When in January are most 5K races held?
The busiest weekend in Colorado is January 9 and January 10, with 3 of them. Another 3 fall on a weekday, which is worth knowing if you are traveling for one.
Race calendar · January 2027 · Colorado
Every 5K in Colorado in January 2027, all 16 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
What the field actually runs
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 January
5K races are not spread evenly across January. 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 largest field of any January 5K in Colorado, from the most recent published results.
The busiest weekend in Colorado is January 9 and January 10, with 3 of them. Another 3 fall on a weekday, which is worth knowing if you are traveling for one.
Across the 7 of these January 5K races with published results from past editions, the median finisher ran 34:22, and the median winning time was 18:49. So anything under 34:22 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.
The median one finished 153 runners, across the 7 of these January 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 1:05:36.