Ria de Foz - Masma

Ría de Foz-Masma is a broad estuary where the Masma River meets the Cantabrian Sea, straddling the coastal municipalities of Foz and Barreiros and the inland municipalities of Mondoñedo and Lourenzá, in the Lugo province region known as A Mariña. It ranks among the most valuable natural sites on the Galician coast — a wetland complex covering over 640 hectares, protected as part of the Natura 2000 network (both a Site of Community Importance and a Special Protection Area for Birds) and also listed within Galicia's own network of protected areas and the IBA (Important Bird Areas) catalogue.

Where does this estuary come from?

The Masma River rises in the Xistral mountains at around 920 metres above sea level and, after a course of more than 46 kilometres, reaches the coast, forming a wide estuary with calm waters. The Altar beach and Foz's A Rapadoira beach shelter the ría from the open sea, making its inner waters noticeably quieter and shallower than the exposed Cantabrian coastline nearby. This sheltered setting allows silt and sand to settle, gradually shaping extensive shallows, dunes and wetland areas — a mosaic of habitats typical of river mouths along Spain's Atlantic coast.

Why is this place so important for birds?

Ría de Foz-Masma is best known as a haven for waterbirds. The Eurasian spoonbill (Platalea leucorodia) is a regular visitor here — a species arriving mainly from the Netherlands, whose presence gives the site international significance for conservation. Shallow waters, muddy inlets and bands of marsh vegetation create ideal feeding grounds for wading and water birds, both during migration and over the winter months.

What else sets the Masma River apart?

The river itself carries considerable ecological weight — it is one of the few rivers in Galicia where Atlantic salmon still spawn. The presence of this species, which depends on clean, well-oxygenated water, points to the good ecological health of the whole river basin and is one of the reasons the area received such extensive legal protection.

How can visitors explore the ría?

The surroundings of Ría de Foz-Masma are a popular destination for walking and birdwatching, with paths running along the estuary that let visitors take in the landscape without disturbing its delicate habitats. The site appeals both to keen birdwatchers and to anyone looking for a quiet stretch of nature between the towns of Foz and Mondoñedo.

Frequently asked questions

Where exactly is Ría de Foz-Masma located? On the coast of Lugo province in Galicia, between the municipalities of Foz and Barreiros and the inland towns of Mondoñedo and Lourenzá.

What protection status does the area hold? It forms part of the Natura 2000 network (Site of Community Importance and Special Protection Area for Birds) and Galicia's own protected areas network, covering more than 640 hectares in total.

What wildlife can be seen here? Mainly waterbirds, including the Eurasian spoonbill, along with Atlantic salmon in the Masma River itself — a species now rare in Galician waters.

Are there beaches nearby? Yes, the river mouth is sheltered by the Altar and A Rapadoira beaches in Foz.