The lake was constructed in 1954 primarily to regulate the flow of the Thur River and prevent seasonal flooding.
The ruins of the 14th-century Wildenstein Castle, built by the counts of Ferrette, overlook the lake from a cliffside position.
The dam structure is a gravity dam made of concrete, reflecting mid-20th-century French industrial engineering.
The lake serves as a primary water storage facility for the hydroelectric power station located downstream in Kruth.
The surrounding landscape contains remnants of the medieval salt route that once traversed the Vosges mountains.
Lac de Kruth-Wildenstein is an artificial mountain lake created by a 35-meter high dam on the Thur River in the Vosges Mountains. The reservoir covers approximately 30 hectares and serves as a primary site for water-based recreation in the Haut-Rhin department. Visitors access the lake via the D13b road, which provides direct views of the surrounding forest and the ruins of the nearby Wildenstein Castle. The water depth fluctuates significantly due to its function as a hydroelectric reservoir managed by Électricité de France. Swimming is officially permitted in designated areas during the summer season under lifeguard supervision. The site is part of the Ballons des Vosges Regional Natural Park, characterized by granite terrain and glacial valleys.
The viewpoint near the dam crest looking back toward the forested slopes of the Vosges.
Bring water shoes as the lake shoreline can be rocky.
Check local weather forecasts specifically for the Vosges peaks, as conditions change rapidly compared to the valley floor.
Plan to visit on weekdays to avoid heavy weekend traffic from regional visitors.
Attempting to swim in non-designated areas, which can be dangerous due to underwater currents and fluctuating water levels.
Lifeguards are only present during the peak summer months; the site is otherwise open year-round for hiking.
Strictly follow the designated swimming zones; do not swim near the dam infrastructure or spillways.
