Mammoth Cave National Park
KY

Mammoth Cave National Park

Hours

Open 24 hours

Entrance Fee

Free

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Mammoth Cave at a glance

Best time
February–May, August–December
Trip length
2–3 days
Don't miss
Cave Tours
Nearby city
Gateway towns in KY

Explore this park

About Mammoth Cave National Park

Rolling hills, deep river valleys, and the world's longest known cave system. Mammoth Cave National Park is home to thousands of years of human history and a rich diversity of plant and animal life, earning it the title of UNESCO World Heritage Site and International Biosphere Region.

3 current NPS alerts

  • Park Closure: Green River Ferry Temporarily Out of Service
  • Park Closure: Elevator for Accessible Tour Out of Service
  • Information: Tickets are required to enter Mammoth Cave

Source: National Park Service (as of Nov 11, 2026). Official Mammoth Cave National Park page on nps.gov

Weather Information

Kentucky has a moderate climate with warm, yet moist conditions.

  • Summer

    average in the high 80s; winters average in the low 40s.

  • Winter

    can bring mild to moderate snow and ice.

Southern Kentucky, where Mammoth Cave is located, receives the highest average precipitation for the state, about 50 inches per year, mostly in spring. Storms happen year-round, and can include tornadoes and flooding in low-lying areas, but severe weather is infrequent. The temperature deep in the cave is a constant 54°F (12°C).

Operating Hours

Park Hours

Mammoth Cave National Park is open 24-hours a day, although services such as cave tours and the visitor center are limited after-hours. There is no gate at the park entrance. Please note that camping is only possible either in designated campgrounds or backcountry campsites with a valid reservation or permit.

  • MondayAll Day
  • TuesdayAll Day
  • WednesdayAll Day
  • ThursdayAll Day
  • FridayAll Day
  • SaturdayAll Day
  • SundayAll Day

Common questions

Planning Mammoth Cave

The summary above covers timing and highlights. These go deeper on reservations, crowds, and logistics — check Alerts and Permits for live updates.

TrailVerse lists 20 reservation types on the Permits tab, including Mammoth Cave National Park Tours and Accessible Tour. Recreation.gov listings can change seasonally — confirm current rules before you set dates.