The colossal Himalayan Mountains form a border between the Indian subcontinent and the rest of Asia. The Himalayas are the world's tallest mountains, towering more than five miles above sea level. The Himalayas include Mount Everest which is the tallest mountain in the world. Everest rises 29,028 feet above sea level on the border between India and Nepal. No plant life grows near the mountain's peak due to powerful winds, extremely cold temperatures, and a lack of oxygen. Himalaya means 'home of snow' because the tallest peaks of the Himalayas are always capped with snow.

Trekking,the most popular activity in Nepal,is the best way to experience the natural splendor and cultural riches of the Himalayas. Differences in altitude provide not only a wide range of vegetation types and lifestyles,but also famous peaks shelter remote mountain villages that are untouched by modern ways of life.

Most treks follow well-used foot trails that have been in use for hundreds of years, connecting pastoral settlements, little mountain villages of stone and wood, and monasteries, temples and shrines. Trekking is not a solitary wilderness experience, as trails are shared with pilgrims and traders driving fully laden yaks or donkeys over the high mountain passes. Herders and other parties of tourists can also provide some company, along with their guides and quick-footed porters beneath their enormous loads. Trails cross high over rivers on swaying suspension bridges, meandering up valleys and past green terraced fields, through Tibetan-style stone hamlets a-flutter with colorful prayer flags, where ancient prayer wheels on the main route are kept spinning by the stream of passers by.

Whatever region one chooses to trek in, the magnificent scenery is always dominated by soaring heights and icy mountain peaks. Different regions allow a range of trekking options, from easy walking for a few days to strenuous expeditions lasting a few weeks, from circular routes around the Annapurnas, to summit assaults on Mount Everest. There are also different approaches to trekking in Nepal, depending on time, money and experience. Organized, all-inclusive treks include porters, guides, cooks, tents, equipment and transport, and provide comfort and security as well as eliminating lengthy preparations beforehand. Teahouse treks follow the most popular trekking routes in the entire Annapurna region, Langtang area and the Everest region, and allow walkers to make their own way from village to village, carrying minimal equipment and relying on 'teahouses' for food and accommodation. It is also possible to hire a guide and/or porters for these expeditions. For those wanting to get away from it all there are also many less-developed routes in more remote regions.

A trekking permit is no longer required in many regions, including the popular Annapurna, Everest and Langtang areas; however a fee must be paid to trek in a designated national park, conservation area or wildlife reserve, which can be paid at the entrance (Rs 1,000 or Rs 2,000 for most areas). The Annapurna region requires the fee to be paid in advance at the ACAP office in Kathmandu or Pokhara, (Rs 2,000), which goes towards environment conservation and maintenance of the area.