Trail ultramarathons in the United States
Find trail ultramarathons in the United States. Compare 330 upcoming events by date and location. Open a race guide for the course, recorded editions and official entry information where available.
Events to explore include Fall Back Blast, Fall Back into the Trails Series and Naatsisaan Trail Races.
Narrow your search to Texas, California and Arizona, or browse the other locations below.
Compare running races by distance, date and surface, from shorter road events to trail races and ultras.
374 listed events · 330 with upcoming dates
Upcoming ultramarathons
330 matching events, earliest date first. Entry availability is shown separately.
Fall Back Blast
USAEau Claire, Wisconsin
An autumn trail running festival at Lowes Creek County Park, with five solo distances and a 50K relay.
Date listed · latest organiser confirmation not yet checked.
Fall Back into the Trails Series
USALagrangeville, New York
Trail races on a hilly 10K loop at Red Wing Recreation Area. The 100K starts on Saturday afternoon; the 50K and 10K start on Sunday morning.
Date listed · latest organiser confirmation not yet checked.
Naatsisaan Trail Races
USANavajo Mountain, Utah
Trail and dirt-road races from Navajo Mountain High School, with a mountain ultra, ten-mile race and afternoon community 5K.
Date listed · latest organiser confirmation not yet checked.
Pumpkin Butt
USAKennesaw, Georgia
A free 50K club trail run for GUTS members, using five approximately 10K loops. The organiser classifies this as an unofficial run because of permit…
Date listed · latest organiser confirmation not yet checked.
Terror Trails Ultra
USAWaxhaw, North Carolina
Halloween trail races at Cane Creek Park, ranging from a short woodland loop to a two-loop ultra.
Date listed · latest organiser confirmation not yet checked.
Thunder River
USACascade Locks, Oregon
Columbia River Gorge trail races finishing at Marine Park, with a looped 50K and a point-to-point 25K.
Date listed · latest organiser confirmation not yet checked.
Autumn Squatch
USALewis Center, Ohio
Autumn trail races on the Rocks and Roots trails at Alum Creek State Park, using alternating north and south loops.
Date listed · latest organiser confirmation not yet checked.
Fire on the Mountain
USALittle Orleans, Maryland
Trail ultras and a shorter forest race at Green Ridge State Forest, using trails and forest roads from Point Lookout.
Date listed · latest organiser confirmation not yet checked.
Mamba 100
USAMemphis, Tennessee
Ultramarathons and a shorter trail race on the Wolf River trails. Different lead-in sections join a flat woodland loop; each distance has its own start.
Date listed · latest organiser confirmation not yet checked.
tBunk Endurance Challenge
USALaGrange, Wisconsin
Multiple fixed-distance ultras on the Nordic Trail system in the Southern Kettle Moraine State Forest.
Date listed · latest organiser confirmation not yet checked.
Big Texas Ultra
USAJohnson City, Texas
Trail races at Flat Creek Crossing Ranch, with an additional qualification-only championship division for the 100K.
Date listed · latest organiser confirmation not yet checked.
Broken Toe Trail Races
USAWilmington, Ohio
Woodland trail races around Caesar Creek Lake, with rolling hills, creek crossings and one or two laps of the campground trail course.
Date listed · latest organiser confirmation not yet checked.
Chino Hills Trail Run — Fall
USABrea, California
Autumn trail races through chaparral, oak woodland and the hills of Chino Hills State Park.
Date listed · latest organiser confirmation not yet checked.
Conquer the Castle
USAMayfield, Ohio
Trail races through North Chagrin Reservation with woodland loops, creek crossings and a visit to Squire’s Castle.
Date listed · latest organiser confirmation not yet checked.
Deadman Peaks Trail Run
USACuba, New Mexico
High-desert trail races on the Continental Divide Trail near Cuba, crossing mesas, rocky ground and remote woodland.
Date listed · latest organiser confirmation not yet checked.
Dogwood Canyon Trail Runs
USALampe, Missouri
Hilly trail races at Dogwood Canyon, with the 25K and 50K on Saturday and 15K on Sunday. Combined weekend challenges use these same races.
Date listed · latest organiser confirmation not yet checked.
Ferris 50
USAMinden, Nevada
Trail races through Carson Valley, with a separate short children’s race. The adult races start at Douglas County Fairgrounds and finish at TJ’s…
Date listed · latest organiser confirmation not yet checked.
Grand Ridge Trail Run
USAIssaquah, Washington
Forest trail races in the Cascade foothills, with four adult distances and a free children’s run. Distances are approximate; the advertised…
Date listed · latest organiser confirmation not yet checked.
Kessel Run Ultra
USAFruita, Colorado
High-desert trail races on the North Fruita singletrack, with five distances and separate morning starts.
Date listed · latest organiser confirmation not yet checked.
Liberty’s Lost Treasure
USAGuthrie, Oklahoma
Trail races around Liberty Lake, using repeated loops for the longer distances and an out-and-back 5K.
Date listed · latest organiser confirmation not yet checked.
Miner 49er
USADubuque, Iowa
Trail races through Mines of Spain, with woodland paths, prairie sections, stream crossings and views of the Mississippi River.
Date listed · latest organiser confirmation not yet checked.
Mingus Madness 50K
USAPrescott Valley, Arizona
A rugged, minimally supported mountain adventure. The organiser describes this as an unofficial, non-permitted event; the advertised 50K route is…
Date listed · latest organiser confirmation not yet checked.
Mountain Masochist Trail Run
USAMontebello, Virginia
Mountain trail ultras starting and finishing at Montebello Campground in the Blue Ridge Mountains.
· Entry closed
Date listed · latest organiser confirmation not yet checked.
Mountaineer Rumble
USABlacksburg, South Carolina
Trail races on repeated loops of the CCC Multi-Use Trail at Kings Mountain State Park, with distance-specific lead-in sections for the metric ultras.
Date listed · latest organiser confirmation not yet checked.
Natchez Trace Trail Run
USAFranklin, Tennessee
Trail races along the Natchez Trace, with buses from Garrison Creek for the point-to-point shorter distances.
· Entry closed
Date listed · latest organiser confirmation not yet checked.
Pain in Green Lane
USAGreen Lane, Pennsylvania
One- and two-loop trail races around Green Lane’s lake and reservoir, combining singletrack, gravel and paved paths.
Date listed · latest organiser confirmation not yet checked.
Paleozoic Trail Runs - Silurian Fall
USAPalos Park, Illinois
Trail races on the Sag Valley trails, using a 25K loop of gravel paths and woodland sections. The organiser lists the permit as pending.
Date listed · latest organiser confirmation not yet checked.
Pinhoti 100
USAHeflin, Alabama
A point-to-point trail ultramarathon through Talladega National Forest, starting near Heflin and finishing at the Sylaward trailhead at Lake Howard.
· Entry closed
Date listed · latest organiser confirmation not yet checked.
Ponderosa Polar Challenge
USAOrderville, Utah
Trail distances and timed challenges on interchangeable loops at Zion Ponderosa Ranch Resort, near Zion National Park.
Date listed · latest organiser confirmation not yet checked.
Rio Del Lago Endurance Runs
USAGranite Bay, California
Trail ultras starting at Beals Point, following the lakes and foothills between Folsom and Auburn.
Date listed · latest organiser confirmation not yet checked.
Race archive
Past races and previous editions
Looking back at a race? Browse the guides below for recorded editions. This section also includes events awaiting a new date and cancelled editions. Previous editions of races in the upcoming calendar are available through their race guides above.
Open the race archive to browse past events and races awaiting a new date.
View full race archive (44) →