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Pangong Tso is a lake in the Himalayas situated at a height of about 4250 m. It is 134 km long and extends from India to Tibet.  It is 5 km wide at its broadest point. In winter, the lake freezes completely despite being salt water.

Pangong Tso can be reached in a five-hour drive from Leh, most of it on a rough and dramatic mountain road. The road traverses the third-highest pass in the world, the Changla Pass, where army sentries and a small teahouse greet visitors. The spectacular lakeside is open during the tourist season, from May to September. A special permit is required to visit the lake. While an Indian can get his individual permit at Leh, non-Indian nationals need to be in a group of at least four. For security reasons, no boating is allowed. There is a small hostel as well as campsites and houses with primitive guestrooms in the village a few miles towards Tibet.

The lake is in the process of being identified under the Ramsar Convention as a wetland of international importance. This will be the first trans-boundary wetland in South Asia under the convention.