The Sierra de San Juan is a mountain range located in the central region of Mexico. It is part of the larger Sierra Madre Oriental and is known for its diverse ecosystems, including forests and grasslands. The area is rich in biodiversity, hosting various plant and animal species. This mountain range is also significant for its geological features, including limestone formations and unique rock structures. The Sierra de San Juan is a popular destination for outdoor activities such as hiking and birdwatching, attracting nature enthusiasts and researchers interested in its natural beauty and ecological importance.