The Roer is a scenic river flowing through the Netherlands, best known in angling circles for its remarkable ecological restoration and the diversity of fish species it supports. Rising in the Eifel highlands of Germany and flowing northward to join the Maas near Roermond, the river passes through a variety of habitats ranging from fast-flowing gravel riffles to deeper, slower pools. Its character shifts considerably along its course, offering anglers a range of environments and target species. The Roer has been the focus of significant conservation investment, particularly aimed at restoring fish migration routes that had been blocked by weirs and other structures, making it one of the more ecologically dynamic rivers in the southern Netherlands.