The IJsselmeer is the largest lake in the Netherlands, covering over 1,000 square kilometers. It occupies the southern portion of the former Zuiderzee, a saltwater inlet that was enclosed by the Afsluitdijk dam in the early 20th century and subsequently converted to freshwater. The Afsluitdijk forms the lake's northern boundary, separating it from the Wadden Sea, while the Houtribdijk (also known as the Markerwaarddijk) forms its southern boundary, dividing it from the Markermeer. The lake is bordered by the provinces of North Holland, Flevoland, and Friesland.

Given its size and open exposure, the IJsselmeer is subject to significant wind and wave action, which is a primary safety consideration for any paddler venturing onto the water. Conditions can change quickly on such a large, shallow lake, and the open expanses between harbor towns leave little shelter. Paddlers should exercise caution and monitor weather carefully before setting out.

The shoreline is dotted with historic harbor towns that reflect the region's maritime heritage from the Zuiderzee era. Towns such as Medemblik and Den Oever on the northwestern shore offer marina facilities including restrooms and provisioning options. Lelystad, on the Flevoland shore, also provides marina access and serves as a common starting point for water-based trips on the lake.

The lake supports notable wildlife, including migratory fish species such as eels and salmon, which now have access to a dedicated fish migration channel constructed as part of the Afsluitdijk renovation project. This artificial channel, over a kilometer long, connects the lake to the sea and has been designed to help restore the ecological balance of the IJsselmeer.

From the IJsselmeer, paddlers with appropriate skills and planning can connect to the Frisian lakes to the northeast, and the broader Dutch waterway network. The Houtribdijk locks at Lelystad provide a passage between the IJsselmeer and the Markermeer for those wishing to explore both bodies of water.