The Gran Sasso and Monti della Laga National Park is a natural park in central Italy. Established in 1991, it covers an area of 2,014 square kilometres, mostly within the provinces of Teramo, L'Aquila, and Pescara in Abruzzo, with small areas in the provinces of Rieti in Lazio and Ascoli Piceno in Marche. The terrain is predominantly mountainous with alpine plains. It is managed by Ente Parco Nazionale Gran Sasso e Monti della Laga, with headquarters in Assergi, L'Aquila.