US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

1,412 races

Anchor Down Ultra

August 18, 2017 Race day in 1 day
USA / New England / Rhode Island / Bristol
Ultramarathon

Oregon 100K Relay

August 18, 2017 Race day in 1 day
USA / Pacific / Oregon / Saint Paul
Ultramarathon

Ragnar Relay Great River

August 18, 2017 Race day in 1 day
USA / West North Central / Minnesota / Winona
Ultramarathon
Trail Ragnar Relay Series

Ragnar Trail Rainier-WA, Presented by Salomon

August 18, 2017 Race day in 1 day
USA / Pacific / Washington / Crystal Mountain
Ultramarathon
Trail

Reebok Ragnar Great River

August 18, 2017 Race day in 1 day
USA / West North Central / Minnesota / Winona
Ultramarathon

Spokane to Sandpoint Relay

August 18, 2017 Race day in 1 day
USA / Pacific / Washington / Spokane
Ultramarathon

Habanero Hundred

August 19, 2017 Race day in 2 days
USA / West South Central / Texas / Buescher State Park Lake Dam
Ultramarathon
Trail

Habanero Hundred

August 19, 2017 Race day in 2 days
USA / West South Central / Texas / Buescher State Park Lake Dam
Ultramarathon
Trail

Habanero Hundred

August 19, 2017 Race day in 2 days
USA / West South Central / Texas / Buescher State Park Lake Dam
Ultramarathon
Trail

Hot Hot Hundred 10k & 100k Relay

August 19, 2017 Race day in 2 days
USA / East South Central / Kentucky / Wallingford
Ultramarathon
Relay

Leadville Trail 100 Run

August 19, 2017 Race day in 2 days
USA / Mountain Region / Colorado / Leadville
Ultramarathon
Trail Leadville Race Series Mountain UTMB Qualifier Western States Qualifier

Lean Horse Ultra-Marathon Hundred, Half Hundred, & 50K

August 19, 2017 Race day in 2 days
USA / West North Central / South Dakota / Hot Springs
Ultramarathon
Trail