US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

1,416 races

"Running for the Bay!" Marathon

October 22, 2017 The race has already taken place.
USA / South Atlantic / Florida / Apalachicola Bay
Ultramarathon
Road Running Wheelchair

(un)Pleasant Hill Trail Runs

April 08, 2017 The race has already taken place.
USA / East South Central / Kentucky / Harrodsburg
Ultramarathon

100 Mile Endurance Challenge

No race in 2016
USA / Pacific / California / Corona
Ultramarathon
Charity Road Running

100 Mile Endurance Challenge

No race in 2016
USA / Pacific / California / Corona
Ultramarathon
Charity Road Running

100 Not Yo Momma's

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

100 Not Yo Momma's

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

100 Not Yo Momma's

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

100 Not Yo Momma's

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

100on100 Relay

August 12, 2017 The race has already taken place.
USA / New England / Vermont / Stowe
Ultramarathon
Relay

26.2 With Donna

February 11, 2018 Race day in 4 months
USA / South Atlantic / Florida / Jacksonville Beach
Ultramarathon
Road Running

3 Days at the Fair

May 15, 2017 The race has already taken place.
USA / Mid-Atlantic / New Jersey / Sussex County Fairgrounds
Ultramarathon
NJ Trail Series

5K for FA

May 06, 2017 The race has already taken place.
USA / Mid-Atlantic / New York / Hilton
Ultramarathon