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Ultra Marathons found in California in May

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Ultra Marathons in California in May 2025

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

Race Calendar: Ultra Marathons found in May

Miwok 100K

Stinson Beach, California
06 Jan 25 - 03 May 25
$150.00 - $450.00

Hollywood to the Sea

Los Angeles, California
03 May 25
$500.00

Grizzly Peak Trail Run

Berkeley, California
10 May 25
Free - $85.80
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