Kilimanjaro is composed of three distinct volcanic cones: Kibo, the highest; Mawenzi at 5,149 m (16,893 ft); and Shira, the shortest at 3,962 m (13,000 ft). Uhuru Peak is the highest summit on Kibo’s crater rim.Tanzania National Parks, a governmental agency, and the United Nations Educational, Scientific and Cultural Organization list the height of Uhuru Peak as 5,895 m (19,341 ft). That height is based on a British Ordnance Survey in 1952. Since then, the height has been measured as 5,892 m (19,331 ft) in 1999, 5,891 m (19,327 ft) in 2008, and 5,888 m (19,318 ft) in 2014.
Kilimanjaro is a large stratovolcano. Of its three peaks, Mawenzi and Shira are extinct, while Kibo, the highest, isdormant and could erupt again. The last major eruption has been dated to between 150,000 and 200,000 years ago.
Although dormant, Kibo has gas-emitting fumaroles in its crater. Several collapses and landslides have occurred on Kibo before, one creating the area known as the Western Breach.