US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

1,090 races

Boyers Furnace

  • North America | USA | South Atlantic | Virginia | Fort Valley
  • Ultramarathon - 40 miles
  • December 27, 2014 - 06:00
  • Trail

Houston Running Festival 100K

  • North America | USA | Texas | Houston
  • Ultramarathon - 100 kilometers
  • December 27, 2014 - 07:30
  • Flat

Houston Running Festival 100 Mile

  • North America | USA | Texas | Houston
  • Ultramarathon - 100 miles
  • December 27, 2014 - 07:30
  • Flat

Houston Running Festival 50K

  • North America | USA | Texas | Houston
  • Ultramarathon - 50 kilometers
  • December 27, 2014 - 07:35
  • Flat

Houston Running Festival 50 Mile

  • North America | USA | Texas | Houston
  • Ultramarathon - 50 miles
  • December 27, 2014 - 07:30
  • Flat

Woodside 50 km

  • North America | USA | California | Woodside
  • Ultramarathon - 50 kilometers
  • December 28, 2014 - 08:30
  • Trail "Pacific Trail Runs"

First Call Veterans Day 50K (January)

  • North America | USA | Pacific | Washington | Bothell
  • Ultramarathon - 50 kilometers
  • January 01, 2015

Redeye 50 km

  • North America | USA | South Atlantic | Virginia | Triangle
  • Ultramarathon - 50 kilometers
  • January 01, 2015 - 08:00
  • Trail

Tuscobia Winter Ultramarathon 150 Mile Run

  • North America | USA | East North Central | Wisconsin | Park Falls
  • Ultramarathon - 150 miles
  • January 01, 2015 - 06:00
  • Snow Trail

Tuscobia Winter Ultramarathon 35 Mile Run

  • North America | USA | East North Central | Wisconsin | Park Falls
  • Ultramarathon - 35 miles
  • January 02, 2015 - 12:00
  • Snow Trail

Tuscobia Winter Ultramarathon 75 Mile Run

  • North America | USA | East North Central | Wisconsin | Park Falls
  • Ultramarathon - 75 miles
  • January 02, 2015 - 10:00
  • Snow Trail

Croom Zoom 100 Km Run

  • North America | USA | South Atlantic | Florida | Brooksville
  • Ultramarathon - 100 kilometers
  • January 03, 2015 - 06:00
  • Trail

Croom Zoom 50 Km Run

  • North America | USA | South Atlantic | Florida | Brooksville
  • Ultramarathon - 50 kilometers
  • January 03, 2015 - 06:00
  • Trail

Frozen Sasquatch Trail 50k

  • North America | USA | South Atlantic | West Virginia | Kanawha State Forest
  • Ultramarathon - 50 kilometers
  • January 03, 2015 - 08:00
  • Trail

Harbison 50K

  • North America | USA | South Atlantic | South Carolina | Columbia
  • Ultramarathon - 50 kilometers
  • January 03, 2015 - 07:30
  • Trail