Sierra del Mugrón is a 16.6 km (10 mi) long mountain range located between the shire of Valle de Cofrentes (Valencian: Vall de Cofrents), Valencian Community, and Almansa, Castile-La Mancha, Spain.

It is an isolated range between the Iberian System and the Cordillera Prebética.

Its highest point is 1,209 m. The northern section of this range is within the Ayora (Valencian: Aiora) municipal term, while the southern belongs to Almansa.

There are remains of an Ancient Iberian settlement in Castellar de Meca, between Ayora and Alpera.

This mountain range is a quiet lonely and isolated area with a sizeable amount of wildlife, foremost of which are the wildcat, boar, little bustard, Eurasian stone-curlew, peregrine falcon, European nightjar, black wheatear, common wood pigeon, Dartford warbler, red-legged partridge and Bonelli's eagle.