Côte d'Argent, Atlantic seaside resort in Nouvelle-Aquitaine, France.

The Côte d'Argent is an Atlantic seaside resort in Nouvelle-Aquitaine, France, stretching over a long coastline with sandy beaches and dunes. The beach runs almost without interruption along the Atlantic coast and is backed by pine forests inland.

The coast was developed toward the end of the 19th century, when railway lines connected major cities with beach resorts. New hotels and villas emerged along the coast in the following decades to host visitors.

The name was coined in 1905 by journalist and poet Maurice Martin, inspired by the silver reflections on the Atlantic surface; the Congrès national des sociétés de géographie approved it in 1907. Mimizan is nicknamed the "Pearl of the Côte d'Argent". A local rolled cake, also called Côte d'Argent, was created by André Carrau from génoise, Italian meringue, rum cream and pine nuts.

Along the coast there are many access points to the beaches, some leading through the dunes via wooden walkways. During summer months lifeguards are on duty at several spots, and parking areas are usually located close to the water.

At some spots, submerged forests emerge from the sand at low tide, remains of old pine forests that the sea flooded centuries ago. These petrified tree stumps then rise among the waves and form an odd sight along the waterline.