My mother's castle (1990)

To his chagrin, young Marcel Pagnol and his family move back to their home in Marseille, France, far from their pastoral holiday cottage in the hills. Determined, Marcel makes the long voyage back to the cottage on foot and lands himself in trouble. One day Marcel's father discovers a shortcut to the cottage, but it requires trespassing. Despite their trepidations, Marcel and his family begin using the secret trail to reach their cottage.