Gravel route, beginning and ending at "Polo B - Ribatejo do Centro de Cyclin' Erra-Coruche", located in the village of Erra. This route is of high skill level, that runs through the area north of Erra, taking place mostly on wide dirt tracks, with some unevenness. This route allows you to explore the agricultural areas along the Sorraia River as well as the cork oak forests that characterize that region.