Upper Mustang trekking is one of the most mysterious and least known kingdoms in the world. Trekking in the area is mostly organized during the rainy season. This isolated kingdom of Mustang prospered in the 15th century when its strategic location enabled to salt trade between Tibet and Nepal. The landscape of Mustang is dry, with naturally carved sandstone pillars and discontinuous moraine terraces, these all present naturally a colorful variety made up of red, yellow, and brown together. It is comparably considered to be one of the easy trekking in Nepal. The trekking to Mustang is through an almost treeless landscape and infertile landscape. You experience the strong wind blowing across the area as it is a rain shadow area of Nepal.