The 5-day option is one of the most difficult of all Kilimanjaro treks, not only requiring great hiking skills and stamina, but also prior acclimatization on lower mountains. A 6-day variation is considerably better, requiring medium physical effort and offering a more reasonable acclimatization transition. Machame 7-day and Lemosho 7 and 8-day treks all offer considerably less challenging hikes and have higher successful summit ratings.