The Vashka (Russian: Вашка) is a river in Udorsky District of the Komi Republic and Leshukonsky and Mezensky Districts of Arkhangelsk Oblast in Russia. It is a left and the biggest tributary of the Mezen. It is 605 kilometres (376 mi) long, and the area of its basin 21,000 square kilometres (8,100 sq mi). The principal tributaries of the Vashka are the (left), the (right), the (left), the (right), the (right), the (left), the (left), and the (right). The Vashka freezes up in late October and remains icebound until early May. The river was used for timber rafting till the 1990s.