Located in the west of the Vallès Occidental comarca (county), on the border with Baix Llobregat, Ullastrell occupies a raised ridge between valleys giving it a privileged viewpoint of the Vallès. Montserrat mountain rises above the village landscape dotted with blueish forests and cultivated fields. Many of the old masias (farmhouses) that gave rise to the village are still preserved today interspersed within the urban layout.