The Kūnaṛ River, also known as the Chitral River, Mastuj River and Kaama River, is a 480 kilometres (300 mi) long river in northern Pakistan and eastern Afghanistan. It originates just south of the Broghil Pass, in the Upper Chitral District of Khyber Pakhtunkhwa province in Pakistan. It later merges with Kabul river in the Nangahar Province of Afghanistan. The river system is fed by melting glaciers and snow of the Hindu Kush mountains. The Kunar River is a tributary of the Kabul river, which is in turn a tributary of the Indus River.

Upper Chitral District (Khowar: توری ݯھیترارو ضلع‎)(Pashto: پورتنۍ چترال ولسوالۍ‎) is a district in the province of Khyber Pakhtunkhwa, Pakistan. Chitral River flows throughout the district. Upper Chitral District along with the Lower Chitral District were part of the erstwhile Chitral District which was the largest district in the Khyber-Pakhtunkhwa province of Pakistan, covering an area of 14,850 km2. Likewise, it served as the Chitral princely state that encompassed the region until its direct incorporation into the Khyber Pakhtunkhwa province of Pakistan in 14 August 1947. Upper Chitral District and Lower Chitral District were bifurcated from the erstwhile Chitral District in November, 2018.