Lake Todos los Santos (Spanish for "All Saints Lake") is a lake located in the Los Lagos Region of southern Chile, 96 km northeast of the regional capital Puerto Montt and 76 km east of Puerto Varas, within the boundaries of the Vicente Pérez Rosales National Park. It has a surface area of 178.5 km² and a maximum depth of 337 m. The Lake's National Park status has ensured protection to its environment. The catchment is largely covered with old-growth Valdivian temperate rain forests.