Jachthaven De Grote Wielen is a marina situated directly on the nature reserve De Groote Wielen, on the outskirts of Leeuwarden in Friesland.

The facility offers 135 permanent berths for sailboats, motorboats, and sloops, along with a 60-meter passantenkade accommodating up to 10 visiting boats. The grounds are secured with a barrier gate and 24/7 camera surveillance, with lighting throughout.

Visiting boaters can make use of electricity and water points on the docks, and a restaurant is located directly opposite the visitors' quay.

Boat rentals — including electric sloops, waterbikes, and SUP boards — are available on site, making the marina a practical base for exploring the surrounding Frisian waterways.