Ever since Nepal’s tourism door was opened to the foreigners, it has been most well known most famous trek destination in the world. There are Several routes to choose for trekking but some routes are very popular. Langtang, Everest Annapurna are probably the most popular trekking routes in the world. There are many reasons to be these routes most popular. This reason were introduced to trekkers specially foreigners long time before. There are many proves where tourists trekked before 1950. There reason are easier to access. One can drive or fly to starting place easily. Clean comfortable lodges are also available along the routes. It is not necessary to bring own tents foods while doing trek. The tea houses serve fresh, delicious hygienic meals drinks throughout trekking. It is also easier to organize these trekking as the trekkers don’t need special trekking permission from ministry of tourism civil aviation. Remotes restricted routes required special permit that costs US$ 90 to US$ 700 per weeks but the popular routes such as Langtang , Annapurna Everest don’t required it so that it lower expenses on tourists also. There routes are possible to trek in all seasons.