The Trail Awaits.

Discover your next adventure. Support the trails that make it possible.

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Jul 25, 2026
  • 5.4M
  • Trail
CO, USA

Youth Trail Running

Find information about youth world championship opportunities, youth certified races, coaches, camps and more.
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Protect Your Event with T.R.I.P. Insurance

We’ve partnered with Nicolas Hill Group to create the Trail Running Insurance Program (T.R.I.P.) – event liability insurance for trail race directors.
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Race Directors

Create a free ATRA race director account to add and directly manage your event pages on our trail race only calendar - the largest on the web!

What You Get as an
ATRA Member

Since 1996, ATRA has been the voice of trail runners everywhere. When you become a member, you're not just joining a community—you're supporting trail access advocacy, sustainable race practices, and the growth of our sport. Together, we protect the trails that make our adventures possible.

Support Trail Advocacy

Your membership funds our work to keep trails open and accessible for all runners.

Get Exclusive Content

Receive Trail Times quarterly newsletter with insider race information, training tips, and community stories.

Connect with Runners

Join a network of passionate trail runners, race directors, and outdoor enthusiasts nationwide.

ATRA Members

The following organizations are proud supporters of the American Trail Running Association.

Single-track Members

  • 2 Lowe Run Company
  • 808 Trail Runners
  • Across Florida 200
  • A1 Ultra Events
  • Alley Trail Classic
  • Aravaipa Running
  • Area 51
  • Arizona Trail Association
  • Ascent Runs
  • Athletic Equation
  • Azteca FC
  • BALS (Be Active. Live Spontaneous.) Racing
  • Banana Slug Backyard Ultra
  • Beast Coast Trail Running
  • Birminghtam Ultra Running Society
  • Bizz Running Company Events
  • Black Wolf Endurance
  • Brazen Racing
  • Broken Arrow Skyrace
  • Charleston County Parks
  • Chase the Sun Running Co
  • Chippewa Trail Races
  • Cirque Series
  • Daybreak Racing
  • DC Peaks
  • Deadwood Mickelson Trail Marathon
  • Dion Snowshoes
  • Driftless Trail Collective
  • Elevation Culture
  • Embark Maple Sap Run Scramble
  • Endless Summer
  • Epic Recess
  • Equip Disciples
  • The Evitt Foundation
  • EX2 Adventures
  • Firebird Trail Races
  • Fit & Able Productions
  • Flat Rock Race Series
  • Florida 48
  • The Florida Run
  • Folsom Run Collective
  • Foy's to Blacktail Trails Organization
  • Geo-Planet - WildMarathon
  • Gila Endurance Runs
  • Gnar Runners
  • Go Beyond Racing
  • Good Endurance
  • Greater Omaha Area Trail Runners (GOATz)
  • HardAssEvents (HAE)
  • High Noon Showdown
  • Himalyan Stage Race
  • Ironwood Adventure Works
  • Jasper Mountain Reserve
  • Kansas City Zoo Run
  • Kenya Wildlife Marathon
  • Kesugi Ridge Traverse
  • Louisville Lovin' the Hills
  • Mad Man Races
  • Mammoth Trail Fest
  • Marathon Majic
  • Massif Running
  • Meandering Turkey
  • Mermaid Trail Run
  • Miwok 100k
  • Mountain Air Productions
  • Mountaineer Rumble Events
  • New River Trail Races
  • One Love Endurance Events
  • Oregon Trail Runs
  • OTG Events
  • Outlaw 100
  • Palmetto Ultras
  • Palo Duro Trail Run
  • Perspective Pacing
  • Phase One
  • PKG Running
  • Powisset Farm Trail Run - Spring
  • Pulse Running Events
  • Rim to River Endurance
  • Rise Racing
  • River City Races
  • Roadless Races
  • Rocking Chair Running
  • Rocky Road Adventures
  • RUN828 Foundation/Hellbender
  • Run Bum Tours
  • Run the Alps
  • Run Uphill Racing
  • Sassquad Trail Running
  • San Antonio Road Runners
  • SEOTR Events
  • Singletrack Sunshine
  • SkyRun
  • Socorro Trail Running Series
  • Storm Sporting Events
  • Stride Soles
  • Stuffed Turkey Endurance Races
  • Suffer Better
  • Sun Trail Running
  • T.E.A.M. Boulder
  • Team Sparkle Productions
  • Tempest Adventures
  • Ten Junk Miles Racing
  • Tejas Trails
  • Texas Outlaw Running Company
  • The Aliza Lapierre Fan Club 50k and 26k
  • TINAR Race Series
  • Trailheads
  • Trail Nerds
  • Trail Roots Running
  • Trail Sisters
  • Treat Public Relations
  • TusseyMountain Back 50
  • Ultimook
  • Upstate Race Series
  • Uwharrie 100 Trail Run
  • Vail Recreation District
  • Vero Beach Octopus Ultra
  • Virginia Adventures
  • Virginia Highlands 3 Day Trail Running Camp
  • West Michigan Whiskey Rollers
  • Western States Endurance Run
  • White Oak Running Company
  • Willenborg Woods Trail Racing
  • Woohoo Trail Fun
  • Ultraverse Supplements
  • Zombie Trail Races

  • Event / Race Members

  • 5VH Trail Run
  • 12 Hours of Lawrence Woods
  • Babbitt's Backyard Ultra Last Man Standing
  • Backyard Ultra of Northern Utah
  • Big Sur Land Trust Race For Open Space
  • Bird Ridge Race
  • Blackwater Canyon Half Marathon
  • Butte's Piss and Moan Runners
  • Caveman Challenge
  • CHANCE 5k Fun Run and Walk
  • Cheyenne Mountain Run
  • Cline Buttes Trail Races
  • Coldwater Trail Race
  • Copper Kings 100
  • Coyote 2 Moon
  • Crazy Bear Ultra
  • Crazy Mountain 100
  • Crawford Sunflower Farm 5k Fun Run
  • Crossover Half
  • Crow Pass Crossing
  • David's Trail Endurance Run
  • Devil Dog Ultras
  • Donald Dash Trail Run
  • Fall Creek Beast
  • Farm Park Challenge
  • FEAR Trail Fest 5 Miler
  • Feed Charlotte 5K
  • Florida Roots Fort Clinch
  • Frigus Snowshoe Race
  • Frosty Cox 6 Hour Trail Race
  • Full Moon Trail Run
  • Galloping Gobbler 4 Miler
  • Granite Mountain Grind
  • Gunstock Trail Run
  • Hardrock Hundred Endurance Run
  • Harmonious Wolf Community Trail Race
  • Helena Ultra Runners League
  • Himanaji Winter Challenge
  • Hoof it for Heifer
  • Hungerford Trail Races
  • Hyak Passage
  • Island View Endurance Run
  • Juneteenth Marathon
  • Jupiter Ridge Sand Spur
  • Kaizen Rite of Passage
  • Kenya Wildlife Marathon
  • Kesugi Ridge Traverse
  • Lag Bon 10K
  • Lake Norman State Park 30K & 50K Trail Race
  • Lake Vian Hilltop Run
  • Laramie Peak Endurance Challenge
  • LATR Backyard Ultra
  • Lazy A Backyard Ultra
  • Lewis Park & Trails
  • The Long Run
  • Lost Lake Run
  • Made for More Ultramarathon
  • Manitou's Revenge
  • Med Bow Rail Marathon and Half Marathon
  • MedWars
  • Mendocino Running Festival
  • Miles for Moms
  • Milwaukee Fire Department
  • Moab Trail Marathon
  • Mountain Tiger Donner Summit
  • Move Free
  • Nanny Goat 3, 6, 12, 24, 100
  • Napa Valley Wilderness Trail Runs
  • NedNed Trail Fest
  • New Glarus Woods Trail Run
  • No Shortcuts TT
  • Off Road Adventures
  • Old Pueblo Endurance Runs
  • Orange Curtain Endurance Run
  • Ouray Ultras
  • PÁLI Peak Trail Run
  • Panther Claw 1776
  • PCCI 5K
  • Poteau Runners
  • Prairie Dog Trail Run
  • Punch Out Ultra
  • Punk Rock Ultras
  • Race in the Clouds Dirt Festival
  • Randolph Ramble
  • Range of Light Trail Races
  • Redding Trail Alliance
  • Red River Ultrafest
  • Riley Park Trail Races
  • River of No Return Endurance Race
  • Run the Ritter
  • Sandlot Marathon
  • Scout Mountain Ultras
  • Shelli Huether Veterans Day Honor Run
  • The Shippey Endurance Runs
  • The Sweaty Backyard Cox Ultra
  • Southwest Vertical Challenge at Az SnowBowl
  • Tapped for Sap 25K
  • Team Jenny 5K
  • The Grit Like CJ 5K
  • The Rabid Squirrel
  • The Ruff
  • Three Eagle Half Marathon & 5K
  • TrailCon
  • Two Rivers Treads/Miners Lady 8-Hour
  • TutHell 50K
  • Ty Draney Endurance
  • Saddles 100
  • Spillway Trail Running
  • Spirit of Magic Valley Runs
  • Swamp Stomper 50K/25K
  • Sylamore Trail 50K – 25K Run
  • Trail of the Dragon
  • Trail Run At Indian Lake
  • TriCord Ranch Foundation
  • Truth or Consequences Desert Ultra
  • Urban Wilderness 50K
  • Vulture Vista Ultra
  • Waldo 100K
  • WausauUltra Events
  • West Almond Trails IMPACT Run/Walk
  • Westfield Ultra
  • West Virginia Trail Fest
  • Whitefish Trail Blazer
  • White Tank Throwdown
  • Wilcox Wild
  • Wild Hope Trail Race
  • Wilson Creek Frozen 50K
  • Winter Wildcat
  • Womp Romp
  • Yellowstone Rendezvous Race

  • The Trail Running Community Needs You

    Whether you're looking for your next race, want to connect with fellow runners, or support trail advocacy—ATRA is your home base for everything trail running.