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 previously. Many places of Nepal are still controlled by the Government of Nepal to enter the foreigners with only proper permit. For the special purpose the area are controlled strictly to entry. Upper Mustang, Upper Dolpo, Manaslu, Tsum Valley, Kanchenjunga, Makalu are the popular trekking destinations needs special trekking permit from Government of Nepal.
Officially there are no longer any restricted areas in Nepal. The immigration office rules now state that "trekkers are not allowed to trek in the notified areas previously known as restricted". Rather than get involved in all this semantic complication, the term "restricted" is used here to refer to places that are closed to trekkers, or open to trekkers only when accompanied by a policeman (a liaison or "environmental" officer), Our restricted area trekking package suggest you how to travel in these places. Most of the Tibetan border side places are consider as restricted area and possible to travel only with a liaison officer and pay for a special permit.