Heisterberger Weiher, lake in Germany

Heisterberger Weiher is a man-made reservoir in the Westerwald region, situated on a high plateau at about 530 meters elevation. The water covers roughly 10 hectares and is surrounded by forested hills, open grassland, and simple walking paths that offer visitors multiple ways to explore the area.

The reservoir was constructed between 1707 and 1711 when a local ruler had a dam built to store water and breed fish. This body of water has shaped the landscape for over 300 years and continues to serve as a storage reservoir and recreation site for the region.

The lake is named after Heisterberg, the Driedorf village directly northwest of it. On the first Saturday of August the event "Heisterberger Weiher in Flammen" is held, when fireworks are set off over the water. The Westerwald-Steig long-distance trail runs along the northern shore, and the Lahn-Dill-Kreis operates the Jugendfreizeitheim Heisterberg with 114 beds beside the lake.

The lake lies about 500 m north of Bundesstraße 255, reached via the K 83 turning north toward Heisterberg; the Westerwald-Steig long-distance trail runs along its north shore. The south shore holds a large lawn, a volleyball field, a children's playground, a restaurant, boat rental and a year-round campsite. The Lahn-Dill-Kreis runs the Jugendfreizeitheim Heisterberg with 114 beds, and the Driedorf community laid out the MTB BikePark at the Höllkopf.

Each August, the festival 'Heisterberger Weiher in Flammen' takes place, where the lake is illuminated at night by a spectacular fireworks display. This yearly event draws many visitors who come to watch the water light up in colorful reflections.