| Sistema Huautla | |
|---|---|
 | |
| Location | Sierra Mazateca, Oaxaca, Mexico |
| Coordinates | 18°07′16″N 96°48′00″W / 18.121214°N 96.800008°W |
| Depth | 1,560 metres (5,120 ft) deep. |
| Length | 100,242 metres (62.287 mi) total length. |
Sistema Huautla is a cave system in the Sierra Mazateca mountains of the southern Mexican state of Oaxaca. As of April 2021[update] it is the deepest cave system in the Western Hemisphere, 1,560 metres (5,120 ft) from top to bottom, with over 55 miles of mapped passageways. It is the tenth deepest cave in the world. It is also the 26th longest cave system with over 100 km length.