Your search engine for activities and online reservations

Taking a trip in the Geopark of the Basque Coast and watching the flysch on a boat from Zumaia, is a privilege that not many coasts in teh world can offer. A flysch is a geological formation which reveals the history of the Earth’s crust. Although flysch exists elsewhere, it is precisely here where the most relevant findings have been made.

On local cliffs, the flysch, consisting of layers of different sedimentation, of softer and more porous materials or harder and more massive, rose up as a consequence of a tectonic movement. As the sedimented seabed rose up, it left the dramatic history of the Earth’s crust in vertical exposure.

In the Basque Coast, if you visit the flysch from on a boat from Zumaia, Deba or Mutriku, you will have the one-off opportunity to see this open book of sedimentation lines telling fifty million years of history of our planet. From the sea you will be able to appreciate how the flysch enters the waters for more than five kilometers

If you’d like to watch this panorama from the height of the cliffs, you may combine your boat trip with a tour hiking through the flysch and gaze at it from strategical highlights like such as the Algorri or San Telmo hermitage.

This coast, in addition to its importance in the study of science, is of unequaled beauty. It has been chosen as the setting for many international films such as Game of Thrones, The Invisible Line, 8 Basque Surnames, and many other productions that have been shot in this wonderful setting.

Description of the activity

We are going to leave from the Txomin Agirre dock in Zumaia. There are two kinds of boats for the trip, bigger or smaller and they will be chosen according to the number of passengers and interest of the hikers. We go down the river, Urola, to the sea and begin to skirt the cliff coast in westerly direction, towards Deba and Mutriku.

A specialized guide will translate the meaning of these lines, the fossils which exist in them , the climatic changes that affected the planet, the extinction of the dinosaurs. Each layer represents about ten thousand years. The hard layers correspond to cold periods and the soft layers to warm periods.

The explanations are adapted to the different groups levels. In the case of schoolchildren, the contents are coordinated with the scientific units of each school year that we could observe in the flysch, aiming to help them in their learning development.

Watching the flysch by boat is a spectacle you cannot imagine, a masterpiece of nature and time. Don’t miss it!

Share it with your friends
Things you should know

Big boat: all along the year.
Small boat: from October to May.


1 or 2 hours.

Min & Max persons:

Big boat: maximum 39 persons.
Small boat: maximum 10 persons.


Insurances included in the price.


Persons who become sick when travelling by boat, eat light before the activity.


Members of the Ecotourism Association.
Founders of "The Flysch Route".
Winners of the Basque Government Tourism Award 2010.
Official guides of the Basque Coast Geopark.
20 years of experience.


Submit a rating

Your email address will not be published.