Between the Ebro depression and the Iberian mountain range the autonomous region of La Rioja lies in the north of Spain. It borders the Basque Country and Navarre in the north, Aragon in the east, and Castile and Leon in the south and east. This one province autonomous region lies between the Ebro depression and the Iberian mountain range, and includes the Demanda sierra with its San Lorenzo peaks (2,262 m) and the Cameros Nuevo sierra (1,877 m). The plains stretch over the central part of the region forming the Ebro depression, where the river Ebro flows through the northern reaches of the region. The river continues its route along Conchas de Haro in the west and exits La Rioja through Alfaro in the east. Other rivers that flow from the Ebro basin are the Oja, el Najerilla, el Iregua, el Leza, el Cidacos and el Alhama rivers.