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The Top 12 Lakes in Biscay

Looking to visit the best lakes in Biscay? After all, there’s nothing better than the serenity of the lakeshore — or a quick dip when the weather’s warm. So, browse our list of Biscay’s top lakes below as recommended by the komoot community, and experience more on your next adventure!

Last updated: October 21, 2025

Doña Casilda Iturrizar Park

Highlight • Natural

The Parque de Doña Casilda is the most famous park in Bilbao. The park is also called parque Casilda Iturrizar, named after the benefactor who donated this park to Bilbao. …

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Txatxarramendi Island

Highlight • Natural

Urdaibai is an extraordinarily beautiful and varied natural space, which is why it was declared a Biosphere Reserve by UNESCO in 1984.
Its heart is the Oka River that rises …

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Pozo Hostión

Highlight • Lake

The largest of the three wells. Its name comes from a Euskaldun foreman who did not speak Spanish well and who always said "I give hostión" to threaten miners who did not work well.

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Aixola Reservoir

Highlight • Lake

The Aixola reservoir is located between the provinces of Vizcaya and Guipúzcoa. It is surrounded by a beautiful landscape made up of shady pine, oak and beech forests.

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Gorostiza Reservoir

Highlight • Lake

Beautiful circular walk to the Regato.

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Lakes of the Old Iron Mines

Highlight • Lake

There are sections of trail with possible mud

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Reservoir Riverside Walk

Highlight (Segment) • Trail

A panoramic walk along the banks of the reservoir. Mainly in the shade of native trees, just listen to the birds singing.

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Ariola Lake Trail

Highlight • Trail

This wonderful trail that goes around the lake is a great place to enjoy the shade, watch birds and look at the flowers.

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Parkotxa Pond

Highlight • Lake

At the end of the 19th century, explosives began to be used for open-pit mining of iron ore. Due to this, in some areas the water table was reached and …

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Kurtzeta Reservoir

Highlight • Lake

Nice walk around the Kurtzeta reservoir. Cross the dam and don't forget to look out and enjoy the incredible views of Ganekogorta and Biderdi peaks, especially after the early season fresh snow cover.

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Didn’t find what you were looking for?

Find the best lakes in Biscay per region:

Gran Bilbao

Explore more

Still not found your perfect lake in Biscay? Check out the guides of these regions to see even more beautiful places.

Álava Gipuzkoa Zierbena

The Top 12 Lakes in Biscay

Doña Casilda Iturrizar Park

Txatxarramendi Island

Pozo Hostión

Aixola Reservoir

Gorostiza Reservoir

Lakes of the Old Iron Mines

Reservoir Riverside Walk

Ariola Lake Trail

Parkotxa Pond

Kurtzeta Reservoir

Other adventures in Biscay

Most popular routes in Biscay

Most popular attractions in Biscay

Get inspired with the komoot mobile app

Didn’t find what you were looking for?

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