A responsible operator does not send one guide with ten climbers. The guide ratio matters enormously. At Vertical Sky, our lead guide is supported by assistant guides in a ratio that ensures every climber is properly supervised throughout the expedition.

One of the most extraordinary things about climbing Kilimanjaro is how completely the world changes around you as you ascend. Within eight days you traverse five distinct climate zones — from lush equatorial rainforest to arctic glacial summit. Here's what to expect from each one