Unda

Unda is a river of the Transbaikal uplands and a right-bank tributary of the Onon. Its waters join the Onon before that river meets the Ingoda to form the Shilka, a major branch of the Amur. The Unda's valley lies amid the hills and steppe east of Lake Baikal, in a river system that ultimately carries its water across northeastern Asia to the Pacific.