10K races in California — September 2026
38 upcoming 10K races in California during September 2026.
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This calendar in numbers
This calendar currently lists 38 upcoming events, from Sep 5, 2026 to Sep 27, 2026. September is the busiest month, with 38 events scheduled. Events are spread across 28 different locations; San Diego hosts the most (4). Course distances range from 4 km to 10 km.