US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

989 races

  • Cures for Colors 100 Mile Run/Walk

    • North America | USA | North Carolina | Goldsboro
    • Ultramarathon - 100 miles
    • April 25, 2014
    • Charity Road Running Relay
  • Salt Flats 100

    • North America | USA | Mountain Region | Utah | Wendover
    • Ultramarathon - 100 miles
    • April 25, 2014 - 07:00
    • Trail
  • Capitol Peak Ultra Marathon - 50 mile

    • North America | USA | Pacific | Washington | Capitol State Forest
    • Ultramarathon - 50 miles
    • April 26, 2014 - 06:00
    • Trail
  • Capitol Peak Ultra Marathon - 55 km

    • North America | USA | Pacific | Washington | Capitol State Forest
    • Ultramarathon - 55 kilometers
    • April 26, 2014 - 06:00
    • Trail
  • Cheyenne Mtn. Trail 50K Race

    • North America | USA | Mountain Region | Colorado | Cheyenne Mountain State Park
    • Ultramarathon - 50 kilometers
    • April 26, 2014
    • Trail Fast
  • Chippewa 50K Trail Run

    • North America | USA | East North Central | Wisconsin | New Auburn
    • Ultramarathon - 50 kilometers
    • April 26, 2014 - 08:00
    • Trail
  • C&O Canal 100

    • North America | USA | South Atlantic | Maryland | Camp Manidokan
    • Ultramarathon - 100 miles
    • April 26, 2014 - 07:00
  • Earth Day 50K Trail Race

    • North America | USA | Illinois | Crystal Lake
    • Ultramarathon - 50 kilometers
    • April 26, 2014 - 08:00
    • Trail Relay
  • FlatRock 101K Ultra Trail Race

    • North America | USA | West North Central | Kansas | Independence
    • Ultramarathon - 101 kilometers
    • April 26, 2014 - 06:30
  • Folsom Lake Trail 50K Run

    • North America | USA | Pacific | California | Folsom Point
    • Ultramarathon - 50 kilometers
    • April 26, 2014 - 08:00
    • Trail
  • Fort Clinch 100M

    • North America | USA | South Atlantic | Florida | Fernandina Beach, Amelia Island
    • Ultramarathon - 100 miles
    • April 26, 2014
    • Trail Hilly
  • Fort Clinch 50M

    • North America | USA | South Atlantic | Florida | Fernandina Beach, Amelia Island
    • Ultramarathon - 50 miles
    • April 26, 2014
    • Trail Hilly
  • Frisco Railroad Run 50k Ultramarathon

    • North America | USA | West North Central | Missouri | Willard
    • Ultramarathon - 50 kilometers
    • April 26, 2014 - 07:30
    • Trail Relay
  • Frisco Railroad Run 50 Mile Ultramarathon

    • North America | USA | West North Central | Missouri | Willard
    • Ultramarathon - 50 miles
    • April 26, 2014 - 08:00
    • Trail Relay
  • Heartland Relay

    • North America | USA | West North Central | Iowa | Winterset
    • Ultramarathon - 205 miles
    • April 26, 2014
    • Relay Road Running