Mammoth Cave National Park guide · 1 min read
420 Miles and Counting: Mapping the Longest Cave
Beneath Mammoth Cave National Park lies the largest cave system on Earth, and no other known cave is even half its length.
Survey teams have charted more than 420 miles of its winding passages. Explorers have been making their way through it off and on for roughly 4,000 years, but nobody knows how far it truly runs.
Geologists believe roughly 600 further miles of passages could still lie undiscovered. The system also reaches toward its neighbors. The Fisher Ridge Cave System and the Martin Ridge Cave System lie a short distance away, and Proctor/Morrison Cave, beneath nearby Joppa Ridge, was connected to the Mammoth system in 1979. Roppel Cave, east of the park, was linked to that section in 1983 when two groups started from different entrances and met somewhere in the middle.
Exploration has a long record. In 1954, the C-3 expedition, organized by the National Speleological Society, confirmed that passages in Collins Crystal Cave reached in the direction of Mammoth. Stephen Bishop, the cave's most famous guide and explorer, is among the best-known names tied to its history. Seeing the cave means joining a guided tour, and there are many to choose from.
The cave is home to about 130 forms of life, most of them very small. Some species are so specialized to underground life that they cannot survive anywhere else, and every one of them ultimately relies on energy that originates at the surface. Bats share the cave too, but White-Nose Syndrome has sharply cut their numbers. Head to the Mammoth Cave Visitor Center for booking tours, browsing exhibits and planning your trip.
