Lake Los Cántaros is a lake of Andean glacial origin located in Argentina, southwest of the province of Neuquén.

It is located less than one kilometre north of the western end of the Blest arm of Nahuel Huapi Lake. It has a length of 650 metres and is located entirely within the Nahuel Huapi National Park. It is surrounded by a lush Valdivian forest, characterised by a great variety of plant species. Located very close to the border with Chile, it is in an area of high rainfall. Its southern shore is the source of its outfall, the Los Cántaros River, which flows into the Nahuel Huapi Lake, near the western end of the Blest arm. In less than a kilometre, the Río de Los Cántaros falls more than 100 metres; part of this important descent is made through a waterfall.