US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

1,366 races

Badder Marsh Night Ultra 50K

50K

2018-06-24

North America / USA / South Atlantic / Georgia / Richmond Hill

Ultramarathon

Night Race Multi terrain Running Solo

Bay of Fundy International Marathon

52K Ultra-Marathon

2018-06-24 - 05:30

North America / USA / New England / Maine / Lubec

Ultramarathon

Road Running Solo

Running with the Devil 100M, 50M, 50K, Marathon, 1/2, 10K, and 5K

50K

2018-06-24 - 06:00

North America / USA / Mountain Region / Nevada / Lovell Canyon Road

Ultramarathon

Road Running Solo

San Lorenzo River Trail Run

50 km

2018-06-24 - 08:00

North America / USA / Pacific / California / Harvey West Park, Santa Cruz

Ultramarathon

Trail Running Solo

Dawg Gone Long Run 50k/50 Miler

50k Ultra

2018-06-30 - 07:30

North America / USA / East North Central / Ohio / Waynesville

Ultramarathon

Trail Running Solo

Dawg Gone Long Run 50k/50 Miler

50 Mile Ultra

2018-06-30 - 06:30

North America / USA / East North Central / Ohio / Waynesville

Ultramarathon

Trail Running Solo

Finger Lakes Fifties

50 Miles

2018-06-30 - 06:30

North America / USA / Mid-Atlantic / New York / Hector

Ultramarathon

Trail Running Solo

Finger Lakes Fifties

50K

2018-06-30 - 06:30

North America / USA / Mid-Atlantic / New York / Hector

Ultramarathon

Trail Running Solo

Seeley Lake 50K and 10K

50K

2018-06-30 - 06:15

North America / USA / Mountain Region / Montana / Seeley Lake

Ultramarathon

Mountain Trail Running Mountain Solo

Buckeye Trail 50K

2018-07-07 - 07:00

North America / USA / East North Central / Ohio / Brecksville

Ultramarathon

Running

Golden Gate Trail Run (summer)

Golden Gate Trail Run 50 km (summer)

2018-07-07 - 07:00

North America / USA / Pacific / California / Rodeo Beach, Golden Gate National Recreation, CA

Ultramarathon

Trail Running Solo

John Cappis 50K Fat Ass

2018-07-07 - 05:00

North America / USA / Mountain Region / Colorado / Silverton

Ultramarathon

Trail Running Mountain