The stretch of the Lahn around Weilburg is one of the most popular canoe and kayak runs in central Germany, and the town sits at its scenic peak — the river loops almost entirely around the old town hilltop before flowing on through the valley. Canoe rental is available locally, and the typical day paddle from Weilburg covers the meander and passes through the ship tunnel, which is walkable on foot but more interesting by water.
The Lahn is a gentle river suitable for beginners and families. The current is slow enough that paddlers of any experience level can manage it comfortably, and the scenery of wooded hillsides and the castle above is excellent. On summer weekends the water carries a steady procession of canoes and kayaks.
The Lahn Valley cycle path also follows the river and provides a good alternative for non-paddlers who want to explore the valley. Both the cycling and paddling options can be combined — canoe down, cycle back — with rental outfitters along the river offering shuttle services.