Jachthaven De Driesen is a marina located on the western shore of the Mookerplas in the village of Middelaar.

Situated within a nature reserve known for sandy beaches and clear water, it serves as a natural access point to the waterways of Noord-Limburg, Zuid-Gelderland, and Oost-Brabant.

Two watersport associations and a student sailing club are based on the grounds, and a foundation manages the site, keeping berthing rates relatively low.

The marina accommodates both permanent berths and visiting boats, and also offers campervan pitches at the water's edge. It lies within a five-minute walk of the Mookerheide, a heathland nature area with forests and a notable history.