Curated races, clubs, and training

MarathonThe full 26.2 Half Marathon13.1 miles of fun 5KShort and fast 10KThe classic distance TrailGet off the pavement RoadPavement classics Ultra50K, 100K, and beyond FlatFast, PR-friendly courses DownhillNet elevation drop RelayRun as a team VirtualRun anywhere, anytime CoastalRun along the shoreline MountainHigh-altitude challenges

5KShort and fast 10KThe classic distance Half Marathon13.1 miles of fun MarathonThe full 26.2 50KYour first ultra 50 MileThe long haul 100KUltimate endurance 100 MileThe ultimate challenge

All trail racesGet off the pavement Mountain TrailsAlpine singletrack Coastal TrailsOcean views on foot Hilly TrailsRolling terrain off-road Flat TrailsSmooth and fast off-road Trail Ultras50K+ off-road Trail 50KFirst ultra on dirt Trail Marathon26.2 off-road Trail Half13.1 off-road

All road racesPavement classics Road MarathonClassic 26.2 on pavement Road Half13.1 on the roads Road 10K6.2 miles on pavement Road 5KFast 3.1 on the roads Flat RoadPR-friendly road courses Downhill RoadNet downhill road courses City RoadUrban road events

United StatesRaces across America Boston, MAHistoric running city New York, NYThe five boroughs Chicago, ILFlat and fast Los Angeles, CAWest coast running San Francisco, CAHills and views Denver, COMile high racing Portland, ORPacific Northwest Seattle, WAEmerald city runs Austin, TXTexas running scene Nashville, TNMusic city miles San Diego, CAYear-round sunshine Miami, FLTropical running Honolulu, HIIsland paradise runs Washington, DCMonument runs Salt Lake City, UTMountain valley racing Boulder, CORunner's paradise Bend, ORTrail town USA Asheville, NCBlue Ridge running Duluth, MNNorth Shore trails Charleston, SCSouthern charm runs Savannah, GALive oak lined routes Santa Fe, NMHigh desert art town Key West, FLSouthernmost runs Maui, HIVolcanic island trails Napa Valley, CAWine country running

FlatFast, PR-friendly courses RollingGentle hills throughout HillySignificant climbs MountainousMajor elevation challenges DownhillNet elevation drop CoastalRun along the shoreline MountainHigh-altitude challenges ValleyBetween the peaks IslandSurrounded by water CanyonDeep and dramatic DesertArid and exposed

OceanRun along the ocean LakePeaceful lake views RiverFollow the water BayHarbor and bay views WildernessDeep backcountry RuralQuiet country roads CityUrban energy LoopStart and finish together Point to PointA to B adventures Out & BackThere and back again

Turkey TrotThanksgiving weekend runs New Year'sStart the year running July 4thIndependence Day runs Valentine'sRun with your sweetheart St. Patrick'sLucky runs in green HalloweenSpooky season runs Memorial DayHonor and run ChristmasHoliday season runs Labor DayEnd-of-summer runs Mother's DayRun for mom Father's DayRun for dad Cinco de MayoFiesta runs MLK DayDream runs

YosemiteSierra Nevada running Grand CanyonRim-to-rim adventures ZionRed canyon trails YellowstoneGeothermal wilderness Big SurCoastal California SedonaRed rock running MoabDesert ultra country Lake TahoeAlpine lake running AcadiaNortheast coastal trails GlacierCrown of the continent Death ValleyExtreme desert running Joshua TreeHigh desert trails Rocky MountainAlpine trail running OlympicRainforest to coast Bryce CanyonHoodoo trails Great Smoky MountainsAppalachian running LeadvilleRace across the sky Mount RainierVolcanic peak trails Pictured RocksGreat Lakes shoreline

RelayRun as a team VirtualRun anywhere, anytime WalkingWalk-friendly events TrackOn the oval GrassSoft underfoot SandBeach running MixedVariety of terrain LapsMultiple loops

About Pricing Brand Terms Privacy

© 2026 Intervals

Races Clubs Train Wrapped

2026 Outdoor X12 Endurance Run & Ruck — Dayton, OH

Races
United States
Ohio
2026 Outdoor X12 Endurance Run & Ruck

2026 Outdoor X12 Endurance Run & Ruck

Saturday, October 3, 2026Dayton, OHUltra

Registration open18 weeks

THE RACE The Outdoor Experience 12 Hour Race (affectionately known as the OX12) is produced in collaboration with Five Rivers Metroparks and the Subaru Outdoor Experience. 2.7+ mile loop course and flat! Finisher Medals for those that travel upon the course for the full 12 hours. THE COURSE 4% bike path, 96% grass/trail double track. ADDITIONAL COURSE INFORMATION Course Map Course Video Official Outdoor Experience Website

Race

Surface

Road

Oct 37:00 AM

120 spotsShirt

$60

$65 after Aug 29

Oct 37:00 AM

120 spotsShirt

$60

$65 after Aug 29

Not affiliated with this event. Official website. We may earn a commission on registrations.

Location

1385 Harshman Road

Dayton, OH 45431

More races near Dayton

Live Free Fun Run and Festival

Nation's First 5K

Girls on the Run 5K Somerville Presented by The Waldele Family Foundation

Stripes & Schmear

Get the Slack Out 5k & 8k

Cape May Courthouse, NJ

South Orange Rescue Squad - "Sound The Siren" 5K Run / Walk & EMS Open House

South Orange, NJ

3.1 MilesKids Fun Run (free!)South Orange Rescue Squad EMS Community Open House

Good Grief's 5K Run & Walk - Morristown Area

Infinite Love Tutu Trot 5K Run/Walk

Hometown Half Marathon & 5k/10k - Fayetteville

Kid's Dash1 Miles3.1 Miles+4

Lighthouse Fun Run & Family Day

Santa Margarita, CA

3.1 Miles880 Yards100 Yards

The Great White Chase – 5K, 10K, 10M, and Half Marathon

Fire Hydrant 5K & Dog Expo

Huntington Beach, CA

5K1 MilesDog Expo