Mount Everest is one of the highest peaks in the world, located on the border of Nepal and Tibet, China. It has 2 based on both countries, but for Trek Nepal, the Nepal side is most suitable. If you are looking for Everest Base Camp Trek in Nepal connect to Mission Summit Treks, They local agency in Nepal it takes 12 days from Kathmandu to Kathmandu. https://www.missionsummittreks.com/trip/everest-base-camp-trek/