Back to top

Following part of the Green Route of the Ullibarri - Gamboa reservoir


In the heart of the Llanada Alavesa, not far from Vitoria-Gasteiz, under the watchful eye of Basque mountains such as the Aizkorri and Aratz, is one of the largest reservoirs in the Basque Country. Its construction not only affected the villages of the valley it bathes, but also the fauna and flora of the area. A change that has contributed to creating one of the most important wetlands in the north of the Iberian Peninsula, which we can enjoy today.

Circular route to the Ullíbarri-Gamboa reservoir



The circular route to the Ullíbarri-Gamboa reservoir that we are going to take is 12.8 km long and runs along the southern slope of the reservoir, starting from the information point in the Garaio Provincial Park. There are several itineraries that we can take in the reservoir, as it is bordered by a green route that is divided into 3 circular routes, the one that runs along the northern slope, which is longer and more demanding, the southern route that we are going to take, and the complete route reserved for people who are well prepared physically, all of which are suitable for travelling by mountain bike. The landscape that surrounds us along with the flora and fauna that inhabit this place are the great protagonists of the route, without forgetting of course the villages that make up the region.​

Bird Observatory at the Ullíbarri-Gamboa reservoir

Bird observatories and long walkways will be out in front of us as we walk around the reservoir. Footbridges like the one that allows us to approach the remains of the Azúa church, a footbridge that also marks the point of union of the two circular routes that we can make. Our route takes us into one of the most important wetlands in the Basque Country thanks to the footbridges that run along it, allowing us to contemplate this magnificent natural environment in all its splendour before returning to the Garaio information point, where we will end the route.

More information about the itinerary is available. DO NOT MISS IT...

Footbridge at the Ullíbarri-Gamboa reservoir



The Legend


The Ullíbarri-Gamboa reservoir, or rather its depths, are home to an enigmatic extraterrestrial base. Some years ago, hundreds of people were perplexed to see a UFO flying over the reservoir, surprising those who saw it with its bright colors. This object was clearly visible until at dusk it vanished before the eyes of those who looked at it.



How to get to 




To get to the Garaio Provincial Park where this circular route to the Ullíbarri-Gamboa reservoir runs, we must follow the A-1 until the Argomaniz and Ozazeta exit, the latter being the town we must go to. Shortly after leaving the motorway and just before reaching Maturana, you will find the signposted turnoff that you must take and which will lead you to Gario Park. Once there, we will have several parking areas where we can park our vehicle to start the route.


​Look at the picture of 360º


Double-click on the image to view it full screen


Pet area, hiking with my dog



Given the ecological value of the wetland we are going to visit, it is important to observe the rules that govern it, both with regard to pets and those that affect human behaviour.

Our pet should be tied up when doing this route, a route in which it is important to take water to it since it is not advisable to let it get close to the edge of the reservoir.

There will be many pets that we will find on our way to add to the rich fauna that lives here, so it is important to be aware.





Description of the circular route to the Ullíbarri - Gamboa reservoir


The Garaio Provincial Park information office (0h 00min) is our starting point for this circular tour we are about to begin.

We start the route at the information office of the Garaio Provincial Park

The road that takes us to this natural spot will be in charge of guiding us at the beginning of this route.

We follow the road



There are several parking areas to be found in Garaio, which of course communicate with the road we are following.

We say goodbye to the road

Soon we arrive at the point where we say goodbye to the road, which continues to another of the parking lots, while we begin the journey on a conditioned path.

A perfect path guides us

Already without the heavy company of the asphalt we began to contemplate the first images of the reservoir that we are going to cross partly. Soon we will come across a viewpoint prepared to contemplate the birds that live here.

We arrived at the first catwalk

Our path leads us directly to the first of the footbridges we will cross, at the same time as we are joined by the other path that arrives here from Garaio, skirting the reservoir, from the car parks that we left behind earlier.

We crossed the catwalk

The wobbly footbridge takes us to the other bank where our route continues. At all times the posts along the route inform us of the direction to take, although at the moment we cannot get lost.

We follow the conditioned path at all times

Soon we can see on the other side of the Ullíbarri-Gamboa reservoir the ruins of the old church of Azúa, although we still have a long way to go.

We don't leave the path for now

There are several crossroads that we will find, all of them marked and even fenced to avoid getting lost.

We're going in search of the catwalk



Again in front of us there is a footbridge that will allow us to cross to the other side of the reservoir and that marks the point that divides, or unites, the two circular routes that run through it, the north by Landa and the south that is the one we are following.

We crossed the second footbridge

We crossed the footbridge of Azúa (1h 00min) leaving behind the continuation of the path that we were following and that as we know leads to the Provincial Park of Landa.

We continue to Azúa

On the other side of the reservoir, we will follow the course marked by the bank of the reservoir leaving behind the path that would take us to Nanclares de Gamboa and that would close the north circular route.

We approached the church of Azua

We continue to move forward with our eyes on the battered church of Azua. Almost without realizing it, we left this old church behind us to face a long stretch of path marked out at all times by the inseparable reservoir and the wire fence that delimits it.

The way forward is not lost

Of course we will continue to encounter detours that we must ignore. On more than one occasion we will have to go through some gates, but without abandoning the perfect path that we are following.

We will cross several gates

The fact is that this path and the indications of the route make it quite clear to us which way to go at all times.

The route continues to border the reservoir

As we cross the gates we realize the spectacular scenery we are walking through.

We left behind a new crossroads

A good while later we find a new crossing where we are offered the possibility of joining the GR 25 or Vuelta of the Llanada.

The views are spectacular

We continue to be close to the spectacular Ullíbarri-Gamboa reservoir.

We left the path

After a while our conditioned path seems to come to an end, indicating that the time has come to separate us for a moment from the reservoir.

Touch a stretch of road

We quickly came across a road that we must continue on.

We left the road

Luckily, we will leave it almost at once to go in search of our reservoir. This bad road that we are following leaves us without delay on the same bank of the reservoir.

We have to cross the levee

After passing through yet another gate, we will find ourselves crossing the southern dike of the reservoir, from where we can enjoy magnificent views.

We face a rather tedious stretch

After doing so we will again face a long stretch of dirt track away from the company of the reservoir.

We changed course radically

This track takes us further and further away from it until we find a crossroads where we will change radically our course leaving behind us the dirt track that leads to the Ornithological Park of Mendixur (3h 00min).​

We arrived at another bird observatory

This part of the route takes us through a wide wetland, habitat of countless species as well as the bird observatory we passed by.

We go through the wetland

Soon we will meet in the middle of the wetland following the wooden walkway that runs through it. A stretch that combines footbridges with areas of path and that leads us directly to the end of this route.

We arrived at the first parking lot

An area that is marked by the car park at the entrance to the park.

To follow the road

A heavy section awaits us ahead, following the road into the Garaio Provincial Park. A road that forces us to make a last effort to overcome the unevenness it presents us with.

We're approaching the end of the route

We follow its course leaving aside the detours that lead to the different parking lots of the park. As long as it is clear that our starting point was not one of them.

We arrived at the church of San Estaban

The remains of the old church of San Esteban greet us shortly before we arrive at the information office in the Garaio Provincial Park (3h 40min) where we will end the tour.


This route has been carried out on the ground by SENDITUR on 09-02-2019. The route can vary a lot depending on the time of year, the weather conditions and the terrain, as well as the actions of third parties and the evolution suffered by the natural environment where it is located. SENDITUR is not responsible for any misuse or inadequate use of the comprehensive guides of its routes and/or publications, nor for the variations for the above-mentioned reasons that could exist in their descriptions and recommends that each person be responsible and prudent in the realization of the activity. Likewise, we invite you to get information from books and specialized guides to complement the information described. All times are approximate and are for guidance only. Stops, however small, have not been taken into account. All the information related to the route, texts, images, videos, maps, diagrams, tracks, towns and places of tourist interest are published as a guide and may not coincide with the current state of each place. Before carrying out any activity, value your technical knowledge, your physical form, inform yourself about the meteorology and the variations that the route could have suffered, equip correctly, be prudent and responsible at all times, not surpassing your capacities.

Technical data sheet of the route

Senditur Senderista


Total distance. 12,8 Km


Total time. 3h 40min

This figure varies depending on where we park our vehicle, as most car parks are not very close to the route.


Time of year. Watching the migratory cycle of birds

The Ullíbarri-Gamboa reservoir, its magnificent wetland, the beaches so popular in the summer and the various activities that can be carried out there make it a reference point throughout the year. This privileged environment does not go unnoticed by the different species of birds that choose it as their home or as a stopover during their migrations, thus providing an added value to this recommendable place.


Required equipment. Don't leave the water

The condition and civilization of the route should not make us fall into the error of underestimating it. We are facing a route of considerable distance in which we will not have sources or rest areas outside the tourist points. Therefore we can not lack water and food, adapt our equipment to the period of the year in which we are and of course not venture with street clothes and shoes. The walking sticks, even if they do not stand out due to the slopes to be overcome, will also be of help to us. Consult our list of material and equipment for hiking. Read more.




Slope acumulate. 110 m   Slope positive. 55 m   Slope negative.. 55 m


Difficulty. Medium



The distance is undoubtedly the factor that conditions most of the difficulty of this circular route. Even though there is practically no unevenness, we are facing a route of more than 10 km that forces us to be used to walking in order not to have a bad time.


Severity of the environment

As long as we don't go off the beaten track and keep our common sense when passing through the different footbridges on the route, we shouldn't have any problem. We must take into account that in some areas of the route we will coincide with road traffic so we must take extreme precautions.



Perfectly signposted at all times and even enclosed by a fence along much of the route, this section should not generate more complications than leaving the car park where we park and find the route we are going to follow.


Important places to pass through

1-Garaio Information Point 0h 00min 560 m 0 Km 30T 537695 4750820
2-Azúa Footbridge 1h 00min 555 m 3,6 Km 30T 535932 4751275
3-Diversion to Mendixur Ornithological Park 3h 00min 553 m 10,5 Km 30T 537887 4749142
4-Garaio Information Point 3h 40min 560 m 12,8 Km 30T 537695 4750820

Coordinates UTM Datum WGS84


Profile of the route

Profile of the circular route to the Ullíbarri-Gamboa reservoir


Cartography, maps and tracks

Map of the circular route to the Ullíbarri-Gamboa reservoir

This sketch of the route is not made to scale nor does it contain all the information relating to the area, it is merely indicative.

Topographical map of the circular route to the Ullíbarri-Gamboa reservoir



This schematic with the path is approximate and has been created from the derived cartographic base © Instituto Geográfico Nacional  "Cuadrante 112-2, 112-4, 113-1 y 113-3, 25.000"


Senditur has manipulated the tracks to correct the aberrant points that may exist, caused by problems with the reception of the GPS signal. In any case the tracks are always approximate.


Find out what's around you with Senditur's APP available for:




SENDITUR encourages you to use the new technologies within your reach, using them as support and consultation in your activity, not basing the realization and orientation of the same only and exclusively on them, since they may see their functioning altered by very diverse causes, not functioning correctly and their indications may not be precise. SENDITUR is not responsible for any misuse and/or operation of its electronic guides and recommends that everyone be responsible and prudent in carrying out the activity. All opinions, advice and/or assessments made by SENDITUR in its descriptions are subject to and/or refer to the specific conditions that SENDITUR encountered on the specific day of the performance of the tour, referring to that specific day and always taking as reference trained and experienced people, with a high level of both physical and technical preparation, as well as correctly equipped, therefore all opinions, assessments and/or advice are for guidance only. From the commitment of SENDITUR with Nature and the respect to the balance of the environment, SENDITUR urges you to travel in a responsible way, with low environmental impact and respecting at all times the Natural, Cultural and Social environment wherever you go.

Azúa at the Ullíbarri-Gamboa reservoir
Azúa footbridge at the Ullíbarri-Gamboa reservoir
Church of San Esteban
Storks in St. Stephens Church
The Gorbeia from the Ullíbarri-Gamboa reservoir
Share your experience

Maximum size 2MB

*.gpx, *.kmz, *.kml, *.plt

Listado de experiencias
Natalia Cruz
Created the 13-10-2019

Una bonita ruta cerca de Vitoria. Un paseo muy recomendable.

Sanctuary of Our Lady of Estíbaliz
Argandoña, Álava - Araba
Sanctuary of Our Lady of Estíbaliz

Home of the Patron Saint of Alava, a jewel of Alava's Romanesque style.

Sanctuary of Our Lady of Arantzazu
Oñati, Guipúzcoa - Gipuzkoa
Sanctuary of Our Lady of Arantzazu
Dolmen of Sorginetxe and Dolmen of Aizkomendi
Arrizala, Álava - Araba
Dolmen of Sorginetxe and Dolmen of Aizkomendi
Otzarreta Beech Forest
Zeanuri, Vizcaya - Bizkaia
Otzarreta Beech Forest
Gorbea Natural Park
Areatza, Vizcaya - Bizkaia
Gorbea Natural Park

The largest Natural Park in the País Vasco

Sanctuary of Our Lady of the Holm oak
Artziniega, Álava - Araba
Sanctuary of Our Lady of the Holm oak
See restaurants in Agurain-Salvatierra
Agurain-Salvatierra, Álava - Araba
See restaurants in Agurain-Salvatierra

Agurain-Salvatierra, Álava - Araba

See restaurants in Legutio
Legutio, Álava - Araba
See restaurants in Legutio

Legutio, Álava - Araba

See accommodation in Agurain-Salvatierra
Agurain-Salvatierra, Álava - Araba
See accommodation in Agurain-Salvatierra

Agurain-Salvatierra, Álava - Araba

See accommodation in Legutio
Legutio, Álava - Araba
See accommodation in Legutio

Legutio, Álava - Araba

See things to do in Legutio
Legutio, Álava - Araba
See things to do in Legutio

Legutio, Álava - Araba


¿Did you know that...


The Ullíbarri-Gamboa reservoir is the largest in the whole of the Basque Country. Its construction lasted 10 years and 12 of the valley's villages were submerged under its waters. Its first function was to supply electricity to the Blast Furnaces of Bizkaia; furthermore, this reservoir is connected by an underground gallery to the nearby Urrunaga reservoir.


Don't miss out...


The nearby Mendixur Ornithological Park, a wetland of great importance and a must for nature lovers and birdwatchers.  Through its different routes and observatories we will be able to discover the more than 200 species of birds that throughout the year inhabit it.



Go to 8 Hiking Routes to do with children in Alava

ico punto DON'T BE IN DOUBT


You will also be able to discover what surrounds you, the localities, the places of interest or the fountains, the rest areas and much more.




Available information:

Discover what surrounds you



Learn more about the app. Click here


We would be grateful if you could write to us to inform us of any erroneous, out-of-date information or errors in the translation you have found, or simply to send us your opinion at Thank you very much.




Respect the Path Keep it clean



Continue watching …

Copyright © 2021 SENDITUR