Sust or Sost is a village in Gojal, Upper Hunza, Gilgit–Baltistan, Pakistan. It is the last town inside Pakistan on the Karakoram Highway before the Chinese border. The town is an important place on the highway for all passenger and cargo transport because all traffic crossing the Pakistan-China border passes through this town; the Pakistani immigration and customs departments are based here. Pakistan and China have opened border for trade and tourism at Khunjerab.