At the fountain of Piñeiro, the water is sweet, delicious, and welcome. This is a great picnic spot. If you plan to stay at La Rectoral de Castillón casa rural (a splendid option at a good price) this is the place to phone Rosa, the proprietor, and ask for a ride. The inn is very nearby, but walking directions are unclear. She can return you to the fountain in the morning, or set you down at a place along the road if there is too much mud.
From Piñeiro onward to Camiño Grande, the mojones take you on a lovely walk through fields and green tunnels, with stone walls on either side.