5.0
(3)
82
hikers
8
hikes
Mountaineering in Ukerdiko Erreserba Integrala/Reserva Integral De Ukerdi offers challenging routes within a rugged subalpine environment in the Western Pyrenees. The region is characterized by its accidented topography, rocky slopes, and distinctive black pine skeletons. High peaks, including Ukerdi (2252 m), provide expansive views of the surrounding mountainous landscape. This area is known for its demanding terrain, requiring a high level of fitness and alpine experience.
Last updated: July 12, 2026
5.0
(1)
19
hikers
Hard mountaineering route. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
5.0
(1)
17
hikers
Hard mountaineering route. Very good fitness required. Mostly accessible paths. Sure-footedness required.

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10
hikers
13.4km
05:32
750m
750m
Hard mountaineering route. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
4
hikers
12.6km
05:30
990m
990m
Hard mountaineering route. Very good fitness required. Mostly accessible paths. Sure-footedness required.
8
hikers
14.1km
05:35
910m
910m
Hard mountaineering route. Very good fitness required. Mostly accessible paths. Sure-footedness required.
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After breakfast, it closes for a while for cleaning. Fill up your water bottle before heading up, as it's a scarce resource up there.
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There is no ibon, it doesn't match the photos. It's just a pond for the animals to drink from.
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A fairly difficult hike when you're not trained (which was my case) but not impossible if you take your time and go at your own pace. On the other hand, it's a very beautiful hike! The landscapes are magnificent. There are two parking lots, the Masousa parking lot and another higher up which saves 45 minutes, but the road is very bumpy.
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If you arrive early you can have minutes of silence
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The mountain route to reach the balconies of Lakartxela leaves from the site of the old Venta de Arrako, near the dolmen and the hermitage of Nuestra Señora de Arrako, a simple sanctuary on the Belagua plain at the foot of the splendid mountains of the Roncal Pyrenees. . The path follows the red and white markings of the long-distance path until Venta de Juan Pito, at the first fork of the road that goes up to the popular port of Piedra de San Martín. The path is clear in the beech forest, it goes up the slope of the mountain to the Arrakogoiti pass and connects with the GR-12, a spectacular crossroads of paths and landscapes on the line of the French slope. An option for summit collectors is to climb the nearby Bimbaleta (1,757 m) via the Portillo de Bimbaleta. The mountain trail follows the hiking marks on the southern slope of Bimbaleta to Portillo Kartxela and begins the path that goes up to the Lakartxela ridge. The first ramp is a wall of impressive green steps. The milestones mark the most comfortable steps and facilitate access to Keleta (1,904 m), the first peak of the rope, and continue to the main summit of Lakartxela (1,989 m), with a very hospitable mailbox at the top.
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Exceptional spot. To fully enjoy it, sunrise or sunset are preferred.
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The peak of Arlas forms a beautiful, incisive tooth, which stands out particularly well in the surrounding panoramas. On this point, you are ideally placed to admire his profile. The peak rises to an altitude of 2,044 meters and is located between Navarre in Spain and the Pyrénées-Atlantiques in France.
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Mountaineering in Ukerdiko Erreserba Integrala/Reserva Integral De Ukerdi is generally suited for experienced individuals. The routes are described as hard mountaineering routes, demanding a high level of fitness, sure-footedness, sturdy footwear, and prior alpine experience. Many routes involve significant elevation gains and cover considerable distances, often taking 6-7 hours or more to complete.
The routes within Ukerdiko Erreserba Integrala/Reserva Integral De Ukerdi are primarily challenging and designed for experienced mountaineers. The terrain is rugged and subalpine, making it less suitable for casual family outings or beginners. There are no routes specifically categorized as easy or moderate in this guide, indicating that the area is best for those with alpine experience.
The rocky slopes of Ukerdi are home to sarrios, also known as chamois. These agile mountain goats are often seen navigating the terrain and are a notable part of the area's wildlife. Keep an eye out for them as you traverse the higher elevations.
While specific seasons aren't detailed, the challenging nature of the routes and the subalpine environment suggest that late spring, summer, and early autumn would be the most favorable times. Winter mountaineering would require specialized equipment and expertise due to snow, ice, and potentially harsh conditions. Always check local weather and trail conditions before heading out.
Yes, several circular routes are available for mountaineers. For example, you can explore the Collado de Linza loop from Cocina libre Linza, which is a 10.5-mile (16.9 km) trail. Another option is the Pic d'Arlas – Anie Peak loop from Gouffre de la Pierre-Saint-Martin (Puits Lépineux), offering panoramic vistas.
The reserve is known for its distinctive black pine skeletons, which add a dramatic character to the scenery. The broader Larra-Aztaparreta region, where Ukerdi is located, features spectacular karst phenomena, including caves and ravines. Near the Ukerdi summit, you can find the entrance to 'iluminako ateak' (BU-56), cited as one of the world's deepest caves.
Ascending to peaks like Ukerdi (2252 m) offers expansive and truly rewarding views of the surrounding mountainous landscape. The rugged topography of the Western Pyrenees provides stunning panoramic vistas, making the challenging ascents worthwhile.
Given the demanding nature of the routes, it is highly recommended to carry a navigation device. Additionally, sturdy footwear, appropriate alpine clothing, and gear suitable for significant elevation gains and potentially exposed terrain are essential. Prior alpine experience is also crucial for safe navigation.
Ukerdiko Erreserba Integrala/Reserva Integral De Ukerdi is a protected area. While general access for mountaineering is permitted, it's always advisable to check for any specific regulations or restrictions that might apply, especially concerning sensitive areas or seasonal closures. There is no indication of a general permit requirement for hiking, but respecting the natural environment is paramount.
Many challenging routes, such as the Pic d'Ansabère / Petrechema – Collado de Linza loop and the Acherito – Paso del Caballo loop, start from areas like Cocina libre Linza. Another starting point is Gouffre de la Pierre-Saint-Martin (Puits Lépineux) for routes like the Pic d'Arlas – Anie Peak loop. These locations typically offer parking facilities for mountaineers.
The area is highly rated by the komoot community, with an average score of 5.0 stars. Reviewers often praise the challenging terrain, the stunning panoramic views from the peaks, and the rugged, untouched subalpine environment that defines the Western Pyrenees.


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