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La Cubilla is an absolute jewel, and despite the billions of flies and potholes, itâs a magnificent ride that you must do when youâre in the neighbourhood.
Route
This out-and-back route from Mieres, or any other town south of Oviedo, offers a long, steady ascent into the Cordillera CantĂĄbrica, with hairpins for days, dramatic limestone cliffs, and views that seem to go on forever.
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The adventure begins in Mieres, a town in the steep valley towards LĂ©on. Youâll roll out gently through the valley, riding parallel to the railway line and the highway, and following the Valle de Lena toward the mountains. Truth be told, the first part of this ride isnât quite enjoyable. Luckily, it doesnât take long before you spot the ridges in the distance, and realize youâre headed way up there.

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Once you ride under the bridge, the road starts going up, and it just keeps going. Youâre looking at 20 km of climbing, gaining around 1,300 meters of elevation, with an average gradient of just 5%. Itâs long and tough, but it never gets brutal as its neighbouring climbs such as the fearsome Alto el Angliru.
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The road is newly resurfaced (thanks to the passage of La Vuelta in 2019), and yet itâs in an appalling state. The road is littered with deep potholes, so keep your wits about you. Fortunately, itâs largely free of traffic.
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What really sets this climb apart is its setting: the higher you go, the more youâre enveloped by jagged peaks, alpine meadows, and dramatic ravines. Also, cows (and cow dung!) may block the road near the summit. The final stretch is above the tree line, winding through a valley that indeed feels like something out of the Alps.
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The summit is a peaceful, almost surreal place. La Cubilla tops out at 1,683 meters, right near the border with LeĂłn. Thereâs no cafĂ©, no monument, no ski resortn no nothing: just silence and the vastness of the mountains. Bring a snack, snap your summit selfie, and soak in the raw beauty before turning around and heading back the way you came.
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What goes up must come down, and the return to Mieres is one long, glorious descent. Just donât forget to look up once in a while; the reverse views are just as stunning.
Fueling up
Through the valley are some smaller villages where you can fill your bottles and have a coffee. Little to no possibilities as you get closer to the climb.