Lac d'Hossegor, Marine lake in Soorts-Hossegor, France

Lac d'Hossegor is a marine lake in Soorts-Hossegor, Landes, connected to the Atlantic through the Canal d'Hossegor and the Boucarot pass. It is roughly rectangular, oriented north-south, up to 2,300 m long and 300 m wide. With the tides the lake empties almost completely before filling again. Its far shore is lined with dark green trees and low pale-walled buildings with dark or reddish roofs.

In the 1920s, the first villas were built along the shores and the area began drawing visitors seeking the coast during summer. Decades later, when surfing spread along the Atlantic coast, Hossegor became one of the main hubs for the sport in France.

The lake gave its name to the commune, which added "Hossegor" to its original name "Soorts" in 1913. Oyster farming installations sit on the water, and the oysters produced here are part of the gastronomy of the Landes. Several restaurants in the southeast serve them.

Several supervised swimming areas are set up along the shores in summer, and footpaths run all the way around the water for walking or cycling. Equipment rentals for sailing and water sports are available at a few spots near the lake.

The lake is a remnant of the old Adour estuary, which was moved from Capbreton to Bayonne. Its link to the sea is the Canal d'Hossegor, decreed by Napoleon III at Biarritz on 12 October 1868; work began in 1869, paused during the war of 1870, and the channel was finished on 11 March 1876 by a strong tide combined with a storm.