Ultramarathon · Country guide

US Ultramarathons

The U.S. ultramarathon calendar spans mountain hundreds, desert crossings, road classics, timed events, and approachable first ultras. Distance alone does not describe the challenge, so this collection helps runners compare date, location, terrain context, and race history across the country.

Showing all 130 races in this collection. Updated August 2026.

Notable race guides: Western States 100, Hardrock 100, Leadville Trail 100 Run, and Badwater 135.

  1. 01Eastern States 100Saturday, August 8, 2026Waterville, PennsylvaniaEastern States 100 is a remote 103-mile Pennsylvania Wilds loop with more than 20,000 feet of climbing and a qualification requirement each August.Guide
  2. 02Bigfoot 200Friday, August 14, 2026Cougar, WashingtonBigfoot 200 is a 207.9-mile point-to-point expedition around Mount St. Helens with huge climbing, remote aid and multi-day logistics in the Cascades.GuideResults
  3. 03Anchorage RunFest 49K UltraSunday, August 16, 2026Anchorage, AlaskaAnchorage RunFest's 49K climbs five significant hills on a certified city-and-greenbelt route capped at 150 runners for its Alaska field each August.Guide
  4. 04Another Dam 50kSunday, August 16, 2026Englewood, OhioFour flat loops through Englewood MetroPark near Dayton make Another Dam 50k one of Ohio's fastest club ultras and a popular first 50k pick.Guide
  5. 05Green Lakes Endurance Runs 100KSaturday, August 22, 2026Fayetteville, New YorkGreen Lakes' runnable 100K circles an eight-mile New York trail loop eight times, mixing shaded lakeshore, steep forest climbs, and exposed meadow miles.GuideResults
  6. 06Green Lakes Endurance Runs 50KSaturday, August 22, 2026Fayetteville, New YorkFour eight-mile loops make Green Lakes a runnable trail 50K, mixing shaded lakeshore paths, short forest climbs, and exposed summer meadows.GuideResults
  7. 07Habanero Hundred 100 MileSaturday, August 22, 2026Cat Spring, TexasHabanero Hundred 100 Mile starts at noon in intense August heat, challenging runners to complete sixteen sandy 10K trail loops at 7IL Ranch.GuideResults
  8. 08Leadville Trail 100 RunSaturday, August 22, 2026Leadville, ColoradoLeadville Trail 100 Run is a high-altitude Colorado out-and-back from Leadville, crossing Hope Pass and topping out near 12,500 feet in thin air.GuideResults
  9. 09Twisted Branch Trail Run 100KSaturday, August 22, 2026Naples, New YorkTwisted Branch covers roughly 102 kilometers point to point across New York's Finger Lakes, linking remote trails from Naples to Hammondsport.Guide
  10. 10Superior 100 MileFriday, September 11, 2026Lutsen, MinnesotaSuperior 100 Mile follows the rugged Superior Hiking Trail from Gooseberry State Park to Lutsen across northeast Minnesota's North Shore in September.GuideResults
  11. 11Wasatch Front 100Friday, September 11, 2026Kaysville, UtahWasatch Front 100 crosses Utah's rugged range from Kaysville to Soldier Hollow, stacking about 24,000 feet of ascent into a strict 36-hour clock.Guide
  12. 12Germantown 50KSaturday, September 12, 2026Germantown, OhioA southwest Ohio trail 50K in its fourth decade, run as four loops of Germantown MetroPark through cedar forest, prairie, and Twin Creek hills.Guide
  13. 13Mogollon Monster 100Saturday, September 12, 2026Pine, ArizonaMogollon Monster 100 covers 102.3 rugged miles along Arizona's Mogollon Rim, with about 15,900 feet of climbing and a 38-hour limit in September.Guide
  14. 14Pine Creek Challenge 100 MileSaturday, September 12, 2026Wellsboro, PennsylvaniaPine Creek Challenge 100 Mile runs four passages through Pennsylvania's Pine Creek Gorge on a scenic, nontechnical and highly runnable rail-trail course.GuideResults
  15. 15Youngstown Ultra Trail ClassicSaturday, September 12, 2026Youngstown, OhioThe Youngstown Ultra Trail Classic has looped Mill Creek Park for about two decades, running a 50K on singletrack past gorges, lakes, and waterfalls.Guide
  16. 16The Rut 50KSunday, September 13, 2026Big Sky, MontanaThe Rut 50K climbs technical mountain terrain around Big Sky and Lone Peak, combining exposed scrambling, steep grades and a capped field each September.Guide
  17. 17Grindstone by UTMB 100MFriday, September 18, 2026Swoope, VirginiaGrindstone by UTMB 100M tackles 104 miles and nearly 21,000 feet of climbing through Virginia's technical Allegheny Mountains each September.Guide
  18. 18Run Rabbit Run 100 MileFriday, September 18, 2026Steamboat Springs, ColoradoRun Rabbit Run 100 combines a tough high-country loop around Steamboat Springs with separate Hare and Tortoise starts and a six-figure prize purse.Guide
  19. 19Barkley Fall Classic 50KSaturday, September 19, 2026Wartburg, TennesseeThe Barkley Fall Classic condenses Frozen Head's steep, rough backcountry character into a one-day 50K with a large but selective field in eastern Tennessee.Guide
  20. 20IMTUF 100Saturday, September 19, 2026McCall, IdahoIMTUF 100 is a rugged mountain hundred around McCall, combining remote Idaho singletrack, sustained climbing and a deeply established ultra community.GuideResults
  21. 21Mountain Lakes 100Saturday, September 19, 2026Olallie Lake, OregonMountain Lakes 100 circles remote Oregon lakes and Cascade forest on a mountain course known for runnable trail and sustained nighttime miles.GuideResults
  22. 22Paris Texas Marathon 100KSaturday, September 19, 2026Paris, TexasA flat rails-to-trails 100K that starts and ends at the Eiffel Tower replica in Paris, Texas, with 50K, marathon, and evening races the same day.Guide
  23. 23Pilot Mountain to Hanging Rock UltraSaturday, September 19, 2026Danbury, North CarolinaA point to point trail ultra across North Carolina's Sauratown Mountains, with a 50 mile flagship from Pilot Mountain to Hanging Rock and a 50K option.Guide
  24. 24Bear 100 MileFriday, September 25, 2026Logan, UtahBear 100 Mile runs point to point from Logan toward Bear Lake, with 22,816 feet of climbing, fall colors and a 36-hour mountain cutoff each autumn.Guide
  25. 25Sangre de Cristo Trail FestivalSaturday, September 26, 2026Westcliffe, ColoradoA high country trail festival on Colorado's Rainbow Trail, with a 104 mile flagship plus 100K, 50 mile, and 50K races from a ranch base near Westcliffe.Guide
  26. 26Sky Island Trail RaceSaturday, September 26, 2026Fort Davis, TexasSky Island sends 50K runners onto mile-high trails in the Davis Mountains near Fort Davis, with about 3,900 feet of climbing and long desert views.Guide
  27. 27The Lakes TrailFestSaturday, September 26, 2026Palmer, AlaskaThe Lakes TrailFest closes Alaska's fall trail season with a 50K, 25K, 10K, and 5K on rolling wooded singletrack at Matanuska Lakes near Palmer.Guide
  28. 28Farm to Farm Ultra 50 MileSunday, September 27, 2026Freeport, MaineFarm to Farm's 50-mile loop race links Wolfe's Neck Center and conservation trails in Freeport, offering repeated aid access on mixed trail.Guide
  29. 29Vermont 50 Ultra RunSunday, September 27, 2026Brownsville, VermontVermont 50 Ultra Run covers fifty miles of private trails, woods roads and steep Green Mountain terrain around Mount Ascutney each early autumn.GuideResults
  30. 30Angeles Crest 100 Mile Endurance RunSaturday, October 3, 2026Altadena, CaliforniaAngeles Crest 100 is a Southern California mountain 100-miler through the San Gabriels, known for heat, altitude swings, and old-school endurance.GuideResults
  31. 31Arkansas Traveller 100Saturday, October 3, 2026Perryville, ArkansasArkansas Traveller 100 is a classic Ouachita endurance run over forest roads and trails, pairing a 100-mile course with a 30-hour limit in early October.GuideResults
  32. 32Cuyamaca 100KSaturday, October 3, 2026Julian, CaliforniaCuyamaca 100K traverses oak woodland, pine forest, chaparral and desert-edge trail near San Diego, with a 19-hour limit and live pods each October.GuideResults
  33. 33Hennepin Hundred 100 MileSaturday, October 3, 2026Sterling, IllinoisHennepin Hundred 100 Mile follows Illinois' historic canal trail from Sterling toward Colona on a flat, fast and highly runnable point-to-point route.GuideResults
  34. 34Whitefish Trail Blazer 50KSaturday, October 3, 2026Whitefish, MontanaAbout 6,300 feet of climbing carries this Montana 50K to the summit of Big Mountain, with proceeds funding Whitefish Trail building and upkeep.Guide
  35. 35HOKA Kodiak Ultra Marathons by UTMB 100MFriday, October 9, 2026Big Bear Lake, CaliforniaKodiak 100M circles Big Bear Valley over 100.6 mountain miles, reaching Sugarloaf and the Pacific Crest Trail with 15,912 feet of gain in October.Guide
  36. 36Moab 240Friday, October 9, 2026Moab, UtahMoab 240 makes one enormous 241.8-mile loop through Utah desert and two mountain ranges, with 31,892 feet of gain, sleep stations, and a 112-hour cutoff.Guide
  37. 37West Virginia TrilogyFriday, October 9, 2026Circleville, West VirginiaThe West Virginia Trilogy stacks a 50K, a 50 mile, and a half marathon across three October days on mountain trails near Spruce Knob in Circleville.Guide
  38. 38Yeti 100 Mile Endurance RunFriday, October 9, 2026Damascus, VirginiaYeti 100 Mile Endurance Run delivers a highly runnable rail-trail hundred through southwest Virginia, centered on the Virginia Creeper Trail.GuideResults
  39. 39CanLake Ultras 50 MileSaturday, October 10, 2026Canandaigua, New YorkA single road loop of Canandaigua Lake in peak fall color, the CanLake 50 mile has anchored Finger Lakes ultrarunning for more than two decades.Guide
  40. 40Le Grizz 50 Mile UltramarathonSaturday, October 10, 2026Polebridge, MontanaRun since 1982 on the gravel North Fork Road along the west edge of Glacier National Park, Le Grizz is one of the oldest 50 mile ultras in the country.Guide
  41. 41Oil Creek 100 MileSaturday, October 10, 2026Titusville, PennsylvaniaOil Creek 100 Mile repeats rugged Gerard Hiking Trail loops near Titusville, accumulating about 17,627 feet of gain under a 32-hour cutoff each year.Guide
  42. 42Ruth Anderson Memorial Endurance RunSaturday, October 10, 2026San Francisco, CaliforniaA choose-your-distance ultra on a certified 4.5-mile Lake Merced loop, where runners hit 50K and decide on the spot whether to press on to 50 miles.Guide
  43. 43The Mammoth Trail RunSaturday, October 10, 2026Glen Rose, TexasThe Mammoth Trail Run puts a 100K and 50K on steep, rocky ranch trails near Glen Rose, Texas, with a 26 hour cutoff that runs deep into the night.Guide
  44. 44Wolverine State 100Saturday, October 10, 2026Petoskey, MichiganA point to point 100 miler across northern Michigan, running Petoskey to Alpena from Lake Michigan to Lake Huron, with 100K, 50K, and relay options.Guide
  45. 45Delaware River Loop Series 100KSaturday, October 17, 2026Titusville, New JerseyRepeated canal-side circuits build this 100K in Titusville, creating a crew-friendly Delaware River ultra with simple logistics and steady pacing.Guide
  46. 46Galveston Ultra Trail 50KSaturday, October 17, 2026Galveston, TexasHard-packed sand replaces singletrack in this point-to-point 50K along the Galveston Island shoreline, run west to east with sunrise over the Gulf.Guide
  47. 47Lake Hodges Trail Festival 50KSaturday, October 17, 2026San Diego, CaliforniaA runnable San Diego 50K on wide dirt trails along Lake Hodges, with the Raptor Ridge climb faced twice on an approachable first-ultra course.Guide
  48. 48Sinnemahone Ultra Trail Run 50KSaturday, October 17, 2026Emporium, PennsylvaniaDeep in the PA Wilds, this 50K links rail trail, dirt road, and Elk State Forest running from Emporium, with 25K and 12K races on the same day.Guide
  49. 49Huntsville Runfest 50KSaturday, October 24, 2026Gurley, AlabamaTwo laps of a climbing 25K loop give this north Alabama trail 50K over 5,000 feet of gain on Two Mountain Trail singletrack above McMullen Cove.Guide
  50. 50Prisoner of War 50KSaturday, October 24, 2026Spartanburg, South CarolinaA trail 50K on the grounds of Camp Croft, the WWII infantry training center turned state park, built as a tribute to prisoners of war and veterans.Guide
  51. 51Hixon 50Sunday, October 25, 2026La Crosse, WisconsinHixon 50 sends ultrarunners up La Crosse's river bluffs twice, packing roughly 8,000 feet of climbing into a 50K of singletrack above the Mississippi.Guide
  52. 52Javelina JundredSaturday, October 31, 2026Fountain Hills, ArizonaJavelina Jundred is a desert 100-miler at McDowell Mountain, blending rolling Sonoran singletrack, loops, heat management, and a party finish.GuideResults
  53. 53Naatsisaan Ultra 50KSaturday, October 31, 2026Navajo Mountain, UtahNaatsisaan's 50K arcs around Lost Mesa from Navajo Mountain High School, combining dirt road, old doubletrack and trail in Diné Bikéyah in remote Utah.Guide
  54. 54Ozark Trail 100 Mile Endurance RunSaturday, October 31, 2026Steelville, MissouriOzark Trail 100 Mile Endurance Run crosses 101 miles of Mark Twain National Forest on remote singletrack with about 12,000 feet of rugged climbing.GuideResults
  55. 55Pinhoti 100Saturday, November 7, 2026Sylacauga, AlabamaPinhoti 100 follows a rugged point-to-point line across Alabama's highest terrain, combining long singletrack, jeep roads and rocky forest ridges.GuideResults
  56. 56Rio Del Lago 100 MileSaturday, November 7, 2026Folsom, CaliforniaRio Del Lago 100 Mile starts at Beal's Point and crosses Sierra foothill trails east of Sacramento, returning for its twenty-fifth running each November.GuideResults
  58. 58RYR Endurance 50KSaturday, November 14, 2026Owensboro, KentuckyA flat 50K on paved greenway loops in Owensboro, Kentucky, with aid roughly every mile, easy crew access, and a weekend of shorter distances.Guide
  59. 59Tunnel Hill 100 MileSaturday, November 14, 2026Vienna, IllinoisTunnel Hill 100 Mile uses the flat, fast Tunnel Hill State Trail in southern Illinois, a course known for elite times and record attempts each November.GuideResults
  60. 60Dinosaur Valley 100 MileSaturday, November 21, 2026Glen Rose, TexasDinosaur Valley 100 Mile loops through a North Texas state park, accumulating gradual climbs and technical fatigue across rocky, mixed trail.GuideResults
  61. 61Hit The Road, Jack! 50KSaturday, November 21, 2026Carthage, MissouriMissouri's RRCA 50K state championship runs out-and-back on the flat, shaded Ruby Jack rail-trail in Carthage, with certified splits and cash prizes.Guide
  62. 62JFK 50 MileSaturday, November 21, 2026Boonsboro, MarylandJFK 50 Mile blends rocky Appalachian Trail, flat C&O Canal towpath, and rolling Maryland roads in one of America's oldest and fastest ultramarathons.Guide
  63. 63Colorado River Run 100 MileFriday, November 27, 2026Marble Falls, TexasA Thanksgiving weekend trail ultra at Turkey Bend on the Texas Colorado River, running 100 mile and 50 mile races before Saturday's 50K and marathon.Guide
  64. 64Bigfoot 50KSaturday, December 5, 2026Kimbolton, OhioBigfoot 50K closes the Ohio trail season in December at Salt Fork State Park, where three hilly bridle-trail loops usually come with serious mud.Guide
  65. 65Brazos Bend 100 MileSaturday, December 5, 2026Needville, TexasBrazos Bend 100 Mile uses flat crushed-rock and park trails in coastal Texas, with alligators, a 32-hour limit and Western States demand each December.GuideResults
  66. 66Crooked Creek Ultra 100 MileSaturday, December 5, 2026Shepherdsville, KentuckyEight laps of a hilly 12.7-mile loop make up this December 100 miler at Camp Crooked Creek south of Louisville, with 2,300 feet of climb per lap.Guide
  67. 67Jackson County Ultras 100KSaturday, December 5, 2026Brownstown, IndianaA December 100K through the ridges of Jackson-Washington State Forest in southern Indiana, with about 9,200 feet of climbing and a 24-hour cutoff.Guide
  68. 68Ray Miller 50 MilerSaturday, December 5, 2026Malibu, CaliforniaRay Miller's 50-mile course brings nearly 14,000 feet of gain and loss to Point Mugu trails, with ocean views, steep fire roads, and a 15-hour limit.GuideResults
  69. 69Ray Miller 50KSaturday, December 5, 2026Malibu, CaliforniaThe Ray Miller 50K packs nearly 6,000 feet of gain and loss into Point Mugu State Park, with exposed ridges, ocean views, and steep coastal trails.GuideResults
  70. 70San Joaquin River Trail 50KSaturday, December 5, 2026Friant, CaliforniaA December trail 50K along Millerton Lake and the San Joaquin River, with about 5,500 feet of climbing on Sierra foothill singletrack near Fresno.Guide
  71. 71Daytona 100Saturday, December 12, 2026Jacksonville Beach, FloridaDaytona 100 follows Florida's Atlantic barrier island from Jacksonville Beach toward Ponce Inlet on a paved, point-to-point 100-mile route each December.Guide
  72. 72Desert Solstice 100 MileSaturday, December 19, 2026Phoenix, ArizonaDesert Solstice 100 Mile is an elite invitational track ultra in Phoenix, designed for precise pacing, fast splits, records and national-team standards.GuideResults
  73. 73Across the Years 100 MileMonday, December 28, 2026Peoria, ArizonaAcross the Years 100 Mile offers a fixed-distance ultra within a six-day New Year running festival on a compact, accurately measured desert loop.GuideResults
  74. 74Avalon Benefit 50 MileSaturday, January 9, 2027Avalon, CaliforniaAvalon Benefit 50 Mile crosses Catalina Island on a historic trail-ultra route, pairing steep, rugged interior terrain with Pacific Ocean views.GuideResults
  75. 75Bandera 100KSaturday, January 9, 2027Bandera, TexasBandera 100K delivers two rocky Texas Hill Country loops where steep short climbs, loose footing, and sharp sotol make every mile more technical.GuideResults
  76. 76Salem Lakeshore Frosty Fifty 50KSaturday, January 9, 2027Winston-Salem, North CarolinaFour 12.5K loops of wide, rolling dirt trail around Salem Lake give Winston-Salem a January 50K with 25K, 12.5K, relay, and night 5K options nearby.Guide
  77. 77San Diego 50 MileSaturday, January 9, 2027Escondido, CaliforniaSan Diego County's midwinter 50 miler runs San Pasqual Valley single track and fire road near Escondido, topped by a long climb to Raptor Ridge.Guide
  78. 78HURT 100Saturday, January 16, 2027Honolulu, HawaiiHURT 100 packs 24,500 feet of climbing into rooty Oahu rainforest loops, with tropical humidity, stream crossings, and a demanding 36-hour cutoff.GuideResults
  79. 79Go Very Long 50KSaturday, January 23, 2027Tulsa, OklahomaTulsa's paved River Parks trail keeps this winter 50K mostly flat, with two passes over its principal hill and a 9.5-hour time limit on race day.Guide
  80. 80Frozen 50KSaturday, February 6, 2027Cassadaga, New YorkTen laps around Cassadaga's Lower Lake make up this no-frills 50K fundraiser, with flexible distance choices and no formal cutoff clock in winter.Guide
  81. 81Rocky Raccoon 100Saturday, February 6, 2027Huntsville, TexasRocky Raccoon 100 is a fast, crew-friendly Texas hundred built from five forest loops, where roots and accumulated fatigue replace mountain-sized climbs.GuideResults
  82. 82Black Canyon 100KSaturday, February 13, 2027Mayer, ArizonaBlack Canyon 100K runs point-to-point through central Arizona desert from Mayer toward Phoenix, with fast net downhill miles and rugged trail sections.GuideResults
  83. 83Woolley Trail Runs 50KSaturday, February 13, 2027Sedro Woolley, WashingtonA slight uphill outbound grade and matching downhill return define this low-key 50K on a railroad-grade gravel trail near Sedro-Woolley in winter.Guide
  84. 84David's Trail Endurance Run 50KSaturday, February 27, 2027Mountain Home, ArkansasRocky singletrack above Lake Norfork gives David's Trail Endurance Run 50K nearly 5,000 feet of elevation change and a hard late-winter Ozark test.Guide
  85. 85Lake Vian Hilltop Run 100 MileSaturday, February 27, 2027Vian, OklahomaLake Vian's two-mile loop mixes pavement and wooded singletrack, bringing 100-mile runners past aid and the cheer zone on every Oklahoma circuit.Guide
  86. 86ChesCo Race Fest 50KSaturday, March 6, 2027Wayne, PennsylvaniaChesCo Race Fest builds its 50K from a flat 1.25-mile park loop, giving crews constant access and runners heated bathrooms between winter laps.Guide
  87. 87Crazy Desert Trail Race 100KSaturday, March 6, 2027San Angelo, TexasDesert singletrack at San Angelo State Park, where a March 100K crosses cactus flats and rocky hills with aid every few miles and a 24-hour limit.Guide
  88. 88Hachie 50Saturday, March 6, 2027Waxahachie, TexasHachie 50 is a flat, fast 50 miler on tree-lined park paths in Waxahachie, a club-run March race that suits first 50s and time goals in equal measure.Guide
  89. 89The Pistol UltraSaturday, March 13, 2027Alcoa, TennesseeThe Pistol Ultra is a fast paved greenway loop race in Alcoa, Tennessee, with 50K through 100 mile fields, a night 50 miler, and easy crew access.Guide
  90. 90Blackbeard's Revenge 100Saturday, March 20, 2027Corolla, North CarolinaBlackbeard's Revenge 100 runs the full length of the Outer Banks from Corolla to Hatteras, a paved point-to-point 100 miler ruled by coastal wind.Guide
  91. 91Umstead 100Saturday, April 3, 2027Raleigh, North CarolinaUmstead 100 gives runners a supported 100-mile loop race through William B. Umstead State Park near Raleigh, with a generous 30-hour time limit.GuideResults
  92. 92OAT Run 50KSaturday, April 10, 2027Port Angeles, WashingtonThe OAT Run 50K is an out-and-back on Olympic Adventure Trail singletrack, threading mossy forest between Olympic National Park and the Strait.Guide
  93. 93Zion 100 MileSaturday, April 10, 2027Apple Valley, UtahZion 100 Mile crosses high-desert mesas, slickrock, technical singletrack and exposed rim country near Zion National Park in rugged southern Utah.GuideResults
  94. 94Canyons 100MFriday, April 23, 2027Auburn, CaliforniaCanyons 100M is a Sierra foothills UTMB World Series Major from China Wall to Auburn, built around runnable climbs, canyons, and Western States terrain.GuideResults
  95. 95Canyons 100KSaturday, April 24, 2027Auburn, CaliforniaCanyons 100K is a competitive Auburn-area ultra with China Wall start lines, canyon descents, UTMB Major status, and Western States stakes in spring.GuideResults
  96. 96Thumb Coast UltraSaturday, April 24, 2027Caseville, MichiganThumb Coast Ultra runs 50 miles point to point across Michigan's Thumb from Harbor Beach to Caseville, mostly on quiet dirt roads, with a 50K option.Guide
  97. 97Spokane River Run 50KSunday, April 25, 2027Nine Mile Falls, WashingtonOne of the Pacific Northwest's older trail events, Spokane River Run builds its 50K through riverside singletrack on a volunteer-led race day.Guide
  98. 98Greenland Trail 50KSaturday, May 1, 2027Larkspur, ColoradoGreenland Trail 50K runs four laps of smooth doubletrack across a Colorado open space, a fast and runnable spring ultra with Pikes Peak in view all day.Guide
  99. 99Cocodona 250Sunday, May 2, 2027Black Canyon City, ArizonaCocodona 250 is a multi-day Arizona trail ultra from Black Canyon City to Flagstaff, with 250-plus miles, massive climbing, and live tracking demand.GuideResults
  100. 100Traverse City Trail Running Festival 100KSaturday, May 8, 2027Traverse City, MichiganThe 100K at Traverse City Trail Running Festival mixes Pere Marquette Forest singletrack and doubletrack from a compact Timber Ridge base near Traverse City.Guide
  101. 101KEYS100 100 MileSaturday, May 15, 2027Key Largo, FloridaKEYS100 100 Mile runs point to point from Key Largo to Key West, crossing the tropical island chain on exposed roads and bridges beside the ocean.GuideResults
  102. 102Massanutten Mountain Trails 100Saturday, May 15, 2027Fort Valley, VirginiaMassanutten Mountain Trails 100 is a rocky Shenandoah Valley mountain race with more than 18,000 feet of rugged climbing and a 36-hour cutoff.GuideResults
  103. 103Highball to Thurmond 50 MileSunday, May 16, 2027Thurmond, West VirginiaA point-to-point 50 miler across New River Gorge National Park that ends in the near-empty rail town of Thurmond, with an Amtrak ride back to the start.Guide
  104. 104MoMoFo 100KFriday, June 4, 2027Martinsville, IndianaAn evening-start 100K in Indiana's Morgan-Monroe State Forest with 8,500 feet of climbing, mostly singletrack, and a night of June heat and humidity.Guide
  105. 105Scout Mountain Ultras 100 MileFriday, June 4, 2027Pocatello, IdahoScout Mountain's 102.5-mile Idaho course climbs more than 21,000 feet through rugged forest terrain, unpredictable weather, and a Hardrock qualifier.GuideResults
  106. 106Rabid Raccoon 100Saturday, June 5, 2027Beaver Falls, PennsylvaniaEight loops through Brady's Run Park make up this western Pennsylvania 100 miler, a June race with 100K, relay, and half marathon options on one course.Guide
  107. 107Scout Mountain Ultras 50 MileSaturday, June 5, 2027Pocatello, IdahoA midnight start sends Scout Mountain's 54.3-mile field through Idaho mountain trails, more than 10,000 feet of climbing, and likely snow or mud.GuideResults
  108. 108Scout Mountain Ultras 50KSaturday, June 5, 2027Pocatello, IdahoScout Mountain's 36.2-mile 50K climbs about 7,400 feet above Pocatello, pairing long singletrack stretches with high-country snow and a 16-hour cutoff.GuideResults
  109. 109Shadow of the Giants 50KSaturday, June 5, 2027Fish Camp, CaliforniaShadow of the Giants sends 50K runners through Sierra National Forest trails, with spaced aid, an eight-hour cutoff and early-start option for late finishers.Guide
  110. 110Summer Trail Fest Ultra 50 MileSaturday, June 12, 2027Laingsburg, MichiganSmooth, well-marked singletrack and generous cutoffs make this Sleepy Hollow State Park 50-miler approachable for a first long ultra in Michigan.Guide
  111. 111Tahoe 200Monday, June 21, 2027Homewood, CaliforniaTahoe 200 makes a multi-day circuit around Lake Tahoe, combining more than 200 miles of remote high-altitude trail across California and Nevada.GuideResults
  112. 112Western States 100Saturday, June 26, 2027Olympic Valley, CaliforniaWestern States 100 is a landmark point-to-point California trail ultra from Olympic Valley to Auburn, with huge climbs, lottery entry, and race-week tracking.GuideResults
  113. 113Finger Lakes 50s 50 MileSaturday, July 3, 2027Projected dateHector, New YorkFinger Lakes 50s sends its 50-mile field through three forest loops, cow pastures, slippery boardwalks, and roughly 3,900 feet of climbing in Hector.GuideResults
  114. 114Finger Lakes 50s 50KSaturday, July 3, 2027Projected dateHector, New YorkTwo 16.5-mile loops give the Finger Lakes 50K a muddy, runnable mix of singletrack, cow pastures, dirt roads, and about 2,600 feet of climbing.GuideResults
  115. 115Hardrock 100Friday, July 9, 2027Silverton, ColoradoHardrock 100 is a 101.8-mile San Juan Mountains loop from Silverton with 33,441 feet of climbing, high passes, and a remote alpine finish at the rock.GuideResults
  116. 116Yellowstone Park 50KSaturday, July 10, 2027West Yellowstone, MontanaYellowstone Park's 50K rolls across Rendezvous ski trails and gravel near West Yellowstone, with wildlife country and an eight-hour window at altitude.Guide
  117. 117Cascade Crest 100Friday, July 16, 2027Easton, WashingtonCascade Crest 100 combines Pacific Crest Trail miles, a long railroad tunnel and about 23,000 feet of gain in Washington's Cascades each summer.GuideResults
  118. 118High Lonesome 100Friday, July 16, 2027Nathrop, ColoradoHigh Lonesome 100 loops through Colorado’s Sawatch Range with five alpine passes, 23,300 feet of climbing, and a 37-hour cutoff at high altitude.GuideResults
  119. 119Bob Marshall 50KSaturday, July 17, 2027Seeley Lake, MontanaThe Bob Marshall 50K blends Seeley Creek ski trails, rugged singletrack and Forest Service roads beside Montana's Bob Marshall Wilderness near Seeley Lake.Guide
  120. 120Badwater 135Monday, July 19, 2027Lone Pine, CaliforniaBadwater 135 crosses Death Valley to Mt. Whitney, asking runners to cover 135 road miles, extreme heat, and three major climbs from start to finish.GuideResults
  121. 121Oregon Cascades 100Saturday, July 24, 2027Bend, OregonOregon Cascades 100 links high-desert terrain and Cascade forest on a point-to-point 100-mile trail journey finishing near Bend in Central Oregon.GuideResults
  122. 122Never Summer 100KSaturday, July 31, 2027Gould, ColoradoNever Summer 100K spends 65.7 miles high in Colorado's State Forest State Park, with 14,500 feet of gain, alpine peaks and a strict 24-hour limit.GuideResults
  123. 123Extraterrestrial Full Moon 51KLatest tracked: Sunday, August 2, 2026Rachel, NevadaThis midnight 51K follows Nevada's Extraterrestrial Highway near Area 51, combining high-desert elevation, darkness and a full-moon atmosphere.GuideResults
  124. 124Sheep Mountain 50 MileLatest tracked: Saturday, August 1, 2026Fairplay, ColoradoThe Sheep Mountain 50 Mile averages over 10,600 feet above Fairplay, Colorado, mixing technical trail with remote forest roads high over South Park.GuideResults
  125. 125Waldo 100KLatest tracked: Saturday, August 1, 2026Oakridge, OregonWaldo 100K is a remote Oregon mountain loop over Fuji, the Twins and Maiden Peak, combining high-country singletrack with a 20-hour limit each summer.GuideResults
  126. 126Lean Horse 100 MileLatest tracked: Friday, July 31, 2026Custer, South DakotaLean Horse 100 Mile follows the George S. Mickelson Trail through South Dakota's Black Hills on a runnable crushed-limestone rail-trail route.GuideResults
  127. 127Burning River 100 MileLatest tracked: Saturday, July 25, 2026Cuyahoga Falls, OhioBurning River 100 Mile crosses northeast Ohio parks and trails on an out-and-back endurance course with roughly 8,000 feet of climbing in midsummer.GuideResults
  128. 128Speedgoat 50KLatest tracked: Saturday, July 25, 2026Snowbird, UtahSpeedgoat 50K climbs 11,318 feet around Snowbird, linking steep ski-area trails, 11,000-foot summits, rocky descents, and a hard 13-hour cutoff.GuideResults
  129. 129Dawg Gone Long Run 50 MileLatest tracked: Saturday, July 11, 2026Waynesville, OhioDawg Gone Long gives 50-mile runners a generous 14.5-hour cutoff on hot summer trails, with cupless aid and mandatory carried hydration all day.GuideResults
  130. 130Last Stand 1776 Backyard UltraLatest tracked: Saturday, June 13, 2026Midlothian, VirginiaLast Stand 1776 follows the backyard format: a 4.18-mile loop every hour until one runner remains, with proceeds supporting military families.GuideResults