Race calendar · May 2027 · California

May 2027 10K Races in California

Every 10K in California in May 2027, all 22 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.

22 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

1:06:40Median finish time
38:32Median winning time
256Median field size
8May 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 8 of them. Another 1 fall on a weekday.

  1. May 1 – May 23
  2. May 8 – May 98
  3. May 15 – May 165
  4. May 22 – May 232
  5. May 29 – May 303

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-running44th year44th Annual Providence Saint John's Health Center Brentwood Runannual tradition

May 10K Races by City

Long Beach 4Los Angeles 3Sacramento 2Arcata 1Berkeley 1Canoga Park 1Hemet 1Huntington Beach 1La Jolla 1San Diego 1San Dimas 1San Francisco 1San Jose 1Tuolumne 1Ventura 1Watsonville 1
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Soonest 10K Races in May

22 total
Sat, May 1, 2027Run, Fiesta, Repeat - Cinco de Mayo 5K, 10K, & Half Marathon Long Beach, CA5K10KHalf MarathonFrom $25Details Sun, May 2, 20272027 Avenue of the Giants Marathon Arcata, CAMarathonHalf Marathon10KFrom $60Details Sun, May 2, 2027May the 4th be with You- The Empire Strides Back 5K, 10K, & Half Marathon Long Beach, CA5K10KHalf Marathon1 MileFrom $25Details Sat, May 8, 2027Grizzly Peak Trail Run Berkeley, CA10KHalf Marathon30KMarathonFrom $60Details Sat, May 8, 2027Beer City Half™ Sacramento Sacramento, CAHalf Marathon10K5K1 MileFrom $25Details Sat, May 8, 2027Run for Chocolate 5k/10k/13.1 LOS ANGELES Los Angeles, CA5K10KHalf Marathon1 MileFrom $30Register Sat, May 8, 2027Run for Chocolate 5k/10k/13.1 SACRAMENTO Sacramento, CA5K10KHalf Marathon1 MileFrom $30Register Sat, May 8, 2027Run for Chocolate 5k/10k/13.1 SAN DIEGO San Diego, CA5K10KHalf Marathon1 MileFrom $30Register Sat, May 8, 2027Run for Chocolate 5k/10k/13.1 SAN FRANCISCO San Francisco, CA5K10KHalf Marathon1 MileFrom $30Register Sun, May 9, 202743rd Annual Mother's Day Run & Walk Watsonville, CA1K5K10KRegistration opens Oct 1From $30Details Sun, May 9, 2027Long Beach Mother's Day Bloom & Zoom 5K, 10K, Half Marathon Long Beach, CA5K10KHalf Marathon1 MileFrom $23Details Sat, May 15, 202714th Annual Luc's Run Tuolumne, CA10K2 Miles1KHalf MarathonFrom $36Details

Common Questions About Running a May 10K in California

When in May are most 10K races held?

The busiest weekend in California is May 8 and May 9, with 8 10K races on those two days, and the single busiest day is Saturday, May 8 with 6. Another 1 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. 12 of these May 10K races already have a price increase on the calendar, and 20 are open for entry right now. Another 2 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 $22.99 up to $60. 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 8 of these May 10K races with published results from past editions, the median finisher ran 1:06:40, and the median winning time was 38:32. So anything under 1:06:40 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 May 10K field?

The median one finished 256 runners, across the 8 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 2:14:01.

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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