Mustang (from the Tibetan mun tan (Wylie: smon-thang), meaning "fertile plain") is the former Kingdom of Lo. It now forms part of north-central Nepal, borderingChina on the Tibetan plateau between the provinces of Dolpo and Manang.
The Kingdom of Lo, the traditional Mustang region and "Upper Mustang" are one and the same, comprising the northern two-thirds of the present-day Nepalese Mustang District. They are well-marked by official "Mustang" border signs just north of Kagbeni – where a police post checks permits for non-Nepalese seeking to enter the region – and at Gyu La (pass) east of Kagbeni.
Life in Mustang revolves around tourism, animal husbandry and trade. Apart from nine kilometers between Chhusang and Syangboche (just south of Ghiling (Geling)), it is bisected, as of August 2010, by a new road linking it to the Tibet Autonomous Region(TAR) to the north and to the rest of Nepal to the south. Plans call for these final nine kilometers to be linked within the next few years, at which time the road would become the lowest drivable corridor through the Himalayas linking the Tibetan Plateau to the tropical Indian plains. Ther highest point would be 4660 m at Kora La on the Mustang-TAR border. Currently, the easiest and only widely used road corridor, from Kathmandu toLhasa via the Arniko Rajmarg (Arniko Highway), traverses a 5125 m pass.
The influence of the outside world, especially China, is growing and contributing to rapid change in the lives of Mustang's people.
Mustang Trek opened in October 1991 to trekkers under a special permit is the most popular and fascinating trekking in Nepal. It was the former Buddhist kingdom of Lo, extended to the upper Kali Gandaki River which has carved the deepest gorge in the world between Dhaulagiri and Annapurna. Mustang has a long and rich history that makes one of the most interesting places in Nepal. Most of the people of this region are influenced by Tibetan culture. This route, almost treeless barren Landscape, steep rocky trail up and down the hill and eye-catching panoramic views of Mt. Dhaulagiri, Annapurna, Nilgiri and many other beautiful peaks is a very attractive trekking Destination . Not suffered from mass influx of tourists, the region has retained its unique and un-spoilt nature by less human impact in the area. The countryside of Lo Manthang is similar to Tibetan plateau with its endless expanses of yellow and gray rolling hills. At present Mustang is a very popular trekking region in Nepal. The region of the Tibetan influence, Kaligandaki, from the Tibetan border south to Kagbeni is generally referred to as “Upper Mustang". 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.