2016 - 2017 USA Ultramarathon Calendar in May

Browse our Ultramarathon Calendar for races organized in USA during the month of May among 127 races.

127 races

Wild Wild West Marathon

50K Ultra
2017-05-06
USA / Pacific / California / Lone Pine
Ultramarathon - 50 kilometers
Trail Mountain

Greenland Trail 50k

Greenland Trail 50k
2017-05-06
USA / Mountain Region / Colorado / Larkspur
Ultramarathon - 50 kilometers
Trail Fast

5K for FA

Kids Fun Run
2017-05-06
USA / Mid-Atlantic / New York / Hilton
Ultramarathon - 1000 kilometers

Miwok 100K Trail Race

2017-05-06
USA / Pacific / California / Rodeo Lagoon
Ultramarathon - 100 kilometers
UTMB Qualifier Trail Western States Qualifier

Paiute Meadows Trail 50K

50K Ultra
2017-05-13
USA / Pacific / California / Susanville
Ultramarathon - 50 kilometers
Trail

Ice Age Trail 50

Ice Age Trail 50K
2017-05-13
USA / East North Central / Wisconsin / La grange
Ultramarathon - 50 kilometers
Trail

Ice Age Trail 50

Ice Age Trail 50M
2017-05-13
USA / East North Central / Wisconsin / La grange
Ultramarathon - 50 miles
UTMB Qualifier Trail

PCT50 Trail Run

2017-05-13
USA / Pacific / California / Cleveland National Forest
Ultramarathon - 50 miles
Trail

Keys 100

Keys 100 Mile
2017-05-20
USA / South Atlantic / Florida / Key Largo
Ultramarathon - 100 miles
Charity Relay

Keys 100

Keys 50K Race
2017-05-20
USA / South Atlantic / Florida / Key Largo
Ultramarathon - 50 kilometers
Relay

Keys 100

Keys 50 Mile Race
2017-05-20
USA / South Atlantic / Florida / Key Largo
Ultramarathon - 50 miles

Spring Superior Trail Races

Spring Superior Trail 50 k
2017-05-20
USA / West North Central / Minnesota / Lutsen
Ultramarathon - 50 kilometers
Trail

Chippewa Moraine 'A Run for the AGES'

Chippewa 50K Trail Run
2017-05-27
USA / East North Central / Wisconsin / New Auburn
Ultramarathon - 50 kilometers
Trail

Run Madtown

Conquer the Capital 45.5 Challenge
2017-05-27
USA / East North Central / Wisconsin / Madison
Ultramarathon - 45.500 miles

Santa Barbara Trail Run

Santa Barbara 50K Trail Run
2014-05-31
USA / Pacific / California / Santa Barbara
Ultramarathon - 50 kilometers
Trail