Routes

Planner

Features

Updates

App

Login or Signup

Get the App

Login or Signup

Routes
Gravel rides
Spain
Basque Country
Gipuzkoa
Tolosa

Altzo

The best gravel rides around Altzo

21

riders

3

rides

Gravel biking around Altzo, located in the Gipuzkoa province of Spain, offers routes characterized by significant elevation changes and varied terrain. The region features a landscape of rolling hills and valleys, often covered in dense woodland, providing a challenging environment for gravel cyclists. Routes frequently traverse rural roads and tracks, connecting small towns and natural features. The area's topography ensures that most gravel bike trails in Altzo include substantial climbs and descents.

Best gravel bike trails around Altzo

  • The most…

Last updated: July 3, 2026

10

riders

#1.

Santa Cruz Tunnel – Witches' Bridge loop from Tolosa

110km

07:04

1,760m

1,760m

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Navigate with device

Send to Phone

Save

Hard

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard
guide_signup
Let us show you the way with the komoot mobile app
With a free komoot account, you can easily find, customize, and navigate endless outdoor adventures.

Sign up for free

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

Hard

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

Start today with a free account

Your next adventure awaits.

Login or Signup

Popular around Altzo

Road Cycling Routes around Altzo

Hiking around Altzo

Cycling around Altzo

MTB Trails around Altzo

Running Trails around Altzo

Tips from the Community

inakio
September 8, 2025, Plazaola Greenway

Great route for beginners as has mainly constant and light slopes. Only half a dozen uphills the first 30 km from Pamplona.

0

0

One of the ideal areas to start the Plazaola greenway

Translated by Google

0

0

Although you have to make a slight detour, it is worth visiting this bridge and taking a photo on it if you want.

Translated by Google

0

0

That bridge is called "INTUIA-ko zubia" the INTUIA farmhouse is next to it. The misnamed "witches' bridge" is called UNANIBI-ko zubia, right in the Otita park (beginning of the Leitzaran valley). Don't forget to bring lights to cross the numerous tunnels in this valley!! Not to see but to be seen.

Translated by Google

1

0

A must when you pass through this area. Stopping and having a coffee is almost mandatory. 😉

Translated by Google

0

0

One of the best greenways we know.

Translated by Google

0

0

This beautiful city located in the valley of the Oria River is surrounded by small mountains and green meadows. Thus, it offers you the possibility of escaping from the noise of the city in a few minutes. Furthermore, in its historic center is the church of San Martín de Tours, which is undoubtedly worth a visit.

Translated by Google

3

0

Sandra
September 7, 2023, Plazaola Greenway

Great tour always along the river and through countless tunnels. Also recommended in hot weather. Bring light if possible.

Translated by Google

0

0

Frequently Asked Questions

What is the general difficulty level of gravel biking trails around Altzo?

Gravel biking around Altzo is characterized by challenging routes. All listed trails are classified as difficult, featuring significant elevation changes and varied terrain, making them best suited for experienced riders.

What kind of terrain can I expect on gravel bike routes in Altzo?

You can expect a diverse landscape of rolling hills and valleys, often covered in dense woodland. Routes frequently traverse rural roads and tracks, with substantial climbs and descents throughout the region.

Are there any notable landmarks or natural features to see along the gravel trails?

Yes, some routes pass by interesting landmarks. For instance, the long-distance route Santa Cruz Tunnel – Witches' Bridge loop from Tolosa includes the Santa Cruz Tunnel and the historic Witches' Bridge. You might also encounter the Plazaola Greenway on some sections.

How many gravel bike trails are available in the Altzo area?

There are at least 5 gravel bike trails detailed for the Altzo area, all offering challenging experiences for riders.

What is the typical elevation gain on gravel bike routes near Altzo?

The routes in Altzo feature significant elevation gain. For example, the Free Climbing – Andoain loop from Asteasu involves nearly 900 meters of ascent over its 46.5 km distance.

Are there any circular gravel bike routes in Altzo?

Yes, many of the gravel bike routes around Altzo are designed as loops. Examples include the Olantza Borda – Berrobi loop from Tolosa-Centro and the Gaztelu Church – Berrobi loop from Tolosa, allowing you to start and finish at the same point.

What is the best season for gravel biking in Altzo?

Given the region's varied terrain and potential for dense woodland, spring and autumn generally offer the most pleasant conditions with milder temperatures and vibrant scenery. Summer can be warm, and winter might bring more challenging weather.

Are there any family-friendly gravel biking options in Altzo?

Due to the difficult classification and significant elevation changes of all listed routes, the gravel bike trails directly around Altzo are generally not recommended for families with young children or beginner cyclists. They are better suited for experienced riders.

Where can I find parking facilities for cyclists near Altzo trailheads?

While specific parking facilities for each trailhead are not detailed, routes often start from towns like Tolosa or Asteasu. You would typically look for public parking options within these towns to access the starting points of the trails.

Can I reach the gravel biking areas around Altzo using public transport with my bike?

Accessing the starting points of these routes, such as Tolosa or Asteasu, by public transport is generally possible. However, policies regarding bikes on public transport (trains or buses) can vary, so it's advisable to check with local transport providers in Gipuzkoa beforehand.

What is the longest gravel bike route available in the Altzo area?

The longest gravel bike route is the Santa Cruz Tunnel – Witches' Bridge loop from Tolosa, spanning 109.3 km (67.9 miles) with over 1700 meters of elevation gain.

What do other gravel bikers say about the trails in Altzo?

More than 30 gravel bikers have explored the routes in Altzo using komoot, indicating a community of riders who appreciate the region's varied and challenging terrain. They often highlight the difficult nature of the routes and the rewarding climbs.

Are there any cafes or places to stop for refreshments along the gravel routes?

The routes traverse rural landscapes and connect small towns. While specific cafes are not listed, starting points like Tolosa offer amenities. For example, the Old Bridge – Tolosa Train Station loop from Ikaztegieta passes through areas where you might find local establishments.

Most popular routes around Altzo

Road Cycling Routes around Altzo

Most popular attractions around Altzo

Places to see

Store rating

Get inspired with the komoot mobile app

With a free komoot account, you can easily find, customize, and navigate endless outdoor adventures.

or

Join komoot Now

Store rating

Explore more

Browse the best Gravel rides in other regions.

AsteasuBerastegiElduainZizurkilLizartzaOrexaAdunaAlkizaBelauntzaVillabona-AmasaLarraulTolosaIbarraHernialdeIruraBerrobiAnoetaAralar Parke Naturala/Parque Natural De AralarAlegiaBidania-GoiatzAlbizturBaliarrainAbaltzisketaLegorretaAmezketaOrendainIkaztegietaLeaburu

Nearby adventure guides

Things to Do around Tolosa

background

Get ready to conquer new peaks

Sign up for Free

Explore
RoutesRoute plannerFeaturesHikesMTB TrailsRoad cycling routesBikepackingSitemap
Download the app
Follow Us on Socials

© komoot GmbH

Privacy Policy