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 Sep 22, 2026.
When in November
The November Race Weekends
5K races do not spread evenly across November. The busiest weekend is November 7 and November 8, with 7 of them. Another 16 fall on a weekday.
Oct 31 – Nov 14
Nov 7 – Nov 87
Nov 14 – Nov 157
Nov 21 – Nov 223
Nov 28 – Nov 292
By the numbers
The Biggest and Longest-Running
The November 5K races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
Common Questions About Running a November 5K in Colorado
When in November are most 5K races held?
The busiest weekend in Colorado is November 7 and November 8, with 7 5K races on those two days, and the single busiest day is Thursday, November 26 with 15. Another 16 fall on a weekday, which is worth knowing if you are traveling for one.
When should I sign up for a November 5K?
As early as you can. 25 of these November 5K races already have a price increase on the calendar, and 36 are open for entry right now. Another 3 have published an opening date and have not opened yet.
How much does a November 5K cost to enter?
The typical entry is $30, with paid entries running from $5 up to $55. Entry fees climb as race day gets closer, so the same race is usually cheapest the week it opens.
What is a good 5K time?
Across the 24 of these November 5K races with published results from past editions, the median finisher ran 38:26, and the median winning time was 16:57. So anything under 38:26 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 November 5K field?
The median one finished 439 runners, across the 24 of these November 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 1:20:52.
Are there trail 5K races in Colorado in November?
Yes, 2 races around Colorado get you off the pavement: 2 are trail races. Surfaces are not always published, so it is worth checking a specific race before you register.
5K Races in Other Months
October and December sit either side of November, which is where most people look next when a date does not fit.