Marathon calendar — United States

Aug expected3 Legged Monster RaceAug expectedTBDSTEELVILLEUnited States🌤️ 14°₩305,000Entry fee3 Legged Monster RaceAugust 2027 · expected · Steelville, MO, United StatesUltra

Aug expectedTamalpa Headlands 50KAug expectedTBDSAUSALITOUnited States🌤️ 16°₩291,000Entry feeTamalpa Headlands 50KAugust 2027 · expected · Sausalito, CA, United StatesUltra

Aug expectedSierra PrietaAug expectedTBDPRESCOTTUnited States🌤️ 15°₩208,000Entry feeSierra PrietaAugust 2027 · expected · Prescott, AZ, United StatesUltra

Aug expectedWestminster Trail RacesAug expectedTBDWESTMINSTERUnited States🌤️ 10°₩69,000Entry feeWestminster Trail RacesAugust 2027 · expected · Westminster, CO, United StatesUltra

D-310Paavo Nurmi Marathon | Half | Relay | And MoreD-310TBDHURLEYUnited States🧊 7°₩83,000Entry feePaavo Nurmi Marathon | Half | Relay | And MoreSat, August 14, 2027 · Hurley, WI, United StatesMarathonHalf

D-310Eastern States 100D-310OpenEastern States 100Sat, August 14, 2027 · Waterville, PA, United StatesUltra

D-310Dark Horse Trail Series (26.2 - 13.1 - 10k)D-310OpenMILL SPRINGUnited States🌤️ 15°₩42,000Entry feeDark Horse Trail Series (26.2 - 13.1 - 10k)Sat, August 14, 2027 · Mill Spring, NC, United StatesMarathonHalf10K

Aug expectedJigger Johnson UltrasAug expectedTBDWATERVILLE VALLEYUnited States🧊 7°₩194,000Entry feeJigger Johnson UltrasAugust 2027 · expected · Waterville Valley, NH, United StatesUltra

D-311Bound for Boston Marathon & Half Marathon - MinneapolisD-311Not yet openMAPLE GROVEUnited States🌤️ 8°₩90,000Entry feeBound for Boston Marathon & Half Marathon - MinneapolisSun, August 15, 2027 · Maple Grove, MN, United StatesMarathonHalf

Aug expectedNitty Gritty Off Road RaceAug expectedTBDRED LODGEUnited States🧊 4°₩55,000Entry feeNitty Gritty Off Road RaceAugust 2027 · expected · Red Lodge, MT, United StatesMarathonHalf

Aug expectedTwisted Branch Trail RunAug expectedTBDNAPLESUnited States🔥 24°₩402,000Entry feeTwisted Branch Trail RunAugust 2027 · expected · Naples, NY, United StatesUltra

D-317Hell Creek Half & 50kD-317OpenSYLVAN GROVEUnited States🌤️ 13°₩160,000Entry feeHell Creek Half & 50kSat, August 21, 2027 · Sylvan Grove, KS, United StatesUltra

Aug expectedFirebird Trail RacesAug expectedTBDWINDHAMUnited States🌤️ 9°₩69,000Entry feeFirebird Trail RacesAugust 2027 · expected · Windham, ME, United StatesUltra

D-317Olympic Mountains Trail RacesD-317TBDQUILCENEUnited States🌤️ 9°₩76,000Entry feeOlympic Mountains Trail RacesSat, August 21, 2027 · Quilcene, WA, United StatesUltra

D-317Continental Divide Trail RunD-317Not yet openSTEAMBOAT SPRINGSUnited States🧊 3°₩42,000Entry feeContinental Divide Trail RunSat, August 21, 2027 · Steamboat Springs, CO, United StatesUltra

Aug expectedShawnee Hills Trail RacesAug expectedTBDOZARKUnited States🌤️ 15°₩146,000Entry feeShawnee Hills Trail RacesAugust 2027 · expected · Ozark, IL, United StatesHalfUltra

Aug expectedGreen Lakes Endurance RunsAug expectedTBDFAYETTEVILLEUnited States🌤️ 14°₩111,000Entry feeGreen Lakes Endurance RunsAugust 2027 · expected · Fayetteville, NY, United StatesUltra

Aug expectedTrail Run at Sly Park - SummerAug expectedTBDPOLLOCK PINESUnited States🌤️ 13°₩76,000Entry feeTrail Run at Sly Park - SummerAugust 2027 · expected · Pollock Pines, CA, United StatesUltra

Aug expectedSummer's Done 13.1Aug expectedTBDCARYUnited States☀️ 16°₩7,000Entry feeSummer's Done 13.1August 2027 · expected · Cary, NC, United StatesMarathonHalf

Aug expectedRUN ROCKAWAY BEACH NYC END OF SUMMER MARATHON, HALF MARATHON & 5KAug expectedTBDROCKAWAY BEACHUnited States🌤️ 15°₩68,000Entry feeRUN ROCKAWAY BEACH NYC END OF SUMMER MARATHON, HALF MARATHON & 5KAugust 2027 · expected · Rockaway Beach, NY, United StatesMarathonHalf5K

Aug expectedStaunton Rocks! Marathon and Half MarathonAug expectedNot yet openPINEUnited States🧊 3°₩153,000Entry feeStaunton Rocks! Marathon and Half MarathonAugust 2027 · expected · Pine, CO, United StatesMarathonHalf

Aug expectedComlara 12 Hour Sunrise-Sunset, 6 Hour, 3 Hour and Hour of Power Trail RunAug expectedTBDHUDSONUnited States🌤️ 12°₩21,000Entry feeComlara 12 Hour Sunrise-Sunset, 6 Hour, 3 Hour and Hour of Power Trail RunAugust 2027 · expected · Hudson, IL, United StatesHalfUltra

Aug expectedDeath by 5k BrandonAug expectedTBDBRANDONUnited States☀️ 19°₩173,000Entry feeDeath by 5k BrandonAugust 2027 · expected · Brandon, MS, United StatesUltra

Aug expectedFalls & Forest 12‑Hour ChallengeAug expectedTBDRADCLIFFUnited States🌤️ 14°₩83,000Entry feeFalls & Forest 12‑Hour ChallengeAugust 2027 · expected · Radcliff, KY, United StatesUltra

Aug expectedHabanero HundredAug expectedTBDCAT SPRINGUnited States☀️ 21°₩111,000Entry feeHabanero HundredAugust 2027 · expected · Cat Spring, TX, United StatesMarathonHalf10KUltra

Aug expectedLeading Ladies Marathon / Dakota Spirit MarathonAug expectedTBDSPEARFISHUnited States🧊 7°Leading Ladies Marathon / Dakota Spirit MarathonAugust 2027 · expected · Spearfish, SD, United StatesMarathon

Aug expectedNew England Green River MarathonAug expectedTBDGREENFIELDUnited States🌤️ 10°New England Green River MarathonAugust 2027 · expected · Greenfield, MA, United StatesMarathon

D-318Bound for Boston Marathon & Half Marathon - MilwaukeeD-318Not yet openMENOMONEE FALLSUnited States🌤️ 10°₩90,000Entry feeBound for Boston Marathon & Half Marathon - MilwaukeeSun, August 22, 2027 · Menomonee Falls, WI, United StatesMarathonHalf

D-318Wausau Marathon presented by Ho-Chunk Gaming WittenbergD-318OpenWAUSAUUnited States🧊 7°₩76,000Entry feeWausau Marathon presented by Ho-Chunk Gaming WittenbergSun, August 22, 2027 · Wausau, WI, United StatesMarathonHalf5K

D-318Anchorage RunFestD-318Not yet openANCHORAGEUnited States🧊 2°₩49,000Entry feeAnchorage RunFestSun, August 22, 2027 · Anchorage, AK, United StatesMarathonHalf5KUltra

Aug expectedNocterra Quitter's Run presented by BrooksAug expectedTBDPOWELLUnited States🌤️ 12°₩69,000Entry feeNocterra Quitter's Run presented by BrooksAugust 2027 · expected · Powell, OH, United StatesMarathonHalf

Aug expectedMoonlight on the Falls - Marathon, Half Marathon, Quarter Marathon, and Distance ChallengeAug expectedTBDDAVISUnited States🌤️ 11°₩118,000Entry feeMoonlight on the Falls - Marathon, Half Marathon, Quarter Marathon, and Distance ChallengeAugust 2027 · expected · Davis, WV, United StatesMarathonHalf

Aug expectedMidwest States 100Aug expectedTBDWESTBOROUnited States🧊 6°₩257,000Entry feeMidwest States 100August 2027 · expected · Westboro, WI, United StatesUltra

D-324Brookfield ClassicD-324OpenBROOKFIELDUnited States🌤️ 9°₩35,000Entry feeBrookfield ClassicSat, August 28, 2027 · Brookfield, NY, United StatesUltra

Aug expectedRock HawkAug expectedTBDCASTLE ROCKUnited States🌤️ 9°₩76,000Entry feeRock HawkAugust 2027 · expected · Castle Rock, CO, United StatesUltra

Aug expectedBackcountry RiseAug expectedTBDTOUTLEUnited States🌤️ 9°₩173,000Entry feeBackcountry RiseAugust 2027 · expected · Toutle, WA, United StatesUltra

D-324ScoCo50D-324Not yet openLONG GROVEUnited States🌤️ 11°₩42,000Entry feeScoCo50Sat, August 28, 2027 · Long Grove, IA, United StatesUltra

Aug expectedDirty Dozen 50KAug expectedTBDNEW YORKUnited States🌤️ 15°₩153,000Entry feeDirty Dozen 50KAugust 2027 · expected · New York City, NY, United StatesUltra

Aug expectedOcean State UltraAug expectedTBDWEST GREENWICHUnited States🌤️ 13°₩105,000Entry feeOcean State UltraAugust 2027 · expected · West Greenwich, RI, United StatesUltra

Aug expectedCape Blossom MarathonAug expectedTBDKOTZEBUEUnited States🥶 -3°₩35,000Entry feeCape Blossom MarathonAugust 2027 · expected · Kotzebue, AK, United StatesMarathonHalf

Aug expectedYard to YardAug expectedTBDGRAND HAVENUnited States🌤️ 11°₩49,000Entry feeYard to YardAugust 2027 · expected · Grand Haven, MI, United StatesMarathon

D-324Runtastic NEBOD-324OpenPAYSONUnited States🌤️ 10°₩48,000Entry feeRuntastic NEBOSat, August 28, 2027 · Payson, UT, United StatesMarathonHalf10K5K

Aug expectedSalt Springs Field, Forest & Falls Trail RacesAug expectedTBDMONTROSEUnited States🌤️ 10°₩49,000Entry feeSalt Springs Field, Forest & Falls Trail RacesAugust 2027 · expected · Montrose, PA, United States10K5KUltra

Aug expectedEast Canyon Marathon - 26.2 - 13.1 - 10K - 5KAug expectedTBDMORGANUnited States🌤️ 9°₩55,000Entry feeEast Canyon Marathon - 26.2 - 13.1 - 10K - 5KAugust 2027 · expected · Morgan, UT, United StatesMarathonHalf10K5K

Aug expectedFive Fields Farm RacesAug expectedTBDFive Fields Farm RacesAugust 2027 · expected · Bridgton, ME, United StatesUltra

D-329Front Range Ultra DayzeD-329OpenLOVELANDUnited States🌤️ 10°₩160,000Entry feeFront Range Ultra DayzeThu, September 2, 2027 · Loveland, CO, United StatesUltra

Sep expectedDusk to Dawn Relay + UltraSep expectedTBDWENDOVERUnited States🌤️ 11°₩160,000Entry feeDusk to Dawn Relay + UltraSeptember 2027 · expected · Wendover, UT, United StatesUltra

D-331Labor Day TripleD-331OpenWINTER PARKUnited States🔥 23°₩42,000Entry feeLabor Day TripleSat, September 4, 2027 · Winter Park, FL, United StatesMarathonHalf10K5KUltra

Sep expectedNoble Canyon 50K/15KSep expectedTBDPINE VALLEYUnited States☀️ 21°₩104,000Entry feeNoble Canyon 50K/15KSeptember 2027 · expected · Pine Valley, CA, United StatesUltra

D-331Fall - Mud Mountain Dam Marathon & Half MarathonD-331TBDENUMCLAWUnited States🧊 7°₩139,000Entry feeFall - Mud Mountain Dam Marathon & Half MarathonSat, September 4, 2027 · Enumclaw, WA, United StatesMarathonHalf

D-331The Grand TraverseD-331Not yet openCRESTED BUTTEUnited States🧊 1°₩312,000Entry feeThe Grand TraverseSat, September 4, 2027 · Crested Butte, CO, United StatesUltra

Sep expectedCadillac YMCA Festival of RacesSep expectedTBDCADILLACUnited States🌤️ 9°₩35,000Entry feeCadillac YMCA Festival of RacesSeptember 2027 · expected · Cadillac, MI, United StatesMarathonHalf10K5K

D-331Firefly Trail FestivalD-331OpenFORT WAYNEUnited States🌤️ 11°₩14,000Entry feeFirefly Trail FestivalSat, September 4, 2027 · Fort Wayne, IN, United StatesMarathon

Sep expectedSidewinderSep expectedTBDCORAOPOLISUnited States🌤️ 12°₩62,000Entry feeSidewinderSeptember 2027 · expected · Coraopolis, PA, United StatesHalfUltra

Sep expectedCherry Hill Farm UltraSep expectedTBDGORHAMUnited States🌤️ 10°₩118,000Entry feeCherry Hill Farm UltraSeptember 2027 · expected · Gorham, ME, United States10KUltra

D-331Labor Day Trail Challenge 50K • Marathon • Half Marathon • 10K • 5K • 8-Hour Run/Walk (Solo) • 8-Hour RelayD-331OpenCEDAR CREEKUnited States☀️ 20°₩111,000Entry feeLabor Day Trail Challenge 50K • Marathon • Half Marathon • 10K • 5K • 8-Hour Run/Walk (Solo) • 8-Hour RelaySat, September 4, 2027 · Cedar Creek, TX, United StatesMarathonHalf10K5K

Sep expectedHill Country Triple Trail RunSep expectedTBDBURNETUnited States☀️ 20°₩14,000Entry feeHill Country Triple Trail RunSeptember 2027 · expected · Burnet, TX, United StatesMarathonHalf10K5KUltra

Sep expectedNebraska Marathon - Marathon, Half Marathon, 10K & 5KSep expectedTBDPAPILLIONUnited States🌤️ 11°₩55,000Entry feeNebraska Marathon - Marathon, Half Marathon, 10K & 5KSeptember 2027 · expected · Papillion, NE, United StatesMarathonHalf10K5K

Sep expectedSwanzey Covered Bridges Half-Marathon, Elijah's RaceSep expectedTBDSWANZEYUnited States🌤️ 9°₩107,000Entry feeSwanzey Covered Bridges Half-Marathon, Elijah's RaceSeptember 2027 · expected · Swanzey, NH, United StatesMarathonHalf

Sep expectedWilcox WildSep expectedTBDSTONY CREEKUnited States🌤️ 8°₩208,000Entry feeWilcox WildSeptember 2027 · expected · Stony Creek, NY, United StatesUltra

Dates and entry details follow each race's official announcement and may change — re-check on the official page before entering. 10 races on this page are open for entry right now.