Port de Larros, Fishing port in Gujan-Mestras, France.

Port de Larros is a small harbour on the Arcachon Bay shore at Gujan-Mestras, about 1.1 km from the town centre. It lies barely a metre above sea level, with low wooded rises and pine woods around the basin. The site is a landing and working point for the bay's oyster farms rather than a deep-water anchorage.

The port emerged in the 19th century as oyster farming became the region's main economic activity. The Dubourdieu shipyard contributed to its development by building traditional fishing vessels.

Port de Larros lies about 1.1 km from Gujan-Mestras, on the northeastern side of Arcachon Bay, and takes its name from the Larros district. The wooden cabins along the quay are working oyster-farming huts, where producers sort and sell their catch directly. The surrounding land is wooded, and the bay's mild climate has long supported this trade.

The port is freely accessible during daylight hours and offers direct tasting from producers at their waterfront cabins. Visitors should wear sturdy shoes, as piers and pathways can be slippery.

Traditional pinasse boats were built here for many years and remain a symbol of local craftsmanship. Some of these wooden vessels were constructed using methods passed down for centuries.