2014 - 2015 North America Ultramarathon Calendar in May

Browse our Ultramarathon Calendar for races organized in North America during the month of May among 143 races.

143 races

Collegiate Peaks 50M Trail Run

  • North America | USA | Mountain Region | Colorado | 9565
  • Ultramarathon - 50 miles
  • May 02, 2015
  • Trail

Greenland Trail 50k

  • North America | USA | Mountain Region | Colorado | 2430
  • Ultramarathon - 50 kilometers
  • May 02, 2015 - 08:00
  • Trail

Labor of Love 100M

  • North America | USA | Mountain Region | Nevada | 12526
  • Ultramarathon - 100 miles
  • May 02, 2015
  • "Road Running" "Calico Racing"

Labor of Love 50K

  • North America | USA | Mountain Region | Nevada | 4342
  • Ultramarathon - 50 kilometers
  • May 02, 2015 - 06:00
  • "Calico Racing"

Labor of Love 50M

  • North America | USA | Mountain Region | Nevada | 12527
  • Ultramarathon - 50 miles
  • May 02, 2015
  • "Road Running" "Calico Racing"

Miwok 100K Trail Race

  • North America | USA | Pacific | California | 2693
  • Ultramarathon - 100 kilometers
  • May 02, 2015 - 05:40
  • "UTMB Qualifier" Trail "Western States Qualifier"

OBX Ultramarathon

  • North America | USA | South Atlantic | North Carolina | 12595
  • Ultramarathon - 50 kilometers
  • May 02, 2015 - 05:00
  • Flat Fun Green Barefoot Trail "North Carolina Ultra Series" Sand

Rock The Ridge 50-Mile Endurance Challenge

  • North America | USA | Mid-Atlantic | New York | 17768
  • Ultramarathon - 50 miles
  • May 02, 2015
  • Walk Charity Trail Relay

Run for Kids Challenge 50K Trail Race

  • North America | USA | East South Central | Alabama | 15755
  • Ultramarathon - 50 kilometers
  • May 02, 2015 - 07:00
  • Trail

Sinister Night 54K Trail Run

  • North America | USA | Mountain Region | Arizona | 18989
  • Ultramarathon - 54 kilometers
  • May 02, 2015 - 19:00
  • Night Trail "Aravaipa Running"

Tchimbé du Volcan

  • North America | Martinique | 18773
  • Ultramarathon - 48.1 kilometers
  • May 02, 2015 - 06:00
  • Trail Mountain

Tchimbé Raid

  • North America | Martinique | 18772
  • Ultramarathon - 91 kilometers
  • May 02, 2015 - 00:00
  • Trail Mountain

The North Face Endurance Challenge New York 50k

  • North America | USA | Mid-Atlantic | New York | 2636
  • Ultramarathon - 50 kilometers
  • May 02, 2015 - 07:00
  • Hilly Trail

The North Face Endurance Challenge New York 50 Mile

  • North America | USA | Mid-Atlantic | New York | 2635
  • Ultramarathon - 50 miles
  • May 02, 2015 - 05:00
  • Hilly Trail

Wild Wild West 50K Ultra

  • North America | USA | Pacific | California | 3868
  • Ultramarathon - 50 kilometers
  • May 02, 2015 - 06:00
  • Trail Mountain