The Klyazma River (Russian: Клязьма) is a river in the Moscow, Nizhny Novgorod and Vladimir Oblasts in Russia, a left tributary of the Oka River. The length of the river is 686 km. The area of its drainage basin is 42,500 sq km. The Klyazma River freezes up in November and stays under the ice until mid-April. Its main tributaries are the Ucha, Vorya, Kirzhach, Peksha, Nerl, Uvod, Teza, Lukh, Sudogda, and Suvoroshch. The Klyazma is navigable within 120 km from its estuary and in the area of the Klyazminskoye Reservoir. The cities of Gorokhovets, Mendeleevo, Pavlovsky Posad, Vladimir, Kovrov, Shchyolkovo, Losino-Petrovsky, Noginsk, Orekhovo-Zuyevo, Sobinka, and Vyazniki are located on the shores of the Klyazma River.
