Msta River
Almost the whole area of the district belongs to the drainage basin of the Msta River and thus to the Baltic Sea. The rivers in the northern part of the district drain into the Shlina River and its major tributary, the Granichnaya River. The Shlina originates in Lake Shlino, located on the border between Tver and Novgorod Oblasts, and crosses the northern part of the district. The main river in the southern part of the district is the Tsna, which crosses the area of the district as well. Both the Shlina and the Tsna are left tributaries of the Msta, technically of the Vyshny Volochyok Reservoir. Some areas in the east of the district belong to the Lonnitsa River, a right tributary of the Shlina. Minor areas in the southeast of the district belong to the drainage basin of the Tvertsa River, a tributary of the Volga River.