Jewel Cave National Monument
Over 220 miles of mapped cave passage
Jewel Cave is one of the longest caves in the world, with over 220 miles of mapped passages. Nailhead spar, a calcite formation, coats most of its walls, ceilings and floors. All cave access is by guided tour, so reserve early through recreation.gov or arrive early for same-day tickets. Drive time and distance are routing estimates from OSRM; allow extra for season, traffic and road work.
Highlights
- Guided cave tours: Routes include the Scenic Tour, Historic Lantern Tour and Wild Caving Tour.
Stops along the way
- Crazy Horse Memorial: On US 385 on the way south.
- Jewel Cave Visitor Center: Off US 16 west of Custer.