The river is formed by the confluence of the long
Irgichyan originating in the NW
Selennyakh Range and the long
Baky, which has its source in Lake Baky, located at the junction of the western end of the
Polousny Range and the
Kyun-Tas. After flowing in a roughly southern direction in its upper course, the Uyandina flows then eastwards through the
Aby Lowland. Finally it meets the left bank of the Indigirka from its mouth. The Uyandina freezes up in October and remains icebound until late May or early June.
Tributaries The biggest tributaries of the Uyandina are the long
Khatyngnakh and long
Khachimcher from the left, as well as the long
Buor-Yuryakh from the right. ==See also==