The Kūnaṛ River (), also known in its upper reaches as the Mastuj (), Chitral (; ), or Kama River (), is about long, located in eastern Afghanistan (Nuristan, Kunar, Nangarhar) and northern Pakistan (Khyber Pakhtunkhwa). It emerges just south of the Broghil Pass, in the upper part of Chitral District of Khyber Pakhtunkhwa near the Afghan border. 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.