Ultramarathons

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.
Showing 577 - 624 of 669 events
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  • OCT5

    Swamp Rabbit Urban Ultra 50K

    Greenville, SC, United States
    • Running
    • Ultramarathon
  • NOV9

    Run The Rock

    Terrebonne, OR, United States
    • Running
    • Half Marathon
    • Ultramarathon
  • JAN18

    David’s Trail Endurance Run

    Mountain Home, AR, United States
    • Running
    • Ultramarathon
  • APR4

    American River 50-mile Endurance Run

    Sacramento, CA, United States

    American River has become the second largest 50 miler in the United States. The race attracts both veterans and novices alike. Whether you are attempting...

    • Running
    • Half Marathon
    • Ultramarathon
  • APR18

    Flint Hills 50 Mile & Marathon

    Manhattan, KS, United States
    • Running
    • Ultramarathon
  • OCT12

    Lake Tahoe Marathon

    South Lake Tahoe, CA, United States

    Our boutique races run on Friday, Saturday, and Sunday where everyone knows your name. Lots to choose from: run the Friday Lakeside Marathon or the...

    $49 - $100
    • Running
    • Half Marathon
    • Marathon
    • Ultramarathon
    • 10k
    • 5k
  • APR11

    Rattler Trail Race

    Colorado Springs, CO, United States

    Rattler was created to feature one of Colorado Springs best city parks, Palmer Park. Runners will enjoy views of the city and Pikes Peak from the sandstone...

    • Running
    • 10k
    • Ultramarathon
  • MAY9

    Run for Kids Challenge

    Pelham, AL, United States
    • Running
    • 10k
    • Ultramarathon
  • OCT19

    Way's Bluff

    Madison County, MS, United States
    • Running
    • Ultramarathon
  • NOV23

    Regal Beagle Ultra

    Summit County, OH, United States

    The Regal Beagle Ultra is a 50k, 25k, and 5 mile course that highlights the best of the 404 acre Bath Nature Preserve and the 41 acre Bath Community Park ....

    $35 - $60
    • Running
    • Ultramarathon
  • OCT13

    Green Monster Trail Challenge

    Wellsboro, PA, United States

    A trail challenge designed for both runners and hikers of all ages, showcasing the

    mountains of the Tioga State Forest located in Wellsboro,...

    $50 - $80
    • Running
    • Ultramarathon
  • MAR28

    Southwest 100

    Fort Davis, TX, United States
    • Running
    • 5k
    • 10k
    • Half Marathon
    • Ultramarathon
  • DEC14

    Lookout Mountain 50 Miler

    Chattanooga, TN, United States

    The Lookout Mountain trail races begin high atop the mountain at the spectacular Covenant College campus. The course offers a variety of challenging climbs,...

    $35 - $95
    • Running
    • Ultramarathon
    • 10k
  • JUN4

    Mockingbird Marathon

    Erwin, TN, United States
    • Running
    • Half Marathon
    • 10k
    • Ultramarathon
    • 5k
  • OCT19

    Walking Tall 50/25K

    Pocahontas, TN, United States
    • Running
    • Ultramarathon
  • JUN3

    Bee Rock Tunnel Marathon

    Appalachia, VA, United States
    • Running
    • Ultramarathon
    • 5k
    • 10k
    • Half Marathon
  • APR11

    Lake McMurty Run

    Stillwater, OK, United States
    • Running
    • 5k
    • Ultramarathon
  • OCT19

    Oktoberfest Trail Run Festival

    Farmersville, TX, United States
    • Running
    • Half Marathon
    • 5k
    • Ultramarathon
    • 10k
  • OCT20

    Trail du Grand Duc (Quebec)

    Lac-Delage, QC, Canada
    • Running
    • Ultramarathon
  • APR11

    Save Mount Diablo Trails Challenge

    Walnut Creek, CA, United States

    For over 40 years, Save Mount Diablo has worked tirelessly to preserve and increase the open space on and around Mount Diablo. In that time, their efforts...

    $40 - $125
    • Running
    • 5k
    • 10k
    • Ultramarathon
    • Half Marathon
  • OCT6

    Three Sisters Skyline

    Sisters, OR, United States
    • Running
    • Half Marathon
    • Ultramarathon
  • SEP28

    Conquer the Castle

    Willoughby Hills, OH, United States

    Beautiful course in North Chagrin Reservation, Willoughby Hills, Ohio. Course consists of bridle path and single track trails, with approx. 2 miles of...

    $60
    • Running
    • Ultramarathon
  • FEB22

    Reverse Ring Winter Massanutten Trail Circuit Run - Semi Invitational

    Front Royal, VA, United States
    • Running
    • Ultramarathon
  • JAN25

    Arches Ultra

    Moab, UT, United States
    • Running
    • Half Marathon
    • Ultramarathon
  • JAN4

    Swamp Forest Trail Run

    Tallahassee, FL, United States

    The brain child of Bobby York, this event winds through both single-track and multi-use trails in Elinor Klapp-Phipps Park, including the Swamp Forest, Coon...

    • Running
    • Half Marathon
    • Ultramarathon
  • OCT12

    Rock/Creek Stump Jump Trail Race

    Chattanooga, TN, United States

    50K & 10 Miler- Saturday, October 12th. The premier 50K trail race in the Southeast, the Rock/Creek StumpJump 50K presented by The North Face, takes...

    $70 - $95
    • Running
    • Ultramarathon
  • OCT5

    Bay Ridge 100K

    Castro Valley, CA, United States

    Run for the last few years as Bay Ridge Endurance Runs, we are proud to announce that we're returning to our classic name: Dick Collins Firetrails!...

    $85 - $160
    • Running
    • Ultramarathon
    • Marathon
  • MAR7

    Way Too Cool 50K Endurance Run

    Cool, CA, United States
    • Running
    • Ultramarathon
  • JUN27

    Western States Endurance Run

    Olympic Valley, CA, United States
    • Running
    • Ultramarathon
  • MAR21

    Spring Rat Race

    Ocean Township, NJ, United States
    • Running
    • Ultramarathon
    • 10k
  • OCT6

    Green Bulldog Dash 5k, 1 Mile Fun Run and 200 Meter Dash

    Uniontown, OH, United States
    • Running
    • 5k
    • Ultramarathon
  • FEB1

    Hoka One One Rocky Raccoon 100 Endurance Trail Run

    New Waverly, TX, United States
    • Running
    • Ultramarathon
  • NOV9

    Colossal-Vail 50/50

    Vail, AZ, United States
    • Running
    • Ultramarathon
  • SEP29

    Vermont 50 Ultra Run

    West Windsor, VT, United States
    • Running
    • Ultramarathon
  • MAR14

    Bel Monte Endurance Races

    Lyndhurst, VA, United States
    • Running
    • Ultramarathon
  • FEB21

    POSTOAK Lodge Challenge

    Tulsa, OK, United States
    • Running
    • Ultramarathon
    • Half Marathon
  • JAN25

    Skydive Ultra Florida

    Clewiston, FL, United States
    • Running
    • 10k
    • Half Marathon
    • Ultramarathon
  • OCT12

    Elevate 50K

    Louisville, KY, United States
    • Running
    • Ultramarathon
    • 5k
  • OCT12

    Defiance 50 K 30 K 15 K

    Tacoma, WA, United States
    • Running
    • Ultramarathon
  • MAR7

    SARR Prickly Pear 50 K 15 K 5 K

    San Antonio, TX, United States
    • Running
    • 5k
    • Ultramarathon
  • OCT11

    Moab 240

    Moab, UT, United States
    • Running
    • Ultramarathon
  • JAN5

    Willis River 50 K

    Cumberland, VA, United States
    • Running
    • Ultramarathon
  • JAN25

    Chehaw Challenge

    Albany, GA, United States
    • Running
    • Ultramarathon
  • DEC7

    Mc Dowell Mountain Frenzy Trail Runs

    Fountain Hills, AZ, United States
    • Running
    • 10 Miles
    • Ultramarathon
  • OCT26

    Lake Murray Endurance Run

    Ardmore, OK, United States
    • Running
    • Ultramarathon
  • MAY24

    Ochoco Trail Runs

    Prineville, OR, United States
    • Running
    • Ultramarathon
  • DEC14

    Hellgate 100 K

    Fincastle, VA, United States
    • Running
    • Ultramarathon
  • JAN18

    Daufuskie Island Ultra Marathon

    Daufuskie Island, SC, United States
    • Running
    • Half Marathon
    • Ultramarathon
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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.