It includes 15 different municipalities: Monsagro, El Maíllo, Serradilla del Arroyo, La Alberca, El Cabaco, Nava de Francia, Mogarraz, Herguijuela de la Sierra, Monforte de la Sierra, Madroñal, Cepeda, Villanueva del Conde, Miranda del Castañar and Sotoserrano[1] San Martin del Castañar was added on 18 December 2008.

Other birds present in the park includes common cuckoo, red-legged partridge, woodpigeon, European turtle dove, European robin, reed bunting, common blackbird, Iberian grey shrike, grey wagtail and white wagtail and the Eurasian blue tit.

[3] The region of the Sierra de Francia is formed by an intricate depression covered by the Alagón River.

Within it there are two hidden rough and rugged valleys, which provide places of safe haven and perfect hiding, but this also creates an oppressive narrowness.

[4] Traditional culture and architecture is highly conserved in the municipalities of the Sierra.