Schledden like the Westerschledde are a special geological feature of the Haarstranges. Due to the karstified subsoil, dry valleys have formed here, which only carry water above ground in winter or after heavy rainfall.
The Westerschledde begins behind Langenstraße (Rüthen), north of the "Spitzen Warte" and flows into the Störmede stream after 15.3 km.
The nature reserve is approx. 365 hectares in size and impresses with the special characteristics of a historically evolved cultural landscape. The shaping power of flowing water and human management, especially centuries of grazing, have created a wild and romantic valley.
The oak and Buchenwald forests in the south still contain a rich herb layer in places and are the habitat of rare animal species. The calcareous grasslands in the central part of the area are relicts of former extensive grazing. This type of vegetation is one of the most species-rich communities in Central Europe. The open valley areas are the habitat of numerous dragonflies, butterflies and bird species.
The shallow chalky soils are home to highly endangered wild herbs. Marginal strips have been created to protect them, where fertilizers and herbicides are not used.
Local authorities and conservationists are trying to preserve the open character of the Westerschledde valley through targeted maintenance measures and grazing with sheep.