Lake Idro (Italian:Lago d'Idro, also Eridio from the Latin Eridius lacus) is an Italian prealpine lake of glacial origin situated largely within the Province of Brescia (Lombardy) and in part in the Province of Trento (Trentino-Alto Adige/Südtirol).At 368 meters above sea level it is the highest of the Lombard prealpine lakes. The lake is fed principally by the waters of the river Chiese; that river is also its only emissary. It has has a surface area of 11.4 km² and a maximum depth of 122 meters. The lake is surrounded by wooded mountains. The shoreline of some 24 km is shared between four communes: Idro (the frazioni Crone and Belprato), from which the lake takes its name, Anfo, Bagolino (fraz. Ponte Caffaro) and Bondone (fraz. Baitoni).
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