The river walk along the Ulla River is a route located at the mouth of the ría de Arousa, where the salty waters penetrate the land, meandering through the reeds. 

It starts at an old tide mill, known locally as muíño do Cura, located at the mouth of the Catoira River and which was in operation until the beginning of the 20th century. Tide mills are those that use tidal power to move their millstone and, although this one is in a state of significant deterioration, it is still of great heritage value, as it is one of the few surviving examples of this type of construction. 

The path runs along the banks of the Ulla River, next to the river beach, and then crosses an area of “brañas” that belongs to the Rede Natura 2000 until it reaches the Torres de Oeste. This important medieval fortress, declared a Historic-Artistic Monument in 1931, was built in the 12th century by order of Archbishop Gelmirez to close off the Viking and Saracen incursions that sought to reach Compostela. In 1719 they also protected the port of Padrón against English attacks. A dirt road and wooden walkways will take us to the border with the municipality of Valga, where we round off this walk that allows us to cover on foot a section of the Way of St. James known as the Sea of Arousa and River Ulla Route, following the route that tradition assigns to the arrival of the body of the apostle St. James in Galicia.