The border-ridges of the Alai Mountains, the Khantengri group, the Sailughem range and the West Sayan contain the highest peaks of their respective regions.
The chief feeder of the lake is the Ili, which rises in the Khantengri group of the Tian-shan Mountains.
Khantengri (Mushketov, Semenov, Inylchik) and the Kok-su Mountains (Fedchenko, Shurovsky), south of Peak Kaufmann, there are welldeveloped glaciers.
Thus the Kuruktagh are linked, by the Kok-teke, on to the Khalyk-tau of the Khantengri group. The Khaidyk-tau, which are crossed by the passes of Tash-againyn (7610 ft.) and Kotyl (9900 ft.), are not improbably connected orographically with the Trans-Ili Ala-tau, or its twin parallel range, the Kunghei Ala-tau, in the west, in that they are an eastern prolongation of the latter.