Drive towards Sanremo on the SS1. In the roundabout before the river Nervia (Val Nervia) turn left onto the SP64 – stay on the SP64 for 20 km, until you reach Pigna.
After Pigna follow the road and the signs for Castelvittorio for 4 km.
Bus number 7 from Ventimiglia stops in Castelvittorio. Runs several times a day.