The higher slopes are covered with scree, loose stones resembling gravel, making it more difficult to negotiate. The main glaciers edging their way down the slopes of Kibo are Heim, Rebmann, Decken, Arrow and some smaller ones. These glaciers form the permanent ice cap of the mountain, although they are, as a result of global warming, believed to receding each year.
There are various routes to the summit, of which the Marangu, Machame, Shira and Umbwe are most famous. Marangu is also the easiest, much preferred by most tourist, however, the Machame route offers some stunning view.