US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

Refine by

1,376 races

Mt. Tammany 10

March 25, 2017 Race day in 2 days
USA / Mid-Atlantic / Pennsylvania / Delaware Water Gap
Ultramarathon - 40 miles
Hilly Trail

Nine Trails 35 Mile Endurance Run

March 25, 2017 Race day in 2 days
USA / Pacific / California / Santa Barbara
Ultramarathon - 35 miles
Hilly Trail All we do is run

Oak Moutain 50+

March 25, 2017 Race day in 2 days
USA / East South Central / Alabama / Oak Mountain State Park
Ultramarathon - 50 kilometers
Hilly Trail

Prairie Spirit Trail 100 & 50 Mile Ultra Races

Prairie Spirit Trail 100 Mile Ultra Race
March 25, 2017 Race day in 2 days
USA / West North Central / Kansas / Ottawa
Ultramarathon - 100 miles

Prairie Spirit Trail 100 & 50 Mile Ultra Races

Prairie Spirit Trail 50 Mile Ultra Race
March 25, 2017 Race day in 2 days
USA / West North Central / Kansas / Ottawa
Ultramarathon - 50 miles

Ultra Adventures Monument Valley

50 Mile
March 26, 2017 Race day in 3 days
USA / Mountain Region / Arizona / Monument Valley
Ultramarathon - 50 miles
Trail Ultra Adventures

White Mountains 100

March 26, 2017 Race day in 3 days
USA / Pacific / Alaska / White Mountains National Recreation Area, Fairbanks
Ultramarathon - 100 miles
Trail Iditarod Trail Invitational Qualifier Snow

NJ Ultra Festival

100K Trail Race
April 01, 2017 Race day in 9 days
USA / Mid-Atlantic / New Jersey / NJ State Fairgrounds, Augusta
Ultramarathon - 100 kilometers
NJ Trail Series Trail

NJ Ultra Festival

100M Trail Race
April 01, 2017 Race day in 9 days
USA / Mid-Atlantic / New Jersey / NJ State Fairgrounds, Augusta
Ultramarathon - 100 miles
NJ Trail Series Trail

Montaña de Oro

50km
April 01, 2017 Race day in 9 days
USA / Pacific / California / Los Osos
Ultramarathon - 50 kilometers
Trail Pacific Trail Runs

NJ Ultra Festival

50K Trail Race
April 01, 2017 Race day in 9 days
USA / Mid-Atlantic / New Jersey / NJ State Fairgrounds, Augusta
Ultramarathon - 50 kilometers
NJ Trail Series Trail

NJ Ultra Festival

50M Trail Race
April 01, 2017 Race day in 9 days
USA / Mid-Atlantic / New Jersey / NJ State Fairgrounds, Augusta
Ultramarathon - 50 miles
NJ Trail Series Trail

American River 50-mile Endurance Run

April 01, 2017 Race day in 9 days
USA / Pacific / California / Sacramento
Ultramarathon - 50 miles
Trail

Crown King Scramble 50 Km Trail Run

April 01, 2017 Race day in 9 days
USA / Mountain Region / Arizona / Lake Pleasant Regional Park
Ultramarathon - 50 kilometers
Trail Aravaipa Running

Fools 50K & 25K Trail Run

Fools 50K Trail Run
April 01, 2017 Race day in 9 days
USA / East North Central / Ohio / Cuyahoga Valley National Park, Peninsula
Ultramarathon - 50 kilometers
Trail Western Reserve Racing