Race calendar · September 2027 · California
Every 10K in California in September 2027, all 7 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 September
10K races are not spread evenly across September. 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 September 10K races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
Across the 3 of these September 10K races with published results from past editions, the median finisher ran 1:06:30, and the median winning time was 39:10. So anything under 1:06:30 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 131 runners, across the 3 of these September 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 1:56:26.
Yes, one race around California gets you off the pavement: 1 mixes road and trail.
