Neltume Lake, Glacial lake in Panguipulli, Chile

Neltume Lake is a glacial lake in the Panguipulli municipality of Chile's Los Ríos Region, one of the Seven Lakes group. It lies at 325 m altitude between steep-sided hills east of Panguipulli Lake. The Cua-Cua and Chanchán rivers feed it, and its only outlet, the short Neltume River, soon joins the Fuy to form the Llanquihue.

The lake was formed through glacial processes during the last ice age, carving deep basins into the Andean landscape. This formation thousands of years ago continues to shape the appearance of the entire region today.

The lake is part of the Seven Lakes circuit in southern Chile, where Mapuche communities continue their long relationship with these waters. Local people value the area for its connections to indigenous traditions and daily life in the Andes.

The lake is accessible via the Lakes and Volcanoes Route with multiple entry points leading to mountain trails and fishing areas nearby. Visitors should know the area is open year-round, but the best hiking season is the warmer months from December to March.

Luis Risopatrón's 1924 Diccionario Jeográfico de Chile records the lake as about 7 km long at 325 m altitude, between steep-sided hills east of Panguipulli Lake. Its name comes from Mapudungun montulvn we, "released place". A 2018 water authority report rated it ultraoligotrophic to oligotrophic, with some high total phosphorus values.