Yenisey << `yen` uh SAY >> River flows through Siberia, a part of Russia. The Yenisey travels 2,543 miles (4,093 kilometers) from its origin in the Sayan Mountains of southern Siberia to its mouth on the Arctic coast. After the river leaves the mountains, it flows north. It enters the Kara Sea through an estuary (broad river mouth) about 200 miles (320 kilometers) east of the Gulf of Ob. Ocean steamers travel 400 miles (640 kilometers) up the river to Igarka, a lumber port. There are two hydroelectric stations along the river.