The Kochkor is a river in Kochkor District of Naryn Province of Kyrgyzstan. It is formed by confluence of Karakol and Seok rivers. The river is 45 kilometres (28 mi) long, the basin area 2,590 square kilometres (1,000 sq mi), and the average annual discharge 12.6 cubic metres per second (440 cu ft/s). The Chu is formed by the confluence of Kochkor and Joon Aryk near the village Kochkor.