Black Lake is at the heart of the Ballons des Vosges Regional Nature Park. Of glacial origin, it extends inside a granite cove and sits at an altitude of 3,067 ft (935 m). Its water's floor, consisting of black peat bogs, gives it its dark appearance. The lake is classified as a protected site by Natura 2000 that aims to ensure the conservation of its habitats, fauna, and flora. More than 70 bird species have been identified around its waters, such as the western capercaillie (Tetrao urogallus). The area is also home to numerous mammals like chamois, wild boars, deers, foxes, martens, or lynx.