[1/3] Ruta del Cares. With a fresh overnight dusting of snow on the peaks we set out to hike an out-&-back section of the 12km point-to-point Ruta del Cares (PR-PNPE 3) trail in Parque Nacional de los Picos de Europa. This is the park’s most popular hike, linking Poncebos (Asturias) & Caín (León); it’s considered one of Spain’s most beautiful trails. We 🅿️ at Poncebos & initial views of the clear-flowing Río Cares from near the trailhead looked promising (📷1); a short stretch of road led to a well-formed path. The trail climbs through a deep limestone gorge with sheer cliffs that tower above the river; erosion has created rock pillars (📷2) & natural arches (📷3)—but human engineering in this landscape also must be admired. Between 1915 & the early 1920s, the company Electra de Viesgo built a canal to carry water from the Río Cares at Caín to a hydroelectric plant at Camarmeña–Poncebos. Up to 11 km long, it runs through ~70 tunnels excavated largely by hand with the aid of explosives; 11 workers were killed during construction. The maintenance path for this canal, widened between 1945–50, became today’s Ruta del Cares: the canal still carries water alongside, above & beneath the trail (📷4).

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