The Naryn rises in the Tian Shan mountains in Kyrgyzstan, Central Asia, flowing west through the Fergana Valley into Uzbekistan. Here it merges with the Kara Darya (near Namangan) to form the Syr Darya. It is 807 km long (together with its upper course Chong-Naryn) and drains a basin area of 59100 km2. It has an annual flow of 13.7 km3. The river contains many reservoirs which are important in the generation of hydroelectricity. The largest of these is the Toktogul Reservoir in Kyrgyzstan containing 19.9 km3 of water. Dams downstream of the Toktogul in Kyrgyzstan include: Kürpsay, Tash-Kömür, Shamaldy-Say and Üch-Korgon. Upstream of Toktogul in Kyrgyzstan are the Kambar-Ata-2 and At-Bashy Dams while the Kambar-Ata-1 Dam is in planning stages. Some places along the river: Kyrgyzstan: Kara-Say (see Barskoon), Naryn Region, Naryn, Dostuk, Jalal-Abad Region, Kazarman, Toktogul Reservoir, Kara-Köl, Tash-Kömür.

Tributaries

The main tributaries of the Naryn are, from source to mouth: