De Gijster is a lake situated within the Biesbosch National Park in the Netherlands, a remarkable freshwater wetland system of international ecological significance. Nestled among the interconnected lakes and waterways of the Biesbosch, De Gijster offers anglers access to a dynamic and biologically rich environment shaped by the natural processes of one of Western Europe's most important freshwater tidal areas. The lake is part of a broader network of water bodies within the national park, making it a destination where fishing takes place against a backdrop of exceptional natural beauty and ongoing ecological research.