When in August are most 5K races held?
The busiest weekend in California is August 21 and August 22, with 5 of them, 3 of those on Saturday, August 21. One more falls on a weekday, which is worth knowing if you are traveling for it.
Race calendar · August 2027 · California
5K Races in California in August 2027
Every 5K in California in August 2027, all 15 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
What the field actually runs
August 5K Races, By the Numbers
41:24Median finish time
17:52Median winning time
168Median field size
5August 5K 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 August
The August Race Weekends
5K races are not spread evenly across August. 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 Field
The largest field of any August 5K in California, from the most recent published results.
California 5K Races by City in August
All 5K Runs in California in August
15 total Sun, Aug 1, 2027Run LA 10 Miler Los Angeles, CAFrom $30Details Sun, Aug 1, 2027MAYEM - HYBRID 5K CHALLENGE Long Beach, CAFrom $55Details Thu, Aug 5, 2027Lanark Park HOME of The DRAGONS 5K Canoga Park, CAFrom $20Details Sat, Aug 7, 2027Green Valley Lake 5k/10k/& Half Marathon Green Valley Lake, CAFrom $40Details Sat, Aug 7, 2027Run Together Against Breast Cancer 5K/10K/13.1 Los Angeles, CAFrom $30Register Sun, Aug 8, 2027Sundae Funday - Ice Cream Run 5K, 10K, and Half Marathon Long Beach, CAFrom $39Details Sat, Aug 14, 2027Falcon 5K Pleasant Hill, CAFrom $50Details Sat, Aug 14, 2027Margaritaville Run San Diego Gaslamp 10K & 5K San Diego, CARegistration closedFrom $39Details Sun, Aug 15, 2027Heroes 4 Hearing 5K Long Beach, CAFrom $30Details Sat, Aug 21, 2027Idyllwild Race 5K / 10K Idyllwild, CAFrom $40Details Sat, Aug 21, 2027Walk for Water 5k Santa Barbara Santa Barbara, CAFrom $42Details Sat, Aug 21, 2027Coffee Lovers Run LOS ANGELES Los Angeles, CAFrom $30Register Sun, Aug 22, 2027Splash Dash 5k (& Dry Run 5k) at Wild Rivers in Irvine Irvine, CAFrom $40Details Sun, Aug 22, 2027Californian Dreamin 5K, 10K, & Half Marathon Long Beach, CAFrom $46Details Sat, Aug 28, 2027Night of the Running Dead 5K, 10K, 1 Miler, Half Marathon Long Beach, CAFrom $39Details
Common Questions About Running an August 5K in California
What is a good 5K time?
Across the 5 of these August 5K races with published results from past editions, the median finisher ran 41:24, and the median winning time was 17:52. So anything under 41:24 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 August 5K field?
The median one finished 168 runners, across the 5 of these August 5K 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 1:20:40.
Are there trail 5K races in California in August?
Yes, one race around California gets you off the pavement: 1 mixes road and trail.