Chomoyummo, 1986. As preparation for the 1987 Kangchenjunga expedition, the Indian Army Assam Rifles climbed Chomoyummo (6823 meters, 22,368 feet) in northern Sikkim. (The first ascent was made by Dr. Kellas in 1911. It was again climbed in 1945 by T.H. Tilly, but recently this region has not been open to foreign expeditions.) They put two officers, two women, Dikila Gyatso and Pempa Bhutia, and 35 soldiers onto the summit on October 29, 1986.