Find My Ultra

100K races in California

The 25 100K ultramarathons in California, with each one's climb, cutoff and date. Every race links to its own page, where you can see how it fits the runner you are now.

RaceDistanceWhereDateClimbCutoff
Dick Collins Firetrails 50 Mile100 KMCastro Valley, CASep 26, 202610,400 ft16.5 h
Cuyamaca 100 km Endurance Run100 KMJulian, CAOct 3, 20269,000 ft19 h
Kodiak Ultra Marathons100 KMBig Bear Lake, CAOct 10, 202610,000 ft20 h
California Fall Classic 100K and100 KMHealdsburg, CAOct 17, 202613,848 ft19 h
Island View - Endurance Run100 KMGoleta, CAOct 24, 202616,600 ft24 h
Operation OCALI69 MilesMalibu, CANov 20, 202613,000 ft36 h
Coyote Cohorts Backbone Trail Ultra68 MilesSanta Monica Mountains, CAJan 16, 202712,628 ft26 h
Sean O'Brien 100K/50M 26.2/30K100 KMCalabasas, CAJan 30, 202713,179 ft19 h
Happy Chinese New Year 100 km Race100 KMSan Diego, CAFeb 20, 2027—19 h
SoCalUltraTrail at Tejon Ranch100 KMLebec, CAFeb 27, 202711,903 ft18 h
Sycamore Canyon100 KMPoway, CAFeb 27, 20278,800 ft17 h
Lake Sonoma 100K100 KMHealdsburg, CAApr 10, 2027—19 h
Leona Divide Run100 KMLake Hughes, CAApr 17, 20279,767 ft17 h
Canyons Endurance Runs100 KMAuburn, CAApr 24, 202712,303 ft19 h
Machete Trail Madness 100k100 KMPerris, CAApr 24, 202713,200 ft15 h
Coyote Two Moon Ultras100 KMOjai, CAApr 30, 202716,431 ft26 h
Miwok100 KM 2012+ Modern CourseStinson Beach, CAMay 1, 202711,000 ft19 h
Santa Clarita Trail Race100 KMSanta Clarita, CAMay 1, 202712,863 ft23 h
Quicksilver100 KMSan Jose, CAMay 8, 202712,701 ft17 h
Bishop High Sierra100 KMBishop, CAMay 15, 2027—19 h
Malibu Canyon Trail Races100 KMMalibu, CAJun 5, 202710,446 ft17.5 h
Cool Moon Trail Runs100 KMCool, CAJun 12, 20279,000 ft19 h
Orange Curtain100 KMCerritos, CAJun 18, 2027—19 h
Lost Sierra Endurance Race100 KMDownieville, CAJul 24, 202710,780 ft20 h
Run-de-Vous100 KMSan Martin, CAAug 27, 2027—19 h