Saint-Hilaire (pronunciationⓘ), also known as Saint-Hilaire-du-Touvet (French pronunciation: [sɛ̃t‿ilɛːʁ dy tuvɛ]), is a former commune in the Isère department in the Auvergne-Rhône-Alpes region in Southeastern France.

On 1 January 2019, Saint-Hilaire was merged into the new commune of Plateau-des-Petites-Roches, alongside Saint-Bernard and Saint-Pancrasse.

[3] It is situated on the Plateau des Petites Roches, a natural balcony above the valley of the Isère, on the east side of the Massif de la Chartreuse and overlooked by the peak of the Dent de Crolles.

The funicular was constructed principally to serve several sanatoriums built at the same time to house tuberculosis patients.

On 29 December 2021, violent rainfall on water-saturated soil combined with rapid melting of the snowpack caused the Montfort stream to overflow its banks, seriously damaging the tracks and the funicular's downstream station, which were covered with several meters of gravel.