Race calendar · May 2027
182 Half Marathon races across the US in May 2027, sorted by date. Which weekends are busiest, what the fields actually run, entry fees, and where each one starts.
182 Half Marathon races in May 2027
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.
When in May
Half Marathon races do not spread evenly across May. The busiest weekend is May 8 and May 9, with 55 of them. Another 4 fall on a weekday.
By the numbers
The May Half Marathon races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
It is a lean month for the Half Marathon. May carries 182, against 523 in October and 56 in August, the quietest. A May race is worth planning around rather than picking late, because the one that fits your training block may be the only one within reach.
The busiest weekend is May 8 and May 9, with 55 Half Marathon races on those two days, and the single busiest day is Saturday, May 8 with 45. Another 4 fall on a weekday, which is worth knowing if you are traveling for one.
As early as you can. 72 of these May Half Marathon races already have a price increase on the calendar, and 168 are open for entry right now. Another 14 have published an opening date and have not opened yet.
The typical entry is $30, with paid entries running from $5 up to $113. Entry fees climb as race day gets closer, so the same race is usually cheapest the week it opens.
Across the 102 of these May Half Marathon races with published results from past editions, the median finisher ran 2:13:22, and the median winning time was 1:25:39. So anything under 2:13:22 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 82 runners, across the 102 of these May 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 3:29:24.
Texas has 27, California has 19, Florida has 13, Kentucky has 8, Missouri has 8. If you are willing to travel, those are the states where a May weekend gives you the most to choose from.
Yes, 10 races around the United States get you off the pavement: 8 are trail races, and 2 mix road and trail. Surfaces are not always published, so it is worth checking a specific race before you register.
April and June sit either side of May, which is where most people look next when a date does not fit.
