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Chulym (chōōlĬm´), river, c.1,075 mi (1,730 km) long, Krasnoyarsk Territory, S central Siberian Russia. It rises in the eastern slopes of the Kuznetsk Alatau and flows N and W through Krasnoyarsk Territory and Tomsk region into the Ob. Its lower course is navigable. Another Chulym River, 140 mi (225 km) long, in SW Siberia, feeds Lake Chany.