Watersportvereniging De Peiler is a member-run sailing club and marina situated in a former sand pit on the south bank of the Lek, roughly 3 km west of the old town of Vianen.

The surrounding landscape is the Vijfheerenlanden polder, characterized by meadows, dikes, ditches, and small villages. The marina offers 220 berths accommodating vessels from 5 to 25 meters, with nearly all permanent spots reserved for members.

Transient visitors are welcome and benefit from a well-positioned stopover between the Beatrix locks and onward destinations such as Rotterdam, Arnhem, Tiel, or Nijmegen.

Electrical connections, drinking water taps on each jetty, and a dirty-water collection station are available. A boat ramp is on site but may only be used at high tide and requires prior coordination with the harbormaster.