Largest tributaries
The Klyazma (Russian: Клязьма), a river in the Moscow, Nizhny Novgorod, Ivanovo and Vladimir Oblasts in Russia, forms a left tributary of the Oka.
It is 686 kilometres (426 mi) long.
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 largest tributaries of the Klyazma include (from source to mouth):
Ucha (left)
Vorya (left)
Sherna (left)
Kirzhach (left)
Peksha (left)
Polya (right)
Koloksha (left)
Nerl (left)
Sudogda (right)
Nerekhta (right)
Uvod (left)
Teza (left)
Lukh (left)
Suvoroshch (right)
