Issyk Kul is a lake in the mountains of Tian Shan endorheic, northeast of Kirgizia. Length 182 km, width up to 60 km, and the extent of 6332 km ². And this lake is the world's second largest lake located in the mountains after Lake Titicaca. Located at an altitude of 1607 meters (5272 feet), with a depth of 668 meters (2192 ft). The water is somewhat salty lake in the winter and keep it free from ice. About 118 rivers and streams flow into this lake, the largest and Tyup Djyrgalan. The lake where the water is sourced from the many springs is currently recorded has no outlet, but some hydrologists hypothesize that the underground water of this lake to the River terfiltrasi Chu.