Adrar lies at an elevation of 258 metres (846 ft) above sea level. A large oasis lies to the southwest of the town; this oasis lies in the Tuat region, a string of oases running from Bouda in the north to Reggane in the south. A vast area of sand dunes, the Erg Chech, lies to the west, while a large rocky plateau, the Tademaït, lies to the east.