The range belongs to the Sistema Central. Its northern limit is considered the Río Sonsaz while Tamajón's territory is its southern border; from West to East the mountain range stretches from the valley of the Arroyo de la Matilla to the Río Sorbe.
Its highest point is the Ocejón, at 2068 metres.[1] The northern part of the zone is scarcely inhabited and most of the population lives in the South of the range.
The villages of the sierra are well known for their typical sheep breeds.[2]
Sierra del Ocejón area is also considered one of the places in Spain where the Arquitectura negra, a traditional building technique based on a wide use of slate, is very well preserved.[3]
DÍAZ MARTÍNEZ, Miguel Ángel y LÓPEZ BALLESTEROS, José Alberto (2003). La sierra de Ayllón (in Spanish). Madrid: Ediciones El Senderista. ISBN84-95368-22-6.{{cite book}}: CS1 maint: multiple names: authors list (link)
PLIEGO VEGA, Domingo (1998). Los dosmiles de la sierra de Ayllón (in Spanish). Madrid: Desnivel ediciones. ISBN84-89969-03-5.