Narphu The Hidden Valley
Trekking in Restricted or Special Area of Nepal needs special trekking permit. Environmentally, Culturally and politically very sensetive area of Nepal are listed as restricted area. Upper Mustang, Upper Dolpo, Manaslu, Tsum Valley, Kanchenjunga, Makalu are the popular trekking destinations needs special trekking permit from Government of Nepal.
There are many reasons why the restricted areas exist. In most cases, it is a hangover from a time when the border with China was more sensitive than it is now. Environmental groups, particularly the Nepal Nature Conservation Society, are pressuring the government to keep some places closed for ecological reasons to avoid both cultural and environmental degradation.