US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

1,277 races

Carl Touchstone Mississippi Trail Runs

Carl Touchstone Mississippi Trail 50 K

  • March 07, 2015
  • North America | USA | East South Central | Mississippi | De Soto National Forest
  • Ultramarathon - 50 kilometers
  • Trail

Carl Touchstone Mississippi Trail Runs

Carl Touchstone Mississippi Trail 50 Mile

  • March 07, 2015
  • North America | USA | East South Central | Mississippi | De Soto National Forest
  • Ultramarathon - 50 miles
  • Trail

Cross Florida Route 40 Romp

  • March 07, 2015 - 07:30
  • North America | USA | Florida | Yankeetown
  • Ultramarathon - 116 miles
  • Road Running

Cross Florida Route 40 Romp

Cross Florida Route 40 Romp - 2 Person Relay

  • March 07, 2015 - 07:30
  • North America | USA | Florida | Yankeetown
  • Ultramarathon - 116 miles
  • Road Running Relay

Delano Park

Delano Park 50 Mile Solo

  • March 07, 2015
  • North America | USA | East South Central | Alabama | Decatur
  • Ultramarathon - 50 miles
  • Relay

Deo 25K/50K

Deo 50K

  • March 07, 2015
  • North America | USA | California | Griffith Park, Los Angeles
  • Ultramarathon - 50 kilometers

Dances with Dirt Green Swamp

DWD Green Swamp 50K

  • March 07, 2015 - 07:00
  • North America | USA | South Atlantic | Florida | Dade City
  • Ultramarathon - 50 kilometers
  • Flat Trail RunningFit

Dances with Dirt Green Swamp

DWD Green Swamp 50M

  • March 07, 2015 - 05:30
  • North America | USA | South Atlantic | Florida | Dade City
  • Ultramarathon - 50 miles
  • Flat Trail RunningFit

Graveyard 100

Graveyard 100K Ultramarathon

  • March 07, 2015
  • North America | USA | South Atlantic | North Carolina | Bodie Island
  • Ultramarathon - 100 kilometers
  • North Carolina Ultra Series

Graveyard 100

Graveyard 100 Mile Ultramarathon

  • March 07, 2015
  • North America | USA | South Atlantic | North Carolina | Corolla
  • Ultramarathon - 100 miles
  • North Carolina Ultra Series

Green Jewel 50K Fun Run

  • March 07, 2015 - 07:00
  • North America | USA | East North Central | Ohio | Rocky River
  • Ultramarathon - 50 kilometers
  • Relay Western Reserve Racing

Lenape Trail Run

  • March 07, 2015
  • North America | USA | New Jersey | Millburn
  • Ultramarathon - 34 miles
  • Trail

Nueces 50 Miler Enduance Trail

Nueces 50K Endurance Trail

  • March 07, 2015 - 07:00
  • North America | USA | West South Central | Texas | Rocksprings
  • Ultramarathon - 50 kilometers
  • Trail Tejas Trails

Nueces 50 Miler Enduance Trail

Nueces 50 Miler

  • March 07, 2015 - 06:00
  • North America | USA | West South Central | Texas | Rocksprings
  • Ultramarathon - 50 miles
  • Tejas Trails

Old Man 50

Old Man 52K

  • March 07, 2015
  • North America | USA | Arizona | Scottsdale
  • Ultramarathon - 52 kilometers
  • Trail