US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

1,414 races

Quad Rock 50

May 13, 2017 The race has already taken place.
USA / Mountain Region / Colorado / Fort Collins
Ultramarathon
Trail

Quicksilver 50K and 100K Endurance Run

May 13, 2017 The race has already taken place.
USA / Pacific / California / Amalden
Ultramarathon
Hilly

Quicksilver 50K and 100K Endurance Run

May 13, 2017 The race has already taken place.
USA / Pacific / California / Amalden
Ultramarathon
Hilly

Rock On! Lake Perry

May 13, 2017 The race has already taken place.
USA / West North Central / Kansas / Meriden
Ultramarathon
Hilly Trail

Smith Rock Ascent 50K, 15M, 4M

May 13, 2017 The race has already taken place.
USA / Pacific / Oregon / Smith Rock State Park, Terrebonne
Ultramarathon
Trail Mountain UTMB Qualifier

The North Face Endurance Challenge New York

May 13, 2017 The race has already taken place.
USA / Mid-Atlantic / New York / Bear Mountain State Park, Bear Mountain
Ultramarathon
Hilly Trail The North Face Endurance Challenge

The North Face Endurance Challenge New York

May 13, 2017 The race has already taken place.
USA / Mid-Atlantic / New York / Bear Mountain State Park, Bear Mountain
Ultramarathon
Hilly Trail The North Face Endurance Challenge

Trail Runner Ultra Race of Champions 100K

May 13, 2017 The race has already taken place.
USA / South Atlantic / Virginia / Raphine
Ultramarathon
Trail Mountain

Trail Runner Ultra Race of Champions 100K

May 13, 2017 The race has already taken place.
USA / South Atlantic / Virginia / Raphine
Ultramarathon
Trail

Wapack and Back Trail Races

May 13, 2017 The race has already taken place.
USA / New England / Massachusetts / Ashburnham
Ultramarathon
Trail Tarc Trail Series

Wapack and Back Trail Races

May 13, 2017 The race has already taken place.
USA / New England / Massachusetts / Ashburnham
Ultramarathon
Trail Tarc Trail Series

Whoos in El Moro Race Spring Edition

May 13, 2017 The race has already taken place.
USA / Pacific / California / Crystal Cove State Park
Ultramarathon
Hilly Trail