We eat the tour departing from O Chao in Cabreiros, in the Musealization of the old Parish Church of Santa Mariña de Cabreiros where the arches and other elements of the old Church are located, to continue to the Trimaz River on the Puente da Acea near the Recreational Area da Acea and Football Field. We move upriver on the left bank, surpassing O Rego Chancelos or Portosouto. Bordering the river among native vegetation we arrive at the Bridge of Elizabeth II, built in queen time, around the year 1.863, to save the river at the pass of the road Rábade Ferrol. Nearby we find a bridge over the road on its new route and following upriver we pass by the AG-64 Ferrol Vilalba motorway, we see the old Muiño da Madeira, rehabilitated, and over Ponte da Madeira we change sides to continue climbing the river to Presa do Feal. Dams and bridges humanize the river accompanied by riverside trees. We find Ponte do Aruxo, Portonovo, Ponte e Presa dos Carregás until we reach Ponte Baxín where we separate from the Trimaz River. We head behind leaving behind the leafy Fragas de Penachaiña where we observe the performance in search of food from wild animals that live in the environment, such as wild boars or corks. By ancient roads we return near Portonovo and find the Chao Cabreiros road we look for the rego dos Caxigás channel to follow it on the right bank and we will see the antigo Muiño de Cabreiros, a stone bridge and then the Muiño do Ferreiro, which in addition to mill preserves an old tooth. Bordering the canal of the mill we continue upwards and deviate through the Camiño hair da Carballosa enjoying the showiness of the Fragas do San Vitorio ou Carballosa. Arriving at the top we start the descent or along mount do sputiño to look for the Fountain of Santa Mariña where according to legend the Holy one was martyred sprouting three springs where his head fell when he was beheaded. Let us approach the starting point, not without first visiting the impressive Castro that preserves the vestiges of Xermade galaico-Roman for its construction in the first Roman era, when from the invasion changed the traditional habits of the inhabitants of the castros in height to go down to more bearable heights and close to areas suitable for the cultivation and work of the land , starting in the agriculture and care of domesticated animals. We found again the AG-64 motorway to reach the core of Chao where we started the route through the parish after traveling 14.5 km.