The administrative district of Mustang is located in northern Nepal and is bordered by the Tibetan Autonomous Region of China to the north, the Myadi district to the south, Manang district to the east and Dolpo district to the west. The district covers an area of some 3,176 square kilometres and is drained by numerous tributaries in the north which merge for form the Mustang River. Additional tributaries flowing into the Mustang River form the Kali Gandaki, with its strikingly broad alluvial plain between the villages of Lete and Chhelegaon, a traditional trade route between Tibet and China for hundreds of years.