A rewarding mountain ascent offering sweeping views over Asturias’ green valleys and limestone ridges.
Pico Alto Paso rises as a distinctive summit in eastern Asturias, part of the broader Cantabrian range that forms the backbone of northern Spain. Its slopes transition from dense beech and oak woods at lower elevations to open alpine meadows and rocky outcrops near the top. The reward is wide vistas across the Picos de Europa to the east and the rolling green hills of the Cordillera Cantábrica to the west, with few other visitors on most days.
The most practical approach begins from small villages south of the Caso municipality. Drivers follow the AS-315 road toward the Puerto de Tarna pass before turning onto a narrower paved track that leads to a small parking area near the base. From there, a well-marked path climbs steadily through forest before breaking onto the ridge. Public transport is limited, so most visitors rent a car or arrange a taxi from nearby towns such as Campo de Caso.
Late spring through early autumn offers the most reliable conditions. Snow can linger on the upper slopes into May, while June brings blooming wildflowers in the meadows. July and August provide the longest daylight and driest trails, though afternoon thunderstorms are common. September and early October deliver clear air and fewer people before winter sets in.
Carry layers for rapid weather changes and enough water, as natural sources are seasonal. Sturdy hiking boots are necessary on the loose scree near the summit. A map or GPS track helps on the final ridge where cairns mark the route but can be obscured by fog.
The standard route is a there-and-back hike of moderate difficulty that gains roughly 700 meters of elevation. The lower section winds through mixed woodland where red deer and wild boar tracks are often visible. Higher up, the path opens onto grassy slopes dotted with heather and bilberry bushes. The final push crosses a rocky shoulder to the summit cairn, where the entire valley system spreads out below. Photographers favor the golden light of early morning or late afternoon for the best contrast between meadows and distant peaks.
After descending, many visitors continue to the Puerto de Tarna for panoramic roadside views or drive a short distance to the village of Tarna itself, known for its traditional stone houses and cider houses. Further afield, the Redes Natural Park offers additional walking routes along the Nalón River and around the Embalse de Tanes reservoir. For a contrast to the high ridges, the historic mining town of Sotón de Llanera lies within an hour’s drive and provides insight into Asturias’ industrial heritage.
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The route is moderate for fit walkers but involves steady elevation gain and some rocky sections near the top; it is not suitable for complete beginners or small children.
No services exist above the trailhead. Bring all food, water, and navigation tools; the nearest shops and restaurants are in villages several kilometers away.
Wild camping is generally discouraged in the area. The nearest official campsites are located near the Puerto de Tarna or in the Redes Natural Park.
Snow and ice cover the upper slopes from November through April, requiring crampons and experience; most visitors wait until late spring.
Red deer, chamois, and golden eagles are regularly spotted, especially at dawn or dusk on the higher meadows.
Climb this accessible peak near Aller for sweeping views across Asturias’ high valleys and rugged ridges.
A rewarding climb through oak woods and rocky ridges to panoramic views across western Asturias.
