Puerto de la Sía (Arredondo)

Start Town Altitude Elevation Gain Length Gradient Difficulty Rating
Arredondo 1,250m 1,089m 20.6 km 6.4% 644 ****

Puerto de la Sía  - Arredondo - Cycling Profile

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Climb Description

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.

Puerto de la Sía from Arredondo - Cantabria Cycling Climb

This is a very quiet and enjoyable climb

Roads & Traffic

The road is in good condition and there is little traffic throughout the climb.

Alternative Routes

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

Cycling Holidays

We don't currently run any tours in this part of Cantabria. If you would be interested in customizing an itinerary to this region, please contact us and we would be happy to discuss the options.

You may also be interested in the links below to some of the holidays that we currently run nearby in Northern Spain.

Picos de Europa National Park
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Self-Guided Cycling Holiday
Length: 8 Days
Level: Difficulty Medium to Challenging
Price: from €1,490 EUR
Basque Mountains
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Self-Guided Cycling Holiday
Length: 7 Days
Level: Difficulty Easy to Medium
Price: from €1,480 EUR
Lagos de Covadonga
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Self-Guided Cycling Holiday
Length: 8 Days
Level: Difficulty Challenging-Hard
Price: from €1,490 EUR