Best mountain passes around Lake Bianco are centered around the Bernina Pass, a high-elevation route in the Swiss Alps. This area features Lago Bianco, a glacial lake known for its milky-whitish waters and its role in hydroelectric power. The pass is traversed by the UNESCO World Heritage-listed Bernina railway line and serves as a European watershed. The region offers dramatic alpine scenery, including views of glaciers and rugged peaks.
Last updated: July 3, 2026
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In winter there is hardly anyone there - you are wonderfully alone! With a bit of luck you will also be the first person to look for the snowy hiking trail 😊. An incredibly great region!
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Lago Bianco is a reservoir near the Bernina Pass and lies within the municipalities of Pontresina and Poschiavo. The lake is located directly at the pass summit at 2,234 meters above sea level. Lago Bianco is bordered by two dams on its north and south sides and is approximately three kilometers long and about 800 meters wide. At its maximum depth, Lago Bianco is over 50 meters deep. The reservoir on the Bernina Pass is fed by various mountain streams and glacial water, with the Cavagliasch stream flowing through the lake the most. The whitish, somewhat milky Lago Bianco gets its name (in German, "White Lake") from the inflow of sand and glacial water. On the western shore of Lago Bianco is the Bernina Hospice (Ospizio Bernina), and the Rhaetian Railway's train line – the Bernina Express – also runs directly along the shore. The Bernina Pass road is also located on the west side, although not directly on the lakeshore. In cold winters, the lake can freeze over, and in some years, beautiful black ice forms. Once the reservoir is opened by the authorities, nothing stands in the way of ice skating on Lago Bianco. Text / Source: Schweizersee.ch https://www.schweizersee.ch/lago_bianco_pontresina/
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Lago Bianco, Bernina Pass at 2234 meters The Lago Bianco is a reservoir at the Bernina Pass and is located in the area of the municipalities of Pontresina and Poschiavo. The lake is located directly at the pass at 2234 meters above sea level. The Lago Bianco is bordered by two dams on its north and south sides and is around three kilometers long and about 800m wide. When filled to its maximum, the depth of the Lago Bianco is over 50 meters. The reservoir on the Bernina Pass is fed by various mountain streams and glacier water, while the Cavagliasch in particular leaves the lake. The whitish, somewhat milky-looking Lago Bianco gets its name (in German "White Lake") from the inflow of sand and glacier water. The Bernina Hospice (Ospizio Bernina) is located on the western shore of Lago Bianco, and the Rhaetian Railway's train line - the Bernina Express - also runs directly along the shore. The Bernina Pass road is also located on the western side, but not directly on the lake shore. In cold winters, the lake can freeze over and in some years the beautiful black ice forms. When the reservoir is then opened by the authorities, nothing stands in the way of ice skating on Lago Bianco. Text / Source: Schweizersee.ch https://www.schweizersee.ch/lago_bianco_pontresina/
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The train station at 2,256 m is located just above Lago Bianco. With a bit of luck, you can also see special rail vehicles parked here.
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Reservoir at Bernina Pass between the Valposchiavo and the uppermost side valley of the Engadin. The reservoir at Bernina Pass is fed by glacial milk (silt-containing glacial water). This gives the lake its milky, whitish color. The Lago Bianco is also a watershed; the water flows eastward into the Black Sea and southward into the Adriatic Sea. The famous Bernina Express of the Rhaetian Railway, which is a UNESCO World Heritage site, winds along the shore.
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A sign indicates that the watershed is here.
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Beautiful trail over the Bernina Pass from Pontresina to Tirano
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The primary mountain pass in this region is the Bernina Pass, which is unique for several reasons. It's home to Lago Bianco, a striking glacial lake known for its milky-white waters and its position on a European watershed. The pass is also traversed by the UNESCO World Heritage-listed Bernina Railway Line, including the famous Bernina Express, offering unparalleled scenic journeys through the Alps.
The area around Lake Bianco and the Bernina Pass offers a variety of hiking trails, from easy walks to challenging high-alpine routes. You can find trails suitable for different skill levels, including an 8 km circular route around Lago Bianco. For more detailed options, explore our guide to Mountain Hikes around Lake Bianco, which includes routes like the difficult Diavolezza – Diavolezza Mountain Station loop.
Yes, the area offers family-friendly options. Lago Bianco itself is considered family-friendly, with accessible paths. The Ospizio Bernina Station, located directly on the pass, is a great starting point for easier walks and offers facilities. The Bernina Express train journey is also a memorable experience for all ages.
The best time to visit largely depends on your preferred activities. During summer (roughly June to September), the weather is ideal for hiking and cycling, with wildflower meadows in bloom. In winter, the landscape transforms into a wonderland, and Lago Bianco can freeze over, offering opportunities for ice skating in some years.
Beyond the stunning Lago Bianco itself, you can witness dramatic alpine scenery, including views of glaciers like Morteratsch and Palü, rugged peaks, and high-alpine environments. The unique milky-white color of the lake, caused by glacial meltwater, is a highlight. Don't miss the Watershed at Bernina Pass, where water flows to both the Adriatic and Black Seas.
Absolutely! The Bernina Pass region is popular for cycling. There are various routes available, catering to different difficulty levels. You can find options in our guide to Cycling around Lake Bianco, including challenging routes like the Bernina Pass – Pontresina Town Center loop, and more moderate options like the Lej Nair – Lago Bianco loop. There are also traffic-free bike rides available.
Lago Bianco, meaning 'White Lake,' gets its distinctive milky-white or sometimes turquoise color from glacial meltwater. This 'glacial milk' contains fine rock flour (silt) from the glaciers, which remains suspended in the water and reflects sunlight, giving the lake its unique appearance.
Yes, the Bernina Pass has significant historical importance. It has served as a crucial trade route across the Alps since the Middle Ages, connecting the Engadin valley with the Val Poschiavo and extending towards Italy. The current road was largely completed in 1865, building on centuries of passage.
The Ospizio Bernina Station, located at 2,253 meters directly on the pass and next to Lago Bianco, offers accommodation and a small bistro where you can find refreshments. It's a convenient stop for travelers and hikers.
The Watershed at Bernina Pass is a fascinating natural phenomenon. Lago Bianco is uniquely positioned on a European watershed. Water flowing south from the lake eventually reaches the Adriatic Sea, while nearby Lej Nair drains north towards the Black Sea. A sign indicates this significant geographical point.
Yes, there is a popular circular route around Lago Bianco itself, which is approximately 8 km long. This walk offers stunning views of the lake and surrounding alpine landscape and is suitable for various fitness levels.
Visiting in winter offers a completely different, magical experience. The landscape transforms into a frozen wonderland. While some trails may be inaccessible or require special equipment, Lago Bianco can freeze over, allowing for ice skating in certain conditions. The Bernina Express also operates year-round, providing a unique way to experience the snowy passes.


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