World's Longest Cave System
Established in 1941, Mammoth Cave National Park protects 52,830 acres of Kentucky wilderness, including the world's longest known cave system. With over 400 miles of surveyed passageways, the cave continues to yield new discoveries.
Beyond its remarkable underground world, the park preserves diverse surface ecosystems and thousands of years of human history. From ancient Native American artifacts to early cave exploration, Mammoth Cave tells stories of human interaction spanning millennia.
Kentucky
1941
52,830 acres
~600,000
400+ miles
Year-round
Classic cave route.
Spectacular formations.
Scenic waterway.
Unique karst window.
Historic signatures.
Underground waterway.
Cave stays 54°F year-round. Surface varies. Check conditions.
Lodge and campgrounds available. View options.
Reservations strongly recommended. Various options.
Personal vehicle recommended. Limited shuttle service.
Several accessible tours and facilities. View the accessibility guide.
Located in central Kentucky. 90 miles from Louisville.
The park is open 24/7 year-round. Cave tours operate daily except December 25. Summer is busiest.
Visitor Center provides orientation and exhibits. Cave tours range from easy to challenging.
Entrance fees required for cave tours. Surface areas free. Advance tour reservations recommended.