Tsum Valley (Hidden Valley) is located at an altitude of 1905 to 5093 meters and is rich in Tibetan culture, traditions, and ancient art and mostly untouched by modern civilization.
Tsum Valley is bounded by Boudha Himal and Himal Chuli in the west, Ganesh Himal in the south, and Siring Himal (7187m) in the north. The trail passes through two significant villages in the region, Chumling (Lower Tsum) and Chhaikampar (Upper Tsum).