Puerto de La Sía - Arredondo (Cantabria)

Start Town Altitude (m) Elevation Gain (m) Length (km) Gradient (%) Difficulty Rating
Arredondo 1250 1089 20.6 5.3 644 ****

Puerto de La Sía - Arredondo
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Roads & Traffic

The road is in good condition.

There is very little traffic on this climb.

Climb Description

Puerto de la Sia

Puerto de La Sía is an excellent climb in the heart of the Collados de Asón Natural Park. It is essentially two climbs in one, with the road first cresting the Collado de Asón before continuing the climb to the border between Cantabria and Castilla-y-León.

Rather unusually, the better scenery is found on the lower slopes, particularly during the hairpins shortly before the Collado de Asón, which offer really stunning views along the valley. The upper slopes are largely shrouded in trees, with only occasional glimpses of the beautiful green countryside.

The Puerto de la Sía does close at times during winter due to snow; although the closures tend to be sporadic rather than long term. The climb is open as far as the Collado de Asón throughout the year.

Other sides

Puerto de la Sía can also be climbed from the south, starting in the village of Espinosa.

Nearby Climbs

Peña Cabarga
Collado Espina
Picon del Fraile
El Caracol


We don't currently run any tours including this climb. If you would be interested in customizing an itinerary to include this climb, please contact us.