US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

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1,361 races

Javelina Jundred 100 Mile Endurance Run

100K
October 28, 2017 Race day in 6 months
USA / Mountain Region / Arizona / Scottsdale
Ultramarathon - 100 kilometers
Desert Trail Aravaipa Running

C.U.R.E Ultra's

100K
April 29, 2017 Race day in 1 day
USA / Mountain Region / Colorado / Chatfield State Park, Littleton
Ultramarathon - 100 kilometers
Trail

DoubleTop 100

100k
April 22, 2017 The race has already taken place.
USA / South Atlantic / Georgia / Ft Mountain State Park
Ultramarathon - 100 kilometers
Hilly Fun Trail Fast

Run-de-Vous

100K
August 20, 2016 The race has already taken place.
USA / Pacific / California / San Martin
Ultramarathon - 100 kilometers

Lovers Leap of Faith

100K
July 01, 2017 Race day in 2 months
USA / Pacific / California / Strawberry
Ultramarathon - 100 kilometers

J&J Race and Trail Running Reunion

100K
September 30, 2017 Race day in 5 months
USA / West South Central / Texas / Rocksprings
Ultramarathon - 100 kilometers
Tejas Trails

Plain 100 Mile Endurance Run

100K
September 16, 2017 Race day in 5 months
USA / Pacific / Washington / Plain
Ultramarathon - 100 kilometers
Trail

Trail Runner Ultra Race of Champions 100K

100K
May 13, 2017 Race day in 15 days
USA / South Atlantic / Virginia / Raphine
Ultramarathon - 100 kilometers
Trail Mountain

Wildcat Ridge Romp

100k
August 12, 2017 Race day in 4 months
USA / Mid-Atlantic / New Jersey / Rockaway Township
Ultramarathon - 100 kilometers
NJ Trail Series

Angel Fire Endurance Run

100K
June 17, 2017 Race day in about 2 months
USA / Mountain Region / New Mexico / Angel Fire
Ultramarathon - 100 kilometers
Trail Mountain

Long Haul 100

100K
January 14, 2017 The race has already taken place.
USA / South Atlantic / Florida / Wesley Chapel
Ultramarathon - 100 kilometers
Charity Team Trail

Mo' Bell

100K
August 05, 2017 Race day in 3 months
USA / East South Central / Tennessee / Burns
Ultramarathon - 100 kilometers

100 Not Yo Momma's

100K
September 24, 2016 The race has already taken place.
USA / East North Central / Ohio / Great Seal State Park, Chillicothe
Ultramarathon - 100 kilometers

Zion Ultras

100k
April 07, 2017 The race has already taken place.
USA / Mountain Region / Utah / Springdale
Ultramarathon - 100 kilometers
Hilly Desert Trail Ultra Adventures

Ultra Adventure Tushars

100K
July 30, 2017 Race day in 3 months
USA / Mountain Region / Utah / Eagle Point Ski Resort
Ultramarathon - 100 kilometers
Trail