Geography of the Sierra de Aracena Natural Park
The Natural Park of Sierra de Aracena & Picos de Aroche (official title in Spanish) is located in the far west of the Sierra Morena Mountain range, in the province of Huelva, bordering on the west with the Portuguese region of Alentejo and to the north, with that of Extremadura. It is considered as mid-mountain, with an average altitude of 500 metres, from a north-north west to a south-south east direction. The highest peaks are in the north of the Natural Park, plus those of El Castaño (in Castaño del Robledo) and San Cristóbal (in Almonaster La Real) in the centre.
The Guadiana and Guadalquivir rivers have influenced the terrain, resulting in extensive soil erosion and the formation of a series of valleys that have led to the exposure of large areas of rock in some of the higher areas.