The Indus River is one of the longest rivers in Asia. It flows through Pakistan, the Indian states of Jammu and Kashmir and Gujarat, and western Tibet (China). Originating in the Tibetan Plateau in the vicinity of Lake Mansarovar, the river runs a course through the Ladakh region of Jammu and Kashmir, towards Gilgit-Baltistan and then flows in a southerly direction along the entire length of Pakistan to merge into the Arabian Sea near the port city of Karachi in Sindh. The total length of the river is 3,180 km (1,980 mi).