The Karatag or Qoratagʻ is a river of northwestern Tajikistan and eastern Uzbekistan. It flows through Shirkent National Park and flows down the south slopes of the Gissar Range mountain range. Large seismic landslides occur in the river basin and it also contains several glacial lakes. It is an inflow to the Surkhandaria River. Zambar River and the Diakhandara River are tributaries, the latter of which meets the Karatag at the Diakhandara Glacier.
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