Ventana Pass and Senda del Oso Loop

This mountain bike route is rated as difficult. While it incorporates sections of the generally easy Senda del Oso greenway, it also includes the challenging ascent to Ventana Pass, which features significant elevation gain and can involve dirt tracks, making it suitable for experienced mountain bikers.

The terrain is varied. You'll encounter sections of the Senda del Oso, which is a rail-trail with easy gradients, often paved or well-maintained. However, the route also includes more challenging ascents and descents, particularly around Ventana Pass, where you can expect steeper gradients and potentially unpaved or dirt track sections.

Yes, the route passes several interesting points. You'll go by the Huerta Cave, the scenic Valdemurio Reservoir, and the challenging Ventana Pass. The Senda del Oso section is also known for its numerous tunnels and bridges, as well as the bear enclosure in Proaza where you might spot Cantabrian brown bears.

The best time to ride this loop is generally during spring, summer, and early autumn. During these seasons, the weather is more stable, and the trails are less likely to be affected by snow or heavy rain, especially at higher elevations like Ventana Pass. Winter riding can be challenging due to snow and colder temperatures.

While the Senda del Oso section is generally popular with walkers and cyclists, including those with dogs, the overall difficulty and length of this specific loop, especially the challenging Ventana Pass section, might not be suitable for all dogs. If you bring a dog, ensure it is well-conditioned for long, difficult rides and always keep it on a leash, especially near wildlife areas like the bear enclosure.

No specific permits are generally required for mountain biking this route. The trail passes through the Parque Natural de Las Ubiñas-La Mesa, which does not typically charge an entrance fee for general access. However, always respect local regulations, especially concerning protected areas and wildlife.

Given that the route incorporates parts of the Senda del Oso, you can find parking in towns along that greenway, such as Proaza, Entrago, or Tuñón. For the full loop, consider starting points that offer convenient access to both the Senda del Oso and the ascent towards Ventana Pass. Some towns may offer dedicated parking areas for trail users.

Yes, this route utilizes significant portions of the Vía Verde Senda del Oso and also includes sections of the [CIMA AS01] Ventana. You will also find it briefly intersects with the Asturias Interior (Etapa 15) and the Camín Real del Puertu Ventana o Ruta de las Reliquias.

Along the Senda del Oso section, particularly in towns like Proaza or Entrago, you'll find various amenities including cafes, restaurants, and bike rental services. These services cater to the many visitors enjoying the greenway. However, facilities become scarce as you ascend towards Ventana Pass, so plan accordingly.

The most famous wildlife attraction is the bear enclosure in Proaza along the Senda del Oso, where you can observe Cantabrian brown bears. Beyond that, as the route traverses the Parque Natural de Las Ubiñas-La Mesa, you might spot various bird species, deer, and other local fauna, especially in the quieter, more remote sections.

While the Senda del Oso itself is very family-friendly and suitable for children, the full 'Ventana Pass and Senda del Oso Loop' is rated as difficult due to its significant elevation gain and challenging sections. This specific loop is generally not recommended for families with young children or beginner riders. Consider riding only the easier, flatter sections of the Senda del Oso if cycling with family.