Win your entry for the 100km run Biel in Switzeland

2015 - 2016 California Ultramarathon Calendar

Browse our Ultramarathon Calendar for races organized in California among 189 races.

189 races

Fort Ord Trail Run 50K

  • North America | USA | Pacific | California | Salinas
  • Ultramarathon - 50 kilometers
  • January 31, 2015 - 08:30
  • Inside Trail Racing Trail

Ordnance 100K

  • North America | USA | California | Fort Ord National Monument, Salinas
  • Ultramarathon - 100 kilometers
  • January 31, 2015 - 05:00
  • UTMB Qualifier Inside Trail Racing Trail

Jed Smith Ultra Classic - 50K

  • North America | USA | Pacific | California | Sacramento
  • Ultramarathon - 50 kilometers
  • February 07, 2015 - 08:30
  • Fast

Jed Smith Ultra Classic - 50 Miler

  • North America | USA | Pacific | California | Sacramento
  • Ultramarathon - 50 miles
  • February 07, 2015 - 07:30
  • Fast

Rancho San Juan Trail 50 km

  • North America | USA | California | Los Alamos
  • Ultramarathon - 50 kilometers
  • February 07, 2015 - 08:00
  • Trail

Sean O'Brian 100K Trail Run

  • North America | USA | Pacific | California | Malibu Creek State Park
  • Ultramarathon - 100 kilometers
  • February 07, 2015 - 05:00
  • Hilly Trail

Sean O'Brian 50K Trail Run

  • North America | USA | Pacific | California | Malibu Creek State Park
  • Ultramarathon - 50 kilometers
  • February 07, 2015 - 07:00
  • Hilly Trail

Sean O'Brian 50-Mile Trail Run

  • North America | USA | Pacific | California | Malibu Creek State Park
  • Ultramarathon - 50 miles
  • February 07, 2015 - 06:00
  • Hilly Trail

Sean O'Brien 50K

  • North America | USA | California | Malibu
  • Ultramarathon - 50 kilometers
  • February 07, 2015 - 07:00
  • Trail Mountain

Sean O'Brien 50M

  • North America | USA | California | Malibu
  • Ultramarathon - 50 miles
  • February 07, 2015 - 06:00
  • Trail Mountain

American Canyon 50K Ultramarathon

  • North America | USA | Pacific | California | Auburn
  • Ultramarathon - 50 kilometers
  • February 08, 2015 - 07:30
  • Trail

Bandit Ultra Trail Run 50K

  • North America | USA | Pacific | California | Corriganville Park, Simi Valley
  • Ultramarathon - 50 kilometers
  • February 15, 2015 - 07:00
  • Trail

Chabot Trail Run 50K

  • North America | USA | Pacific | California | Lake Chabot Regional Park
  • Ultramarathon - 50 kilometers
  • February 21, 2015 - 08:30
  • Inside Trail Racing Trail

FOURmidable 100K

  • North America | USA | Pacific | California | Cool
  • Ultramarathon - 100 kilometers
  • February 21, 2015 - 06:00
  • Trail

FOURmidable 50K

  • North America | USA | Pacific | California | Cool
  • Ultramarathon - 50 kilometers
  • February 21, 2015 - 06:00
  • Trail