The Kunar River (Urdu,Pashto: کونړ سيند), also called the Chitral River (چترال سيند) or the Kama River (کامه سيند), is about 480 km long, located in northern Khyber Pakhtunkhwa, Pakistan, and eastern Afghanistan. The river system is fed by melting glaciers and snow of the Hindu Kush mountains. It is also part of the Indus watershed basin.
The river rises in the far north glaciated Hindu Kush mountains of Chitral, Khyber Pakhtunkhwa, Pakistan. Downstream as far as Mastuj it is known as the Mastuj River from there to its confluence with the Lutkho River just north of the important regional centre of Chitral. It is then called the Chitral River, before flowing south into the upper Kunar Valley of Afghanistan. At the confluence in Asadabad, historically Chaga Sarai, it meets with Pech River and finally empties into the Kabul River just to the east of the city of Jalalabad in Afghanistan. The combined rivers then flow eastwards into Pakistan again, roughly following the Grand Trunk Road through the Khyber Pass, and joining the Indus River at the city of Attock.
Mastuj مستوج is a town and Tehsil of Chitral District in Khyber-Pakhtunkhwa province of Pakistan. It is located at 36°17'0N 72°31'0E with an altitude of 2359 metres (7742 feet).
The main villages include Buni, Mastuj, Chuinj, Parkusap, Reshun, Parwak, Kuragh and Aveer. Mastuj is one of the most beautiful towns in Chitral. It is located at 36°17'0N 72°31'0E with an altitude of 2359 metres (7742 feet). Tehsil Mastuj starts right after the end of Baranis, Reshun, Kuragh, Buni, Aveer, Parwak, Mastuj, Chinar, Chuinj, Chapali, Kargin are the main areas of Tehsil Mastuj.