2016 - 2017 USA Ultramarathon Calendar in May

Browse our Ultramarathon Calendar for races organized in USA during the month of May among 125 races.

125 races

Canyons 50K Trail Run

100K
2016-05-07
USA / Pacific / California / Foresthill
Ultramarathon - 100 kilometers
Trail Mountain Western States Qualifier

Nirvana Ultra Big Bear

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

Smith Rock Ascent 50K, 15M, 4M

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

Canyons 50K Trail Run

50K
2016-05-07
USA / Pacific / California / Foresthill
Ultramarathon - 50 kilometers
Trail Mountain

Nirvana Ultra Big Bear

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

All Day 5K

2016-05-07
USA / Mountain Region / Arizona / Chino Valley
Ultramarathon - 50 kilometers

Armstrong Redwoods

Armstrong Redwoods 50K
2016-05-07
USA / Pacific / California / Guerneville
Ultramarathon - 50 kilometers
Hilly Trail

Cactus to Cloud Trail Run

2016-05-07
USA / Mountain Region / New Mexico / Cloudcroft
Ultramarathon - 50 kilometers
Trail

Capon Valley 50K Run

2016-05-07
USA / South Atlantic / West Virginia / Yellow Spring
Ultramarathon - 50 kilometers
Hilly Trail Fund raising

Collegiate Peaks Trail Run

Collegiate Peaks 50M Trail Run
2016-05-07
USA / Mountain Region / Colorado / Buena Vista
Ultramarathon - 50 miles
Trail

Falcon 50

Falcon 50
2016-05-07
USA / Mountain Region / Colorado / Colorado Springs
Ultramarathon - 50 miles
Charity

Horseshoe Lake Trail Run

Horseshoe Lake 50K
2016-05-07
USA / Pacific / California / Palo Alto
Ultramarathon - 50 kilometers
Hilly Walk Trail Coastal Trail Runs

5K for FA

Kids Fun Run
2016-05-07
USA / Mid-Atlantic / New York / Hilton
Ultramarathon - 1000 kilometers

Long Island Greenbelt Trail 50k

Long Island Greenbelt Trail 50k
2016-05-07
USA / Mid-Atlantic / New York / Plainview
Ultramarathon - 50 kilometers
Trail

Lost Lake Ultra

Lost Lake 50K
2016-05-07
USA / Pacific / Washington / Bellingham
Ultramarathon - 50 kilometers
Trail Mountain