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Ultra Marathons found in California in October

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Ultra Marathons in California in October 2025

Find A Race is the US's favourite event listings site. Check out our list of October 2025 Ultra Marathons in California below.

Race Calendar: Ultra Marathons found in October

🚀Boosted

Ruth Anderson Memorial Endurance Run

San Francisco, California
11 Oct 25
Free
🚀Boosted

Finish The Ride and Finish The Run Santa Clarita

Valencia, California
26 Oct 25
$11.60 - $96.40
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Ruth Anderson Memorial Endurance Run

San Francisco, California
11 Oct 25
Free

Finish The Ride and Finish The Run Santa Clarita

Valencia, California
26 Oct 25
$11.60 - $96.40

Malibu to Tahoe Annual Challenge

Anywhere, California
01 Jan 24 - 31 Dec 25
$53.75

Pinkathon 2025 Virtual and In-Person Challenge for Breast Cancer!

Any Place in the World!, California
01 May 25 - 31 Oct 25
Free - $27.50

Cycle of Hope

Dublin, California
19 Oct 25
$10.00 - $100.00
Showing 1-5 of 5 results