Mont-sur-Rolle is a municipality in the district of Nyon in the canton of Vaud in Switzerland. It is located 2ā3 kilometres from the shores of Lā¦Mont-sur-Rolle is a municipality in the district of Nyon in the canton of Vaud in Switzerland. It is located 2ā3 kilometres from the shores of Lac Léman, above the lake-side town of Rolle. The area is famed for its wine-making fields which has a distinctive fizzy-fruit flavour.