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Home -> Green Spaces -> Ulla-Deza River System

Ulla-Deza River System

The Ulla is the third longest river in Galicia after the Miño and the Sil. Even its estuary in the Ría de Arosa becomes a rich natural corridor that receives contributions from a dense network of tributaries such as the river Sar, sung about by Rosalia de Castro, and the Deza. Precisely in one of the tributaries of the latter lies the River Toxa waterfall. A beautiful footpath connects the waterfall, in the hamlet of Pazos, with the Monastery of Carboeiro. The hardness of the stone at this site results in one of the most spectacular falls in Galicia with a steady mist in the air. Amongst all that green, the moss does not mislead. If water is life, then the Toxa waterfall embodies the joy of living.

  • Biodiversity
  • Hiking

As for the flora in the Deza, there is varied riverside woodland which is well maintained. Dominated by Alder (Alnusglutinosa), Willow (Salix atrocinerea) and Narrow Leaved Ash (fraxinusangustifolia) that incorporates, among other species, Oak (quercusrobur), Pyrenean Oak (quercuspyrenaica), holly (Ilex aquifolium), Galician-oak, Portuguese Alder and Buckthorn (rhamnusfranguía).

In the case of wildlife, both rivers have an important fish population in addition to the estuary related species such as Atlantic salmon (Salmosalar) and sea lamprey (Petromyzonmarinus), also worth highlighting are the trout, Carp (cyprinids) and the Iberian Nase (Pseudochondrostomapolylepis) as well as the freshwater mussel.

In the stretch of the Deza River which defines Silleda, it is interesting to visit the medieval Bridge at Taboada, along the Via da Prata, the surroundings of Carboeiro Monastery, the Toxa waterfall and the mouth of the river Deza where it joins the Ulla, in the parish of Cira.

There is clearly marked for the delight of visitors a path connecting the Toxa Waterfall with Carboeiro Monastery.

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Site of Community Importance (SCI)

In the council of Silleda this system fully recognizes the length of the River Deza as it travels through the municipality from south to north and in the east forming a natural border with the councils of Lalín and Vila de Cruces until  the mouth of the river Ulla, in the parish of Cira.

Surface area
1.153 Ha.


Equipment: Lightweight mountain boots, rain coat depending on the season, route map, water bottle, a camera, light and comfortable clothing.

This route can be done as a round trip, but it is advisable to follow the path as marked to avoid getting lost. In this case call the following numbers: 660 663 145 or 660 664 809 (Civil Protection)