Sistema Huautla is a cave system in the Sierra Mazateca mountains in the Teotitlán District of the Cañada region in the southern Mexico state of Oaxaca.

Over time the Sótano de San Agustin was found to be connected to La Grieta and Nita Nanta, and eight more cave entrances were discovered.

In an expedition in 1977, the deepest point of the cave system was discovered after staging multiple underground camps, a flooded tunnel at 1325 meters, known as the San Agustín sump.

They explored three parts of the sump system and discovered an upstream tunnel leading to the only known exit for the water that enters the Huautla caves, the spring of Peña Colorada.

In 2018, an international team of 24 cavers could not find a connection of the nearby Cueva de La Peña Colorada Sump VII with Sistema Huautla during their two-month long expedition.