With an area of 370 km2, 52 km long and 17 km wide, Lake Garda is the largest of the Italian lakes.
The height is 65 meters above sea level and its maximum depth is about 365 meters.
From March to October, boats, ferries and hydrofoils will bring you from Salò to all the other towns around Lake Garda.
Information, tarif and timetable:
http://www.navigazionelaghi.it/ita/gar/nlg.html