2016 - 2017 North America Ultramarathon Calendar in May

Browse our Ultramarathon Calendar for races organized in North America during the month of May among 149 races.

149 races

Greenland Trail 50k

Greenland Trail 50k
  • 2016-05-01
  • USA | Colorado | Greenland
  • Ultramarathon - 50 kilometers
  • Trail

Leoni Meadows Race Series - 50k, Half Marathon, 5k, Kids Fun Run

Leoni Meadows 50k
  • 2016-05-01
  • USA | California | Grizz
  • Ultramarathon - 50 kilometers
  • Hilly Fun Trail

Palm Bluff Trail Race and Ultra "Margaritas & Manure"

Palm Bluff Trail Race and Ultra "Margaritas & Manure" 50K
  • 2016-05-01
  • USA | Florida | Osteen
  • Ultramarathon - 50 kilometers
  • Trail

Palm Bluff Trail Race and Ultra "Margaritas & Manure"

Palm Bluff Trail Race and Ultra "Margaritas & Manure" 50M
  • 2016-05-01
  • USA | Florida | Osteen
  • Ultramarathon - 50 miles
  • Trail

The North Face Dirty Feet Kal Park 50

The North Face Dirty Feet Kal Park 50
  • 2016-05-01
  • Canada | British Columbia | Vernon
  • Ultramarathon - 50 kilometers
  • Trail North Face Dirty Feet Trail Series Mountain

Tchimbé Raid

Tchimbé Raid
  • 2016-05-04
  • Martinique | Camp de Balata
  • Ultramarathon - 91 kilometers
  • Trail Mountain

Tchimbé Raid

Tchimbé du Volcan
  • 2016-05-05
  • Martinique | Camp de Balata
  • Ultramarathon - 48.100 kilometers
  • Trail Mountain

Canyons 50K Trail Run

100K
  • 2016-05-07
  • USA | California | Foresthill
  • Ultramarathon - 100 kilometers
  • Trail Mountain

Nirvana Ultra Big Bear

100 Miler
  • 2016-05-07
  • USA | California | San Bernardino National Forest
  • Ultramarathon - 100 miles
  • Trail Nirvana Racing Co. Ultra Marathons Mountain

Canyons 50K Trail Run

50K
  • 2016-05-07
  • USA | California | Foresthill
  • Ultramarathon - 50 kilometers
  • Trail Mountain

Smith Rock Ascent 50K, 15M, 4M

50K
  • 2016-05-07
  • USA | Oregon | Smith Rock State Park, Terrebonne
  • Ultramarathon - 50 kilometers
  • UTMB Qualifier Trail Northwest Mountain Trail Series Mountain

Nirvana Ultra Big Bear

50 Miler
  • 2016-05-07
  • USA | California | San Bernardino National Forest
  • Ultramarathon - 50 miles
  • Trail Nirvana Racing Co. Ultra Marathons Mountain

Armstrong Redwoods

Armstrong Redwoods 50K
  • 2016-05-07
  • USA | California | Guerneville
  • Ultramarathon - 50 kilometers
  • Hilly Trail

Cactus to Cloud Trail Run

  • 2016-05-07
  • USA | New Mexico | Cloudcroft
  • Ultramarathon - 50 kilometers
  • Trail

Capon Valley 50K Run

  • 2016-05-07
  • USA | West Virginia | Yellow Spring
  • Ultramarathon - 50 kilometers
  • Hilly Trail Fund raising