Onega River traversed by ferry crossings. Onega River The Onega (; ) is a river in Kargopolsky, Plesetsky, and Onezhsky Districts of Arkhangelsk Oblast in Russia. The Onega connects Lake Lacha with the Onega Bay in the White Sea southwest of Arkhangelsk, flowing in the northern direction. The discharge at the source is and at the mouth is . The river is long, and the area of its basin . Its main tributaries are the Voloshka (right), the Kena (left), the Mosha (right), the Kodina (right), and the Kozha (left). The major tributary of the Lake Lacha is the Svid. The name
Lake Onega Volga River, Caspian Sea and Black Sea. The Onega Canal, which follows the southern banks of the lake, was built in 1818–1820 and 1845–1852 between Vytegra River in the east and Svir River in the west. The canal was part of the Mariinsk Canal System, a forerunner of the Volga–Baltic Waterway, and aimed to create a quiet pass for boats avoiding the stormy waters of the lake. It is around wide, and lies between and from the shores of the lake. The canal is not used for active navigation at present. There are about 1650 islands in the lake with