Freudensee, Reservoir in Hauzenberg, Passau district, Bavaria, Germany

Freudensee is a reservoir near Hauzenberg in the Passau district of Bavaria that stores water for nearby areas. The lake spreads out peacefully with natural shorelines, surrounded by gentle hills and forested land, with a 1.6 kilometer walking trail that circles the entire water.

The lake was created as a reservoir for a hammer forge authorised in 1589, and was first called Hammerweiher after that forge. When the forge closed in the 1970s, the water was redirected to a small turbine that still generates electricity. The pond lies at 469 m above sea level and holds about 140,000 cubic metres of water.

The lake's earlier name, Hammerweiher, comes from the hammer forge approved in 1589, whose hammers were driven by its water. The forge closed in the 1970s, and the outflow now runs a small turbine that generates electricity. Above the lake stands Burg Freudensee, and a 1.65 km loop path serves joggers and walkers in summer and winter.

A 1.65-kilometre circular path runs around the lake, used by joggers and walkers in both summer and winter. The lake and its surroundings lie within the 12.8-hectare protected landscape area Schutz des Freudensees und von Landschaftsteilen um den Freudensee. Burg Freudensee stands above the water.

The lake was dammed in the 19th century to drive the hammers of a smithy authorised in 1589, which gave it the earlier name Hammerweiher. After the forge closed in the 1970s, a small turbine took over the outflow and still generates electricity. Above the water stands Burg Freudensee, and the lake with its surroundings forms a 12.8-hectare protected landscape.