The Arrei Mountains also known as the "Roof of Ali Sabieh", are a mountain range in the southern Ali Sabieh Region in Djibouti. With an average elevation of 1,301 metres (4,268 ft) above sea level, the sixth highest point in Djibouti, they are situated near the border with Ethiopia. The mountains constitute the highest point in Ali Sabieh region. The Issa Somali have a long history in the Arrei Mountains.