Trans-Mexican Volcanic Belt
The Bajío dry forests lie in the southwestern portion of the Mexican Plateau. They are bounded on the southeast, south, and southwest by the Trans-Mexican Volcanic Belt pine-oak forests, which occupy the folded mountains and volcanoes of the Trans-Mexican Volcanic Belt that form the southern edge of the Mexican Plateau. The Sierra Madre Occidental pine-oak forests of the Sierra Madre Occidental bound the ecoregion on the northwest.