Sierra Madre del Sur, Mountain range in southwestern Mexico.
Sierra Madre del Sur is a mountain range spanning Guerrero and Oaxaca states, featuring dense forests draped across steep slopes and deep valleys cut into the terrain. Its highest peaks reach about 3,700 meters (12,100 feet), creating a dramatic spine that divides the coast from inland areas.
Mixtec and Zapotec peoples established settlements in these mountains long before Spanish arrival, developing farming practices suited to steep terrain. These early civilizations left a lasting mark on how the region is inhabited and used today.
Indigenous communities have lived here for centuries, farming the steep slopes using methods passed down through generations. Their way of life remains connected to the seasonal cycles and natural rhythms of the mountains.
Access to the mountains is mainly through San Juan Ozolotepec and towns in Guerrero, where several trails begin for exploring the landscape. The dry season offers the best conditions for hiking and traveling through the range.
The Balsas River cuts through the range, creating a natural corridor where different climate zones exist side by side, from tropical forests at lower elevations to mountain environments higher up. This river has shaped the landscape over thousands of years and remains vital to the region's ecology.
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