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US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

1,109 races

Fort Ord Trail Run 50K

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

Frozen Dead Guy 50km

  • North America | USA | Colorado | Nederland
  • Ultramarathon - 50 kilometers
  • January 31, 2015 - 07:30
  • Snow Trail Mountain

Lake Youngs NUTS 50K Run

  • North America | USA | Pacific | Washington | Lake Youngs Watershed
  • Ultramarathon - 50 kilometers
  • January 31, 2015 - 07:30
  • Trail

North Carolina Fat Ass 50k

  • North America | USA | South Atlantic | North Carolina | Fort Bragg
  • Ultramarathon - 50 kilometers
  • January 31, 2015 - 08:00
  • 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

Rocky Raccoon 100 Mile

  • North America | USA | West South Central | Texas | Huntsville
  • Ultramarathon - 100 miles
  • January 31, 2015 - 06:00
  • Trail Tejas Trails Western States Qualifier

Rocky Raccoon 50 Mile

  • North America | USA | West South Central | Texas | Huntsville
  • Ultramarathon - 50 miles
  • January 31, 2015 - 07:00
  • Trail Tejas Trails

Run for Regis 50K

  • North America | USA | East North Central | Ohio | Cuyahoga Valley National Park
  • Ultramarathon - 50 kilometers
  • January 31, 2015 - 07:30
  • Trail

Skydive Ultra 100M Run

  • North America | USA | Florida | Clewiston
  • Ultramarathon - 100 miles
  • January 31, 2015

Skydive Ultra 50 km Run

  • North America | USA | Florida | Clewiston
  • Ultramarathon - 50 kilometers
  • January 31, 2015

Skydive Ultra 50M Run

  • North America | USA | Florida | Clewiston
  • Ultramarathon - 50 miles
  • January 31, 2015

Snowshoe Festival 50K

  • North America | USA | Mountain Region | Utah | Midway
  • Ultramarathon - 50 kilometers
  • January 31, 2015 - 08:00
  • Snow

Winter Festival Goat 50K

  • North America | USA | West South Central | Texas | San Antonio
  • Ultramarathon - 50 kilometers
  • January 31, 2015
  • Fast Walk Flat Fun Road Running Trail

Winter Festival Goat 50 Mile

  • North America | USA | West South Central | Texas | San Antonio
  • Ultramarathon - 50 miles
  • January 31, 2015
  • Fast Walk Flat Fun Road Running Trail

Ragnar Relay Florida Keys

  • North America | USA | South Atlantic | Florida | Miami
  • Ultramarathon - 199 miles
  • February 06, 2015
  • Charity Relay Ragnar Relay Series