Best attractions and places to see in Biotop Kalterer See - Biotopo Lago Di Caldaro include the largest natural lake in South Tyrol, known for its warm waters and diverse ecosystem. This region, also referred to as Lake Kaltern or Lago di Caldaro, is characterized by picturesque vineyards and orchards. It features a protected reed belt, which serves as a vital habitat for numerous species of birds, fish, and amphibians. The area offers a blend of natural beauty and cultural heritage, including its winemaking tradition.
Last updated: May 25, 2026
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Cycling in Biotop Kalterer See - Biotopo Lago Di Caldaro
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Today, Lake Kaltern is heavily influenced by humans: especially on the west and east banks, there are bathing establishments, campsites, restaurants and commercially used areas that lead to a burden on the natural environment. This makes this quiet zone on the south bank all the more important. It is a nature conservation project in which two ponds and bays were built in the reeds. These are intended to provide new habitats and nesting places for water birds and spawning grounds for fish. Source: https://www.kalterersee.com/de/highlights/natur-landschaft/der-kalterer-see/biotop/
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This extensive reed belt on the southern shore of the lake provides shelter, food, spawning, resting and breeding grounds for aquatic insects and birds, amphibians and fish. Scientists have counted over 100 species of birds in this wetland, including many migratory birds. Source: https://www.kalterersee.com/de/highlights/natur-landschaft/der-kalterer-see/biotop/
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This reed area is the only large habitat of this type between the Reschen Pass and Verona and is located at the fork of the most important bird flight routes. This is why fish and purple herons, ruffs, snipes, lapwings, black terns, ospreys, cranes, cormorants and white storks appear here again and again. Source: https://www.kaltern.com/de/biotop-kalterer-see.html
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When the weather is nice, Lake Kaltern is a great destination for the whole family. In addition to swimming and pedal boating, you can also play a round of mini golf.
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The path around the lake is 7.5 km long and you should plan on between 2 and 3 hours. Along the way you will learn a lot about the country, the people, the origins, location and cultivation of this unique landscape and about Lake Kaltern. On the east bank the lake is bordered by the Mitterberg nature reserve, on the west bank the Mendel Mountains rise and in the south there is the wetland biotope with small lakes and a viewing platform from which you can observe the diverse bird life. On the north bank there is a hotel with a lakeside terrace, a lido, a campsite and a rental shop for sailing boats, pedal boats and SUP.
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A wonderful view of Lake Kaltern, "great colors - great lights" and a fantastic mountain backdrop. A really great tour through a wonderful landscape.
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The region is centered around Lake Kaltern, the largest natural lake in South Tyrol. A significant feature is the protected reed belt at the southern end of the lake, which forms the Kalterer Lake biotope. This area is a vital habitat for numerous species of fish, amphibians, water insects, and over 100 species of birds. You can also explore the Frog pond, water turtle footbridge - Kaltern biotope, which is part of the largest preserved wetland area between the Po Valley and the main Alpine ridge.
Lake Kaltern is renowned as the warmest bathing lake in the Alps, with summer water temperatures reaching up to 28°C. This makes it ideal for swimming, surfing, sailing, and stand-up paddleboarding. The lake is beautifully framed by picturesque vineyards and apple orchards, offering a Mediterranean-like landscape for relaxation and activities.
The Kaltern biotope, particularly the reed area at the southern end of Lake Kaltern, is a prime spot for birdwatching. Over 100 species of birds, including fish and purple herons, ruffs, and white storks, use this area as a nesting place or stopover. You can observe these animals from the Birdwatching Tower at Lake Caldaro Nature Reserve, which also provides descriptions of the local birdlife.
Yes, the region features a unique phenomenon known as the 'Ice Holes' (Eislöcher) between Kaltern and Eppan. Here, cold air allows plants typically found at higher altitudes to thrive at a mere 500 meters above sea level. Additionally, the Spring Valley (Frühlingstal) between Montiggl and Lake Kaltern is famous for its stunning carpet of snowdrops in spring.
Around Lake Kaltern, popular activities include swimming, surfing, sailing, and stand-up paddleboarding in its warm waters. The scenic lakeside circuit is perfect for walking, hiking, and cycling. The surrounding vineyards also offer opportunities for cycling tours along the South Tyrolean Wine Road.
Yes, the area offers a variety of hiking trails. For easy walks, you can explore routes like the Lake Caldaro Circuit Trail. More moderate options include the Rastenbach Gorge Stairs route, which leads through a wild and romantic gorge. The nature adventure trail within the biotope is also a great option for a leisurely stroll.
Absolutely. A popular route for cycling is the scenic Lakeside Circuit around Lake Kaltern, which passes through protected wetlands and apple orchards. Additionally, the South Tyrolean Wine Road offers a dedicated wine & cycle route that winds through picturesque vineyards, providing an enjoyable way to explore the region's winemaking landscape.
Yes, the region boasts several historical and cultural sites. You can visit the ruins of Leuchtenburg Castle (Castelchiaro), which offers panoramic views high above the lake. The Mendel Funicular, once the steepest and longest electrically operated funicular in Europe, provides stunning views from the Mendelpass. The South Tyrolean Wine Museum in Caldaro offers insights into the region's rich winemaking tradition.
The Biotop Kalterer See is very family-friendly. The nature adventure trail within the biotope is particularly recommended for families with children, allowing them to observe frogs, amphibians, and even water turtles. The warm waters of Lake Kaltern are perfect for swimming, and the Birdwatching Tower provides an engaging experience for all ages to spot diverse birdlife.
The best time to visit depends on your interests. Spring is ideal for witnessing the beautiful carpet of snowdrops in the Spring Valley. For swimming and water sports, the summer months (May to September) are perfect due to the lake's warm temperatures. The region's pleasant climate and scenic beauty make it enjoyable throughout spring, summer, and early autumn for hiking and cycling.
The area around Lake Kaltern is well-suited for exploration by foot or bicycle, with a popular lakeside circuit. Public transport options are available to reach the biotope, and the Mendel Funicular offers a unique way to ascend to the Mendelpass for panoramic views.
There are parking facilities available around Lake Kaltern, particularly near the bathing establishments and access points to the biotope. These are generally well-maintained to accommodate visitors.
Yes, you'll find various cafes and restaurants located around Lake Kaltern, especially on the east and west banks. These establishments offer refreshments and dining options, often with scenic views of the lake and surrounding vineyards.


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