US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

1,417 races

Reebok Ragnar Colorado

August 24, 2017 Race day in 2 days
USA / Mountain Region / Colorado / Copper Mountain
Ultramarathon

Hood to Coast Relay

August 25, 2017 To be confirmed Race day in 3 days
USA / Pacific / Oregon / Mt Hood
Ultramarathon
Relay

Kodiak 100 Mile and 50 Mile UltraMarathon

August 25, 2017 Race day in 3 days
USA / Pacific / California / Big Bear Lake
Ultramarathon
Trail Mountain UTMB Qualifier

Kodiak 100 Mile and 50 Mile UltraMarathon

August 25, 2017 Race day in 3 days
USA / Pacific / California / Big Bear Lake
Ultramarathon
Trail Mountain

Ragnar Relay Colorado

August 25, 2017 Race day in 3 days
USA / Mountain Region / Colorado / Aspen
Ultramarathon
Ragnar Relay Series Mountain Relay

Baker Trail UltraChallenge

August 26, 2017 Race day in 4 days
USA / Mid-Atlantic / Pennsylvania / Brookville
Ultramarathon
Trail

Bulldog 50K and 25K

August 26, 2017 Race day in 4 days
USA / Pacific / California / Calabasas
Ultramarathon
Trail

Cascade Crest 100 Mile Endurance Run

August 26, 2017 Race day in 4 days
USA / Pacific / Washington / Easton
Ultramarathon
Trail UTMB Qualifier

Kodiak 100 Mile and 50 Mile UltraMarathon

August 26, 2017 Race day in 4 days
USA / Pacific / California / Big Bear Lake
Ultramarathon
Trail Mountain

Kodiak 100 Mile and 50 Mile UltraMarathon

August 26, 2017 Race day in 4 days
USA / Pacific / California / Big Bear Lake
Ultramarathon
Trail Mountain

North Country Trail Run

August 26, 2017 Race day in 4 days
USA / East North Central / Michigan / Manistee
Ultramarathon
Hilly Trail

Reveille Peak Ranch

August 26, 2017 Race day in 4 days
USA / West South Central / Texas / Reveille Peak Ranch, Burnet
Ultramarathon
Tejas Trails Trail Night