If GPS enter Courdemanche Valley because it is a hamlet in Courdemanche.

Otherwise follow this route: exit of Paris by motorway from Rouen A13Suivre signs up to Dreux (often at right) and take the national 12 about 80 kms from Parisarrives to Dreux, do not take the right direction Dreux Centre, but continue. Pass sheds transport Delisle and a small narrowed down, the dealer Mazda take branch green in Drouais - Mesnil on the Estrée for 3 / 4 km passing a pretty bridge and climbing the Hill. Mesnil on the Estrée, take to the small round point branch Illiers L'EVEQUE. Still 3 / 4 kms in the plain to a grain silo hangar. Bypass on the right the silo, towards the Valley, 300 m and finish in the rue de la Garenne Petite in Courdemanche the Vallee.c' is there, at number 3. In winter, it is better to park after the wall, down, and enter through the back door of wood (after the great) the garden.