Tonguo

The Tonguo is a river in Yakutia, Russia. It is a right hand tributary of the Vilyuy, with a length of and a drainage basin area of.
The river flows across uninhabited territory of Verkhnevilyuysky District. Its confluence with the Vilyuy lies approximately to the northwest of Verkhnevilyuysk.

Course

The Tonguo begins on the northern slopes of the Lena Plateau. It flows roughly in a northward and northwestward direction along most of its course. After it descends into the Central Yakutian Lowland it meanders strongly. In its last stretch the Tonguo bends to the NNE. Finally it joins the right bank of the Vilyuy from its mouth. The river freezes in mid October and stays under ice until the second half of May.
The largest tributaries of the Tonguo are the long Loglor from the right and the long Tonguochan from the left.