It’s difficult to estimate the exact number of people who fail to summit Kilimanjaro each year, as success rates can vary greatly depending on a range of factors, including weather conditions, altitude sickness, physical fitness, and the quality of the tour operator and support team.

However, according to some estimates, the overall success rate for summiting Kilimanjaro is around 65%, meaning that roughly one-third of climbers do not make it to the top. This can be due to a range of factors, including altitude sickness, exhaustion, injury, or simply not being adequately prepared for the rigors of the climb.

That being said, the success rate can vary greatly depending on the route chosen and the level of support provided. Some routes, such as the Marangu route, have a lower success rate due to the shorter duration of the climb and higher altitude gain per day, while longer and more gradual routes like the Lemosho route tend to have higher success rates.

Ultimately, the key to success on Kilimanjaro is careful preparation, including proper training, acclimatization, and support from an experienced and reputable tour operator. With the right planning and support, many climbers are able to successfully summit Kilimanjaro and have an unforgettable adventure.