Oiskii

a mountain range in the northern Zapadnyi Saian, between the valleys of the Oia and Kazyrsuk (a tributary of the Enisei) rivers. Elevations, to 2,006 m; length, approximately 80 km. The mountain range is composed primarily of schists and granites. Mountains of medium elevation predominate, with more contrasting relief and traces of glaciation (cirques) in the western section. The slopes are covered with cedar, larch, and fir taiga.