Adi Shankaracharya trekked in Garhwal Himalayas in 8 th century A.D. and was the pioneer who opened trekking routes in this part of the country. These mountains offer umpteen possibilities to the initiated. There are many places to be discovered, which remain untouched by human devastation, where you can see the Himalayas in all their regal splendour. Trekking is best enjoyed in smaller groups, not exceeding eight or ten. This also allows the hillside to regenerate.
Larger groups create administrative problems unless organised well.
Indian nationals need no permission for trekking in any area outside the Inner Line. For routes inside the Inner Line, the local District Magistrate's permission or that of the Central Home Ministry is necessary in advance. For foreigners, crossing the Inner Line is not permitted. Treks up to 4,900 m need no permission and can be undertaken on tourist visas. Above 4,900 m, treks can also be undertaken with prior permission from the IMF, provided no peak is attempted.