The Maestrazgo (Spanish: [maesˈtɾaθɣo]) or Maestrat (Valencian: [maesˈtɾat]) is a natural and historical mountainous region, located at the eastern end of the Iberian System mountain range, in Spain. It encompasses the north of the Autonomous Community of Valencia, in Castellón province, and parts of the east of the Aragonese province of Teruel.