Riera of Argentona Nature · Argentona, Maresme, Barcelona The riera d'Argentona is a watercourse about 10 kilometres long that flows through the Maresme comarca, in Barcelona, and forms the green axis of the town. It rises in the municipality of Dosrius, at an altitude of 133 metres, at the confluence of the riera de Canyamars and the riera del Far, a stretch known as the riera de Dosrius. It crosses the municipalities of Dosrius and Argentona parallel to the C-60 highway, and its lower course marks the boundary between Mataró and Argentona before flowing into the Mediterranean near Mataró. It is a stream of irregular flow, typical of the Maresme, which receives tributaries such as the riera del Far, the riera de Canyamars, the riera d'Òrrius and the riera de Clarà. In Roman times, the valley it runs through was a communication route between the Maresme and the Vallès. Photo: No machine-readable author provided. 1997 assumed (based on copyright claims). (CC BY-SA 3.0) What to see and do in Argentona