Onega River 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 of the river is
Arkhangelsk Oblast and the selo of Leshukonskoye, and there are still no roads into the Nenets Autonomous Okrug, on the left bank of the Onega downstream from Severoonezhsk, and very few roads on the right bank of the Northern Dvina. Many rivers can only be crossed by ferry boats, which means they cannot be crossed during the ice melting period. There is regular bus service on the main roads. The principal railway line in the oblast is the railroad connecting Moscow and Arkhangelsk. The piece between Vologda and Arkhangelsk was constructed in 1890s and passed through previously uninhabited areas between the valleys