The Sierra Madre is a mountain range located in Mexico, stretching from the northern part of the country down to the southern regions. It is divided into two main sections: the Sierra Madre Oriental in the east and the Sierra Madre Occidental in the west. These mountains are known for their diverse ecosystems, rich biodiversity, and significant geological formations. The Sierra Madre plays a crucial role in the climate and hydrology of the region. It influences weather patterns and serves as a watershed for several rivers, including the Rio Grande and Rio Lerma. The range is also home to various indigenous communities and offers opportunities for outdoor activities like hiking and birdwatching.