US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

1,407 races

Wild Woman Trail Marathon, 50K and Relay

July 15, 2017 The race has already taken place.
USA / Pacific / Washington / Trout Lake
Ultramarathon
Women-only Trail

SPASM Lake Chabot Train Run (Jul)

July 16, 2017 The race has already taken place.
USA / Pacific / California / Lake Chabot Regional Park, Castro Valley
Ultramarathon
Coastal Trail Runs Trail

Down East Sunrise Trail Team Relay

July 21, 2017 The race has already taken place.
USA / New England / Maine / Ellsworth
Ultramarathon
Charity Trail Night Relay

Ragnar Trail Tahoe

July 21, 2017 The race has already taken place.
USA / Pacific / California / Sierra-at-Tahoe Resort, Twin Bridges
Ultramarathon
Trail Relay

Barrel to Keg Relay

July 22, 2017 The race has already taken place.
USA / Pacific / Oregon / Philomath
Ultramarathon
Charity Relay

Full mOOn 50K and 25K

July 22, 2017 The race has already taken place.
USA / West South Central / Arkansas / Lake Sylvia Day Park
Ultramarathon
Trail

Harding Hustle

July 22, 2017 The race has already taken place.
USA / Pacific / California / Modjeska Canyon
Ultramarathon
Trail Mountain

Never Summer 100km

July 22, 2017 The race has already taken place.
USA / Mountain Region / Colorado / Gould
Ultramarathon
Trail

Psycho Psummer

July 22, 2017 The race has already taken place.
USA / West North Central / Kansas / Kansas City
Ultramarathon
Hilly Trail

Rosaryville 10k, 10M, 25k, 50k Trail Runs

July 22, 2017 The race has already taken place.
USA / South Atlantic / Maryland / Rosaryville State Park
Ultramarathon
Trail

Rose City Relay

July 22, 2017 The race has already taken place.
USA / Pacific / Oregon / Gresham
Ultramarathon

Rose City Relay

July 22, 2017 The race has already taken place.
USA / Pacific / Oregon / Gresham
Ultramarathon