Trail 100k events in the United States
Find trail 100k events in the United States. Compare 73 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 Canyonlands Ultra, Firewater Ultra and Lake Murray Endurance Run.
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.
78 listed events · 73 with upcoming dates
Upcoming 100k events
73 matching events, earliest date first. Entry availability is shown separately.
Canyonlands Ultra
USAMoab, Utah
Desert trail races near Moab, from a 15K course to a 100K ultra.
Date listed · latest organiser confirmation not yet checked.
Firewater Ultra
USAGreenback, East Tennessee
Trail ultras along Tellico Reservoir, with sunrise and sunset starts for the 50K and a shorter running course.
Date listed · latest organiser confirmation not yet checked.
Lake Murray Endurance Run
USAArdmore, Oklahoma
Trail races of several lengths through Lake Murray State Park. Confirm the precise start location in the final briefing: current organiser text…
Date listed · latest organiser confirmation not yet checked.
Camino De Los Muertos
USALewisville, Texas
Trail races at the Lewisville Lake Environmental Learning Area, with five adult distances and a one-mile youth run.
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.
Hell Creek 100
USASylvan Grove, Kansas
Trail races on the Switchgrass trails beside Wilson Lake, including the Pure Hell 140 and shorter solo options. A separate team relay is also offered.
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.
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.
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.
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.
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.
Screaming Monkey
USAKeithville, Louisiana
Technical woodland races on the Monkey Trails surrounding a chimpanzee sanctuary, with shorter races and overnight ultras.
Date listed · latest organiser confirmation not yet checked.
TARC Stone Cat Trail Festival
USAIpswich, Massachusetts
A trail festival on rolling woodland trails in Willowdale State Forest, with adult distance races and a short youth fun run.
· Entry closed
Date listed · latest organiser confirmation not yet checked.
Looking Glass 100K
USAPisgah Forest, North Carolina
A mountain trail ultramarathon around Looking Glass Rock through Pisgah National Forest, including high ridges, waterfalls and stream crossings.
· Entry closed
Date listed · latest organiser confirmation not yet checked.
Red Rock Canyon Ultra
USABlue Diamond, Nevada
Desert trail races through sandstone canyons, washes and Cottonwood Valley near Las Vegas, finishing in Blue Diamond.
Date listed · latest organiser confirmation not yet checked.
Dinosaur Valley Endurance Run
USAGlen Rose, Texas
Trail races over the rocks, roots and rolling hills of Dinosaur Valley State Park, with morning and evening short-course options.
Date listed · latest organiser confirmation not yet checked.
Fall Creek 100
USASpencer, Tennessee
Trail ultras through Fall Creek Falls State Park, passing waterfalls, suspension bridges, forest paths and the lake shoreline.
Date listed · latest organiser confirmation not yet checked.
Fire Fest Ultra
USALogandale, Nevada
Desert trail races through the sandstone scenery of the Logandale Trail System near Valley of Fire, with Saturday and Sunday programmes.
Date listed · latest organiser confirmation not yet checked.
Brazos Bend 100
USANeedville, Texas
Flat trail races through Brazos Bend State Park, with looped ultras, a marathon, a half marathon and a children’s kilometre.
Date listed · latest organiser confirmation not yet checked.
Devil Dog Ultras
USATriangle, Virginia
Looped ultras through Prince William Forest Park, combining wooded singletrack, rolling hills and short fire-road sections.
· Entry closed
Date listed · latest organiser confirmation not yet checked.
Jackson County Ultras
USABrownstown, Indiana
Rugged trail races in Jackson-Washington State Forest with a start and finish at PYOCA Camp and Retreat Center.
Date listed · latest organiser confirmation not yet checked.
Last Chance Ultra
USARogersville, Missouri
Looped ultras on private land near Springfield, with trails, gravel and short paved sections plus a Sunday ten-mile race.
Date listed · latest organiser confirmation not yet checked.
Beast of the East 100
USAKings Mountain, North Carolina
Mountain trail races through Crowders Mountain State Park, starting and finishing at Crowders Ridge.
Date listed · latest organiser confirmation not yet checked.
Run Undead Ultra Trail Party
USAPelham, Alabama
New Year trail races on a five-mile loop at Oak Mountain State Park.
Date listed · latest organiser confirmation not yet checked.
Canyon of the Eagles New Year’s Trail Challenge
USABurnet, Texas
Two days of New Year trail races on the limestone bluffs around Canyon of the Eagles.
Date listed · latest organiser confirmation not yet checked.
Bandera Endurance Trail Race
USABandera, Texas
A weekend of rugged trail races through the Texas Hill Country.
Date listed · latest organiser confirmation not yet checked.
H9 Fierce Dragon
USABlairsville, Georgia
Mountain ultras and shorter trail races based at Vogel State Park.
Date listed · latest organiser confirmation not yet checked.
Coldwater Hundred
USAGoodyear, Arizona
Desert trail races through the foothills of the Sierra Estrella mountains.
Date listed · latest organiser confirmation not yet checked.
The Shippey
USAHigh Ridge, Missouri
A weekend of winter trail races at Beaumont Scout Reservation.
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.
Hellgate
USAFincastle
Hellgate — historical running results.
Next date not listed
Race guide and recorded editions →Mines of Spain 100
USADubuque, Iowa
One-hundred-mile and one-hundred-kilometre races on the trails of the Mines of Spain Recreation Area.
Next date not listed
Race guide and recorded editions →Miwok 100K
USAStinson Beach
Miwok 100K — historical running results.
Next date not listed
Race guide and recorded editions →Ultra Race of Champions
USASkylark
Ultra Race of Champions — historical running results.
Next date not listed
Race guide and recorded editions →Wild Duluth Races
USADuluth, Minnesota
A weekend of rugged trail races around Duluth, with 100 km, 50 km, half-marathon and 10 km options.
Next date not listed
Race guide and recorded editions →Browse states, counties and areas
Choosing a race in United States
The unfiltered upcoming calendar includes events in Johnson City (2), Apple Valley (1), Ardmore (1). Use the town filter to compare locations, then check the race guide for the start venue and organiser’s travel information.
Questions about 100k events in United States
What should I check before a running event in United States?
Choose your distance, then check the route, elevation, cut-off time and entry conditions in the organiser’s race guide.
Which trail 100k events are coming up in the United States?
Canyonlands Ultra is listed for 24 October 2026. Firewater Ultra is listed for 24 October 2026. Lake Murray Endurance Run is listed for 24 October 2026. Check the race guide and organiser’s latest information before making plans.
Where can I find race entry details for the United States?
Follow the link from the race guide to the organiser or entry provider, where one is available. Check the entry deadline, eligibility and current availability there. A listed race date does not necessarily mean entries are still open.
Why has a race moved out of the upcoming calendar?
Once its listed dates have passed, a race moves to the past-editions view unless another upcoming edition is recorded. Cancelled events also leave the upcoming list. The race guide stays available, and the event returns when a new date is added.