The Atlas Mountains is a mountain range which stretches across northwestern Africa extending about through Algeria, Morocco and Tunisia. The highest peak is Jebel Toubkal, with an elevation of in southwestern Morocco. The Atlas ranges separate the Mediterranean and Atlantic coastlines from the Sahara Desert. The population of the Atlas Mountains is mainly Berbers. The terms for 'mountain' in some Berber languages are adrar and adras, believed to be cognate with the toponym.