The Salar de Ollague is located due north, while the Salar de San Martin lies southwest and Salar de Chiguana northeast of Ollagüe. They are situated at elevations of . The Salar de San Martin and the Salar de Ascotán farther south form a northwest-southeast trending graben delimited by the same normal fault that crosses the edifice of Ollagüe. A ring plain formed by debris shed from Ollagüe surrounds the volcano.