The longest river in Europe is the Volga, in Russia. It is 3,645 kilometres long and is the 15th longest river in the world. It is also Europe’s largest river in terms of discharge, with 8,060 cubic metres per second.
Its source is in the Valdai Hills, 228 metres above sea level, and it flows through ten Russian oblasts (Tver, Yaroslavl, Kostroma, Ivanovo, Nizhny Novgorod, Ulyanovsk, Samara, Saratov, Volgograd and Astrakhan) and three republics (Mari El, Chuvashia and Tatarstan).
It flows into the Caspian Sea, and almost its entire course is navigable. The Volga’s main tributaries are the Kama and the Oka rivers, and it has a total of about 200 tributaries.
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