From Oviedo, Gijon or Santander:
Take interstate A-8 East.
At Villaviciosa, take highway AS-255 toward Infiesto.
Continue one kilometer.
Pass the village of Amandi and continue to Valbucar.
Turn right onto AS- Poreñu-Nava.
Continue fifty meters and turn right again.

El Molin de Petra is located up the road right after passing a small bridge over the river Ximagues.