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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

Tahoe to Malibu Annual Challenge

Anywhere, California
Mon 01 Jan 24 - Wed 31 Dec 25
$53.75
🚀Boosted

5th Annual Dia de los Muertos 75 Mile Challenge!

livermore, California
Sat 13 Sep 25 - Sun 02 Nov 25
$32.80 - $54.00
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Tahoe to Malibu Annual Challenge

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

5th Annual Dia de los Muertos 75 Mile Challenge!

livermore, California
Sat 13 Sep 25 - Sun 02 Nov 25
$32.80 - $54.00
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