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Hiking trails & Routes
Spain
Basque Country
Gipuzkoa
Donostia/San Sebastián
Errenteria

San Markos Trail (SL-GI 3)

Moderate

5.0

(1)

6

hikers

San Markos Trail (SL-GI 3)

02:07

6.79km

230m

Hiking

Hike the moderate 4.2-mile San Markos Trail (SL-GI 3) in Lau Haizeta Park to the historic San Markos Fort for panoramic views.

Last updated: February 26, 2026

Waypoints

A

Start point

Parking

Get Directions

1

4.31 km

San Marcos Fort

Highlight • Historical Site

In the beautiful Lau Haizeta park, right between the municipalities of Errenteria, Astigarraga and Donostia-San Sebastián, you can find this beautiful military fort from the 19th century.
Although it is …

Translated by Google •

Tip by

2

4.89 km

Ruins of Kutarro Castle

Highlight • Castle

Although now only a few ruins remain of what once was, a castle once stood here.
There is now an area with picnic tables, ideal for stopping for lunch.
If …

Translated by Google •

Tip by

B

6.79 km

End point

Parking

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Way Types & Surfaces

Way Types

2.46 km

1.68 km

1.33 km

937 m

359 m

Surfaces

2.15 km

1.32 km

1.21 km

941 m

937 m

206 m

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Elevation

Elevation

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Weather

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Saturday 6 June

25°C

14°C

0 %

Additional weather tips

Max wind speed: 14.0 km/h

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Frequently Asked Questions

Where does the San Markos Trail (SL-GI 3) start, and is there parking available?

The trail typically starts near the Mikel Odriozola Stadium in Errenteria, Gipuzkoa. There is usually parking available in the vicinity of the stadium, which serves as a convenient trailhead for this route.

Is this trail suitable for beginners or families?

The San Markos Trail (SL-GI 3) is generally rated as

moderate

. While it requires good fitness, many paths are accessible. Some sections may be uneven or obscured by forest growth, so sure-footedness is beneficial. Families with some hiking experience should find it manageable, but it's not ideal for very young children or strollers due to the varied terrain.

What is the terrain like on the San Markos Trail (SL-GI 3)?

The terrain varies, including accessible paths and sections that may be uneven. As it ascends Mount Bizarain, you might encounter areas with forest growth, branches, ferns, and brambles. Good hiking shoes are recommended for comfort and stability.

What are the main points of interest and views along the route?

The primary highlight is the historic San Marcos Fort, an 19th-century military construction offering expansive panoramic views of San Sebastián, Pasaia, and Txingudi Bay. The trail also passes through Lau Haizeta Park, which features significant megalithic remains like dolmens and the Txoritokieta Monolith. You'll enjoy picturesque hill country sights and diverse natural views throughout the hike.

How long does it typically take to complete the hike?

The San Markos Trail (SL-GI 3) is approximately 6.8 kilometers (4.2 miles) long. It typically takes around 2 hours and 7 minutes to complete, depending on your pace and how much time you spend exploring the fort and enjoying the views.

Is the San Markos Trail (SL-GI 3) a loop?

Yes, the San Markos Trail (SL-GI 3) is designed as a circular route, meaning you will end up back near your starting point without needing to retrace your steps.

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

The trail can be enjoyed year-round, but spring and autumn offer particularly pleasant conditions with milder temperatures and vibrant natural scenery. April 25th, San Marko day, is a culturally significant time when locals make a pilgrimage to the fort, offering a unique experience if you wish to join.

Is the San Markos Trail (SL-GI 3) dog-friendly?

Yes, the trail is generally dog-friendly. However, it's always recommended to keep your dog on a leash, especially in areas with wildlife or other hikers, and to clean up after your pet.

Are there any permits or entrance fees required for this route?

No, there are no specific permits or entrance fees required to hike the San Markos Trail (SL-GI 3) or to access Lau Haizeta Park. The San Marcos Fort itself is integrated into the park as a cultural and recreational facility, often with free access to its visitor reception and panoramic viewpoint.

What should I know about Lau Haizeta Park, where the trail is located?

Lau Haizeta Park is a significant natural and historical area that hosts the San Markos Trail (SL-GI 3). It's known for its natural beauty, historical sites like the San Marcos Fort, and megalithic remains. There are no entrance fees for the park, but visitors are encouraged to respect the natural environment, stay on marked paths, and follow local regulations regarding litter and noise.

Does this trail connect with other hiking routes?

Yes, while the San Markos Trail (SL-GI 3) is a distinct route, it shares sections with other official trails. You will find it intersects with parts of the Errenteriatik Aiako Harrira, La Herradura, and PR-Gi 1005 routes, offering opportunities for longer or alternative explorations if desired.

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