From the Wikipedia page 
Vyshnevolotsky District (Russian: Вышневоло́цкий райо́н) is an administrative and municipal district (raion), one of the thirty-six in Tver Oblast, Russia. It is located in the north of the oblast and borders with Udomelsky District in the north, Maksatikhinsky District in the northeast, Spirovsky District in the east, Torzhoksky District in the south, Kuvshinovsky District in the southwest, Firovsky District in the west, and with Bologovsky District in the northwest. The area of the district is 3,400 square kilometers (1,300 sq mi). Its administrative center is the town of Vyshny Volochyok (which is not administratively a part of the district).