Irtysh River

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Irtysh River
Country Russia, Kazakhstan, China, Mongolia
Physical characteristics
River mouth Ob River
Length 4,248 kilometres (2,640 mi)

The Irtysh River (Russian: Иртыш; Kazakh: Ertis / Ертiс; Chinese: 额尔齐斯河 / É'ěrqísī hé; Mongolian: Эрчис мөрөн, "Twirl"; Tatar Cyrillic: Иртеш, Latin: İrteş) is a river in Siberia and Kazakhstan. It is the main tributary of the Ob River. The main tributary of the Irtysh is the Tobol River. The Ob-Irtysh forms a major drainage basin in Asia, and covers most of Western Siberia and the Altay Mountains.