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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
Ultra Trails Lake Tahoe 100 mile, 50 mile, 50k, 25k and VK

Sunday, Sep 25, 2022

Ultra Trails Lake Tahoe 100 mile, 50 mile, 50k, 25k and VK

LocationIndicator

Truckee, California

Participants

ultramarathon, 5k

FilledTicketPrice TBC
Hilly trail
HeartOutline
Ruth Anderson Memorial Endurance Run

Saturday, Oct 8, 2022

Ruth Anderson Memorial Endurance Run

LocationIndicator

San Francisco, California

Participants

ultramarathon

FilledTicketPrice TBC
Trail
HeartOutline
Indian Creek Fifties

Saturday, Oct 15, 2022

Indian Creek Fifties

LocationIndicator

Sedalia, Colorado

Participants

ultramarathon

FilledTicketPrice TBC
Hilly trail
HeartOutline
Spooner's Cove Trail Run

Sunday, Oct 16, 2022

Spooner's Cove Trail Run

LocationIndicator

San Luis Obispo County, California

Participants

ultramarathon

FilledTicketPrice TBC
Hilly trail
HeartOutline
South Hills Single Track Trail Run (September)

Monday, Oct 17, 2022

South Hills Single Track Trail Run (September)

LocationIndicator

San Jose, California

Participants

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

FilledTicketPrice TBC
Hilly trail
HeartOutline
Almaden Hills Trail Run (November)

Saturday, Nov 5, 2022

Almaden Hills Trail Run (November)

LocationIndicator

San Jose, California

Participants

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

FilledTicketPrice TBC
Hilly
HeartOutline
Peninsula Trail Running Festival

Saturday, Nov 19, 2022

Peninsula Trail Running Festival

LocationIndicator

Redwood City, California

Participants

ultramarathon, marathon, half marathon

FilledTicketPrice TBC
Hilly trail
HeartOutline
Sly Park Lake Trail Run (November)

Saturday, Nov 19, 2022

Sly Park Lake Trail Run (November)

LocationIndicator

Pollock Pines, California

Participants

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

FilledTicketPrice TBC
Hilly trail
HeartOutline
No Name 5030

Saturday, Dec 3, 2022

No Name 5030

LocationIndicator

Agoura Hills, California

Participants

5k, ultramarathon

FilledTicketPrice TBC
Great sceneryFlat trail
HeartOutline
Calero Trail Run (Winter)

Saturday, Dec 3, 2022

Calero Trail Run (Winter)

LocationIndicator

San Jose, California

Participants

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

FilledTicketPrice TBC
Hilly trail
HeartOutline
Anza Borrego Cuyamaca 50 Mile

Saturday, Dec 3, 2022

Anza Borrego Cuyamaca 50 Mile

LocationIndicator

Julian, California

Participants

ultramarathon

FilledTicketPrice TBC
Flat trail
HeartOutline
Sawmill Trail Runs

Saturday, Dec 10, 2022

Sawmill Trail Runs

LocationIndicator

Golden, Colorado

Participants

ultramarathon

FilledTicketPrice TBC
Great sceneryTrail
HeartOutline
Audi Power of Four Trail Run

Saturday, Jul 9, 2022

Audi Power of Four Trail Run

LocationIndicator

Aspen, Colorado

Participants

ultramarathon, 10k

FilledTicketPrice TBC
Flat trail
HeartOutline
Lost Coast Trail

Friday, Jun 10, 2022

Lost Coast Trail

LocationIndicator

Leggett, California

Participants

ultramarathon

FilledTicketPrice TBC
Great sceneryHilly trail
HeartOutline
San Diego 200

Friday, Nov 11, 2022

San Diego 200

LocationIndicator

Escondido, California

Participants

ultramarathon

FilledTicketPrice TBC
Flat trail
HeartOutline
Cirque du Griffith Park Runs

Saturday, Sep 3, 2022

Cirque du Griffith Park Runs

LocationIndicator

Los Angeles, California

Participants

ultramarathon

FilledTicketPrice TBC
Trail
HeartOutline
Golden Gate Summer Trail

Saturday, Jul 9, 2022

Golden Gate Summer Trail

LocationIndicator

Mill Valley, California

Participants

ultramarathon, marathon, half marathon

Star4.5

(2 reviews)

FilledTicket$45 – $90
Great atmosphereHilly trail
HeartOutline
Crystal Springs Trail Run (Summer)

Saturday, Jul 30, 2022

Crystal Springs Trail Run (Summer)

LocationIndicator

Woodside, California

Participants

half marathon, ultramarathon, marathon

FilledTicketPrice TBC
Trail
HeartOutline
Showing 49 - 66 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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