Lahn

The Lahn is a river in central Germany and a right-bank tributary of the Rhine. It is about 245 kilometers in length and flows through the states of Hesse and Rhineland-Palatinate, joining the Rhine near Koblenz at Niederlahnstein.

The Lahn rises in Hesse and travels generally northwest toward the Rhine. Along its course it passes several notable towns, including Marburg, Giessen, Wetzlar, Limburg an der Lahn, and Bad Ems, before reaching Koblenz. The Lahntal valley is a widely recognized geographic feature, characterized by a history-rich landscape with medieval towns and castles.

Historically, the Lahn provided avenues for timber rafting and local transport; in modern times, its navigation is limited to the lower reaches and it plays a significant role in recreation and tourism. The river corridor is popular for cycling and hiking, with the Lahn cycle route following parts of the valley and linking several towns.

Environmental and administrative aspects of the Lahn fall under German river management and EU water protection frameworks. Efforts have focused on flood management, water quality improvement, and habitat conservation in sections of the river and its floodplains. The Lahn remains an integral part of the regional landscape, contributing to local culture, economy, and outdoor recreation.