Nepal has some of the best trekking in the world, to and around several of the world's highest mountains, including Mount Everest. Many people visit the country just to trek and the tourism industry is well prepared to facilitate all manner of trekking styles and destinations. On the one hand you could spend a year planning an expedition to wild and lofty places; on the other you could land in Kathmandu with no plans and be on the trail to Everest Base Camp (EBC) in a matter of days.
Facilities available in remote areas are less extensive than in the more popular areas. Off the main trails where there are no lodges and food from menus a Nepali guide becomes essential, and it may be advisable or necessary to visit such regions with organised groups, including guide, porters and full support.