The Walia ibex is one of three endemic species in the Simien Mountains and the rarest of them. These large, surefooted wild goats live on the steep escarpment edges and cliff faces of the highest sections of the park, particularly around Chennek camp at 3,620 metres. The males carry spectacular curved horns that can reach 110 centimetres in length.
The best viewing area is the Chennek escarpment, where the animals graze on the steep grassy slopes below the cliff rim in the early morning and late afternoon. They are less approachable than the geladas — the ibex are more wary of humans — but patient observation from the cliff edge often reveals animals on the rock faces below. A spotting scope or long telephoto lens significantly improves the experience. Guides can point out current concentrations; ibex numbers in any given spot vary seasonally.