US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

1,404 races

D.N.F. Ultra

December 15, 2018 Race day in over 1 year
USA / South Atlantic / South Carolina / Greenville
Ultramarathon

Buckeye Trail 50K

July 07, 2018 Race day in 12 months
USA / East North Central / Ohio / Brecksville
Ultramarathon

Keys 100

May 19, 2018 Race day in 10 months
USA / South Atlantic / Florida / Key Largo
Ultramarathon
Relay

Keys 100

May 19, 2018 Race day in 10 months
USA / South Atlantic / Florida / Key Largo
Ultramarathon
Charity Relay

Keys 100

May 19, 2018 Race day in 10 months
USA / South Atlantic / Florida / Key Largo
Ultramarathon

Knock on Wood

May 18, 2018 Race day in 10 months
USA / South Atlantic / South Carolina / Greenville
Ultramarathon
Trail

Glacier Ridge Trail Ultramarathon

May 12, 2018 Race day in 10 months
USA / Mid-Atlantic / Pennsylvania / Moraine State Park
Ultramarathon
Hilly Trail

Glacier Ridge Trail Ultramarathon

May 12, 2018 Race day in 10 months
USA / Mid-Atlantic / Pennsylvania / Moraine State Park
Ultramarathon
Hilly Trail

Glacier Ridge Trail Ultramarathon

May 12, 2018 Race day in 10 months
USA / Mid-Atlantic / Pennsylvania / Moraine State Park
Ultramarathon
Hilly Trail Relay

Greenland Trail 50k

May 05, 2018 Race day in 10 months
USA / Mountain Region / Colorado / Larkspur
Ultramarathon
Trail Fast

Trap Pond 50K, Marathon, and Half Marathon

April 29, 2018 To be confirmed Race day in 9 months
USA / South Atlantic / Delaware / Laurel
Ultramarathon
Altis Endurance Sports

Badwater Salton Sea

April 29, 2018 Race day in 9 months
USA / Pacific / California / Salton City
Ultramarathon
Desert Team