VYSHNIY-VOLOCHOK, a town of Russia, in the government of Tver, 74 m. by rail N.W. of the city of Tver. Pop. 16,722. The place owes its importance to its situation in the centre of the Vyshne-Volotsk navigation system (540 m. long, constructed by Peter the Great in 1703–9), which connects the upper Volga with the Neva. The portage (volok) is less than 17 m. between the Tvertsa, a tributary of the Volga, and the Tsna, which flows into the Msta and the Volkhov (Lake Ladoga); but boats now prefer the Mariinsk system.