Rocher Rond lies in the foothills of the Alps, straddling the communes of Lus-la-Croix-Haute (in the department of Drôme) and Agnières-en-Dévoluy (in the department of Hautes-Alpes). It is preceded to the north (north to south) by the Grand Ferrand (big Ferrand, 2761 metres), and the Tête des Vautes (Head of Vautes, 2188 metres), which is connected to the main body of the mountain by the Col du Charnier (Col of the House of Death, lit. final resting place of the bodies or bones of the dead, 2103 metres), and the Plate Longue (long plateau or plate, 2383 metres), which is a pyramid of bare rock and generally regarded as a sub-summit of Rocher Rond. The east slope is snow-covered in winter, and is popular with skiers. There ridges leading off the summit to the north, north-east, and south.