Karachukar Valley or Chalachigu Valley is a valley in Taxkorgan Tajik Autonomous County, Xinjiang, China. It contains the basin of the Karachukar River, a tributary of the Tashkurgan River, and is regarded as part of Taghdumbash Pamir. The valley borders Afghanistan to the west and northwest, Tajikistan to the north, and Pakistan to the south. The name of the valley is from Kyrgyz, meaning "black cave".

Tashkurgan Tajik Autonomous County is an autonomous county of Kashgar Prefecture, in western Xinjiang, China. The county seat is Tashkurgan. The county is the only Tajik (Pamiri) autonomous county in China.