In a circular route with an "Average" degree of difficulty and approximately 8 km, the SET4 offers us a steep slope of 356 m, almost always by trails or dirt roads. With starting and ending points at the Albarquel Urban Park, the SET4 allows the visitor to start the exploration of the park from a Network Visitor Support Centre (SCAVIER – GoArrábida), taking full advantage of this installation and the services provided. With magnificent views of the Sado Estuary, the visitor is invited to visit the Fort of S. Filipe and the Mills in the surrounding area.