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Sullivan Cave

Wild caveIntermediateMixed wet/dry

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DifficultyIntermediate
Length9.6 mi
EnvironmentMixed wet/dry
Temperature52°F

One of Indiana's great wild caves - the 4th-longest in the state at about 9.63 miles of mapped passage. A large walking trunk passage gives way to tougher going, including the low-ceilinged 'Backbreaker' and the enormous 'Colossus' room (about 120 ft tall and 200 ft long).

Type
Wild cave
Orientation
Horizontal
Passage
Moderate
County
Lawrence County

Entrance

Begins with roomy, walkable trunk passage, but deeper routes include long low crawls like the 'Backbreaker'. No vertical gear required for the main routes.

Hazards

  • Long trip distances - easy to underestimate time and energy
  • Low crawls ('Backbreaker') and route-finding in a large system
  • No lighting, markings, or services

Gear

Helmet and headlamp with multiple backups, knee pads, synthetics, and plenty of food and water for a long day underground.

Geology

A very long limestone cave with a large trunk passage and the huge 'Colossus' chamber; a classic Lawrence County karst system.

Access

Owned by the Indiana Karst Conservancy. Requires a signed IKC waiver and arranging access through the cave patron for permission and gate keys - request about two weeks in advance.

  • OwnershipPrivate
  • Permit requiredNo
  • Permission requiredYes

Conservation

Protected as the Indiana Karst Conservancy's first nature preserve (acquired 1998), managed under a current plan. With heavy traffic potential, low-impact caving matters — stay on established routes, pack everything out, and decontaminate gear (white-nose syndrome).

More caves in Lawrence County

Caving responsibly

Most wild caves are reached through the local caving community, not by showing up — joining a grotto gets you training, gear advice, a conservation ethic, and, in time, cave locations.

Current conditions

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Trails (0)

A trail records the way through a cave — walk it once and anyone can follow it back in or out. Near the entrance with GPS it replays in AR; deep underground it's a compass guide (no signal needed).

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