The Sierra de la Demanda is a mountain range located in northern Spain, primarily within the Burgos province. It is part of the larger Iberian System and features a variety of landscapes, including forests, rocky peaks, and valleys. The highest peak, San Millán, reaches an elevation of 2,228 meters. This region is known for its rich biodiversity and is home to several protected areas. The Sierra de la Demanda offers numerous outdoor activities, such as hiking and wildlife observation, making it a popular destination for nature enthusiasts and tourists seeking adventure in the mountains.