Tobol

The Tobol (Тобол, Тобыл Tobyl, Тубыл Tubyl) is a river in Western Siberia (in Kazakhstan and Russia) and the main (left) tributary of the Irtysh. Its length is 1591 km, and the area of its drainage basin is 426,000 km².

History
The Tobol River was one of the four important rivers of the Siberia Khanate. In 1428 the khan was killed in a battle with the forces of Abu'l-Khayr Khan at the Battle of Tobol.

In the 16th century, the Tobol was the eastern terminus of the portage route leading westward to the rivers Vishera and Kama.

Cities and towns on the Tobol

 * Lisakovsk in Kazakhstan
 * Rudni in Kazakhstan
 * Kostanay (formerly Nikolaevsk) in Kazakhstan
 * Kurgan in the Russian Federation
 * Yalutorovsk in the Russian Federation
 * Tobolsk in the Russian Federation, where the Tobol joins the Irtysh

Main tributaries
The largest tributaries of the Tobol are, from source to mouth:


 * Syntasty (left)
 * Ayat (left)
 * Uy (left)
 * Ubagan (right)
 * Iset (left)
 * Tura (left)
 * Tavda (left)