Aveyron is in the southern half of the central plateau ("Massif Central") of France. The mountainous areas (the Aubrac mountains, Palanges Levezou and Lacaune) cover little more than a third of the territory, with the highest point in "Signal de Mailhe-Biau" (the northwest peak, ) that is high and is in the region called "Cazalets"; the remaining two thirds are occupied by hills and plateaus (Ségala, Viadène, Lagast and Grands Causses), with a few valleys.