There is very low population density in the area as villages are few and sparsely inhabited.[2]
This mountain chain divides the Atlantic from the Mediterranean watershed, with rivers Tajuña, a tributary of the Tagus, and the Mesa River, a tributary of the Piedra which is part of the Ebro system, having their sources in this range. In the Sierra de Solorio there is the largest Spanish Juniper forest in Europe. The Common Juniper is also found in the range.[3]