Field file 27 · Underground · Kentucky
Mammoth Cave
Mammoth Cave, Kentucky · South-Central Kentucky · Cave system
Record
Why it matters
The world's longest known cave system, with human history, enormous passages, and routes ranging from accessible to demanding.
Field note
Choose a National Park Service tour that matches your mobility and tolerance for stairs, darkness, and tight spaces.
Evidence line
This file is marked Documented because the place and its history are supported by the linked authoritative source. Practical details were last checked in July 2026. Conditions change. Check the primary source before leaving home.
Access
How to approach it lawfully
Tours vary sharply in difficulty. Reserve early and read route details.
- Access status
- Guided only. Entry is only through an authorized guided tour. Recorded as: Ranger-led cave tours.
- Reservation
- Reserve tours early.
- Seasonality
- No seasonal limit recorded. Hours still change; check before traveling.
Practical details last checked July 2026. Conditions change. Check the primary source before leaving home.
Plan the stop
What to plan for
- Time
- 2 hours to full day
- Cost
- Tour ticket required (Ticketed)
- Terrain
- Not recorded in this file. Check the official source.
- Mobility
- Tours vary sharply in stairs, darkness, and tight spaces.
- Parking
- Not recorded in this file. Check the official source.
- Weather
- Not recorded in this file. Check the official source.
Directions to the public entrance Opens Google Maps with these coordinates. The provider sees them under its own privacy policy. Confirm the entrance against the official source first.
Record
Sources
- Primary sourceNational Park Service , opens in a new tab
Sources are summarized in the Atlas's own words and checked on the dates shown. See the methodology, or send a correction.
Road file
Carry it forward
Saved stops stay in this browser. No account. Export from the road file page when you want a copy.
Book the tour, not the trouble.
No partner link on this file. Use the official source for tickets and tours. How partner links work.