Schluchsee

Schluchsee. It is the largest lake by surface area in the Black Forest and the highest reservoir of its kind in Germany. Created by damming the Schwarza river, it forms a central part of the Schluchseewerk hydroelectric power system. The lake and its surrounding municipality are a major year-round destination for tourism and outdoor sports within the Southern Black Forest Nature Park.

Geography

The lake is situated on the eastern edge of the high Black Forest, within the district of Breisgau-Hochschwarzwald. Its basin was formed by glacial activity during the Würm glaciation, later modified for hydroelectric use. The primary inflow and outflow is the Schwarza, a tributary of the Wutach. The surrounding landscape is characterized by dense spruce and fir forests, rolling pastures, and peaks such as the Riesenbühl. The region experiences a typical Central Uplands climate with cool temperatures and significant snowfall in winter, influencing both its ecology and recreational use.

History

The natural lake was significantly altered in the early 20th century as part of a major energy project. Between 1929 and 1932, the Schluchseewerk company, a precursor to today's EnBW, constructed a dam, raising the water level by over 30 meters and submerging the original village of Alt-Schluchsee. This expansion created the modern reservoir to provide peak load power and regulate water flow for downstream stations like the Witznau Power Station. The project was a significant feat of Weimar Republic engineering, though later associated with the economic policies of the Third Reich. Post-World War II, it became integral to the West German power grid and later the development of regional tourism.

Tourism and Recreation

As a premier resort area, the lake offers extensive activities including sailing, windsurfing, and stand-up paddleboarding in summer, with equipment available from local clubs like the Segelclub Schluchsee. A 18-kilometer circular trail, the Seerundweg, is popular for hiking and cycling. In winter, the area transforms into a hub for cross-country skiing on groomed trails and ice skating when conditions permit. Key attractions include the Aqua Fun Schluchsee indoor pool complex, boat tours on the passenger ship St. Nikolaus, and proximity to the Feldberg, the highest peak in the Black Forest. Annual events such as the Schluchseelauf running race draw significant crowds.

Infrastructure

The lake is accessible via the Bundesstraße 500 (Black Forest High Road) and is served by the Höllentalbahn railway line, with stops at Schluchsee and Seebrugg stations. The dam itself is a curved gravity dam made of concrete, featuring a controlled spillway. The municipality of Schluchsee provides essential services, with dispersed settlements like Aha and Fischbach around the shoreline. Utilities are managed by the Schluchseewerk and regional providers, ensuring stable power and water supply for both residents and the tourist industry.

Economy

The local economy is predominantly driven by tourism, supporting numerous hotels, guesthouses, and restaurants such as the historic Hotel Hubertus. The Schluchseewerk remains a major employer and a key component of the EnBW renewable energy portfolio, utilizing the Hornberg Basin for pumped-storage hydroelectricity. Additional economic activities include forestry under the management of the Forstamt St. Blasien, small-scale agriculture, and craft industries. The municipality collaborates with neighboring towns like St. Blasien and Titisee-Neustadt to promote the broader Hochschwarzwald region.