Mount Elgon is an extinct volcano and one of Uganda’s oldest geological formations, with its first eruption occurring around 24 million years ago. At one point in history, it was Africa’s tallest mountain, standing even higher than Kilimanjaro’s 5,895m. However, millions of years of erosion have gradually reduced its height to 4,321m, ranking it as the 4th highest peak in East Africa and the 8th highest on the continent.