2018 - 2019 Ultramarathon Calendar in May

Browse our Ultramarathon Calendar for races organized around the world during the month of May among 361 races.

361 races

Trans Atlas Marathon

Trans Atlas Marathon "CHALLENGE"
05/04/2018 - 08:00
Africa / Northern Africa / Morocco / Agouti
Ultramarathon
Mountain Trail Running Mountain Solo

5K for FA

Kids Fun Run
05/05/2018 - 09:30
North America / USA / Mid-Atlantic / New York / Hilton
Ultramarathon
Running

Grayson Highlands Half/Marathon

50K
05/05/2018 - 08:00
North America / USA / South Atlantic / Virginia / Mouth of Wilson
Ultramarathon
Trail Running Solo

Greenland Trail 50k

Greenland Trail 50k
05/05/2018 - 07:00
North America / USA / Mountain Region / Colorado / Larkspur
Ultramarathon
Trail Running

Hachie 50 Marathon, Ultra and Relay

50 Mile Ultra Relay
05/05/2018 - 05:00
North America / USA / West South Central / Texas / Waxahachie
Ultramarathon
Running

Hachie 50 Marathon, Ultra and Relay

50k Ultra-marathon
05/05/2018 - 07:00
North America / USA / West South Central / Texas / Waxahachie
Ultramarathon
Running

Hachie 50 Marathon, Ultra and Relay

50 Mile Ultra-marathon
05/05/2018 - 05:00
North America / USA / West South Central / Texas / Waxahachie
Ultramarathon
Running

Isle of Wight Challenge

Half Island Challenge
05/05/2018
Europe / Northern Europe / United Kingdom / England / Isle of Wight / Isle Of Wight
Ultramarathon
Trail Running

Isle of Wight Challenge

Full Island Challenge
05/05/2018
Europe / Northern Europe / United Kingdom / England / Isle of Wight / Isle Of Wight
Ultramarathon
UTMB Qualifier Trail Running

Margaret River Ultra Marathon

05/05/2018 - 07:00
Oceania / Australia and New Zealand / Australia / Western Australia / Wilyabrup
Ultramarathon
Trail Running

Miwok 100K Trail Race

05/05/2018 - 05:40
North America / USA / Pacific / California / Rodeo Lagoon
Ultramarathon
UTMB Qualifier Western States Qualifier Trail Running Solo

Thoroughbred Races

Thoroughbred Races 50k
05/05/2018 - 07:30
North America / USA / South Atlantic / Virginia / La Crosse
Ultramarathon
Trail Running