Picos de Europa National Park is a stunning mountain range offering diverse hiking and climbing opportunities. Accessibility varies greatly; some trails are easily accessible, while others require advanced skills and equipment. Solo hiking is possible for experienced individuals, but guided tours are recommended for challenging routes or those unfamiliar with the terrain. The best time to visit is during the summer months (June-September) when the weather is milder and trails are generally snow-free. Winter brings heavy snowfall, restricting access to many areas. The cost depends on activities, with hiking being relatively inexpensive and climbing requiring permits and equipment rental. A typical visit lasts several days to explore different areas of the park, with options ranging from day hikes to multi-day treks. Be prepared for variable weather conditions and pack accordingly. Wildlife sightings are common, including chamois, wolves, and birds of prey.