[3] About 1800 CE, a lava flow from one of the volcanic cones reached the southern shore of the lake causing a rocky, distorted delta.

[6] Lake Huechulafquen is a popular tourist destination for camping, hiking, boating, climbing Lanin volcano, and fishing for rainbow and brown trout, species introduced to Argentine in the early 1900s.

A road runs along the north shore of the lake, passing through several communities of the Mapuche people, who live within the boundaries of Lanin National Park.

[7] Another road touches along the southern shoreline of Lake Epulaufquén providing access to the volcanic flows there.

[8] This road continues westward, crossing into Chile at the Carirriñe Pass, elevation 1,223 metres (4,012 ft).