Pra River (Russia)
Pra River (Russian: Пра) is a river in the Ryazan and Moscow Oblasts in Russia, a left tributary of the Oka River. It is 167 kilometres (104 mi) in length. The area of its basin is 5,520 square kilometres (2,130 sq mi). The Pra River freezes up in late November and stays under the ice until April.
Coordinates: 54°44′52″N 41°00′34″E / 54.74778°N 41.00944°E
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