The Alpilles massif is a low altitude mountain range, made up of limestone white rocks. It stretches from west to east between Tarascon and Orgon over an area of ??50,000 hectares and sixteen municipalities. It is one of the emblematic reliefs of the Bouches-du-Rhône, dominating in the north the gardening lowland of Saint-Rémy-de-Provence and in the south the Crau lowland The Opies, to the east of the massif, constitute its culminating point, with 498 meters of altitude.