Lake Onega
The northwestern border of the district is the shore of Lake Onega, and the area of the district is divided between several drainage basins. The western and the central parts belong to the basins of the rivers flowing into Lake Onega, most notably the Vytegra, the Vodla, the Andoma, and the Megra. Lake Onega belongs to the basin of the Neva River. From the east, the Andoma Hills separate the basin of Lake Onega from the basins of the Kovzha and the Kema Rivers, which are the tributaries of Lake Beloye and thus belong to the basin of the Volga. Minor areas in the northeast of the district are in the basin of Lake Lacha, itself in the basin of the Onega River. In the northeast of the district there is a point which is a triple divide of the basins of the Neva, the Volga, and the Onega, and thus the basins of the Atlantic Ocean, the Arctic Ocean, and the endorheic basins of the interior of Eurasia. This is one of the very few such triple divides in the world and the only one in Russia.