US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

1,529 races

Ancient Oaks 100 Mile Race

12/16/2017 - 07:00
USA / South Atlantic / Florida / Titusville
Ultramarathon
Trail Running

Seashore Nature Trail Run 50K

12/16/2017 - 08:30
USA / South Atlantic / Virginia / Virginia Beach
Ultramarathon
Running

Houston Running Festival

100 Mile
12/17/2017
USA / Mid-Atlantic / Texas / Houston
Ultramarathon
Running Flat

Houston Running Festival

100K
12/17/2017
USA / Mid-Atlantic / Texas / Houston
Ultramarathon
Running Flat

Houston Running Festival

50 Mile
12/17/2017
USA / Mid-Atlantic / Texas / Houston
Ultramarathon
Running Flat

Houston Running Festival

50K
12/17/2017 - 07:35
USA / Mid-Atlantic / Texas / Houston
Ultramarathon
Running Flat

I Ran Marathons Christmas Lucky 12 days

50K
12/21/2017
USA / West South Central / Texas / San Antonio
Ultramarathon
Running

Tuscobia Winter Ultramarathon

160 Mile Run
12/28/2017 - 06:00
USA / East North Central / Wisconsin / Park Falls
Ultramarathon
Iditarod Trail Invitational Qualifier Trail Running

Tuscobia Winter Ultramarathon

80 Mile Run
12/29/2017 - 10:00
USA / East North Central / Wisconsin / Park Falls
Ultramarathon
Trail Running

Boyers Furnace

12/30/2017 - 06:00
USA / South Atlantic / Virginia / Fort Valley
Ultramarathon
Trail Running

The HUFF 50K Trail Run and Relay

HUFF 50K Trail Run
12/30/2017 - 08:00
USA / East North Central / Indiana / Albion
Ultramarathon
Trail Running

Recover from the Holidays

12/31/2017 - 08:00
USA / East South Central / Alabama / Huntsville Cross Country Park, Huntsville
Ultramarathon
Running