The Karatag or Qaratogh, Qaratoghdaryo (Russian: Каратаг) is a river of northwestern Tajikistan and eastern Uzbekistan. It flows through Shirkent National Park and flows down the south slopes of the Hisar mountain range.[1] At its confluence with the Toʻpolondaryo, the Surxondaryo is formed.[2][3] The river is 112 kilometres (70 mi) long.[2] Large seismic landslides occur in the river basin and it also contains several glacial lakes.[4][5] Upstream from the confluence with the Payron, the Karatag is called Diakhandara. Another tributary is the Zambar.[6] The Diakhandara Glacier, which fed the upper course of the Karatag, has fully melted.[7]
