Interior Asturias GR 109 Loop

This challenging mountain bike loop is approximately 60.7 km (37.7 miles) long and typically takes around 6 hours and 12 minutes of riding time to complete. However, given its 'difficult' rating and over 2,000 meters of elevation gain, plan for a full day, especially if you want to enjoy the scenery and take breaks.

The terrain is characteristic of the rugged Asturian relief within the Cantabrian Mountains. Expect a mix of high peaks, verdant meadows, deep valleys, and dense forests. You'll encounter challenging mountain routes with epic climbs and technical descents, including rocky sections. While the GR 109 is primarily a hiking route, this mountain bike loop utilizes sections suitable for experienced riders seeking demanding conditions.

The route offers stunning natural beauty and cultural insights. You'll enjoy beautiful views over the Salime Reservoir and pass through charming traditional villages like Santa Eulalia de Oscos. Keep an eye out for traditional Asturian architecture, such as granaries (hórreos), stone facades, and slate roofs, which are common in the region.

No, this specific loop is rated as 'difficult' due to its distance, significant elevation gain (over 2,000 meters), and technical terrain. It's best suited for experienced mountain bikers with good fitness levels. Beginners might find the gradients and rocky sections overly challenging. Asturias does offer easier 'Vias Verde' routes, but this is not one of them.

The best time to undertake this journey is between late spring and early autumn (roughly May to October). This period helps avoid winter snow and cold temperatures, which can make the high mountain passes impassable. Even in summer, Asturias can have a rainy climate and fluctuating temperatures, so always be prepared with warm and waterproof clothing.

The loop starts and ends near the Salime Reservoir, often from Grandas de Salime. While specific parking areas aren't detailed, Grandas de Salime is a common starting point for routes in the area, and you should find local parking options there. Always check local signage for regulations.

Generally, dogs are welcome on trails in Asturias, especially in rural and natural areas. However, it's crucial to keep your dog under control, preferably on a leash, to protect local wildlife and livestock. Always carry waste bags and ensure your dog is fit enough for a long, difficult mountain biking route.

The Interior Asturias GR 109 Loop traverses the Río Eo, Oscos y Terras de Burón Biosphere Reserve. Generally, there are no specific permits or entrance fees required for accessing trails within this Biosphere Reserve for recreational activities like mountain biking. However, always respect local regulations, especially concerning protected areas, wildlife, and private property. No special permits are typically needed for the GR 109 itself.

Yes, this route utilizes sections of several other official trails. You'll find yourself on parts of the Sendero Histórico: Asturias, Asturias Interior (Etapa 27), Ruta de la Mina de As Talladas, and Asturias Interior (Etapa 25). It also briefly touches the Camino Primitivo de Santiago and Camino de Santiago.

Yes, the route passes through or near several small villages, such as Santa Eulalia de Oscos and Grandas de Salime. These settlements typically offer basic amenities like cafes, small shops, and guesthouses or rural accommodation options. It's always a good idea to check opening hours in advance, especially in smaller, more remote villages.

The Cantabrian Mountains are rich in biodiversity. While mountain biking, you might spot various bird species, deer, or even wild boar. The region is also home to protected species like the Cantabrian brown bear and wolves, though sightings are rare. Always maintain a respectful distance and do not disturb any animals you encounter.