What is the major mountain range and river in Mexico?

Mountain Range: The Sierra Madre mountain range is the major mountain range in Mexico. It consists of three parallel mountain chains: the Sierra Madre Occidental in the west, the Sierra Madre Oriental in the east, and the Sierra Madre del Sur in the south.

River: The Rio Grande (also known as the Río Bravo del Norte in Mexico) is the major river in Mexico. It forms part of the border between Mexico and the United States.