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.
By the numbers
The Biggest and Longest-Running
The September 5K races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
Common Questions About Running a September 5K in Kansas
When in September are most 5K races held?
The busiest weekend in Kansas is September 26 and September 27, with 17 5K races on those two days, and the single busiest day is Saturday, September 26 with 14. Every one of them is on a Saturday or a Sunday.
When should I sign up for a September 5K?
As early as you can. 3 of these September 5K races already have a price increase on the calendar, and 16 are open for entry right now. Another 1 have published an opening date and have not opened yet.
How much does a September 5K cost to enter?
The typical entry is $30, with paid entries running from $10 up to $45. 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 10 of these September 5K races with published results from past editions, the median finisher ran 39:40, and the median winning time was 20:33. So anything under 39:40 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 September 5K field?
The median one finished 175 runners, across the 10 of these September 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 1:08:39.
Are there trail 5K races in Kansas in September?
Yes, 2 races around Kansas get you off the pavement: 1 is a trail race, and 1 mixes road and trail. Surfaces are not always published, so it is worth checking a specific race before you register.
5K Races in Other Months
August and October sit either side of September, which is where most people look next when a date does not fit.