2018 - 2019 Ultramarathon Calendar in May

Browse our Ultramarathon Calendar for races organized around the world during the month of May among 352 races.

352 races

Greenland Trail 50k

50K Trail Race
2019-05-04 - 07:00
North America / USA / Mountain Region / Colorado / Larkspur
Ultramarathon
Trail Running Solo

Keys 100

100 Mile Team Relay
2019-05-18 - 05:45
North America / USA / South Atlantic / Florida / Key West
Ultramarathon
Road Running Relay

Keys 100

50 Mile Individual Ultra
2019-05-18 - 09:45
North America / USA / South Atlantic / Florida / Key West
Ultramarathon
Road Running Solo

Keys 100

50 Kilometer Individual Ultra
2019-05-18 - 13:00
North America / USA / South Atlantic / Florida / Key West
Ultramarathon
Road Running Solo

Keys 100

100 Mile Individual Ultra
2019-05-18 - 06:15
North America / USA / South Atlantic / Florida / Key West
Ultramarathon
Road Running Solo

Jemez Mountain Trail Runs

50K
2019-05-19 - 06:00
North America / USA / Mountain Region / New Mexico / Los Alamos
Ultramarathon
UTMB Qualifier Trail Running Hilly Solo

Jemez Mountain Trail Runs

50-Mile
2019-05-19 - 05:00
North America / USA / Mountain Region / New Mexico / Los Alamos
Ultramarathon
UTMB Qualifier Trail Running Hilly Solo

Hardmoors 200 Ultramarathon

2017-05-05
Europe / Northern Europe / United Kingdom / England / East Riding of Yorkshire / Hull
Ultramarathon
Trail Running

Dirty German Endurance Fest

Dirty German 50K
2017-05-13 - 08:00
North America / USA / Mid-Atlantic / Pennsylvania / Pennypack Park, Philadelphia
Ultramarathon
Trail Running

Dirty German Endurance Fest

Dirty German 50 Miles
2017-05-13 - 08:00
North America / USA / Mid-Atlantic / Pennsylvania / Pennypack Park, Philadelphia
Ultramarathon
Trail Running

Gold Rush 50K

2017-05-13
North America / USA / Pacific / California / Folsom
Ultramarathon
Trail Running Solo

Heroes Ultra

2017-05-13 - 08:00
Europe / Southern Europe / Greece / Crete Region
Ultramarathon
Running
Upcoming races first Name A->Z Name Z->A Location A->Z Location Z->A Date older->newer Date newer-> older