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Ultra Marathons found in California in December
View all ↓Ultra Marathons in California in December 2025
Find A Race is the US's favourite event listings site. Check out our list of December 2025 Ultra Marathons in California below.
Race Calendar: Ultra Marathons found in December
🚀Boosted
Tahoe to Malibu Annual Challenge
Anywhere, California
Mon 01 Jan 24 - Wed 31 Dec 25
$53.75
🚀Boosted
San Joaquin River Trail 10k/25k/50k
Friant, California
Sat 06 Dec 25
$54.00 - $149.40
Feature your event at the top of the results
San Joaquin River Trail 10k/25k/50k
Friant, California
Sat 06 Dec 25
$54.00 - $149.40
Tahoe to Malibu Annual Challenge
Anywhere, California
Mon 01 Jan 24 - Wed 31 Dec 25
$53.75
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