The Natural Park, a mountainous region, lies between an altitude of 800 m from the lowest valley bed and 2,648 m at the top of the canal Baridana, and it is considered to be of great interest for its wide diversity in geology, vegetation and fauna.
Two great mountain ranges of Cadí and Moixeró, joined by the Tancalaporta pass, form an impressive mountain barrier stretching from West to East for some 30 km, including the watersheds of the Segre (Cerdanya and Alt Urgell) and Llobregat (Berguedà) rivers. The mountain slopes, particularly those of the North, form craggy escarpments with almost sheer rock walls and deep valleys, quite different from the other geological entities of Pedraforca, Tosa and Puigllançada.