Alto Bernesga and Los Argüellos Biospheres Loop

This challenging racebike route is approximately 106 km long with significant elevation gain. It typically takes around 5 hours and 20 minutes to complete, though this can vary based on your fitness level and pace.

This route is classified as difficult for racebiking. It involves substantial ascents and descents, requiring very good fitness due to the mountainous terrain of the Reserva de la Biosfera de Los Argüellos.

The route is a circular one, starting and ending in Villamanín. This allows for convenient access and return to your starting point.

You can expect mostly paved surfaces, typical for road cycling, though some sections might be less maintained. The terrain is characterized by the Cantabrian mountain ecosystem, featuring karstic landscapes, high mountain pastures, and rocky areas, which contribute to the significant elevation changes.

The route offers breathtaking scenery within the UNESCO Biosphere Reserve. Key points of interest include the picturesque Embalse de Casares (Casares Reservoir), and you'll pass through Villamanín. You might also see the Plaza Mayor of Villamanín, the Church of Ciñera, and the Curueño Gorge and Valdepiélago Bridges.

The Biosphere Reserve is rich in biodiversity. Keen observers might spot Cantabrian brown bears, wolves, otters, wildcats, chamois, golden eagles, griffon vultures, and falcons, among other species.

The best time for road cycling in the Reserva de la Biosfera de Los Argüellos is generally during the spring and autumn months when temperatures are milder and the weather is more stable. Summer can also be suitable, but be prepared for potentially higher temperatures, especially in the valleys.

No specific permits or entrance fees are generally required for cycling on public roads within the Reserva de la Biosfera de Los Argüellos. However, always respect local regulations and protected areas.

This route is designed for racebiking on roads, which is generally not suitable for cycling with dogs, especially given the distance and difficulty. If you wish to bring a dog, consider shorter, dedicated walking or mountain biking trails where dogs are permitted and can safely accompany you.

Villamanín serves as the starting and ending point for this circular route. You should be able to find parking options within the town, particularly near the Plaza Mayor of Villamanín or other public areas, though specific cyclist parking facilities may vary.

Yes, sections of this route intersect with other official trails. You will briefly pass through parts of the Camino Olvidado (Puente Almuhey-La Robla), Ruta de las Cuencas Mineras del Carbón, Vía Verde Mina Bardaya, Camino del Salvador, and Vía de la Plata.