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Bletterbach Geopark

The Bletterbach Geopark (Geoparc Bletterbach) is one of the 10 nature parks in the Dolomites of northern Italy. It is the smallest of the parks, but it is both scientifically and recreationally unique and important. The park’s main feature is a deep gorge that showcases a large rocky outcropping where the entire geological history of the Dolomites can be seen with the naked eye. The gorge is located under the slope of the only named mountain in the park—Corno Bianco / Weißhorn (2,316 m / 7,598 ft).

Bletterbach Geopark, Italy

Naming of the Park

Bletterbach Geopark (Geoparc Bletterbach) is named after the creek Bletterbach, which created the gorge that the park is known for. Its headwaters begin on Corno Bianco / Weißhorn and the creek flows in a southwestern direction.

The stream is also called Rio delle Foglie in Italian, so the geopark also has a second name—Geoparc Rio delle Foglie.

However, the word "geopark" in the park’s name is also important. It speaks to its second main feature of the park and its primary difference from other parks in both the West Dolomites and the East Dolomites.

A geopark is a special type of park with a focus on geology. It is part of the UNESCO Global Geoparks Network. The system was created to preserve the geological heritage of the Earth. In total, there are just 75 such parks in Europe in 26 countries, and 161 parks in 44 countries worldwide (as of 2021). In comparison, there are 63 national parks in the US alone, 40 in Finland, more than 50 in Russia, and so on.

In the Dolomites, there is only one other such park—Adamello-Brenta Geopark—which is also designated as a regional nature park.

The Bletterbach Geopark is also considered a natural monument. It was established in 2005 at the initiative of the local municipality. Just four years later, in 2009, it also received the status of UNESCO World Heritage Site, after Dolomites was added to the list.

The locals also often call Bletterbach the “Grand Canyon of South Tyrol” as it is the largest canyon in the province of South Tyrol. In my opinion, this is a very good advertising slogan that attracts plenty of tourists.

Bletterbach Geopark, Italy


Geoparc Bletterbach is located in the municipality of Aldino / Aldein in the province of Bolzano / South Tyrol, which is part of the autonomous region of Trentino—Alto Adige / South Tyrol. Aldino / Aldein borders the municipalities of Bronzolo, Carano, Daiano, Montan, Deutschnofen, Auer, Truden, and Varena.

The total area of the park is 2.71 sq km (1 sq mi). It is really small compared to such large parks in the Dolomites as, for example, Paneveggio—Pale di San Martino Nature Park which has an area of 191 sq km (73.7 sq mi).

Getting to Geoparc Bletterbach

The easiest and fastest way to get to the geopark is from the provincial capital, the city of Bolzano. Because of the mountains, you can't get here via a direct route, so you have to go around the mountains and valleys.

By car, it takes you approximately 51 min (41.3 km / 25.6 mi) from the south through Aldino. From the north, through the neighboring municipality of Nova Ponente / Deutschnofen, it takes about 51 min (40.4 km / 25.1 mi), too.

Bletterbach Geopark, Italy

The choice of route depends on where you are coming from in Bolzano. If you’re coming from Trento and Verona in the south, choose the route via Nova Ponente / Deutschnofen. If you’re coming from Innsbruck, Austria, and Munich, Germany, in the north, it’s better to go via Aldino. In both cases, you will see more beautiful scenery.

The geopark is also a good place to visit on your way from Austria or Germany to northern Italy, but it’s better to have one full day available to you in the park for hiking in the canyon.

For those who don’t have or don’t plan to rent a car, I recommend taking bus number 146, which runs from Aldino to the park (a 20-minute trip). Check the schedule at Suedtirolmobil.info, as well as other information about local transportation throughout the province.


The Bletterbach Gorge is “only” about 15,000 to 18,000 years old, even though the rocks that form it are several hundred million years old (they date back from the Permian to the Triassic). Throughout the millennia, the rocks in the gorge have been subjected to strong weathering and erosion. But ,today you can see the formation of the primary rock strata of the Dolomites in the gorge.

A brief summary of what you'll see once you're in the canyon on the hiking trail:

  • The first layer is Bolzano quartz porphyry. It is an igneous rock that has large quartz crystals. The Bolzano quartz porphyry is also reddish in color. This type of rock can be seen elsewhere in the Fiemme Valley, such as the Catena di Lagorai mountain range.
  • The second layer is Val Gardena sandstone. This rock is named after one of the five Ladin valleys in the Dolomites.
  • The third layer is dolomite or limestone. The top of Corno Bianco is so-called because it is composed of dolomite, which is known for its ability to absorb the colors of the rainbow, turning it yellow and pink at the sunset and sunrise. The mountain's name means "White Horn" in Italian.

In other words, Bletterbach Gorge is a fantastic place to study geology outside. It is really a unique geological and natural landscape—the only one in the entire Alps.

Passo Oclini, Bletterbach Geopark, Italy

Passo Oclini


The landscape of the Bletterbach Geopark features the pyramidal Corno Bianco mountain and its namesake canyon (Bletterbachschlucht), which runs from it northwestwards towards Seiser Alm / Alpe di Siusi—a Dolomite plateau and the largest high elevation Alpine meadow in Europe.

Here are some of the exact characteristics of the canyon:

  • Length: 8 km (4.9 mi) from east to west
  • Width: 200–300 m (656–984 ft) at the top, 20–30 m (65.6–98.4 ft) at its floor
  • Basin of the upper part of the gorge: 600–700 m (1,968–2,298 ft) in diameter
  • Depth: 400 m (1,312 ft)
  • Total elevation pass with Corno Bianco: 900–1,100 m (2,952–3,608 ft)

There are at least four high waterfalls in the park, too. At the same time, around the gorge, there are glacial deposits from the last glacial maximum that are full of clay, pebbles, and rounded boulders.

Some other places of interest in and around the park include:

  • Neighboring Valleys – To the west of the park, there is the huge valley of Val di Cembra, which stretches from Trento to Bolzano. To the south is Val di Fiemme, to the southeast is Val di Fassa, and to the north is Val di Ega / Eggental.
  • Prominent Nearby Peaks – Next to Corno Bianco there is Corno Nero / Schwarzhorn ( 2,439 m / 8,002 ft) mountain. Its difference from Corno Bianco is also literally recorded in its name—the top of Corno Nero features darker rocks than Corno Bianco.
  • Major Mountain Passes – To the east, exactly between Corno Bianco and Corno Nero / Schwarzhorn, there is the main pass in the area called Passo Oclini / Jochgrimm (1,989 m / 6,525 ft), which separates the two mountains.
  • Other Protected Areas – To the southwest of the park there is also another park—The Trudner Horn Nature Park (Parco Naturale Monte Corno). Note: Trudner Horn / Monte Corno (2,912 m / 9,553 ft) refers to another mountain, not Conco Bianco or Corno Nero.

Bletterbach Geopark, Italy

Flora and Fauna

In addition to rocks and minerals, you can better learn about the flora and fauna of the past while traveling through Geoparc Bletterbach.

Exploration of the canyon began in 1891, but only in the 1930s did Leo Perwanger, an engineer from Redagno, provide a description of the canyon’s geological structure and its ancient flora and fauna.

Since that time, there were numerous geological discoveries in the gorge, including those of well-preserved imprints of parts of plants and wood, primitive marine animals, corals, and Claraia shells, and fossilized imprints of dinosaurs—for example, a short reptile Phalangichnus perwangeri.

In particular, within these geological layers, there are also many traces of an ancient lizard species. It is represented on the Bletterbach Geopark’s logo.

However, we cannot say that we know everything about the canyon. To this day, the local scientists from the Aldino area continue to research the flora and fauna of the canyon, together with specialists from the Museum of Nature South Tyrol in Bolzano, the MUSE Science Museum in Trento, and other museums and universities.

 Bletterbach Geopark, Italy

You can see these and other traces of ancient animals and plants on the rocks and learn more about them in the two geological museums in the area—read more about them later in the guide.

Major Mountain Ranges and Summits

Geology is the main feature of the Bletterbach Geopark. For this reason, based on the choice of UNESCO experts, it was also included among the nine major mountain systems in the Dolomites at number 8, which refers to the Bletterbach system. It is also the smallest of the mountain systems in the region and the most distant from the central part of the Dolomites, if we take Mount Pelmo as the center.

The geopark is also located in the Fiemme Mountains or Fleimstal Alps, which are considered a separate group in the German-Austrian classification of the Eastern Alps (AVE). According to this classification, the system is number 53 in the range. According to another popular classification, the Italian SOIUSA, these mountains are called Dolomiti di Fiemme.

The fact is that these mountains, which consist mainly of granite and porphyry, also include the mineral dolomite, so they are often classified as Dolomites (number 52) for both geological and geographical reasons.

The only mountain in the park, Corno Bianco / Weißhorn, is just such an example—as I already told you about, its summit is made of dolomite. At the same time, and again as opposed to the Dolomites, the rocks on neighboring Corno Nero are reddish-brown quartz porphyry.

 Corno Bianco, Bletterbach Geopark, Italy

Corno Bianco / Weißhorn

Major Trails and Hiking Areas

There are several hiking trails of varying lengths and levels of difficulty available within the park and nearby. These are suitable for experienced hikers, new hikers, and the whole family. Here are the major hikes to check out in the region:

Bletterbach Gorge Geological Trail

The Bletterbach Gorge Geological Trail is the main trail in the park. The trail runs throughout the canyon and while descending into it from the park’s visitor center, you’ll find yourself on a path along the stream Bletterbach. The stream is surrounded by 20 m (65 ft) canyon walls that overhang both sides of the trail.

There are several observation points on the trail from which you can view the canyon from different angles and take incredible photos of the surrounding peaks in the PeakVisor app.

 Bletterbach Gorge Geological Trail, Bletterbach Geopark, Italy

One of the main surprises of the trail is the Butterloch Waterfall, which is less frequently written about in the guidebooks. By the way, all the major waterfalls are also marked in the app.

The route may have several alternatives and longer options, such as from the historic Zirmerhof Hotel in Redagno—the only hamlet of Aldino.

In the latter, and in any case, be sure to take good hiking boots for this trail, because the path is often rocky and rugged.

  • Season: May 1 to November 1
  • Start and finish: Geoparc Bletterbach Visitor Centre and GEOMuseum
  • Type of trail: Loop
  • Number of trails: 3
  • Length: 3.2 km (1.9 mi)
  • Time: 2–3 h
  • Level of difficulty: Easy
  • Elevation gain: 168 m (551 ft)

Malga Laner—Malga Gurndin via Corno Bianco

The Malga Laner—Malga Gurndin via Corno Bianco trek is a long enough route for those who have already descended the canyon but who also want to see its beautiful surroundings. These summits and destinations are just as worthy of your attention as the gorge.

On this particular route, you will pass between the two alpine farms: Malga Laner and Malga Gurndin via the main summit of the geopark. It is a loop trail, so it allows you to return to the starting point, which is great if you’re traveling by car.

 alpine farms, Bletterbach Geopark, Italy

From the summit of Corno Bianco, you will have panoramic views of the surrounding mountains and valleys: Monte Pausabella / Kaltherber (1,719 m / 5,639 ft), Ortles Alps (3,905 m / 12,812 ft) and Ötztal Alps (3,774 m / 12,381 ft), Schlern / Sciliar, Rosengarten / Catinaccio and Latemar groups in the Dolomites, Pala di Santa (2,488 m / 8,031 ft) across the Lavazè Pass (1,808 m / 5,931 ft), Brenta Dolomites, and other mountains.

  • Season: May 1 to November 1
  • Start and finish: Malga Laner / Malga Gurndin
  • Type of trail: Loop
  • Length: 11.9 km (7.3 mi)
  • Travel time: 5–6 h
  • Level of difficulty: Moderate
  • Elevation gain: 800 m (2,624 ft)

Hike to Corno Bianco from the Oclini Pass

This is an alternative route to Corno Bianco from Oclini Pass (Passo di Oclini). The route is suitable for those who are traveling to the pass from the Fiemme and Fassa Valleys and want to climb the mountain to get a closer look at the neighboring Corno Nero.

 Corno Bianco, Bletterbach Geopark, Italy

The climb of 330 m (984 ft) is suitable for families and new hikers. Additionally, you can return to the starting point by the same route, or continue to the canyon itself.

There is an option to increase the length of the route, too, going to Oclini Pass from the neighboring Lavazè Pass (1,808 m /5,931 ft) and Lavazè Plateau. In winter, this is also a popular cross-country skiing and snowshoeing route. Venturing to Oclini Pass is an additional 4.1 km (2.5 mi) in length, 1:30 hours of travel time, and 190 m (623 ft) of ascent.

  • Season: May 1 to November 1
  • Start and finish: Oclini Pass
  • Type of trail: Out-and-back.
  • Length: 4.9 km (2.5 mi) / 9 km (5.5 mi) from Lavazè Pass
  • Time: 2:45 h / 3:45 h
  • Level of difficulty: Easy
  • Elevation gain: 330 m (1,082 ft) / 520 m (1,706 ft)

Skiing in Corno Bianco and Corno Nero

In winter, Passo Oclini / Jochgrimm turns into a small ski resort. There are ski slopes on both peaks.

There are 4 ski slopes (two red: Doladizza and Weißhorn, and two blue: Schwarzhorn 1 and Schwarzhorn 2) with a total length of 7 km (4.3 mi) and 4 ski lifts. The elevations are between 1,850 and 2,250 m (6,069 and 7,381 ft) with a difference of 400 m (1,312 ft).

There is also a lot of space for cross-country skiing with trails of 3, 5, and 8 km (1.8, 3.1 and 4.9 mi) in length connecting Aldino / Aldein with Monte S. Pietro / Petersberg and Nova Ponente / Deutschnofen areas.

Check the official website of the Jochgrimm (Passo Oclini) Ski Resort.

Skiing, Bletterbach Geopark, Italy

Visitor Center and Museums

The Geoparc Bletterbach Visitor Center and GEOMuseum is the main starting point for your journey through the canyon. It is located just below Malga Lahner at the entrance of the Geological Trail of the Rio delle Foglie Gorge.

In particular, there are 16 information panels at the visitor center that tell about the different rock layers and other features of the gorge. If there is not enough information, or if you like to listen rather than read, ask one of the center’s staff for more information. You can also ask them for advice about hiking trails through and near the canyon.

Geoparc Bletterbach Visitor Centre and GEOMuseum

Lerch 40, 39040, Aldino, BZ, Italy

Opening hours: May 1 to November 1, daily from 9:30 am to 6:00 pm

Admission: €6 for adults and children over 14 years old (the price includes a visit to both museums and a free helmet rental for hiking in the canyon)




On your way back, you can also stop in Redagno, where the second museum of this kind is located. It contains all the important discoveries from the gorge that I listed above, as well as information about the region’s characteristic rocks.

Redagno GEOMuseum (Museo Geologico di Redagno)

Peter Rosegger Haus, 39040, Aldein / Radein, BZ, Italy

Opening hours: May 1 to November 1, daily from 9:30 am to 5:00 pm




hiking, Bletterbach Geopark, Italy

If you like interactive excursions, the geopark also offers guided walking tours of the canyon with local guides who will explain the geology, flora, and fauna of the area. Tours can be booked at the park visitor’s center or the museum in Redagno, or via email or a phone call. Information about the tours is as follows:

  • Schedule: Sundays at 10:30 am, from May 1 to October 31
  • Duration: 3.5 hours (from Aldino) and 4.5 hours (from Redagno)
  • Cost: adults €14, family tickets €32, plus entrance fees.
  • Language: German / Italian, guided tours in English upon request


There are not many mountain huts (rifugios) in the UNESCO World Heritage Geoparc Bletterbach, but you can find at least one on the Passo Oclini / Jochgrimm. It is a typical alpine hut run by a local family where you can have a half-board for about €38:

Rifugio Gurndin (1,989 m / ft)

Jochgrimm, 4, 39040, Aldino, BZ, Italy




On the same pass, there are a lot of other accommodation options such as other alpine huts, hotels, farms, and so on. For example: Hotel Schwarzhorn, Berghotel, Malga Isi / Doladizza Mountain Lodge, and others. There are many hotels in Aldino, too, and in the surrounding areas.

Major Cities and Resorts

Aldino / Aldein, a small Tyrolean village, located at an elevation of 1,225 m (4,019 ft), is the nearest settlement to the Bletterbach Geopark. It is only 20 minutes away, and it is located only 15 km (9 mi) to the south of the city of Bolzano.

The village is also often called Aldein-Radein / Aldino-Redagno. The second word in the name (Radein/Redagno) is that of the only hamlet in the municipality.

Aldino is home to 1,648 inhabitants (2020) in an area of 62.69 sq. km (24.2 sq. mi). It is one of the oldest and most important settlements in South Tyrol, and it was first mentioned in written texts in 1175.

However, according to the 2011 census, 98% of residents speak German, 1.7% Italian, and 0.1% Ladin, so it is mostly a German-speaking place. However, you shouldn’t have communication problems with locals, at least if the purpose of your visit is hiking in the park—there will be someone who knows some English.

Nova PonenteItaly

Nova PonenteItaly

The main architectural and cultural attraction of the town is the Parish Church of Aldein (Chiesa dell’Invenzione della Santa Croce), which was built before the twelfth century. The church is the main feature of the village because it is set amongst gorgeous meadows.

Inside the church, there are two important local works of art: the life-size statue of the Sacred Heart of Jesus, and the image of Moses with the Tablets of the Law.

Other attractions near the village you can visit during the day-trip:

  • Aldino Civil Museum (Museo Civico di Aldino)
  • The ruins of the old buildings of Leiterburg
  • The 1000-year-old cobbled road at the Karnol estate
  • Bridge over the Olmi / Holenbach River
  • Historic Hotel Zirmerhof in Redagno / Radein
  • Mills Museum (Museo dei Mulini)
  • Sanctuary of Pietralba in Nova Ponente

Official tourist site of Aldino / Aldein: Suedtirols-sueden.info.

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