The Besòs River Park is a public space located along the last 9 kilometers of the Besòs riverbed, from the confluence with the Ripoll river to its mouth in the Mediterranean Sea. With a total area of 115 hectares, it is one of the most important green spaces in the Barcelona metropolitan region, especially if we consider its location, forming part of the urban continuum of the cities of Barcelona, Santa Coloma de Gramenet, Sant Adrià de Besòs and Montcada. i Reixac.
The contamination and degradation of the Besòs River and its surroundings is a problem that dates back to the sixties, mainly due to the great growth of the populations that surround the river and the industrialization process of these cities. The policy for the recovery of degraded river spaces initiated in the eighties by the town councils and the Generalitat of Catalonia -always with the collaboration of an increasingly sensitive citizenry- has notably improved the state of the Besòs river. It is necessary to highlight the effectiveness of the sanitation measures applied, especially in the nineties, to stop considering the Besòs river as a sewer.