in December 2026
Every 5K in Colorado in December 2026, all 20 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
What the field actually runs
December 5K Races, By the Numbers
35:58Median finish time
17:06Median winning time
335Median field size
10December 5K races with published results
How we calculate these stats: RunSesh calculates these figures from the most recent published results of past editions, sourced from RunSignup. We show aggregates only: field size, winning and median times, and the cutoff. We never publish individual finisher tables. Last updated Nov 12, 2026.
When in December
The December Race Weekends
5K 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 5K in Colorado, from the most recent published results.
Colorado 5K Races by City in December
All 5K Runs in Colorado in December
20 total Sat, Dec 5, 2026All-Out Fa La La Westminster, COFrom $50Details Sat, Dec 5, 2026Candy Cane Course - Colorado Springs Colorado Springs, COFrom $38Details Sat, Dec 5, 2026Chasing Santa 5k/Cycling Santa Toy Drive Colorado Springs, COFrom $40Details Sun, Dec 6, 2026Rock Canyon Half Marathon- 40th Anniversary Run! Pueblo, COFrom $35Details Sun, Dec 6, 2026Candy Cane Course - Denver Westminster, COFrom $40Details Sat, Dec 12, 2026YMCA Jingle Jog 5K Fountain, COFrom $40Details Sat, Dec 12, 2026Santa Catch 5k & 10k Windsor, COFrom $45Details Sat, Dec 12, 2026Superior Stocking Run Superior, COFrom $40Details Sat, Dec 12, 2026WinterFest 5k & Fun Run Thornton, COFrom $35Details Sat, Dec 12, 2026Santa Shuffle 5K Littleton, COFrom $40Details Sat, Dec 12, 2026Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $30Register Sat, Dec 12, 2026Sunrise Marathon 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $30Register Sun, Dec 13, 20262026 Jingle Bell Run - Colorado Denver, COFrom $50Details Sun, Dec 13, 2026Jolly Jog Fun Run/Walk Colorado Springs, COFrom $10Details Sat, Dec 19, 2026Santa's Dash for Ca$h Denver, COFrom $44Details Sat, Dec 19, 2026Sweaty Sweater 5k Fort Collins, COFrom $42Details Sun, Dec 20, 2026Ugly Sweater 5K Denver, COFrom $33Details Sat, Dec 26, 2026A Merry Christmas Run 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $30Register Sat, Dec 26, 2026New Year's Run 5K/10K/13.1 DENVER/AURORA Centennial, COFrom $30Register Thu, Dec 31, 2026Resolution Run - Fort Collins Fort Collins, CORegistration opens Nov 15From $25Details
Common Questions About Running a December 5K in Colorado
What is a good 5K time?
Across the 10 of these December 5K races with published results from past editions, the median finisher ran 35:58, and the median winning time was 17:06. So anything under 35:58 puts you in the faster half of a typical field. That is the middle of these RunSignup fields, walkers and charity entrants included, not a national average.
How big is a typical December 5K field?
The median one finished 335 runners, across the 10 of these December 5K races with published results from past editions. Most are far smaller than the big-city events people picture, which means less crowding at the start and a friendlier field, with a last recorded finisher at 1:12:19.
Are there trail 5K races in Colorado in December?
Yes, 3 races around Colorado get you off the pavement: 1 is a trail race, and 2 mix road and trail.