From Turin take the motorway to Pinerolo till the end (exit Pinerolo center, Vigone ). Then go on into the big roundabout under the over pass and take direction Buriasco - Vigone (S.P.129), where there's a truck demolisher and osterie fuori porta. Go on towards Buriasco 2 km. and then, after a concrete plant named Selghis, you'll find, on the right side, the long plane tree alley leading to B&B Castelletto.
If you come from Buriasco, take S.P.129 in direction of Pinerolo, go on 2,2 km., and, after the plant GOR and a small road that indicates Rena, some 200 mt. on the left you'll find the long plane tree alley leading to B&B Castelletto.