Biysk is a city in Altai Krai, Russia, located on the Biya River not far from its confluence with the Katun River. It is the second largest city of the krai (after Barnaul, the administrative center of the krai). Population:

The city is called "the gates to the Altai Mountains", because of its position comparatively not far from this range. Chuysky Highway begins in Biysk and then goes through the Altai Republic to Russia's border with Mongolia.