Bolshoy Anyui River
Coordinates: 67°N 163°E / 67°N 163°E
The Bolshoy Anyuy River or Bolshoy Anyui River (Russian: Большой Анюй; bolshoy meaning "great" or "large") is a river in the Kolyma River basin in Far East Siberia. It flows roughly westwards and passes through the sparsely populated areas of Chukotka. The Malyi Anyui River joins it from the north near the Sakha Republic border and the combined river (now called the Anyuy River) properly flows about 20 kilometres (12 mi) to meet the Kolyma at Nizhnekolymsk.
Its length is 693 kilometres (431 mi) and its basin area 57,200 square kilometres (22,100 sq mi). Most of the basin of the Bolshoy Anyui River and its tributaries belong to the Chukotka Autonomous Okrug administrative region of Russia.
In 1650, Mikhail Stadukhin and Semyon Motora found a portage from the upper Bolshoy Anyuy to the upper Anadyr River (probably its Yablon branch). This became the main cossack route from the Kolyma to the Pacific.
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