From the north coming from Ruoms, at the roundabout indicating Vallon Pont d'Arc and Grospierres / Ales, take the D111 Grospierres / Ales.
The chalets are about 400 m on the right, there is also a sign "Domaine les Terriers" in large.
Then take the small path after the olive trees that line the entrance on the right. you walk around the cellar and a car park will be on your left.