December ultra marathons in California, United States
9 races
Calero Trail Run
Dec 6, 2025 (Sat)
San Jose, California, United States
1.3
$131
50K
Ray Miller 50/50
Dec 6, 2025 (Sat)
Malibu, California, United States
1.2 - 1.7
$216.5 - $323
50K
50mi
High Desert 50K
Dec 6, 2025 (Sat)
Ridgecrest, California, United States
1
50K
Anza Borrego Cuyamaca 50 Mile Run
Dec 6, 2025 (Sat)
Julian, California, United States
1.7
50mi
San Joaquin River Trail
Dec 6, 2025 (Sat)
Friant, California, United States
2
50K
100K
Hunter S. Thompson Fear & Loathing
Dec 7, 2025 (Sun)
San Francisco, California, United States
1.8
50K
50mi
Doomsday
Dec 13, 2025 (Sat)
Cool, California, United States
1.5
$115
50K
Paramount Ranch Trail Runs
Dec 20, 2025 (Sat)
Agoura Hills, California, United States
1.2
50K
New Year's One Day
Dec 31, 2025 (Wed)
San Jose, California, United States
2.3
$100 - $120
50mi
100mi
6h
12h
24h
Showing 1 - 9 of 9 events