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Spain
Basque Country
Gipuzkoa
Goierri
Ataun

Lareo Reservoir Trail

Moderate

4.9

(12)

82

hikers

Lareo Reservoir Trail

03:52

10.9km

430m

Hiking

Hike the moderate 6.8-mile Sarastarri trail from Lizarrusti Port in Aralar Natural Park, featuring the Lareo Reservoir and panoramic 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

A

Start point

Parking

Get Directions

1

4.57 km

Lareo Reservoir

Highlight • Lake

Nice reservoir surrounded by a beech forest and a track that makes it very comfortable to go around it. Especially cool in the fall.

Translated by Google •

Tip by

2

5.96 km

Sarastarri Cave

Highlight • Cave

Cave of karstic origin that houses a lagoon inside, highly recommended to visit.

Translated by Google •

Tip by

3

6.42 km

Sarastarri Summit

Highlight • Summit

Summit of the Sierra de Aralar located in the natural park of the same name. In its surroundings there are a good number of cavities and caves that attract archaeologists …

Translated by Google •

Tip by

B

10.9 km

End point

Parking

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Way Types & Surfaces

Way Types

4.58 km

4.02 km

2.26 km

< 100 m

Surfaces

4.74 km

2.73 km

2.46 km

1.01 km

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (950 m)

Lowest point (630 m)

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Weather

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Today

Saturday 23 May

31°C

13°C

0 %

Additional weather tips

Max wind speed: 9.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

Where does the Sarastarri trail start and is there parking available?

The trail officially starts at Lizarrusti Port, which serves as a primary gateway to the Aralar Natural Park. You'll find an interpretation center, a hostel, and a restaurant there. Parking is available at Lizarrusti Port, making it a convenient starting point for your hike.

What is the best time of year to hike the Sarastarri trail?

The trail offers a rewarding experience throughout much of the year. However, for the most pleasant conditions, consider hiking during spring or autumn when temperatures are milder and the natural scenery is particularly vibrant. While possible in summer, be prepared for warmer weather. Winter hiking is also an option, but be aware of potential snow or ice, especially at higher elevations, and check weather conditions beforehand.

Are there any permits or entrance fees required for hiking in Aralar Natural Park?

No, there are generally no specific permits or entrance fees required to access and hike the trails within Aralar Natural Park, including the Sarastarri route. The park is open for public enjoyment. However, always respect local regulations and leave no trace.

Is the Sarastarri from Lizarrusti Port trail dog-friendly?

Yes, the trail is generally dog-friendly. However, it's crucial to keep your dog on a leash, especially given that you'll be hiking in a natural park where wildlife is present and livestock may graze. Always carry waste bags and ensure your dog is well-behaved around other hikers and animals.

What is the terrain like on the Sarastarri trail?

The terrain is diverse, starting with an ascent through the steep Lizarrusti Gorge, which includes vertical walls and a tunnel. You'll encounter well-maintained paths through beech and pine forests, but also areas with decomposed ground and noticeable slopes. The final ascent to the summit might have less defined paths, so GPS can be helpful. Appropriate footwear is highly recommended due to some uneven and demanding sections.

How long does it typically take to complete the Sarastarri hike?

The hike is approximately 10.9 km long and typically takes around 3 hours and 52 minutes to complete. This duration can vary based on your fitness level, the number of stops you make, and weather conditions.

What are the main points of interest along the Sarastarri trail?

Key highlights include the picturesque Lareo Reservoir, the unique Sarastarri Cave (which contains a small lake and requires a headlamp for exploration), and the rewarding Sarastarri Summit, offering extensive panoramic views.

What kind of views can I expect from Sarastarri Summit?

From the Sarastarri Summit (around 989-995 meters), you'll be treated to privileged and beautiful panoramic views of the Aralar Natural Park. This includes prominent mountains like Txindoki, Ganboa, Anboto, and the Sierra de Aizkorri, as well as the Sierras de Urbasa and Andía, offering a truly rewarding vista.

Does the Sarastarri trail connect with other hiking routes?

Yes, sections of this route follow parts of several official trails. You'll intersect with routes such as Aralarko bira, Lareo ibilbidea, Artzaintza naturbidea, and the GR20 long-distance path, among others like E1 Gaztaren Ibilbidea: Lizarrusti - Ordizia and E3 Altxonbide ibilbidea: Zaldibia - Lizarrusti.

Is the Sarastarri trail suitable for beginners or families?

While some sections are well-maintained, the trail is generally categorized as moderate due to its length, elevation gain (around 426 meters), and some short, demanding ramps and sloped sections. It's best suited for hikers with good fitness. Families with younger children or beginners might find certain parts challenging, so assess your group's experience level carefully.

Are there facilities or amenities available at Lizarrusti Port?

Yes, Lizarrusti Port, the starting point for this hike, is well-equipped. It features an interpretation center for the Aralar Natural Park, a hostel for overnight stays, and a restaurant where you can grab a meal or refreshments before or after your hike.

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