Lake Topozero is a large freshwater lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 in the Republic of Karelia

Republic of Karelia

The Republic of Karelia is a federal subject of Russia .-Geography:The republic is located in the northwestern part of Russia, taking intervening position between the basins of White and Baltic seas...

, northwestern part of Russia

Russia

Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

. It is located at around 65.66°N 32°E and has an area of 986 km², it's 75.3 km long and 30.3 km wide. Maximum depth is about 50 m. There are more than 100 islands on the lake. Topozero is used for fishery

Fishery

Generally, a fishery is an entity engaged in raising or harvesting fish which is determined by some authority to be a fishery. According to the FAO, a fishery is typically defined in terms of the "people involved, species or type of fish, area of water or seabed, method of fishing, class of boats,...

 and timber floating

Timber floating

Timber floating may refer to:*Log driving*Timber rafting...

. From Lake Topozero the waters flow north into the Lake Pyaozero

Lake Pyaozero

Lake Pyaozero is a large freshwater lake in the Republic of Karelia, northwestern part of Russia. It is located at and has an area of 659 km². There are many islands on the lake with total area of 186 km²...

 and from there to the White Sea

White Sea

The White Sea is a southern inlet of the Barents Sea located on the northwest coast of Russia. It is surrounded by Karelia to the west, the Kola Peninsula to the north, and the Kanin Peninsula to the northeast. The whole of the White Sea is under Russian sovereignty and considered to be part of...

 through the Kovda River

Kovda River

Kovda River is a river in the south of the Kola Peninsula in Murmansk Oblast and Republic of Karelia, Russia. It is 233 km in length. The area of its basin is 26,100 km². The Kovda River originates in the Lake Topozero and flows through the lakes Lake Pyaozero and Lake Kovdozero into the...

.