Lac de Moiry
Wallis
Lac de Moiry is a high-altitude reservoir located in the municipality of Grimentz in the Swiss canton of Valais. Situated at an elevation of approximately 2,249 meters, the lake spans a surface area of 1.40 square kilometers and reaches a maximum depth of 120 meters. It is encircled by prominent alpine peaks including the Garde de Bordon (3,310 m), Corne de Sorebois (2,895 m), and Sasseneire (3,254 m), creating a breathtaking mountain landscape. The reservoir was created by the construction of a 148-meter-high dam, completed in 1958 and designed by Alfred Stucky. Lac de Moiry serves a critical role in hydroelectric power generation, feeding the Gougra power station with an annual output of 588 GWh, as well as other regional plants. The area is accessible via the Val d’Anniviers from Sierre, with Grimentz being the nearest larger village. Bus line 452 connects visitors to the dam and further up to Lac de Châteaupré. The site is popular among hikers, with national and local trails crossing the dam, offering spectacular views and an immersive alpine experience. Lac de Moiry combines natural beauty with engineering marvel, making it a unique destination in the Swiss Alps.
Plan your trip to Switzerland with AI
Create a detailed itinerary in minutes. AI suggests the best places, restaurants, and an optimized route.
Tip: The best time to visit Lac de Moiry is during the summer months when hiking trails are fully accessible and the weather is favorable. Visitors are advised to use public transport connections from Grimentz to reduce environmental impact and for convenience. Hiking routes such as the national Alpine Pass Route and local Tour du Lac de Moiry trail offer spectacular views and should be planned in advance. While entrance to the reservoir area is free, check local transport schedules and weather conditions before visiting. Early arrival is recommended to enjoy the peaceful surroundings and avoid crowds.
Interesting facts
- •The dam at Lac de Moiry is 148 meters high, making it one of the taller dams in Switzerland.
- •The reservoir lies at an altitude of 2,249 meters, placing it among the higher elevation lakes in the Alps.
- •Lac de Moiry supplies hydroelectric power to multiple plants, generating approximately 588 GWh annually.
- •The lake is surrounded by notable alpine peaks such as Garde de Bordon, Corne de Sorebois, and Sasseneire, which are popular among mountaineers and hikers.
History
The Lac de Moiry reservoir was established with the construction of the Moiry dam, completed in 1958.
The dam was designed by renowned Swiss engineer Alfred Stucky, marking a significant development in Swiss hydroelectric infrastructure.
Since its completion, the reservoir has been integral to regional power generation, supplying electricity to several power plants including the Gougra station.
Over the decades, Lac de Moiry has also become a valued recreational destination, blending technical achievement with natural alpine beauty.
Place Guide
Moiry Dam1958
An impressive 148-meter-high dam completed in 1958, designed by engineer Alfred Stucky. It forms the reservoir and is a key part of the region's hydroelectric power system.
Hiking Trails Around Lac de Moiry
The national Alpine Pass Route (No. 6) and the local Tour du Lac de Moiry (No. 221) hiking trails cross the dam and circle the reservoir, providing scenic routes for outdoor enthusiasts.
