The Klyazma (Russian: Клязьма, IPA: [ˈklʲæzʲmə], Klyaz'ma or Kliazma), a river in the Moscow, Nizhny Novgorod, Ivanovo and Vladimir Oblasts in Russia, forms a left tributary of the Oka.

[1] The Klyazma usually freezes up in November and stays under the ice until mid-April, although in faster-moving stretches ice-free water occurs until the air temperature drops below −10 °C (14 °F).

The cities of Gorokhovets, Mendeleyevo, Pavlovsky Posad, Vladimir, Kovrov, Shchyolkovo, Losino-Petrovsky, Noginsk, Orekhovo-Zuyevo, Sobinka and Vyazniki stand on the shores of the Klyazma River.

The basin of the Klyazma formed the center of the Vladimir-Suzdal principality in the 12th to 14th centuries CE.

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