Montnegre i el Corredor Natural Park Nature · Dosrius, Maresme, Barcelona Image of Dosrius, not of the place itself. Montnegre i el Corredor Park is a protected natural area of about 15,000 hectares between the Maresme and Vallès Oriental comarcas, in the province of Barcelona, with cork-oak woods and forests of great diversity, managed by the Barcelona Provincial Council. Located in the Catalan Litoral mountain range, the Vallgorguina and Arenys streams separate the Corredor and Montnegre massifs, whose highest points are the Corredor sanctuary, at 633 metres, and the Turó Gros, at 760. The granite substrate, crossed by vein rocks, breaks down through erosion, producing the characteristic sauló (granitic sand) and formations of large stone boulders, in a Mediterranean climate with appreciable summer rainfall and occasional cold spells. Photo: Pere López (CC BY-SA 3.0) What to see and do in Dosrius