Where is the OB river?

The Ob River is located in western Siberia, Russia. It is the seventh-longest river in the world, with a length of 3,650 km (2,268 miles). The Ob River is formed by the confluence of the Biya and Katun rivers in the Altai Mountains. It flows north through the West Siberian Plain and empties into the Gulf of Ob in the Arctic Ocean. The Ob River is a major waterway in Russia and is used for navigation, fishing, and hydroelectric power generation.