Canyons around Quirós, a municipality in Asturias, are part of the Valles del Oso region, known for active tourism. The area features mountainous terrain, dense forests, and clear waters, providing a setting for aquatic activities like canyoning. Canyons in this region are generally considered of medium difficulty, suitable for those with some prior experience. Quirós serves as a gateway to these diverse canyoning opportunities.
Last updated: June 20, 2026
Highlight (Segment) • Gorge
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Highlight (Segment) • Trail
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This trail is very easy to walk, as it's mostly shaded. However, you should still wear good, sturdy shoes.
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Before renting a bike from the "Oso goloso" rental shop in Proaza, you should know the following: the gearshift on the mountain bikes (without mudguards, bell, or luggage rack) is absurdly intentionally locked so that, out of a hypothetical 18 gears, you can only use 4 in the middle range (so the chain doesn't come off, hahaha). After you pay and sign, they'll explain this to you. However, this is completely unsuitable for riding the Bear Trail, especially the rather steep eastern variant with its very poor surface. Even with good fitness, you'll often have to dismount. Apparently, there's another rental shop in Proaza...
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The "Xanas," after whom the gorge is named, are Asturian mountain stream nymphs who enchant shepherds on St. John's Eve. The path was created in the 1930s as preparatory work for a planned road from Villanueva to Pedroveya, which ultimately never came to fruition.
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The Teverga Gorges are an impressive part of the Senda del Oso, a very popular hiking and cycling route in Asturias. This trail follows the route of an old mining railway and crosses the Valles del Oso, which include the municipalities of Quirós, Santo Adriano, Proaza and Teverga.
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In Santa Marina there are some steps that connect with the section of the Senda del Oso in the municipality of Quirós, perfectly conditioned in the valley of the river Trubia. In autumn the trees are colourful and the warm lights of the most suggestive season of the year envelop the landscapes in a very seductive luminous effervescence. Bárzana is the capital of the municipality of Quirós, it is on the other side of the river, like many villages along the route. The route of the old mining train runs solitary and hidden to the Valdemurio reservoir, a reserve for aquatic birds and an active leisure centre. The Senda crosses the Cuevafurada gorge through an illuminated tunnel and reaches the Caranga de Abajo detour. The Teverga branch deviates to the left, this is the path we will take later on the return from Tuñón. The route continues straight ahead through the tunnels of the Peñas Juntas and Peña Caranga Gorges to the Proaza valley, where the Bear Enclosure is located. At times you can see bears that live in semi-freedom and come to the Senda Enclosure to eat. The cycle route continues through Villanueva and ends at the Tuñón Recreational Area, set up at the Esgarrada bridge. There is a fountain, benches, a children's playground and a bear sculpture. The route returns along the same path to the Caranga de Abajo turn-off and continues through the Teverga valley. On the way back you can take advantage of the opportunity to visit the town of Proaza, connecting again with the Senda at the bridge of the Hydraulic Power Station. The Bear Enclosure is still beautiful, wooded and comfortable for cycling, small villages appear, well-lit tunnels and after several curves the canyon opens up and the houses of Entragu emerge between the trees. The stage continues for a couple of kilometres to San Martín de Teverga, an important crossroads and town with all services.
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This cycle path is part of Spain's greenways, which restore old abandoned railways. The route passes through tunnels, bridges and breathtaking canyons!
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The canyons around Quirós, such as the Route of the Xanas, are renowned for their dramatic natural landscapes. They feature deep, narrow gorges carved by streams, with paths often excavated directly into the rock face, offering spectacular views and a sense of adventure. The region is also part of the Valles del Oso, known for its mountainous terrain, dense forests, and clear waters.
You can expect to see impressive limestone walls, some reaching depths of up to 100 meters, and unique rock formations. The gorges support rich biodiversity, including abundant flora like hazelnut, ash, linden, maple, oak, strawberry trees, and yews. Fauna such as otters, Iberian desmans, foxes, wild boars, and birds like golden eagles and Egyptian vultures can also be found.
Yes, the Ruta de las Xanas is a popular and relatively low-difficulty trail, making it suitable for families. However, caution is advised in narrower sections with significant drops. The circular route typically takes between 3 to 5 hours to complete.
The gorges around Quirós are generally considered of medium difficulty, suitable for those with some prior experience in outdoor activities. Trails like the Route of the Xanas and the Desfiladero de Peñas Juntas are rated as intermediate, offering a balance of challenge and accessibility.
While many outdoor areas in Asturias are dog-friendly, specific regulations can vary. For the Ruta de las Xanas, it's generally permissible to bring dogs, but they should be kept on a leash, especially in narrow sections or when encountering other hikers. For the Desfiladero de Peñas Juntas, which is part of the Senda del Oso, dogs are also usually allowed on a leash.
The region around Quirós offers canyons that are generally considered of medium difficulty, suitable for those with some prior experience in aquatic activities. While not explicitly detailed for advanced technical canyoning, the area's natural formations, including waterfalls and natural slides, provide opportunities for exploration that incorporate elements of canyoning. Permits for canyoneering in Asturias may be required for certain routes; it's advisable to check with local authorities or specialized guides.
Beyond exploring the gorges, Quirós is excellent for various outdoor activities. You can find numerous hiking trails, including the challenging Peña Rueda Circular Trail or the easier Senda del Oso: Valdemurio Reservoir Loop. Cycling is also popular, especially on the Senda del Oso, a greenway built on a former mining railway. For road cyclists, there are challenging routes like the San Lorenzo, Somiedo, and Ventana Passes Loop. Running trails, such as the Valdemurio Reservoir Bear's Path Loop, are also available.
Yes, the Ruta de las Xanas is commonly done as a circular route. It typically starts at the recreational area of El Molín de Las Xanas in Santo Adriano, passes through the gorge, and often involves a return path through Pedroveya, Quirós, completing a loop.
The best time to visit the canyons and gorges in Quirós for hiking and outdoor activities is generally during spring (April to June) and autumn (September to October). During these seasons, the weather is typically mild, and the natural scenery is at its most vibrant, with lush greenery in spring and colorful foliage in autumn. Summer can also be pleasant, but trails might be busier, and temperatures higher. Winter can bring colder weather and potentially snow at higher elevations, making some routes more challenging.
For the Ruta de las Xanas, parking is typically available at the recreational area of El Molín de Las Xanas in Santo Adriano, which serves as a common starting point for the trail. For the Desfiladero de Peñas Juntas, which is part of the Senda del Oso, you can find parking in nearby towns like Proaza or Tuñón, where access points to the Senda del Oso are located.
Yes, you can find cafes and restaurants in the villages surrounding the gorges. For the Ruta de las Xanas, there are options in Santo Adriano and Pedroveya. Along the Senda del Oso, which includes the Desfiladero de Peñas Juntas, several establishments cater to visitors in towns like Proaza and Tuñón, offering local Asturian cuisine and refreshments.


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