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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.

66 events found
Kodiak Ultra Marathons

Friday, Aug 19, 2022

Kodiak Ultra Marathons

LocationIndicator

Big Bear Lake, California

Participants

ultramarathon, half marathon, 10k

FilledTicketPrice TBC
Hilly trail
HeartOutline
Bulldog Ultra

Saturday, Aug 20, 2022

Bulldog Ultra

LocationIndicator

Calabasas, California

Participants

ultramarathon

FilledTicketPrice TBC
Great sceneryHilly trail
HeartOutline
West Line Winder

Saturday, Sep 24, 2022

West Line Winder

LocationIndicator

Buena Vista, Colorado

Participants

ultramarathon

FilledTicketPrice TBC
Great sceneryHilly trail
HeartOutline
The Bear Chase Trail Race

Saturday, Sep 24, 2022

The Bear Chase Trail Race

LocationIndicator

Lakewood, Colorado

Participants

ultramarathon, half marathon, 10k

FilledTicketPrice TBC
Hilly trail
HeartOutline
Cuyamaca 100k

Saturday, Oct 8, 2022

Cuyamaca 100k

LocationIndicator

Descanso, California

Participants

ultramarathon

FilledTicketPrice TBC
Flat trail
HeartOutline
Lake Sonoma 100k & 55k

Saturday, May 28, 2022

Lake Sonoma 100k & 55k

LocationIndicator

Geyserville, California

Participants

ultramarathon

FilledTicketPrice TBC
Flat trail
HeartOutline
North Fork Trail Race 50k & 50 Mile

Saturday, Jun 4, 2022

North Fork Trail Race 50k & 50 Mile

LocationIndicator

Pine, Colorado

Participants

ultramarathon

FilledTicketPrice TBC
Hilly trail
HeartOutline
Badwater 135

Saturday, Jun 11, 2022

Badwater 135

LocationIndicator

Inyo County, California

Participants

ultramarathon

FilledTicketPrice TBC
Great sceneryHilly trail
HeartOutline
Mt. Umunhum Ultras

Saturday, Jun 11, 2022

Mt. Umunhum Ultras

LocationIndicator

San Jose, California

Participants

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

FilledTicketPrice TBC
Hilly trail
HeartOutline
Black Mountain 50K 25K and Half Marathon

Saturday, Jun 18, 2022

Black Mountain 50K 25K and Half Marathon

LocationIndicator

San Diego, California

Participants

ultramarathon, 5k

Star5

(1 reviews)

FilledTicketPrice TBC
Great atmosphereHilly trail
HeartOutline
Orange Curtain 100k

Friday, Jun 24, 2022

Orange Curtain 100k

LocationIndicator

Cerritos, California

Participants

ultramarathon, 10k

FilledTicketPrice TBC
Flat road
HeartOutline
Rancho Hills Trail Run

Saturday, Jul 9, 2022

Rancho Hills Trail Run

LocationIndicator

Morgan Hill, California

Participants

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

FilledTicketPrice TBC
Trail
HeartOutline
Salt Point Trail Run & Camping

Saturday, Jul 9, 2022

Salt Point Trail Run & Camping

LocationIndicator

Jenner, California

Participants

ultramarathon

FilledTicketPrice TBC
Hilly trail
HeartOutline
The Peak 50k, Marathon & Half Marathon

Saturday, Jul 16, 2022

The Peak 50k, Marathon & Half Marathon

LocationIndicator

San Diego County, California

Participants

ultramarathon, marathon, half marathon

FilledTicketPrice TBC
Hilly trail
HeartOutline
Kirkwood's Thunder Mountain Trail Challenge

Saturday, Jul 23, 2022

Kirkwood's Thunder Mountain Trail Challenge

LocationIndicator

Markleeville, California

Participants

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

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

Friday, Jul 29, 2022

Never Summer 100k & 60k

LocationIndicator

Walden, Colorado

Participants

ultramarathon

FilledTicketPrice TBC
Flat trail
HeartOutline
Harding Hustle

Saturday, Jul 30, 2022

Harding Hustle

LocationIndicator

Silverado, California

Participants

ultramarathon

FilledTicketPrice TBC
Flat trail
HeartOutline
Kirkwood’s Ultras

Saturday, Aug 6, 2022

Kirkwood’s Ultras

LocationIndicator

Markleeville, California

Participants

ultramarathon, 5k, half marathon, 10k

FilledTicketPrice TBC
Hilly trail
HeartOutline
Skyline 50k

Sunday, Aug 7, 2022

Skyline 50k

LocationIndicator

Castro Valley, California

Participants

ultramarathon, half marathon

FilledTicketPrice TBC
Trail
HeartOutline
Almaden Hills Trail Run

Saturday, Aug 27, 2022

Almaden Hills Trail Run

LocationIndicator

San Jose, California

Participants

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

FilledTicketPrice TBC
Trail
HeartOutline
American Heroes Run

Friday, Sep 9, 2022

American Heroes Run

LocationIndicator

Longmont, Colorado

Participants

marathon, half marathon, 5k, ultramarathon

FilledTicketPrice TBC
Flat road
HeartOutline
Tahoe 100k

Sunday, Sep 11, 2022

Tahoe 100k

LocationIndicator

South Lake Tahoe, California

Participants

ultramarathon

FilledTicketPrice TBC
Great sceneryHilly trail
HeartOutline
That's No Moon

Saturday, Sep 24, 2022

That's No Moon

LocationIndicator

Silverado, California

Participants

ultramarathon

FilledTicketPrice TBC
Flat trail
HeartOutline
Dick Collins Firetrails

Saturday, Sep 24, 2022

Dick Collins Firetrails

LocationIndicator

Castro Valley, California

Participants

ultramarathon, marathon

FilledTicketPrice TBC
Trail
HeartOutline
Showing 25 - 48 of 66 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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