How long is the Ob River from the Biya and Katun confluence to the Gulf of Ob?
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Ob River
The Ob and Yenisey river basins and their drainage networks.
The Ob River is formed by the confluence of the Biya and Katun rivers in the foothills of the Altai Mountains. From this junction to its outlet in the Gulf of Ob, the river has a course of 2,268 miles (3,650 km).1