Pyasina River (Russian: Пясина) is a river in Krasnoyarsk Krai, Russia. The river is 818 kilometres (508 mi) long, and its basin covers 182,000 square kilometres (70,000 sq mi). The Pyasina River originates in Lake Pyasino and flows into the Pyasino Gulf of the Kara Sea. There are more than 60,000 lakes in the basin of the Pyasina covering a total area of 10,450 square kilometres (4,030 sq mi).