The Sierra de Espina is a mountain range located in the province of Huesca, in the Aragon region of Spain. It is part of the larger Pyrenees mountain system and features rugged terrain, diverse flora, and fauna. The area is popular for outdoor activities such as hiking and climbing, attracting nature enthusiasts and adventure seekers. The range is characterized by its steep slopes and rocky peaks, with the highest point reaching approximately 2,500 meters. The Sierra de Espina is also known for its scenic landscapes, which include deep valleys and clear streams, making it a picturesque destination for visitors exploring the natural beauty of the Pyrenees.