Lake Orta (Lago d´Orta)
Lake Orta covering a surface of 18.2 sq. km lies in the Piedmont (North of Italy), west of Lago Maggiore, at an altitude of 290 m. The lake has a length of 13.4 km and a width of 2.5 km. Its maximum depth is 143 m. Isola San Giulio is the only island in Lake Orta.
Lake Orta was formed by melting glaciers like other pre-alpine lakes. The Western shore is steep, here begin the foothills of the Monte-Rosa massif, which with 4,633 m is the second highest peak of the Alps. The Eastern shore gradually rises to the Mottarone mountain (1,491 m), forming the border to Lago Maggiore.