Jachthaven De Stuw is a marina situated at the mouth of the Valleikanaal where it meets the river de Eem, close to the center of Amersfoort.

The site features historic wooden buildings with white window frames, roughly a century old, that once served as timber storage and were later repurposed as boat storage facilities.

The de Eem itself is notable as the only waterway in the Netherlands that both originates and ends within the country without branching off from another river. From the marina, boaters can travel through the scenic Eempolders landscape to reach the randmeren.

The harbor holds around 30 permanent berths and offers amenities including a boat crane, a slipway, shore power, drinking water, parking, and winter storage.