When in May are most 10K races held?
The busiest weekend in California is May 8 and May 9, with 10 of them, 8 of those on Saturday, May 8. One more falls on a weekday, which is worth knowing if you are traveling for it.
Race calendar · May 2027 · California
10K Races in California in May 2027
Every 10K in California in May 2027, all 30 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
What the field actually runs
May 10K Races, By the Numbers
1:06:40Median finish time
37:53Median winning time
230Median field size
11May 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 Nov 12, 2026.
When in May
The May Race Weekends
10K races are not spread evenly across May. Here is how the calendar actually falls, weekend by weekend, which is the part worth knowing before you book a trip or plan a taper around one.
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.
California 10K Races by City in May
All 10K Runs in California in May
30 total Sat, May 1, 20272027 Abrazo 5K Walk & 10K Run San Ysidro, CAFrom $65Details Sat, May 1, 2027Run, Fiesta, Repeat - Cinco de Mayo 5K, 10K, & Half Marathon Long Beach, CAFrom $36Details Sun, May 2, 20272027 Avenue of the Giants Marathon Arcata, CAFrom $60Details Sun, May 2, 2027May the 4th be with You- The Empire Strides Back 5K, 10K, & Half Marathon Long Beach, CAFrom $53Details Sat, May 8, 2027Grizzly Peak Trail Run (Postponed until 2028) Berkeley, CAFrom $60Details Sat, May 8, 2027Lynwood 5K/10K Run Lynwood, CAFrom $35Details Sat, May 8, 2027Beer City Half™ Sacramento Sacramento, CAFrom $65Details Sat, May 8, 2027City Impact's 17th Annual BEACHFRONT RUN Ventura, CAFrom $65Details Sat, May 8, 2027Run for Chocolate 5k/10k/13.1 LOS ANGELES Los Angeles, CAFrom $42Register Sat, May 8, 2027Run for Chocolate 5k/10k/13.1 SACRAMENTO Sacramento, CAFrom $42Register Sat, May 8, 2027Run for Chocolate 5k/10k/13.1 SAN DIEGO San Diego, CAFrom $42Register Sat, May 8, 2027Run for Chocolate 5k/10k/13.1 SAN FRANCISCO San Francisco, CAFrom $42Register Sun, May 9, 202743rd Annual Mother's Day Run & Walk Watsonville, CAFrom $30Details Sun, May 9, 2027Long Beach Mother's Day Bloom & Zoom 5K, 10K, Half Marathon Long Beach, CAFrom $47Details Sat, May 15, 202714th Annual Luc's Run Tuolumne, CAFrom $36Details Sat, May 15, 2027NURSES ROCK Run/Walk San Dimas, CAFrom $55Details Sat, May 15, 2027La Jolla Half Marathon, 10K, & 5K La Jolla, CAFrom $100Details Sat, May 15, 2027Jed & Ted’s Bill & Ted’s Excellent Race 5K & 10K Canoga Park, CAFrom $35Details Sun, May 16, 2027Whittier Narrows Spring Running Festival South El Monte, CAFrom $39Details Sun, May 16, 2027La Noche de La Llorona Run SummerWeen Series 5K 10K Half Long Beach, CAFrom $53Details Sat, May 22, 2027SoCal's Pirate's 5k/10k Run/Walk Huntington Beach, CAFrom $45Details Sun, May 23, 2027The Great Benicia Run: Strait to the Finish Benicia, CARegistration opens Nov 23From $35Details Sat, May 29, 2027Beer City Half™ San Jose San Jose, CAFrom $73Details Sat, May 29, 2027SuperHeroes Run LOS ANGELES Los Angeles, CAFrom $42Register Sat, May 29, 2027SuperHeroes Run LAS VEGAS Las Vegas, CAFrom $42Register Sat, May 29, 2027SuperHeroes Run SACRAMENTO Sacramento, CAFrom $42Register Sat, May 29, 2027SuperHeroes Run SAN DIEGO San Diego, CAFrom $42Register Sat, May 29, 2027SuperHeroes Run SAN FRANCISCO San Francisco, CAFrom $42Register Sun, May 30, 202744th Annual Providence Saint John's Health Center Brentwood Run Los Angeles, CAFrom $40Details Mon, May 31, 2027Memorial Day 5K, 10K & Kids 1 Mile Run/Walk Hemet, CAFrom $50Details
Common Questions About Running a May 10K in California
What is a good 10K time?
Across the 11 of these May 10K races with published results from past editions, the median finisher ran 1:06:40, and the median winning time was 37:53. 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 230 runners, across the 11 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 1:55:05.