Why Los Sierros Altos Rewards Visitors
Los Sierros Altos rises as a broad granite shoulder above the Nalón valley, offering hikers a rare combination of accessible ridge walking and far-reaching panoramas across the Cantabrian Mountains. Unlike the crowded limestone massifs farther east, this summit delivers solitude, springy heather underfoot, and the constant sound of wind through scattered oak and beech woods.
How to Reach the Trailhead
Most walkers start from the village of Campo de Caso, where a narrow paved road climbs steadily toward the Collado de la Farrapona. From there a clear track continues on foot to the base of the ridge. Those arriving by public transport can take the bus from Oviedo to Campo de Caso and then a local taxi the final few kilometres; the journey from the regional capital takes roughly ninety minutes.
Best Time to Visit
Late spring and early autumn provide the most stable conditions. Snow can linger on the north-facing slopes into May, while July and August bring comfortable temperatures at altitude and long daylight hours. October often rewards with clear air and the first golden tones in the beech forests below the ridge.
Routes and What to Expect on the Mountain
The main path follows the broad east–west ridge for approximately four kilometres, passing minor summits before reaching the highest point. The terrain is mostly grass and rock with occasional short scrambles; no technical equipment is required in dry weather. On clear days the view extends north toward the Bay of Biscay and south across the high plateaus of León. In early summer the slopes are dotted with gentians and the calls of choughs and griffon vultures overhead.
Nearby Attractions Worth Combining
After descending, many visitors continue to the nearby Lago de Covadonga or the traditional villages of the Redes Natural Park, where cider houses serve local cheese and fabada. The medieval bridge at Cangas de Onís and the prehistoric cave art at Tito Bustillo lie within an easy drive, allowing a varied day that mixes mountain walking with cultural stops.
Practical Considerations for a Safe Visit
The ridge is exposed; sudden fog or wind can reduce visibility quickly even when the valley remains sunny. Carry layers, a map, and sufficient water. Mobile coverage is patchy above the treeline, so inform someone of your route and expected return time.
