The Sumka (Russian: Сумка) is a river in Zelenodolsky District of the Republic of Tatarstan, Russia, a left-bank tributary of the Volga River. It is 37 kilometres (23 mi) long, and its drainage basin covers 250 square kilometres (97 sq mi). It begins near Gremyachy Klyuch and flows to the Kuybyshev Reservoir, Volga, forming the western border of Vasilyevo, Tatarstan.The river valley comes through the Raifa section of the Volga-Kama Reserve.
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