The lake is at an elevation of 655 metres (2,149 ft), and its surface area is 2.187 km2 (0.844 sq mi).

Lake Ledro originates from the deposition of a morainal bank during the fourth glacial era.

[citation needed] There are also tributaries (Massangla[2] (at the West end of the lake, joined by the Torrente Assat of Pieve), Assat of Pur (from the South, at the East end of the lake), and Rio di Val Molini (at the Northern corner at the West end of the lake)), although these are dry for most of the year.

The area was discovered in 1929 when the level of the lake was lowered to supply the hydroelectric plant being built at Riva del Garda.

[3] The archaeological site still shows many features and traditions of the Neolithic period, but also impulses of the Early Bronze Age.