The Isfara is a river of the Syr Darya basin in Kyrgyzstan, Tajikistan and Uzbekistan. In its upper course, it is called Ak-Suu, in its middle course Karavshin.
One of the northern extensions of the Pamir-Alay system, the Turkestan Range stretches for a total length of 340 km from the Alay Mountains on the border of Kyrgyzstan with Tajikistan to the Samarkand