Recent explorers have discovered century’s old Buddhist caves with paintings untouched since the 13th century. This semi autonomous and heavily Tibetan influenced region was "described by Tilman as fascinatingly ugly country, the more fascinating for being so little known" indeed, the trek to LO – Manthang is through an almost treeless barren landscape, a steep rocky trail up and down hill.
At present Mustang is a very popular trekking region in Nepal. The Home Ministry of Nepal announced the opening of the restricted areas in October 1991. There is also strict control in obtaining a special permit from the Department of Immigration to protect their tradition from outside influence as well as to protect their environment. The high desert region of the Tibetan influence, Kaligandaki, from the Tibetan border south to Kagbeni is generally referred to as “Upper Mustang" that has its own nominal king. The Mustang is one of the very few places on earth which is not spoilt by trekkers. Being under the rain shadow of the Himalayas, the area receives scanty rainfall making the region dry and arid-very similar to the adjoining Tibetan plateau. The trek to Lo-Manthang is through an almost tree-less barren landscape, a steep rocky trail up and down hill and panoramic views of Nilgiri, Annapurna, Dhaulagiri and several other peaks make your trek memorable.