The Kanas Lake (kā nà sī hú 喀纳斯湖), a frigid highland valley lake, nestling at the foot of the Youyi (Friendship) Peak of the Altai Mountains (ā ěr tài shān 阿尔泰山), is actually the widest section of the Kanas River, a tributary of the Erix River. Kanas is the only outstretched belt of S