US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

1,411 races

PEAK Ultra Marathon

500 Miles

2018-04-25 - 07:00

North America / USA / New England / Vermont / Pittsfield

Ultramarathon

Trail Running Solo

American Odyssey Relay

2018-04-27 - 06:00

North America / USA / South Atlantic / Washington D.C. / Washington

Ultramarathon

Road Running Relay

Ragnar Trail Richmond-VA, Presented by Salomon

2018-04-27 - 09:00

North America / USA / Mid-Atlantic / Virginia / Chesterfield

Ultramarathon

Trail Running

Big A 50K Trail Run

2018-04-28

North America / USA / New England / Maine / York

Ultramarathon

Trail Running Solo

Canyons 50K Trail Run

50K

2018-04-28 - 05:30

North America / USA / Pacific / California / Foresthill

Ultramarathon

Mountain Trail Running Mountain Point to Point Solo

Canyons 50K Trail Run

100K

2018-04-28 - 05:30

North America / USA / Pacific / California / Foresthill

Ultramarathon

Mountain Western States Qualifier UTMB Qualifier Trail Running Mountain Point to Point Solo

Capitol Peak 50 miler/25k

Capitol Peak 50 miler

2018-04-28 - 06:00

North America / USA / Pacific / Washington / Olympia

Ultramarathon

Trail Running Solo

C&O Canal 100

2018-04-28 - 07:00

North America / USA / South Atlantic / Maryland / Camp Manidokan

Ultramarathon

Road Running Flat Solo

Coopers Rock 50 km and Half Marathon

50 km

2018-04-28 - 07:00

North America / USA / South Atlantic / West Virginia / Morgantown

Ultramarathon

Trail Running Solo

DTR Endurance Race 5k/10k/Half-Marathon/50k

DTR Endurance Race 50k

2018-04-28 - 06:00

North America / USA / South Atlantic / Florida / Stuart

Ultramarathon

Forest Sand Trail Running Solo

Extreme Dirty Thirty 2018

30.33 miles

2018-04-28

North America / USA / East North Central / Wisconsin / Kewaskum

Ultramarathon

Running

FlatRock 101K Ultra Trail Race

FlatRock 101K Ultra Trail Race

2018-04-28 - 06:30

North America / USA / West North Central / Kansas / Independence, KS

Ultramarathon

Trail Running Solo