For the first time walkers can take a guided trek traversing the entire length of the Himalayas in Nepal. Stretching for 1,700km along the length of Nepal, the Great Himalayan Trail will take you a mere 157 days to complete. You'll see eight of the world's 14 peaks over 8,000m, including Everest, and cross passes reaching up to 6,000m, climbing a total of 150,000m.