The Kunar River (Kunar Rud) is about 480 km long. It is in eastern Afghanistan and northwestern Pakistan. The Kunar river system is fed from melting glaciers and snow of the Hindu Kush mountains. The Lutkho River joins the Mastuj River just north of the important regional centre of Chitral in Pakistan and is then called the Chitral River, before flowing south into the upper Kunar Valley in Afghanistan, where it is referred to as the Kunar River.