This is an ecopista (old railway converted into a greenpath) on one of the most isolated regions of Portugal. The track is mostly gravel and ends in Torre de moncorvo, a nice city with all services (food, accomodation, etc).
Beautifull nature hike with wide trails also accessible with 4x4 vehicle (but unpassable in the midle of the loop. Lanscape with olive and almond orchards ans wild nature
Nice views of the Sabor River valley at this point on a large highway. A pause to see how the river has left its mark on this point of the reservoir. Further south is the Miradouro Santo Antão da Barca.