 The mountains run for a length of about between the Italian Regions of Abruzzo, Marche and Lazio.In doing so they border the Italian Provinces of Teramo, L'Aquila, Ascoli Piceno and Rieti.Monti della Laga is cut off from the Gran Sasso d'Italia mountain chain by the narrow Vomano Valley which itself leads to Passo delle Capannelle and the Lago di Campotosto (Lake of Campotosto).