What are Mexico's three major mountain ranges?
Mexico consists of an entire mountain system known as the Sierra Madre. The three ranges it consists of are called Sierra Madre Occidental, Sierra Madre Oriental, and Sierra Madre del Sur.
The mountain system is located in central Mexico. "Western" in Spanish is "occidental," meaning Sierra Madre Occidental is to the west. "Eastern" in Spanish is "oriental," meaning Sierra Madre Oriental is to the east. "Southern" in Spanish is "del sur," meaning Sierra Madre del Sur is to the south.
Fun Fact: Sierra Madre Oriental contains the largest point in Mexico called the Pico de Orizaba (or "Peak of Orizaba [Mexican city]").