The Sierra de El Abra is a mountain range located in northeastern Mexico, primarily within the state of Nuevo León. It is part of the larger Sierra Madre Oriental and features rugged terrain, steep cliffs, and diverse ecosystems. The area is known for its unique geological formations and rich biodiversity, making it a popular destination for outdoor activities such as hiking and rock climbing. This mountain range is also home to various species of flora and fauna, some of which are endemic to the region. The Sierra de El Abra plays a significant role in the local climate and hydrology, influencing weather patterns and water sources for nearby communities. Its scenic landscapes attract nature enthusiasts and researchers alike.