The Asseltse Plassen are a collection of lakes located in Asselt, within the municipality of Roermond in the Dutch province of Limburg. The lakes were formed through gravel extraction and together encompass approximately 150 hectares of open water, with an additional 50 hectares of surrounding natural habitat. The area sits at roughly 51°13′N, 6°00′E.

The character of the Asseltse Plassen is defined by small islands, varied and irregular shorelines, extensive reed beds, and willow thickets that have grown in along portions of the banks. In some areas, the vegetation has developed in a way that allows paddlers to navigate directly through the willow bushes by canoe, offering a distinctly different perspective on the landscape than what is visible from shore. The lakes are notably rich in dragonfly species, with 29 species recorded on site.

Paddling is explicitly permitted on the Asseltse Plassen, and Canadian canoes are available locally for those who wish to explore the water. The area also accommodates sailing, surfing, rowing, and diving, so paddlers should be aware of sharing the water with other users. A marina is present, and there are jetties available for visitors. Parking is available on site, and the lakes are accessible by bicycle as well as by car.

Several café-restaurants are located near the lakes, with terraces overlooking the marina and the water. Walking routes in the area include the Normannenroute along the lakeshores, and the Swalmdalroute cycling path passes by the lakes as well. Across the Maas in Buggenum, the Village Walk Buggenum also provides views of the Asseltse Plassen and the river.

Fishing is permitted on the lakes, with species including northern pike, zander, common bream, and European perch recorded by anglers. The overall atmosphere of the area is described as quiet and recreational, oriented toward low-intensity outdoor use.