49
hikers
6
hikes
Mountaineering around Sierra De Aralar offers a diverse landscape characterized by dramatic limestone massifs and karstic topography, including lapiaces and blind valleys. The region features significant peaks such as Txindoki, known for its pyramidal profile, and Irumugarrieta, the highest point in the range. Extensive pastures and ancient beech forests, like those around Akaitz, provide varied terrain for challenging ascents and scenic routes.
Last updated: May 17, 2026
17
hikers
11.8km
05:49
970m
970m
Hard mountaineering route. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
16
hikers
9.87km
04:57
810m
810m
Hard mountaineering route. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

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6
hikers
5.75km
02:47
540m
540m
Moderate mountaineering route. Good fitness required. Mostly accessible paths. Sure-footedness required.
4
hikers
Hard mountaineering route. Very good fitness required. Mostly accessible paths. Sure-footedness required.
4
hikers
21.4km
07:35
880m
880m
Hard mountaineering route. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
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From one of the access parking lots.
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Right next to the famous San Donato hermitage.
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The Lareo reservoir is a small reservoir in a beautiful environment. The sheet of water creates a beautiful visual game with the dense forest that surrounds it.
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This spectacular path through the beech forest is just a small sample of the incredible beauty of Aralar. The path runs pristine under the forest and, in some sections, looks out like a balcony from the cliffs.
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The route connects again with the PR-NA 201 at the milestone where the Vertical Kilometer appears on the right, continuing straight through the panoramic mountain meadow to the popular hermitage of San Donato. Part of the sanctuary is converted into a mountain refuge and is delicious when there is a blizzard or bad weather, as was the case the day we did the route. The geodesic vertex of Beriain is next door, on the rocky tip of a cliff that concentrates the kingdom of abysses and cliffs that float above the towns of the Sakana.
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Artificial lake going up the Sierra de Aralar.
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The Lareo reservoir is located in the Aralar Natural Park, near the border with Navarra. It is a small swamp and is surrounded by beech and larch trees, which take on bright colors in the fall. The tour starts from the Parketxe de Lizarrusti interpretation center.
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The Labeo dolmen is located near Lareoko urtegia, and Malkorburu. Of religious or funerary origin, it belongs to the Neolithic, Chalcolithic-Eneolithic and Bronze periods.
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There are over 7 mountaineering routes documented in Sierra De Aralar, offering a range of experiences from moderate to difficult. These routes allow you to explore the region's unique karstic landscapes, ancient forests, and impressive peaks.
While many routes in Sierra De Aralar are challenging, you can find moderate options suitable for those with some experience or families looking for a less strenuous climb. Consider the Larrunarri - Txindoki loop from Amezketa, which offers a rewarding experience without the extreme difficulty of some other ascents. Another moderate choice is the Amezti loop from Amezketa.
For experienced mountaineers seeking a challenge, Sierra De Aralar offers several difficult routes. The Beriain loop from Uharte Arakil is a demanding 7.3-mile trail with significant elevation gain. Another excellent option is the Sierra de San Donato loop from Ergoiena, which traverses varied and rocky terrain.
Yes, many of the mountaineering routes in Sierra De Aralar are designed as loops, allowing you to start and finish at the same point. Popular circular routes include the Beriain loop from Uharte Arakil, the Sierra de San Donato loop from Ergoiena, and the scenic Lareo Reservoir – Spectacular trail through beech trees loop from Lizarrustiko lepoa.
The best time for mountaineering in Sierra De Aralar is generally from spring to autumn. During these seasons, the weather is more stable, and trails are typically free of snow, making for safer and more enjoyable ascents. Autumn is particularly beautiful with the vibrant colors of the beech forests.
Sierra De Aralar is renowned for its dramatic karstic topography, including limestone pavements and blind valleys. You'll encounter extensive high-altitude pastures, ancient beech forests, and picturesque water features like the Lareo reservoir. Many routes offer panoramic views from cliffside balconies and summits like Txindoki (1,346 m) and Beriain Summit.
Yes, Sierra De Aralar is rich in cultural and historical sites. You can visit the ancient San Miguel de Aralar Sanctuary, an 11th-century Romanesque church. The area is also dotted with numerous megalithic monuments, including dolmens and cromlechs, adding a historical dimension to your treks. The Lizarrusti Pass is another notable point of interest.
Public transport options to the trailheads in Sierra De Aralar can be limited. While some villages like Uharte Arakil and Amezketa might have bus connections from larger towns, direct routes to specific starting points are not always frequent. It's advisable to check local bus schedules in advance or consider private transport for greater flexibility.
Sierra De Aralar is a Natural Park, and while dogs are generally welcome, it's important to keep them on a leash, especially in areas with grazing livestock (Latxa sheep, cattle, wild horses) and to protect local wildlife. Always ensure you clean up after your dog to preserve the natural environment.
You'll find some facilities in the villages surrounding Sierra De Aralar. For example, near the Lizarrusti Pass, there's the Lizarrusti Visitor Centre which often has a cafe. The town of Lekunberri, a gateway to the park, offers more options for accommodation, cafes, and restaurants. It's recommended to plan your stops, especially for longer routes.
Generally, you do not need a specific permit for hiking or mountaineering on the established trails within Sierra De Aralar Natural Park for day trips. However, it's always good practice to check with the Lizarrusti Visitor Centre for any specific regulations or temporary restrictions, especially if planning overnight stays or activities requiring special access.
Given the varied terrain and potential for changing weather in Sierra De Aralar, it's crucial to wear sturdy hiking boots with good ankle support. Layered clothing is recommended, including waterproof and windproof outer shells, as conditions can change rapidly. Bring sun protection, a hat, gloves, and plenty of water and snacks, especially for longer routes.


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