The Middle Atlas (Amazigh: Atlas Anammas) is a mountain range in Morocco. It is part of the Atlas mountain range, a vast mountainous region with more than 100,000 km², 15 percent of its landmass, rising above 2,000 metres. The Middle Atlas is the northernmost of three Atlas Mountains chains that define a large plateaued basin extending eastward into Algeria as the Tell Atlas. South of the Middle Atlas and separated by the Moulouya and Um Er-Rbiâ rivers, the High Atlas stretches for 700 km with a succession of peaks among which ten reach above 4,000 metres. North of the Middle Atlas and separated by the Sebou River, the Rif mountains are an extension of the Baetic System, which includes the Sierra Nevada in the south of Spain. The Barbary Ape is native to the Middle Atlas, and chief populations occur only in restricted range in parts of Morocco and Algeria.