When in March are most 10K races held?
The busiest weekend in California is March 20 and March 21, with 14 of them, 13 of those on Saturday, March 20. One more falls on a weekday, which is worth knowing if you are traveling for it.
Race calendar · March 2027 · California
Every 10K in California in March 2027, all 40 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
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 Nov 12, 2026.
When in March
10K races are not spread evenly across March. 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 largest field of any March 10K in California, from the most recent published results.
The busiest weekend in California is March 20 and March 21, with 14 of them, 13 of those on Saturday, March 20. One more falls on a weekday, which is worth knowing if you are traveling for it.
Across the 11 of these March 10K races with published results from past editions, the median finisher ran 1:03:05, and the median winning time was 39:15. So anything under 1:03:05 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 105 runners, across the 11 of these March 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 1:55:50.
Yes, 3 races around California get you off the pavement: 1 is a trail race, and 2 mix road and trail.