Those who plan to complete this trek should be in excellent physical shape and arrive prepared to handle high altitudes. You can choose to trek alone or with guides, but guides are recommended due to the more remote areas of this trip. You will need to obtain an Everest National Park permit to enter the area surrounding Mount Everest. Lastly, Nepal requires all international travelers (with the exception of Indian nationals) to present a valid international visa or purchase one at the Kathmandu airport.