The Yug joins the Sukhona near the town of Veliky Ustyug, forming the Northern Dvina, one of the biggest rivers of European Russia.

The towns of Veliky Ustyug and Nikolsk, as well as the district centers Kichmengsky Gorodok and Podosinovets, are located on the banks of the Yug.

The river flows southwest, enters Nikolsky District, runs all the way almost to the border of Kostroma Oblast and sharply turns northwest.

The river course runs further to the north, re-enters Kichmengsko-Gorodetsky District, turns northeast, accepts the Kichmenga from the left in the selo of Kichmengsky Gorodok, and enters Kirov Oblast.

In 14th-15th century the upper course of the Yug, around Nikolsk, was a disputed territory between Grand Duchy of Moscow and Novgorod Republic.