Toshkan River

The Toshkan is a in the Tien Shan mountains in the border area between and Kyrgyzstan.

It is 345 kilometres (214 mi) long, and has a drainage basin of 8,270 square kilometres (3,190 sq mi) in Kyrgyzstan.

The Toshkan has its sources in the At-Bashi range and Kakshaal Too of the Kyrgyzstani of Naryn.

In its uppermost course, upstream of the confluences with the rivers Müdürum and Kökkyya, it is called Aksay; from these confluences to the border with , it is called Kakshaal.

It then flows towards the and into the Xinjiang province of .

It continues , running parallel to the Tien Shan mountains, until its confluence with the Aksu near the Aksu.

The Toshkan is the largest tributary of the Aksu.