The Sierra del Fraile, also known as "Cerro del Fraile", is a mountain and a protected area located in the García, Abasolo, Hidalgo, General Escobedo, El Carmen y Mina municipalities in the state of Nuevo León, México. The mountain is part of Sierra Madre Oriental; its summit elevation is 2,392 MASL, and its prominence is 1,592 meters. It is an ultraprominent peak, with a topographic isolation of about 23.5 km.