"The Ket River (Russian: \u041A\u0435\u0442\u044C), also known in its upper reaches as the Big Ket River (Russian: \u0411\u043E\u043B\u044C\u0448\u0430\u044F \u041A\u0435\u0442\u044C) is a west-flowing river in the Krasnoyarsk Krai and Tomsk Oblast in Russia, a right tributary of the Ob River. The Ket River has a length of 1,621 kilometres (1,007 mi) and a drainage basin of 94,200 square kilometres (36,400 sq mi). It freezes up in late October or early November and stays under the ice until late April or early May."@en . . .