{
  "name": "Lacets de Montvernier",
  "slug": "lacets-de-montvernier",
  "url": "https://www.bestdrivingroads.com/roads/lacets-de-montvernier/",
  "summary": "Seventeen hairpins stacked up a cliff face in barely two kilometres, one of the most photographed pieces of road in the Alps.",
  "roadNumbers": [
    "D77B"
  ],
  "location": {
    "country": "France",
    "region": "Savoie",
    "start": {
      "name": "Pontamafrey",
      "lat": 45.315818,
      "lon": 6.338316
    },
    "end": {
      "name": "Montvernier",
      "lat": 45.318758,
      "lon": 6.342697
    }
  },
  "measurements": {
    "lengthMiles": 1.7,
    "lengthKm": 2.7,
    "driveMinutes": 4,
    "corners": 17,
    "hairpins": 17,
    "maxGradientPercent": 12,
    "summitMetres": 754.4,
    "elevationConfidence": "measured",
    "difficulty": "demanding",
    "tightnessOutOf10": 10
  },
  "timing": {
    "bestSeasons": [
      "spring",
      "summer",
      "autumn"
    ]
  },
  "conditions": {},
  "hazards": [
    "Blind narrow hairpins with little passing room",
    "Heavy cyclist traffic in summer",
    "Sheer drops with minimal barriers"
  ],
  "scenery": [
    "valley",
    "mountain"
  ],
  "pointsOfInterest": [
    "Belvedere du Rocher aux Chamois",
    "O P'tits Lacets"
  ],
  "geometry": {
    "pointCount": 48
  },
  "attribution": {
    "source": "Routes - bestdrivingroads.com",
    "citation": "Cite with a link to the road page. Stats are measured from the mapped line, not copied from other lists; where elevationConfidence is \"approximate\" the 30 m DEM cannot resolve that line and the elevation figures are indicative.",
    "roadGeometry": "(c) OpenStreetMap contributors, ODbL",
    "terms": "Facts are free to cite with attribution; bulk reproduction of the catalogue requires permission (simon@keane.studio)."
  },
  "updated": "2026-07-25"
}