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US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

1,076 races

Mountain Ultra

  • North America | USA | Mountain Region | Colorado | Aspen
  • Ultramarathon - 220 kilometers
  • August 01, 2014 - 00:00
  • Hilly Trail Beyond the Ultimate Mountain Extreme

Wild West Relay

  • North America | USA | Mountain Region | Colorado | Fort Collins
  • Ultramarathon - 200 miles
  • August 01, 2014
  • Road Running RLT Relay Races Relay

Angeles Crest 100 mile endurance run

  • North America | USA | Pacific | California | Wrightwood
  • Ultramarathon - 100 miles
  • August 02, 2014
  • Trail Western States Qualifier

Burning River 100 Mile Endurance Run

  • North America | USA | East North Central | Ohio | Willoughby Hills
  • Ultramarathon - 100 miles
  • August 02, 2014 - 05:00
  • Trail Midwest Grand Slam of Ultrarunning Western States Qualifier

Dahlgren Heritage Rail Trail 50 km

  • North America | USA | South Atlantic | Virginia | King George
  • Ultramarathon - 50 kilometers
  • August 02, 2014 - 06:30

Grand Ridge 50K Trail Run (August)

  • North America | USA | Pacific | Washington | Issaquah
  • Ultramarathon - 50 kilometers
  • August 02, 2014
  • Trail Evergreen Trail Runs

HURL Elkhorn 50 K Ultramarathon

  • North America | USA | Mountain Region | Montana | Montana City
  • Ultramarathon - 50 kilometers
  • August 02, 2014 - 07:00
  • Trail Mountain

HURL Elkhorn 50 Mile Ultramarathon

  • North America | USA | Mountain Region | Montana | Montana City
  • Ultramarathon - 50 miles
  • August 02, 2014 - 05:00
  • Trail Mountain

Moosalamoo Ultra - 36 M

  • North America | USA | Vermont | Goshen
  • Ultramarathon - 36 miles
  • August 02, 2014
  • Trail

On The Rocks Trail Run 45K

  • North America | USA | Pennsylvania | Rocky Ridge County Park, York
  • Ultramarathon - 45 kilometers
  • August 02, 2014 - 07:30

Ouray 100 Mile Endurance Run

  • North America | USA | Colorado | Ouray
  • Ultramarathon - 100 miles
  • August 02, 2014 - 04:00
  • Trail Mountain Ever Run Racing

Salt Point 50 km

  • North America | USA | California | Salt Point State Park, Jenner
  • Ultramarathon - 50 kilometers
  • August 02, 2014 - 08:30
  • Trail Pacific Trail Runs

San Francisco 100 Mile Endurance Run

  • North America | USA | Pacific | California | Rodeo Beach, Golden Gate National Recreation, CA
  • Ultramarathon - 100 miles
  • August 02, 2014 - 07:00
  • Hilly Costal Trail Runs Trail

San Francisco 50 Mile Endurance Run

  • North America | USA | Pacific | California | Rodeo Beach, Golden Gate National Recreation, CA
  • Ultramarathon - 50 miles
  • August 02, 2014 - 07:00
  • Hilly Costal Trail Runs Trail

Skyline 50K

  • North America | USA | California | Lake Chabot Marina
  • Ultramarathon - 50 kilometers
  • August 03, 2014
  • Hilly Trail