The Río Narcea is a river located in the northern region of Spain, specifically in the province of Asturias. It flows for approximately 90 kilometers, starting in the Picos de Europa mountain range and eventually merging with the Río Nalón. The river is known for its scenic beauty and rich biodiversity, making it a popular spot for outdoor activities like fishing and hiking. The river's basin is characterized by steep valleys and lush forests, providing a habitat for various wildlife species. The Río Narcea also plays a significant role in the local economy, supporting agriculture and tourism in the surrounding areas. Its waters are essential for irrigation and contribute to the region's natural landscape.