To "Trek" in the Himalayas means to set off from a given town, village or air field and to wonder through fields and hamlets, along valleys and streams or up mountain slopes to any altitude at one's choice, but usually not above 18,000 ft. (5,500m)Trekking- hiking along the trails that form the main links between Nepal's isolated villages and settlements is one the country's main attractions. The word trekking was almost unheard of in Nepal until the sixties but many of today's visitors came to Nepal solely to trek.