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Gipuzkoa

Donostia/San Sebastián

Top 4 Caves around Donostia/San Sebastián

Best caves around Donostia/San Sebastián are found within a region characterized by diverse geological formations. The area, part of the Basque Country, features both coastal rock formations and inland cave systems. These natural features offer opportunities for exploration and provide insights into the area's natural history. The surrounding Gipuzkoa province also contains significant prehistoric and geological cave sites.

Best caves around Donostia/San Sebastián

  • The most popular caves is Muganix Summit (758 m), a summit that hosts the Junkal cave. This cavity is located on one of the peaks of Peñas de Aia and is a site for mountain celebrations.
  • Another must-see spot is Valley of Colors (Valle de los Colores), a natural monument featuring sandstone caves. Visitors can observe numerous geoforms and a variety of rock colors created by erosion over millions of years.
  • Visitors also love Peña de Ataloi, a natural rock formation on the coastal path of Mount Ulia. This unique formation offers a scenic point of interest during a coastal hike.
  • Donostia/San Sebastián is known for natural rock formations, summit caves, and trail-side tunnels. These include coastal curiosities and cavities found within mountain peaks.
  • The caves around Donostia/San Sebastián are appreciated by the komoot community, with 33 upvotes and 27 photos shared by users.

Last updated: May 14, 2026

Peña de Ataloi

Highlight • Natural Monument

On the coastal path of the route to the cliffs of Mount Ulia in San Sebastian we come across the Peña de Ataloi, this strange and beautiful rock formation in the shape of a cave that melts in your hands.

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Valley of Colors (Valle de los Colores)

Highlight • Natural Monument

The Valley of Colors is an authentic open-air museum, where you will discover the magic that erosion can create over millions of years.
In this magical place, you can enjoy numerous geoforms and a variety of colors in the rocks.

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Muganix Summit (758 m)

Highlight • Summit

One of the peaks of Peñas de Aia is home to the Junkal cave, a cavity that is the object of mountain celebrations.

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Karrika River Trail to Bidaita

Highlight (Segment) • Trail

Forest trail along the Karrika River. The trail passes through a small tunnel near Bidaita. The forested landscape is the perfect setting for any good hike.

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Filón de San Joaquín Cave

Highlight • Cave

You can't get here because the route no longer exists (slipped). Just follow the trail marker instead of komoot. At the end there is a great river where you can refresh yourself in the summer

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Popular around Donostia/San Sebastián

Through the Basque Country on shepherd's paths - Caminos de Transhumancia (GR 34)

Cycling along the Cantabrian coast – the Northern Way

From the coast to the mountains – Tour of the Basque Country

Between the sea and the mountains — GR 121: Tour of Guipúzcoa

Hiking around Donostia/San Sebastián

Running Trails around Donostia/San Sebastián

Road Cycling Routes around Donostia/San Sebastián

Cycling around Donostia/San Sebastián

MTB Trails around Donostia/San Sebastián

Gravel biking around Donostia/San Sebastián

Other adventures around Donostia/San Sebastián

Through the Basque Country on shepherd's paths - Caminos de Transhumancia (GR 34)

Hiking Collection by

Claudia Aguilar González

Tips from the Community

Lea
September 29, 2025, Peña de Ataloi

The path branches off from the main trail and is unfortunately now completely overgrown.

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BEAUTIFUL TRAIL WITH ULIA CLIFFS

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Forest trail along the Karrika River. The trail passes through a small tunnel near Bidaita. The forested landscape is the perfect setting for any good hike.

Translated by Google

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The Valley of Colors is an authentic open-air museum, where you will discover the magic that erosion can create over millions of years. In this magical place, you can enjoy numerous geoforms and a variety of colors in the rocks.

Translated by Google

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One of the peaks of Peñas de Aia is home to the Junkal cave, a cavity that is the object of mountain celebrations.

Translated by Google

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On the coastal path of the route to the cliffs of Mount Ulia in San Sebastian we come across the Peña de Ataloi, this strange and beautiful rock formation in the shape of a cave that melts in your hands.

Translated by Google

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Taffonis du Jaizkebel: some explanations on their training: https://planet-terre.ens-lyon.fr/ressource/Img503-2015-08-31.xml

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You can't get here because the route no longer exists (slipped). Just follow the trail marker instead of komoot. At the end there is a great river where you can refresh yourself in the summer

Translated by Google

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Frequently Asked Questions

What types of caves can I explore near Donostia/San Sebastián?

The region offers a diverse range of cave experiences. You can find impressive Paleolithic art replicas at Ekainberri, explore vast geological formations and paleontological sites at Arrikrutz Caves, or discover natural rock formations like Peña de Ataloi along coastal paths. There are also summit caves like the Junkal cave at Muganix Summit (758 m) and sandstone caves at Valley of Colors.

Are there family-friendly cave experiences near Donostia/San Sebastián?

Yes, Ekainberri is particularly well-suited for families. It offers an immersive guided experience with reproductions of 14,000-year-old cave paintings and demonstrations of ancient fire-making and hunting techniques, making it engaging for all ages. The Valley of Colors also provides an accessible outdoor experience to observe unique geological formations.

What historical or cultural significance do the caves in this region hold?

The Ekainberri replica cave is a UNESCO World Heritage site, showcasing exceptionally well-preserved Paleolithic cave paintings from around 14,000 years ago, primarily depicting bison, horses, and deer. These provide a unique window into early human culture and art in the Basque Country.

What geological features can I expect to see in the caves?

The Arrikrutz Caves are renowned for their impressive geological formations, including numerous stalactites and stalagmites. The Valley of Colors features stunning sandstone caves with a variety of rock colors and geoforms created by millions of years of erosion. Peña de Ataloi is a unique natural rock formation on the coast.

Can I see prehistoric animal remains in any of the caves?

Yes, the Arrikrutz Caves are a significant paleontological site. Guided tours through Gallery 53 allow visitors to see where remains of prehistoric animals such as cave bears, woolly rhinoceros, cave hyenas, giant deer, and even a complete skeleton of a cave lion have been discovered.

Are there hiking trails that include cave features near Donostia/San Sebastián?

Yes, several trails offer cave-related features. The Peña de Ataloi is a scenic rock formation on the coastal path of Mount Ulia. The Karrika River Trail to Bidaita includes a small tunnel. For more hiking options, explore the Hiking around Donostia/San Sebastián guide.

What outdoor activities can I combine with a cave visit?

Many caves are located within or near natural parks, offering opportunities for hiking and exploring the surrounding landscapes. For example, Arrikrutz Caves are in the Aizkorri-Aratz nature park. You can find various hiking routes in the area, including easy options like the Watchtower Route (GR 121) or the Northern Way. Check out the Hiking around Donostia/San Sebastián and Easy hikes around Donostia/San Sebastián guides for more ideas.

How accessible are the caves by public transport or car?

Ekainberri is located in Zestoa, about a 30-minute drive from Donostia-San Sebastián. Arrikrutz Caves are in Oñati, within the Aizkorri-Aratz nature park, also typically accessed by car. For specific public transport options, it's best to check local services for routes to Zestoa or Oñati, as direct routes to the cave entrances might be limited.

What should I wear for cave exploration?

Caves maintain a consistent cool temperature year-round, so it's advisable to wear layers, even in summer. Comfortable walking shoes with good grip are essential, as surfaces can be uneven or damp. Some tours might require helmets, which are usually provided.

Are there any challenging cave experiences for experienced explorers?

The Filón de San Joaquín Cave is categorized as challenging. It's important to note that access might be difficult due to terrain changes, and it's recommended to follow trail markers rather than relying solely on older route information. Always prioritize safety and check current conditions for challenging routes.

What do visitors enjoy most about the caves around Donostia/San Sebastián?

Visitors frequently appreciate the unique blend of natural beauty and historical significance. The stunning rock formations, the vibrant colors at the Valley of Colors, and the ancient art at Ekainberri are often highlighted. The opportunity to combine cave exploration with scenic coastal hikes or mountain trails also receives positive feedback.

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