 The Idel-Ural region, a collection of six federal subjects between the Volga River and the Ural Mountains, is generally considered as a part of the Volga Region, although the river does not run through each of them.Idel-Ural is within an extensive north-western protrusion of the Volga River's drainage basin, including numerous tributaries such as the Malaya Kokshaga River.It also includes sub-tributaries, such as the Belaya River which joins the Kama River, a tributary of the Volga.