5.0
(1)
1
hikers
07:24
22.0km
880m
Hiking
This difficult 13.7-mile hike in Aralar Natural Park features the Lareo Reservoir, dense forests, and views from Sarastarri Summit.
Last updated: February 26, 2026
Tips
Your route passes through protected areas
Please check local regulations for:
Aralar parke naturala/Parque Natural de Aralar
Waypoints
Start point
Parking
Get Directions
11.2 km
Highlight • Lake
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Tip by
12.6 km
Highlight • Cave
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Tip by
13.1 km
Highlight • Summit
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Tip by
22.0 km
End point
Parking
Way Types & Surfaces
Way Types
8.30 km
6.76 km
5.50 km
797 m
295 m
236 m
Surfaces
12.6 km
5.50 km
1.89 km
1.20 km
290 m
241 m
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Elevation
Highest point (960 m)
Lowest point (210 m)
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Weather
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Monday 25 May
32°C
19°C
0 %
Additional weather tips
Max wind speed: 7.0 km/h
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This route was planned by komoot.
This challenging hike, covering approximately 22 kilometers with an elevation gain of 880 meters, typically takes around 7 hours and 24 minutes to complete. Hikers should be prepared for strenuous sections and allow ample time.
The trail begins at Lizarrusti Pass. This location offers an interpretation center for the Aralar Natural Park and is the primary starting point. Parking is generally available here, making it convenient for hikers arriving by car.
The terrain is varied and demanding. You'll encounter mostly accessible paths, but also sections requiring sure-footedness. The initial part through the Lizarrusti Gorge is steep, with some vertical cuts that may require using a solitary chain as a handrail. The route includes passing through a tunnel, along a river, and through thick beech and pine forests. As you approach the Sarastarri Summit, the path can become less defined.
This trail offers several notable points of interest. You'll pass by the beautiful Lareo Reservoir, an artificial lake integrated into the natural environment. Near the summit, you can explore the Sarastarri Cave, which is described as not dangerous and enjoyable to explore (though sufficient light is recommended). The route also features ancient megalithic monuments, including dolmens and menhirs, showcasing the region's rich history.
No, this trail is classified as 'difficult' and requires 'very good fitness' and 'sure-footedness'. It is not recommended for beginners or families with young children due to its length, significant elevation gain, and challenging terrain, including steep sections and potentially less defined paths.
The trail is particularly beautiful in autumn when the dense beech and pine forests display vibrant colors. However, it can be hiked in other seasons too, provided weather conditions are favorable. Always check the forecast before heading out, especially given the trail's difficulty.
While the Aralar Natural Park generally welcomes dogs, it's crucial to keep them on a leash to protect local wildlife and livestock, and to respect other hikers. Always follow park regulations regarding pets.
Generally, there are no specific permits or entrance fees required to hike this trail within the Aralar Natural Park. However, it's always a good idea to check the official Aralar Natural Park website or the interpretation center at Lizarrusti Pass for any updated regulations or seasonal restrictions before your visit.
Yes, parts of this route follow sections of the GR20 long-distance path, which is well-marked with white, red, and green markers. The trail also intersects with other local paths such as Aralarko bira and Arkaka - Lareo ibilbidea for significant portions.
The Aralar Natural Park is home to diverse wildlife. While specific sightings are never guaranteed, you might encounter various bird species, deer, wild boars, and other small mammals. The park's rich forests and varied habitats provide a home for many creatures.
The starting point at Lizarrusti Pass, where the Aralar Natural Park interpretation center is located, may offer some basic facilities or information about nearby services. For more extensive options like cafes or restaurants, you would likely need to venture into the closest towns or villages surrounding the park.