Budi Lake is a tidal brackish water lake located near the coast of Araucanía Region

Araucanía Region

The IX Araucanía Region is one of Chile's 15 first order administrative divisions and comprises two provinces: Malleco in the north and Cautín in the south....

, southern Chile

Southern Chile

Southern Chile may refer to different areas of Chile depending on the context. It may refer to:*Any place south of Santiago*All the region south of Biobío River*The Zona Sur region between Biobío and Chacao Channel....

. The lake is part of the boundaries between Saavedra and Teodoro Schmidt

Teodoro Schmidt, Chile

Teodoro Schmidt is a Chilean town and commune located in Cautín Province, Araucanía Region. Teodoro Schmidt spans a coastal area of .-Demographics:...

 commune.

Budi Lake is among the few lakes of the west coast of the Americas that have seasonal inflows of sea water. Another difference to many Chilean lakes is that Budi Lake is not of glacial origin and does not lies in the Andes

Andes

The Andes is the world's longest continental mountain range. It is a continual range of highlands along the western coast of South America. This range is about long, about to wide , and of an average height of about .Along its length, the Andes is split into several ranges, which are separated...

 mountains. Budi Lake is above a coastal plain just south of Nahuelbuta Range and north of the Valdivian Coastal Range

Valdivian Coastal Range

The Valdivian Coastal Range is a mountain range in southern Chile, along the Pacific coast. Named for the city of Valdivia, it covers about 1 million acres of the Valdivian temperate rain forests, approximately one-quarter of which are protected. It forms part of the larger Chilean Coast Range...

 where the Chilean Coast Range

Chilean Coast Range

The Chilean Coastal Range is a mountain range that runs from north to south along the Pacific coast of South America parallel to the Andean Mountains, extending from Morro de Arica in the north to Taitao Peninsula, where it ends at the Chile Triple Junction, in the south. The range has a strong...

 is heavily eroded.

According to the census of 2002, the zone around the lake is one the poorest parts of Araucanía Region, Chile's poorest region in turn. The 13,275 persons who live around the lake form 3,087 families with 30 years as average age. 40% of the population is under 18 years old and 73.2% declare to be Mapuche

Mapuche

The Mapuche are a group of indigenous inhabitants of south-central Chile and southwestern Argentina. They constitute a wide-ranging ethnicity composed of various groups who shared a common social, religious and economic structure, as well as a common linguistic heritage. Their influence extended...

s.