Bara Shigri Glacier, the largest glacier in Himachal Pradesh
, is located in the
of Lahaul and it feeds the river
. This glacier, 25 km long and about 3 km wide, lies on the middle slopes of the main Himalayan
range. On the three sides of it, it has high mountains. The Chandertal lake is believed to have formed from this glacier after the great disaster in the Chadra valley in 1936. This glacier was conquered by women mountaineers in 1956. The Chandra valley also has a number of prominent glaciers.