By A75, exit 6 (Champeix, St-Nectaire, Besse). Through the villages Plauzat and Champeix, then arriving at Montaigut-le-Blanc.
At the bottom of the village, follow the D639 which goes up towards Olloix. Still on this road, a straight line through new houses will take you to the end of the village where you will turn right. “Guest rooms at the castle” signs will guide you to the entrance gate of the castle.
Pay attention to the GPS: it may indicate to go through the small streets of the village!