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Discover The Best California Ultramarathons

Explore our comprehensive list of ultramarathons in California to find the perfect race for you.

upcoming ultramarathons in California

San Lorenzo River Trail Run
July 11, 2026
/
Santa Cruz
Skyline 50K Endurance Run
August 2, 2026
/
Castro Valley
Redwood (Summer) Trail Run
August 15, 2026
/
Oakland
Diablo Trail Run
September 6, 2026
/
Walnut Creek
Mendocino Running Festival
September 11, 2026
/
Mendocino
Berkeley Trail Adventure
September 12, 2026
/
Berkeley
Mammoth Trail Fest
September 25, 2026
/
Mammoth Lakes
Kodiak Ultra Marathons
October 8, 2026
/
Sunset & Cider Trail Races
October 10, 2026
/
Auburn
Bizz Johnson
October 11, 2026
/
Lake Tahoe Marathon
October 16, 2026
/
Lake Tahoe
San Diego 50 & Trail Runs
January 9, 2027
/
San Diego
See all Ultras →

featured events

Yakima River Canyon Marathon and Half-Marathon
Mar 28, 2026
/
Yakima
Corvallis Half Marathon & 5K
Apr 11, 2026
/
Corvallis
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