The Kulma Pass (Tajik: , ) or Qolma Pass, also referred to as Karasu Pass, is a mountain pass across the Pamir Mountains on the border between Murghob District, Gorno-Badakhshan Autonomous Region in Tajikistan and Taxkorgan Tajik Autonomous County, Kashgar Prefecture, Xinjiang Uygur Autonomous Region in China. Asian Highway AH66 runs through the pass, which provides for the only modern day overland border crossing along the 450 km boundary between the two nations.