Qarqar River (Azerbaijani: Qarqarçay, Armenian: Քարքար) is located de jure in Azerbaijan and de facto in Nagorno-Karabakh Republic, in the basin of Kura. Its length is 115 kilometres (71 mi), the area of the basin is 1,490 square kilometres (580 sq mi). The river begins on the Karabakh Plateau at the altitude of 2,080 metres (6,820 ft) and is formed by the confluence of the rivers Zarysly and Khalfali. The main tributaries are Ballyja, Badara and Daghdaghan. The Qarqar River is fed by the rain, snow and underground waters.
The Askeran fortress is situated on both of the Qarqar's banks.
- Azerbaijan Soviet Encyclopedia (1979), vol. 3, p. 70