Race calendar · May 2027

May 2027 10K Races in the United States

203 10K 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.

203 10K races in May 2027

5K in MayHalf Marathon in MayMarathon in MayUltra in May

What the field actually runs

May 10K Races, By the Numbers

1:05:07Median finish time
40:37Median winning time
65Median field size
120May 10K races with published results

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

The May Race Weekends

10K races do not spread evenly across May. The busiest weekend is May 8 and May 9, with 61 of them. Another 10 fall on a weekday.

  1. May 1 – May 247
  2. May 8 – May 961
  3. May 15 – May 1636
  4. May 22 – May 2324
  5. May 29 – May 3025

By the numbers

The Biggest and Longest-Running

The May 10K races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.

Largest field4,760 finishersLa Jolla Half Marathon, 10K, & 5Kin the Half MarathonLongest-running52nd year52nd Annual Marigold 10Kannual tradition

May 10K Races by State

Texas 29Florida 25California 22Missouri 10Illinois 9Washington 8Iowa 7Kentucky 7Georgia 6Michigan 6Colorado 5North Carolina 5Ohio 5Pennsylvania 5Tennessee 5Nebraska 4Alabama 3Arkansas 3Minnesota 3New Jersey 3New York 3Oklahoma 3Arizona 2Delaware 2Idaho 2Maryland 2Oregon 2South Carolina 2Utah 2Virginia 2Wisconsin 2Connecticut 1District of Columbia 1Hawaii 1Indiana 1Kansas 1Maine 1Nevada 1New Mexico 1Rhode Island 1

May 10K Races by City

San Antonio, TX 5Dallas, TX 4Long Beach, CA 4Bowling Green, KY 3Fort Worth, TX 3Houston, TX 3Kansas City, MO 3Los Angeles, CA 3Austin, TX 2Bettendorf, IA 2Byron, IL 2Camden, NJ 2Chicago, IL 2Columbus, OH 2DeBary, FL 2Deland, FL 2Des Moines, IA 2Gadsden, AL 2
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Soonest 10K Races in May

203 total
Sat, May 1, 2027Kirby Derby Monticello, IL10K5KRegistration opens Jan 1, 2027From $25Details Sat, May 1, 2027Knock On Wood Trail Run/Hike - 13.1 & 10k Marietta, SCHalf Marathon10KFrom $35Details Sat, May 1, 2027IronHorse - USATF Certified & Sanctioned Riceville, IAMarathonHalf Marathon10K5KFrom $15Details Sat, May 1, 2027Byron Rocks 5k & 10k - Run it. Walk it. Ruck it. Byron, IL5K10KFrom $40Details Sat, May 1, 2027May The Course Be With You Greensboro, NC10K5K1 MileFrom $20Details Sat, May 1, 2027May the Fourth Race Half Marathon, 10K, 5K Farmington, UT5K10KHalf MarathonFrom $40Details Sat, May 1, 2027Des Moines Women's Half Marathon, 10K & 5K Des Moines, IAHalf Marathon10K5K10KFrom $45Details Sat, May 1, 2027Northern Illinois Food Bank's Fight Hunger 5K I 10K I 1-Mile Wheaton, IL10K5K1 MileFrom $30Details Sat, May 1, 2027AIMHigh-Keep Pressing 5K/10K/13.1M Henderson, NC5K10KHalf MarathonFrom $25Details Sat, May 1, 2027Turtle Crawl 2027 Jekyll Island, GA10K5KFrom $25Details Sat, May 1, 2027Great Allegheny Ohiopyle Marathon Race Festival: Marathon, Half Marathon, 10K and 5K Ohiopyle, PAMarathonHalf Marathon5K10KFrom $40Details Sat, May 1, 2027MoCo CARES Charity Race Gaithersburg, MD10K5K1 MileFrom $25Details

Common Questions About Running a May 10K

Is May a good month for a 10K?

It is a lean month for the 10K. May carries 203, against 694 in October and 92 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.

When in May are most 10K races held?

The busiest weekend is May 8 and May 9, with 61 10K races on those two days, and the single busiest day is Saturday, May 8 with 49. Another 10 fall on a weekday, which is worth knowing if you are traveling for one.

When should I sign up for a May 10K?

As early as you can. 83 of these May 10K races already have a price increase on the calendar, and 179 are open for entry right now. Another 23 have published an opening date and have not opened yet.

How much does a May 10K cost to enter?

The typical entry is $30, with paid entries running from $10 up to $64. Entry fees climb as race day gets closer, so the same race is usually cheapest the week it opens.

What is a good 10K time?

Across the 120 of these May 10K races with published results from past editions, the median finisher ran 1:05:07, and the median winning time was 40:37. So anything under 1:05:07 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 May 10K field?

The median one finished 65 runners, across the 120 of these May 10K 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 1:47:23.

Which states have the most May 10K races?

Texas has 29, Florida has 25, California has 22, Missouri has 10, Illinois has 9. If you are willing to travel, those are the states where a May weekend gives you the most to choose from.

Are there trail 10K races in May?

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.

10K Races in Other Months

April and June sit either side of May, which is where most people look next when a date does not fit.

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