Lago Maggiore (anc. Lacus Verbanus), a lake of N. Italy and Switzerland, enclosed by Lombardy, Piedmont, and the canton of Ticino; length 40 m.; average breadth 2 m., greatest breadth 5 m.; greatest depth 2,625 ft.; elevation of surface above the sea, about 683 ft. The principal affluents are the Ticino, flowing from the St. Gothard range, the Toce or Toccia, entering on the west, and the Tresa, which drains the lake of Lugano; its great outlet is the Ticino, which issues from its S. extremity at the town of Sesto. Near the entrance of the gulf of Tosa, on the W. side, lie the Borromean islands, remarkable for their picturesque beauty. The Swiss portion of this lake is termed lake of Locarno. The surrounding mountains are covered with forests, the timber of which gives rise to a considerable traffic, and employs numerous vessels. Steamers ply regularly between Magadino, near the N. extremity, and Sesto. The lake abounds in fish, particularly trout. There are valuable quarries of fine white marble on its shores.