US Ultramarathons

Browse our Ultramarathon Calendar for races organized in the USA.

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1,376 races

Seneca Creek Greenway Trail Marathon & 50K

Seneca Creek Greenway Trail 50K
March 03, 2018 Race day in 11 months
USA / South Atlantic / Maryland / Damascus
Ultramarathon - 50 kilometers
Interview

Frozen Trail Runfest

Frozen Trail Runfest 50K
December 09, 2017 Race day in 9 months
USA / Pacific / Oregon / Buford Park, Mt Pisgah - Eugene
Ultramarathon - 50 kilometers
Trail

TARC Fells Trail Ultra

32M
December 02, 2017 Race day in 8 months
USA / New England / Massachusetts / Stoneham
Ultramarathon - 32 miles
Trail Tarc Trail Series

TARC Fells Trail Ultra

40M
December 02, 2017 Race day in 8 months
USA / New England / Massachusetts / Stoneham
Ultramarathon - 40 miles
Trail Tarc Trail Series

Caloosahatchee Ultra

Caloosahatchee Ultra 50K
December 02, 2017 Race day in 8 months
USA / South Atlantic / Florida / Alva
Ultramarathon - 50 kilometers
Trail

Dogwood Canyon Trail Run

Dogwood Canyon 50K Trail Run
November 12, 2017 Race day in 8 months
USA / West North Central / Missouri / Lampe
Ultramarathon - 50 kilometers
Trail

Upchuck 50K

November 11, 2017 Race day in 8 months
USA / East South Central / Tennessee / Chattanooga
Ultramarathon - 50 kilometers
Hilly Trail

Cottonmouth 100

100M
November 11, 2017 Race day in 8 months
USA / South Atlantic / Florida / 32570
Ultramarathon - 100 miles
Trail

NJ Trail Series One Day

NJ Trail Series One Day - 50K
November 11, 2017 Race day in 8 months
USA / Mid-Atlantic / New Jersey / Sussex County Fairgrounds
Ultramarathon - 50 kilometers

Franklin Mountains Trail Run

50k
November 11, 2017 Race day in 8 months
USA / West South Central / Texas / El Paso
Ultramarathon - 25 kilometers

Rosaryville Veteran's Day 50k

November 11, 2017 Race day in 8 months
USA / South Atlantic / Maryland / Upper Malboro
Ultramarathon - 50 kilometers
Trail

Cottonmouth 100

100K
November 11, 2017 Race day in 8 months
USA / South Atlantic / Florida / 32570
Ultramarathon - 100 kilometers
Trail

Ozark Trail 100 Mile Endurance Run

November 04, 2017 Race day in 7 months
USA / West North Central / Missouri / Steelville
Ultramarathon - 100 miles
Trail

Mountain Masochist Trail Run

November 04, 2017 Race day in 7 months
USA / South Atlantic / Virginia / Lynchburg
Ultramarathon - 50 miles
Trail Eco-x Sports

Silver Falls Trail Runs

50K Ultra
November 04, 2017 Race day in 7 months
USA / Pacific / Oregon / Silverton
Ultramarathon - 50 kilometers
Trail