Mammoth Cave National Park
The longest known cave system in the world, with more than 680 kilometers of passages mapped.
Photo: Willis Thomas Lee · Public domain
Mammoth Cave guide: ranger-led cave tours and tickets, the Historic and Domes and Dripstones tours, Frozen Niagara, the Green River, hiking and how to book.
What to expect
Beneath the wooded hills of central Kentucky lies the longest known cave system on Earth: more than 426 miles of passages have been mapped, and explorers keep finding new ones. The park is a UNESCO World Heritage Site and an international biosphere reserve.
The cave can only be visited on ranger-led tours, from easy walks to tight crawls. The Historic Tour follows passages explored since the early 1800s, including saltpeter mining works used to make gunpowder during the War of 1812, while the Domes and Dripstones Tour descends a long staircase to sparkling formations such as Frozen Niagara.
Entry to the park itself is free, but tour tickets sell out in summer and on holidays, so book online in advance. Above ground, hiking trails wind through the forest and the Green River offers canoe and kayak trips.
The park is about an hour and a half by car from both Nashville and Louisville, which makes it an easy stop on a road trip between the two cities.
Mammoth Cave: top things to do
- 1The Historic Tour
- 2Frozen Niagara on the Domes and Dripstones Tour
- 3Paddling the Green River
- 4Forest trails above the cave
Mammoth Cave: best time to visit
All year; the cave stays at about 12°C (54°F).
Mammoth Cave: insider tips
- Book cave tours early, especially for summer weekends.
- Wear sturdy shoes; most tours include hundreds of steps.
- Walk across the cleaning mats after a tour; they protect the bats from white-nose syndrome.
Fees, passes and parking
| What | Price |
|---|---|
| Entrance | Free |
| Historic Tour, adult | $24 per person |
| Domes and Dripstones Tour, adult | $30 per person |
- Federal park passes such as America the Beautiful are not valid here.
- Entry to the park is free; the cave is visited on paid ranger-led tours, with discounts for youth and half price with a Senior or Access Pass.
Checked Oct 28, 2026. Official prices
Gas and fast charging nearby
19 gas stations within 20 km
- 11.0 km Park City Shell Shell
- 12.5 km BP
- 12.5 km Shell
- 13.3 km Gas station
- 13.4 km Gas station
- 13.7 km Marathon
- 14.7 km ChargePoint Fast chargers (ChargePoint)
- 19.0 km Tesla Supercharger Fast chargers (Supercharger)
OpenStreetMap data, Oct 28, 2026.
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