Khudan (river)The Khudan is a river in Buryatia, southern East Siberia, Russia. It is long, and has a drainage basin of.Its average flow rate at the mouth is 12.7 m³/s.CourseThe Khudan is a left tributary of the Uda, of the Selenga basin. The river has its sources in the Khudan Range by the junction with the Tsagan-Khurtei range, to the northwest of high Mount Khudan, about west of Chita. The Khudan flows roughly in a WNW direction and meets the Uda from its mouth in the Selenga. The river is generally frozen from mid-October or early November until April or May.