The Cantabrian Mountains are a mountain range located in northern Spain, primarily in the regions of Asturias, Cantabria, and Castile and León. They stretch approximately 200 kilometers from the eastern coast to the western part of the country, forming a natural barrier between the northern coast and the interior plains. The range is known for its rugged terrain, deep valleys, and diverse ecosystems. This mountain range is home to several notable peaks, including Pico Tres Mares and Pico de la Maliciosa. The Cantabrian Mountains also feature rich flora and fauna, making them a popular destination for outdoor activities such as hiking and wildlife observation. The region's unique climate contributes to its lush landscapes and vibrant biodiversity.