The mountains in La Rioja are part of the Iberian System. This mountain range extends to the south of the Ebro river, parallel to it at a distance of about , with altitudes ranging between . From the mountain range the Sierra de la Demanda runs northwards, into the heart of La Rioja, incorporating Monte San Lorenzo which, at , is the highest peak in the province. Other mountains include Sierra de Camero Viejo, Sierra de Camero Nuevo, Sierra de Cebollera, and Picos de Urbión.