Deepak Tal or Suraj Tal Lake also called Surya taal, is a sacred
body of water, literally means the Lake of the Sun God, and lies just
below the Bara-lacha-la pass (4,890m) (8 km (5.0 mi) in length) in the
Lahaul and Spiti valley of Himachal Pradesh state in India and is the
third highest lake in India, and the 21st-highest in the world.
Suraj Tal Lake is the source of Bhaga River which joins the Chandra
River downstream at Tandi to form the Chandrabhaga River in Himachal
Pradesh territory, and as it enters Jammu and Kashmir it is renamed as
the Chenab River. The Bhaga River (a tributary of the Chandrabhaga or
Chenab) originates from Surya taal. The other major tributary of the
Chandrabhaga, the Chandra originates from the glacier close to the
Chandra Taal lake in the Spiti district.