Strenuous Trekking should only be undertaken by those with some previous mountain walking experience. They ascend to altitudes of up to 500m and involve some steep climbing, although it is necessary to use ropes. Treks at this level can he arranged for periods of 7-21 days. For a popular and spectacular trek, with the possibility of staying in well-developed tea houses, the Annapurna circuit is a good choice. A gradual ascent through a green river alley will lead you up to a number of high passes, where you will reach the altitude of 5416m.

This difficult trek will give you a close insight into Tibetan culture. Another understandably popular trek, with good tea house facilities, is the Everest Base camp. The goal of this trek speaks for itself, but in achieving it, you cross a glacier, see Mt.Everest and a whole variety of soaring peaks and experience the rich Sherpa culture. For a real adventure in wild and Makalu Base Camp the Makalu trek traverses many high passes before reaching the Base Camp at 5000m. The Tibetan plateau of Mustang is a wild, treeless desert. The last two treks are possible only if you camp.