2015 - 2016 California Ultramarathon Calendar

Browse our Ultramarathon Calendar for races organized in California among 204 races.

204 races

Cuyamaca 100K Endurance Run

  • 2015-10-03
  • USA | California | Cuyamaca Rancho State Park
  • Ultramarathon - 100 kilometers
  • UTMB Qualifier Trail Western States Qualifier

Pacifica Summit Run 10K/Half Marathon/30K/50K

Pacifica Summit Run 50K
  • 2015-10-03
  • USA | California | San Pedro Valley State Park, Pacifica
  • Ultramarathon - 50 kilometers
  • Trail Urban Coyote Racing

Whoos in El Moro

Whoos in El Moro 50k
  • 2015-10-03
  • USA | California | Newport Beach
  • Ultramarathon - 50 kilometers
  • Hilly Trail

Widowmaker Trail Runs

Widowmaker Trail 50K Run
  • 2015-10-04
  • USA | California | El Cajon Wilderness
  • Ultramarathon - 50 kilometers
  • Trail

Dick Collins Firetrails 50

  • 2015-10-10
  • USA | California | Lake Chabot
  • Ultramarathon - 50 miles
  • Trail

Euchre Bar Massacre

Euchre Bar Massacre 50 M
  • 2015-10-10
  • USA | California | Foresthill
  • Ultramarathon - 50 miles
  • Trail Mountain

Skyline to the Sea Marathon & 50km

Skyline to the Sea 50km
  • 2015-10-10
  • USA | California | Saratoga Gap, Los Gatos
  • Ultramarathon - 50 kilometers
  • Trail Pacific Trail Runs

Boggs Mountain Boogie 50k

  • 2015-10-11
  • USA | California | Cobb
  • Ultramarathon - 50 kilometers
  • Trail Relay

Owen's Peak Marathon & 10 Miler Man vs Horse Trail Event

Owen's Peak Man vs Horse 50K Trail Adventure
  • 2015-10-11
  • USA | California | Inyokern
  • Ultramarathon - 50 kilometers
  • Hilly Trail

100 Mile Endurance Challenge

  • 2015-10-17
  • USA | California | Corona
  • Ultramarathon - 102 miles
  • Charity Road Running

100 Mile Endurance Challenge

EC 50
  • 2015-10-17
  • USA | California | Corona
  • Ultramarathon - 51.5 miles
  • Charity Road Running

Twin Peaks

Twin Peaks 50 km
  • 2015-10-17
  • USA | California | Corona
  • Ultramarathon - 50 kilometers
  • Trail Mountain

Twin Peaks

Twin Peaks 50 Miler
  • 2015-10-17
  • USA | California | Corona
  • Ultramarathon - 50 miles
  • Trail Mountain

Coyote Ridge Trail Run

Coyote Ridge 50 Km Trail Run
  • 2015-10-18
  • USA | California | Muir Beach
  • Ultramarathon - 50 kilometers
  • Hilly Trail Coastal Trail Runs

Ragnar Relay Napa Valley

  • 2015-10-23
  • USA | California | San Francisco
  • Ultramarathon - 186 miles
  • Relay Ragnar Relay Series