The Belyanka originates in the
Munni Range at the confluence of rivers
Munni from the west and Tagyndzha from the east in the southwestern area of the
Verkhoyansk Range. The Munni flows from the slopes of the
Tagindzhin Range and its valley is bound by the eastern end of the
Muosuchan Range. In the upper section of its course the Belyanka river cuts across the mountainous terrain of the
Sorkin Range heading roughly southwards in a narrow valley. Soon it leaves the mountainous area and flows southwards flowing slowly and dividing into branches across the
Central Yakutian Lowland in a wide
floodplain. Close to its last stretch there are lakes and marshes. Finally the Belyanka meets the right bank of the Lena from its mouth, a little upstream from
Sangar and downstream of the mouth of the
Batamay and the confluence of the
Aldan. The river freezes between mid October and the end of May. ==Fauna==