The Cerro de la Viga is a mountain located in the municipalities of Arteaga, Coahuila and Santiago, Nuevo León in northeastern Mexico.

Its peak named Cerro San Rafael culminates at 3,712 m above the sea level and has a prominence of 1,395 m. It is the highest point in Coahuila and the second highest point in the Sierra Madre Oriental and in northern Mexico.

Its 40-km-long ridge is the border between Coahuila and Nuevo León over 22 km.

In June 2011, a fire affected the southern side of the mountain.

This article about a location in the Mexican state of Coahuila is a stub.