Race calendar · September 2026 · Michigan
Every Half Marathon in Michigan in September 2026, all 10 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
10 Half Marathon races in September 2026
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 Sep 22, 2026.
By the numbers
The September Half Marathon races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
The busiest weekend in Michigan is September 26 and September 27, with 10 Half Marathon races on those two days, and the single busiest day is Saturday, September 26 with 7. Every one of them is on a Saturday or a Sunday.
As early as you can. 3 of these September Half Marathon races already have a price increase on the calendar, and 10 are open for entry right now.
The typical entry is $35, with paid entries running from $10 up to $55. Entry fees climb as race day gets closer, so the same race is usually cheapest the week it opens.
Across the 3 of these September Half Marathon races with published results from past editions, the median finisher ran 2:09:45, and the median winning time was 1:16:12. So anything under 2:09:45 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 295 runners, across the 3 of these September Half Marathon 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 3:27:15.
Yes, one race around Michigan gets you off the pavement: 1 is a trail race. Surfaces are not always published, so it is worth checking a specific race before you register.
August and October sit either side of September, which is where most people look next when a date does not fit.
