The following is a list of the longest caves in the United States per length (over ) of documented passageways. Many passageways are still being discovered; this list is based on the latest verifiable data. Some caves and cave systems are partially accessible to the general public. Other caves have restricted access; restrictions may include limiting access to experienced spelunkers or scientific research teams.
#SystemLengthLocationCoordinatesAssociated parks,protected areasAccess 1Mammoth Cavenear Brownsville, Kentucky Mammoth Cave National Park, also a World Heritage Site and International Biosphere Reserve. Longest cave in the world.Some public access 2Jewel Cavenear Custer, South DakotaJewel Cave National MonumentSome public access 3Wind Cavenear Hot Springs, South DakotaWind Cave National ParkSome public access 4Lechuguilla Cavenear Carlsbad, New MexicoCarlsbad Caverns National ParkRestricted access, requires authorization 5Fisher Ridge Cave Systemnear Brownsville, Kentuckypartly within Mammoth Cave National Park 6 Helms Deep CavePerry County, TennesseeNone.Entrances are on private property.Restricted access, requires authorization 7 Great Savannah Cave System,(Maxwelton Sink Cave-McClung Cave) near Greenbrier County, West VirginiaNone. Entrances are on private property.Restricted access, requires authorization 8Fort Stanton Cavenear Lincoln County, New Mexico Fort Stanton–Snowy River Cave National Conservation AreaRestricted access, requires authorization. 9Friars Hole Cave Systemnear Renicks Valley, West VirginiaNone. Multiple entrances, most on private property. Some entrances closed. Some entrances require authorization. Some entrances accessible. 10Binkley's Cave Systemnear Corydon, IndianaNone. Entrance on private property.Some public access 11Wakulla-Leon Sinks Cave SystemWakulla County, FloridaNone. Underwater cave system. 12Whigpistle SystemEdmonson County, Kentuckynone 13HellholeGermany Valley, West VirginiaNone. Entrance is privately leased and owned. Home of two federally protected bat species.No public access at any time. Restricted scientific access. 14Double Bopper Cave .Coconino County, ArizonaGrand Canyon National ParkRestricted access, requires authorization 15Blue Spring Cavenear Sparta, TennesseenoneRestricted access, requires authorization 16Kazumura CavePahoa, HawaiiNone. Entrance on private property.Some public access for fee. 17Carlsbad Cavernsnear Carlsbad, New MexicoCarlsbad Caverns National ParkPublic access. 18Organ CaveGreenbrier County, West VirginiaNone. Entrances on private property.Some entrances closed. Some entrances require authorization. Some entrances accessible. 19Crevice CavePerry County, Missouri none
See also List of caves List of longest caves List of deepest caves
References
External links USA Long caves by state: