California · October
October Races in California
Find races in California taking place in October. Compare dates, locations, distances and registration information. Explore 42 race with a confirmed dates.
- Upcoming, date confirmed
- 42
- Active listings
- 180
Nearby months
Browse California races by distance
Races in nearby states
Guides from the RaceRove blog
- 8 min read How to Choose the Best Half Marathon for a PR, Racecation or 50-State Challenge The best half marathon depends on what you want from it. How to choose a course for a personal record, a race worth travelling for, or an efficient stop on a 50-state challenge.
- 4 min read Diplo's Run Club 2026-27: Every City, Date and Course Diplo's Run Club is a 5K with a post-race concert. Every US date for 2026-27 (San Francisco, New York, Los Angeles, San Diego and Phoenix), start times and courses.
- 8 min read How to Choose Your First Marathon A practical checklist for choosing a first marathon based on course, weather, cutoff, travel, field size and support.
- Blog All guides Planning advice for finding, choosing and travelling to races.
October Races in California: common questions
- How many races are there in California in October?
- RaceRove currently lists 42 upcoming races in California in October with a confirmed date, plus 138 annual events usually held that month whose next date hasn't been announced yet.
- What is the biggest race in California in October?
- By estimated field size, the largest event is the Mission Inn Run, with about 33,976 runners across all of its distances.
Search every race in California
Filter by month, distance, course profile and field size, save races to a shortlist and compare them side by side in the interactive search.