The Tyugyuene is a left
tributary of the Lena. It has its origin at the confluence of the long Ysyakh-Yuryage and Kupsuyu-Yuryakh streams, at an altitude of about in the northeastern part of the
Lena Plateau, southwest of the abandoned village of Abaranda. It heads first a roughly northern direction to the east of the
Lungkha in its upper course, then it bends northeastwards in its middle course across the
Central Yakutian Lowland, changing again to northwards. There are small lakes in the broad
floodplain of the lower course of the river, and it
meanders strongly before reaching the Lena floodplain, vast and filled with lakes, to the east of the
Sitte. in some stretches the banks are high, with a cliff-like appearance. Finally it meets the Lena from its mouth. Its confluence is at the Khatyng-Tumusakh arm, by the village of
Khaptagay, near
Sangar on the facing bank. and a gas pipeline crosses the river about upstream from its mouth. The river freezes between mid October and the first half of May. In some stretches it freezes to the bottom. ==Flora and fauna==