| Karatag | |
| Mouth: | Surxondaryo |
| Mouth Coordinates: | 38.3124°N 68.0118°W |
| Progression: | Surxondaryo→ |
| Subdivision Type1: | Country |
| Subdivision Name1: | Tajikistan, Uzbekistan |
| Length: | 112km (70miles) |
| Tributaries Left: | Zambar, Payron |
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] The river is 112km (70miles) long.[3] 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]