Half marathons in California — October 2026

18 upcoming half marathons in California during October 2026.

Browse by state

All United StatesAlabamaAlaskaArizonaArkansasColoradoConnecticutDelawareFloridaGeorgiaHawaiiIdahoIllinois

Other months in California

JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberNovemberDecember

This calendar in numbers

This calendar currently lists 18 upcoming events, from Oct 3, 2026 to Oct 25, 2026. October is the busiest month, with 18 events scheduled. Events are spread across 14 different locations; San Jose hosts the most (3).