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Running EventsUltramarathons

Ultra Marathons in the USA

Ultramarathons, or ultras, are any running races beyond the standard marathon distance of 26.2 miles (or 42.2k). The most common ultra distances are 50k, 100k, 50 miles, or 100 miles, but each event is unique in terms of distance and terrain. The International Association of Athletics Federation recognises world records at ultramarathon events that have a distance of 100km. There are even 24hr ultramarathons, where the distance is unlimited, or multiday ultras, where the distance can extend beyond 1000km. There are a couple of city-based ultramarathons, but most ultras make the most of the USA's stunning scenery and landscapes. A lot of these events go off-road and require trail-running over difficult terrain with steep climbs or along rugged coastlines. There are over 1,500 ultramarathon events in the USA. One of the most famous and most difficult events is the Badwater Ultramarathon, which is 135 miles long through the searing heat and arduous terrain of Death Valley.

51 events found
The Pacific Crest Trail 50 Miles

Saturday, 13 May 2023

The Pacific Crest Trail 50 Miles

LocationIndicator

San Diego, California

Participants

ultramarathon

FilledTicketPrice TBC
Trail
Heart
Ragnar Trail Kentucky

Friday, 19 May 2023

Ragnar Trail Kentucky

LocationIndicator

Brandenburg, Kentucky

Participants

ultramarathon

FilledTicketPrice TBC
Heart
Valkyrie Trail Race

Saturday, 20 May 2023

Valkyrie Trail Race

LocationIndicator

Colorado Springs, Colorado

Participants

half marathon, marathon, ultramarathon

FilledTicketPrice TBC
Heart
Ragnar Trail Colorado

Friday, 9 Jun 2023

Ragnar Trail Colorado

LocationIndicator

Snowmass Village, Colorado

Participants

ultramarathon

FilledTicketPrice TBC
Hilly trail
Heart
Yellowstone Half Marathon and 5k

Friday, 9 Jun 2023

Yellowstone Half Marathon and 5k

LocationIndicator

West Yellowstone, Montana

Participants

5k, half marathon, ultramarathon

FilledTicket$46 – $377
Trail
Heart
Ragnar Sprint Wasatch Back

Saturday, 10 Jun 2023

Ragnar Sprint Wasatch Back

LocationIndicator

Logan, Utah

Participants

ultramarathon

FilledTicketPrice TBC
Heart
Mt. Umunhum Ultras

Saturday, 10 Jun 2023

Mt. Umunhum Ultras

LocationIndicator

San Jose, California

Participants

ultramarathon, marathon, half marathon, 10k, 5k

FilledTicketPrice TBC
Hilly trail
Heart
Running with the Devil

Saturday, 17 Jun 2023

Running with the Devil

LocationIndicator

Las Vegas, Nevada

Participants

ultramarathon, marathon, half marathon, 10k, 5k

FilledTicketPrice TBC
Flat road
Heart
Tahoe 100k

Saturday, 17 Jun 2023

Tahoe 100k

LocationIndicator

Stateline, Nevada

Participants

ultramarathon

FilledTicketPrice TBC
Great sceneryHilly trail
Heart
Bears Ears Ultra

Saturday, 24 Jun 2023

Bears Ears Ultra

LocationIndicator

Monticello, Utah

Participants

ultramarathon

FilledTicketPrice TBC
Heart
Rancho Hills Trail Run

Saturday, 8 Jul 2023

Rancho Hills Trail Run

LocationIndicator

Morgan Hill, California

Participants

5k, 10k, half marathon, ultramarathon, marathon

FilledTicketPrice TBC
Trail
Heart
Silver Rush 50 Run

Saturday, 8 Jul 2023

Silver Rush 50 Run

LocationIndicator

Lake County, Colorado

Participants

ultramarathon

Star5

(1 reviews)

FilledTicketPrice TBC
Great atmosphere
Heart
Ragnar Road Northwest Passage

Friday, 14 Jul 2023

Ragnar Road Northwest Passage

LocationIndicator

Blaine, Washington

Participants

ultramarathon

FilledTicketPrice TBC
Heart
The Peak 50k, Marathon & Half Marathon

Saturday, 15 Jul 2023

The Peak 50k, Marathon & Half Marathon

LocationIndicator

San Diego County, California

Participants

ultramarathon, marathon, half marathon

FilledTicketPrice TBC
Hilly trail
Heart
San Francisco Marathon

Saturday, 22 Jul 2023

San Francisco Marathon

LocationIndicator

San Francisco, California

Participants

marathon, ultramarathon, 5k, half marathon

Star4.5

(5 reviews)

FilledTicketPrice TBC
Great atmosphereGreat sceneryRoad
Heart
Kirkwood's Thunder Mountain Trail Challenge

Saturday, 22 Jul 2023

Kirkwood's Thunder Mountain Trail Challenge

LocationIndicator

Markleeville, California

Participants

half marathon, 10k, 5k, marathon, ultramarathon

FilledTicketPrice TBC
Great sceneryTrail
Heart
Never Summer 100k & 60k

Saturday, 29 Jul 2023

Never Summer 100k & 60k

LocationIndicator

Walden, Colorado

Participants

ultramarathon

FilledTicketPrice TBC
Flat trail
Heart
Pikes Peak Ultra

Sunday, 30 Jul 2023

Pikes Peak Ultra

LocationIndicator

Colorado Springs, Colorado

Participants

ultramarathon

FilledTicketPrice TBC
Heart
Kirkwood’s Ultras

Saturday, 5 Aug 2023

Kirkwood’s Ultras

LocationIndicator

Kirkwood, California

Participants

ultramarathon, 5k, half marathon, 10k

FilledTicketPrice TBC
Hilly trail
Heart
Ragnar Trail Appalachians

Friday, 11 Aug 2023

Ragnar Trail Appalachians

LocationIndicator

Bruceton Mills, West Virginia

Participants

ultramarathon

FilledTicketPrice TBC
Hilly
Heart
Leadville Trail 100 Run

Saturday, 19 Aug 2023

Leadville Trail 100 Run

LocationIndicator

Leadville, Colorado

Participants

ultramarathon

FilledTicketPrice TBC
Heart
Run Rabbit Run

Friday, 15 Sept 2023

Run Rabbit Run

LocationIndicator

Steamboat Springs, Colorado

Participants

ultramarathon

FilledTicketPrice TBC
Heart
Crested Butte Ultra

Saturday, 30 Sept 2023

Crested Butte Ultra

LocationIndicator

Crested Butte, Colorado

Participants

ultramarathon

FilledTicketPrice TBC
Heart
Scioto Trail Challenge

Sunday, 1 Oct 2023

Scioto Trail Challenge

LocationIndicator

Chillicothe, Ohio

Participants

ultramarathon

FilledTicketPrice TBC
Heart
Showing 25 - 48 of 51 events

About ultramarathons in the USA

Ultramarathons, or ultra runs, are endurance running races or treks beyond the standard marathon distance of 26.2 miles (42.2k). The most common distances for ultra running are 50k, 100k, 50 miles, or 100 miles (aka centurion races). Ultras take place on roads or trails across the US, and some last for 24 hours or multiple days. Some multi-day stage races are even self-sufficient, where runners must carry all of there equipment and provisions with them for the duration of the race.

What are the best USA ultra marathons?

There are over 1,500 ultra marathon events in the USA. The best ultra marathons make the most of the USA's spectacular scenery, including coasts, deserts, mountains, and national parks. The Golden Gate Trail Run is one of the best rated ultra marathon events on our list. The Badwater 135 is seen as one of the world's toughest and hardest ultra marathons, going through Death Valley.

How long should I train for an ultramarathon?

It is important to devote a significant amount of time and effort to training if you are wanting to complete an ultramarathon. Everybody has different levels of fitness and the race distances vary, so it is difficult to be precise with training plans. Most first-time ultrarunners will already have lots of running experience, so 6-10 weeks of specific training should get you ready for a 50k ultra. During your training, it is also important to get used to in-race nutrition and running on trails.

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