What is often cited as the world's highest navigable lake?

What is often cited as the world's highest navigable lake? Lake Titicaca.

Lake Titicaca lies in the Andes on the border of Peru and Bolivia, at an elevation of about 3,812 metres. It is commonly described as the world's highest navigable lake, particularly when the claim refers to commercial or sizable vessels rather than every small boat.

The wording matters because Titicaca is not the world's highest lake overall. Tiny crater lakes, including one on Ojos del Salado in Chile, sit at much greater elevations. Titicaca is also South America's largest lake by surface area and water volume, and its waters are slightly brackish rather than perfectly fresh.

The lake has long supported Indigenous communities, including the Uros, Aymara and Quechua peoples. It also has a substantial maritime history: vessels have operated there despite its remote, high-altitude setting, and the Peruvian Navy maintains a presence on the lake.