Lakes in Blenio offer diverse alpine aquatic landscapes within the Ticino canton of Switzerland. The region features a mix of natural and artificial lakes, often nestled amidst rugged peaks and high-altitude valleys. These bodies of water serve as focal points for various outdoor activities, including hiking and exploration. The Blenio Valley is characterized by its mountainous terrain and serene natural settings.
Last updated: May 15, 2026
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Hiking in Blenio
MTB Trails in Blenio
Cycling in Blenio
Running Trails in Blenio
The tunnel is over 800 meters long. A narrow footpath runs alongside the narrow road through the tunnel. The tunnel is well lit, so a flashlight or headlamp isn't necessary.
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Scenic pass that is opened all year round (closes at 6pm in winter). There is hardly any traffic which makes cycling very nice and plenty of opportunities to take pictures. We crossed the pass in early May when there was still plenty of snow up there. The change in scenery where it was all green at Disentis and slowly turning white as we climbed higher... and very quickly turned to green as we rolled down on the south side to Biasca was breathtaking.
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The Lucomagno is one of the most famous Alpine passes in Switzerland. It is located between the cantons of Ticino and Grisons, at an altitude of 1,926 meters. The name seems to derive from the Latin "locus magnus", meaning "large, open place". It is often tackled in the professional race of the Tour of Switzerland.
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Lake Carassina is an artificial lake at 1,705 meters above sea level in a side valley of the Blenio. It is fed by various mountain streams and exploited to produce hydroelectric energy. The scenery of the surrounding mountains is breathtaking.
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Lake Luzzone is located in the upper Blenio valley at 1590 meters above sea level. It is an artificial basin originating from a 225 meter high dam and completed in 1963.
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Lake Retico is a small alpine basin nestled between Val Cristallina and Val Bovarina.
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The Val Malvaglia dam creates a large water basin that communicates with the Biasca power plant below, the most powerful in Ticino and among the most important in Switzerland
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The Blenio Valley offers several notable lakes. Lago di Luzzone and Luzzone Dam is famous for its impressive dam and unique climbing wall. Lake Retico is a beautiful alpine basin known for its colors and rewarding hikes. Additionally, Lago Ritom, though primarily in Val Piora, is a significant mountain lake connected by hiking routes.
Yes, several lakes offer family-friendly experiences. Lago di Tom, for instance, is part of a popular '3-lakes excursion' that is considered family-friendly and features a white sandy beach. The didactic trail along the right bank of Lago Ritom is also suitable for visitors of all ages.
The lakes in Blenio are excellent starting points for various outdoor activities. You can enjoy extensive hiking, with options ranging from moderate to difficult, such as the Pizzo dell'Uomo Circuit or the Crio High Trail. Road cycling and touring bicycle routes are also popular, including challenging rides like the Blenio - Lucomagno Route or the Luzzone Dam and Adula Hut Loop. For more details on routes, visit the Hiking in Blenio, Road Cycling Routes in Blenio, and Cycling in Blenio guides.
For experienced trekkers, the area around Lake Retico provides demanding ascents to peaks like Cima della Bianca and Scopi. Laghetto dei Cadabi, situated at Passo del Laghetto, also offers challenging but rewarding hikes from Val Malvaglia or Capanna Adula UTOE, with panoramic views from Cima del Laghetto.
The lakes boast diverse natural features. Lake Retico is known for its majestic beauty and infinite colors, often with crystalline snow patches. Lago di Tom features a magnificent small beach with white sand, giving it a Caribbean-like appearance. Laghetto dei Cadabi is a glacial lake surrounded by unique geological formations of black Bündnerschiefer and light limestone slate.
Access to some lakes is possible via public transport. For example, Lago Ritom is accessible by car or via the famously steep Piotta-Ritom funicular. For other lakes, public transport might get you to a nearby village, requiring a hike or further travel to reach the lake itself.
The best time to visit the lakes in the Blenio Valley is generally during the warmer months, from late spring to early autumn (May to October), when hiking trails are clear of snow and the weather is most favorable for outdoor activities. Some high-altitude lakes may retain snow patches well into summer.
Lago di Tom, with its clear blue waters and white sandy beach, is a popular spot for swimming and relaxation on warm days. While not explicitly designated for wild swimming, its natural setting makes it appealing for those looking to take a dip.
Lago di Luzzone and Luzzone Dam is unique because its 225-meter-high dam wall is home to the world's tallest artificial climbing wall. This impressive structure, equipped with over 600 resin holds, offers a distinct challenge for experienced climbers, making it a significant landmark in the Blenio Valley.
While direct accommodation on the immediate shores of all lakes might be limited, the Capanna Bovarina (1870 m) near Lake Retico offers an option for overnight stays. The Blenio Valley itself has various villages with accommodation, cafes, and restaurants. It's advisable to check specific locations for facilities near your chosen lake.
Lago Ritom is the largest mountain lake in the Canton Ticino, with a surface area of 1.49 km². Although primarily located in Val Piora, it is significantly connected to the Blenio Valley through various hiking routes, particularly those traversing the Lukmanier Pass.
For summer hiking around the Blenio lakes, it's recommended to bring appropriate hiking footwear, layers of clothing for changing mountain weather, sun protection (hat, sunglasses, sunscreen), sufficient water and snacks, a map or GPS device, and a first-aid kit. Depending on the trail, trekking poles can also be beneficial.


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Still not found your perfect lake in Blenio? Check out the guides of these regions to see even more beautiful places.