4.6
(890)
8,293
hikers
12
hikes
Bus station hiking trails in Larrako Erreserba Naturala/Reserva Natural De Larra navigate a landscape dominated by the Larra karst massif, a geological formation characterized by fractured terrain, crests, and depressions. The region features numerous peaks, with the highest point being Hiru Erregeen Mahaia / Mesa de los Tres Reyes at 2,448 meters. Diverse ecosystems range from black pine forests in upper regions to beech and fir tree forests in lower ravines. The terrain is shaped by limestone and offers varied…
Last updated: May 13, 2026
4.6
(16)
201
hikers
16.0km
06:22
890m
890m
Hard hike. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
4.7
(10)
67
hikers
Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

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4.5
(8)
50
hikers
11.9km
04:20
570m
560m
Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
5.0
(2)
19
hikers
20.1km
08:25
1,250m
1,250m
Hard hike. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
5.0
(1)
9
hikers
26.4km
10:25
1,240m
1,240m
Hard hike. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
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The refuge is located at an altitude of 1,670 meters on a rocky peak. It promises an exceptional 360° panorama of the many peaks. The beds are distributed in rooms ranging from 2 to 4 beds. The refuge also offers good hot meals in the evening and breakfast before setting off on the trails.
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Without a doubt, the Col de la Piedra de Saint Martin or Pierre Saint-Martin is one of the Top 10 in the whole of the Pyrenees. Without exceeding 2000 metres of altitude, it is a very long pass, with a lot of accumulated gradient (due to the innumerable French slopes, the gradient is 1,450 metres), with very hard slopes and several kilometres above 10%, with wonderful landscapes and panoramic views and with little traffic, except for the slopes crossed by the main road (D132 in France, the NA 137 in Spain). It is a pass with many slopes; in Europe there are few other passes that have as many slopes as this one (col de Turini, Passo delle Erbe, would be comparable in number of slopes approximately). I have only climbed it by 2 slopes: (i) my first time was from Lourdios Ichère, crossing the col de Labays and the col de Soudet. Simply spectacular; (ii) I have subsequently climbed the Spanish side on several occasions, which is unique, and which starts from Belagua and crosses the Belagua cross-country ski resort to reach the mountain pass. It is also very beautiful, with a landscape and views different from the north-east side. If I had to choose one of the two, I liked the north-west side better because it is more remote, harder and in my opinion more authentic. It is also a culturally special mountain pass because the Tribute of the 3 cows takes place on its summit every 13th of July, which is considered the oldest treaty in force in Europe. So... you know... you cannot miss the opportunity to come here and enjoy this wonderful jewel of the Pyrenees!!!!
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If you arrive early you can have minutes of silence
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Exceptional spot. To fully enjoy it, sunrise or sunset are preferred.
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Pleasant cabin and well located for getting to Pic d'Anie in the early morning. During my visit (10/2023) only the SAS entrance to the cabin was accessible. The other 2 rooms were locked. Presence of a water point just a few meters from the cabin (be careful of the noise generated if you spend the night there).
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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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This mountain pass is on the Franco-Spanish border. It is overlooked by the peak of Arlas which rises to 2,044 meters. From the pass, you can admire the valleys of Roncal in Spain and Haute-Soule in France.
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There are 12 hiking trails in Larrako Erreserba Naturala/Reserva Natural De Larra that are accessible from bus stations. These routes offer a range of experiences, from moderate to difficult.
The region is dominated by the spectacular Larra karst massif, so you can expect a dramatic, fractured, and labyrinthine landscape with distinctive exokarstic forms. Many trails also lead through diverse ecosystems, including concentrations of black pines in higher regions and beautiful beech and fir tree forests in lower areas like the Aztaparreta Ravine.
Many trails offer stunning views of the Pyrenees. You might encounter significant mountain passes like Pierre Saint-Martin Pass or enjoy vistas of prominent peaks such as Pic d'Arlas and the majestic Table of the Three Kings (Hiru Erregen Mahaia). The unique karst formations themselves are a major natural highlight.
Yes, Larrako Erreserba Naturala offers several challenging routes accessible by bus. For instance, the Pic d'Arlas – Anie Peak loop from La Pierre Saint-Martin is a difficult 16 km hike with nearly 900 meters of elevation gain, demanding good physical condition and sure-footedness. Another demanding option is the Anie Peak – Cap de la Baitch Hut loop from La Pierre Saint-Martin, covering over 20 km with significant elevation.
Yes, several circular routes are available. For example, the Pierre Saint-Martin Pass – Pierre Saint-Martin Pass loop from La Pierre Saint-Martin offers a 10 km circular hike. Another option is the Camplong Hut – Pas de l'Osque loop from La Pierre Saint-Martin, which is a 12 km circular trail.
The best time to hike in Larrako Erreserba Naturala is generally from late spring to early autumn (May to October). During these months, the weather is more stable, and trails are typically free of snow, making the high-altitude karst terrain more accessible and safer. Always check local weather forecasts before heading out, as conditions can change rapidly in the mountains.
While many areas in natural parks are dog-friendly, it's crucial to check specific regulations for Larrako Erreserba Naturala. Generally, dogs should be kept on a leash to protect wildlife and ensure the safety of other hikers. Some protected zones or specific trails might have restrictions, so always look for local signage or consult the park's official guidelines.
For general hiking on established trails, permits are typically not required. However, if you plan to engage in specific activities like caving in the underground systems or accessing highly sensitive ecological areas, special permits might be necessary. It's always best to verify with the local visitor center or park authorities if you have specific plans beyond standard hiking.
The duration of these hikes varies significantly based on their difficulty and length. Moderate routes, such as the Pierre Saint-Martin Pass – Pierre Saint-Martin Pass loop, can take around 3-4 hours. More difficult and longer trails, like the Pas d'Azuns – Cap de la Baitch Hut loop (over 26 km), can require 10 hours or more to complete, so plan accordingly.
The bus-accessible trails in Larrako Erreserba Naturala are highly rated by the komoot community, with an average score of 4.57 stars from 882 ratings. Hikers often praise the dramatic karst landscapes, the challenging yet rewarding ascents to peaks, and the sense of wilderness found along these routes.
While the Larrako Erreserba Naturala is a wild and remote area, you may find limited facilities near major access points like the Pierre Saint-Martin Pass or the Larra-Belagua Visitor Center. It's always recommended to carry sufficient food and water for your hike, as options directly on the trails are scarce. Check for small eateries or shops in nearby villages before or after your adventure.


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