Lake Kovzhskoye Lake Kovzhskoye Lake Kovzhskoye () is a freshwater lake, located in the center of Vytegorsky District of Vologda Oblast in Russia. It is one of the biggest lakes in Vologda Oblast and the second biggest one in Vytegorsky District behind Lake Onega. The area of the lake is , and the area of its basin is . The main tributary of the lake is the Iles River. Lake Kovzhskoye is the source of Kovzha River, one of the principal tributaries of Lake Beloye. The lake belongs to the basins of the Volga and the Caspian Sea. The lake has a
Lake Onega is relatively cold, with temperatures below for half of the year and average summer temperatures of about . The catchment area of drains into the lake via 58 rivers and more than 110 tributaries, including the Shuya, Suna, Vodla, Vytegra and Andoma. The only outgoing River Svir, which marks the southern boundary of Karelia, runs from the southwestern shore of Lake Onega to Lake Ladoga and continues as the Neva River to the Gulf of Finland. The White Sea–Baltic Canal runs through the lake from the White Sea to the Baltic Sea. The Volga–Baltic Waterway connects Onega Lake with the