{
  "name": "Cadair Idris Road",
  "slug": "a487-machynlleth-dolgellau",
  "url": "https://www.bestdrivingroads.com/roads/a487-machynlleth-dolgellau/",
  "summary": "A flowing inland climb between Machynlleth and Dolgellau, up the wooded Dulas valley with Cadair Idris rising above the road.",
  "roadNumbers": [
    "A487"
  ],
  "location": {
    "country": "United Kingdom",
    "region": "Wales",
    "start": {
      "name": "Penegoes",
      "lat": 52.589947,
      "lon": -3.85329
    },
    "end": {
      "name": "Brithdir",
      "lat": 52.734208,
      "lon": -3.828236
    }
  },
  "measurements": {
    "lengthMiles": 12.6,
    "lengthKm": 20.3,
    "driveMinutes": 24,
    "corners": 16,
    "hairpins": 0,
    "maxGradientPercent": 7,
    "summitMetres": 295.9,
    "elevationConfidence": "measured",
    "difficulty": "moderate",
    "tightnessOutOf10": 4
  },
  "timing": {
    "bestSeasons": [
      "spring",
      "summer",
      "autumn"
    ]
  },
  "conditions": {},
  "hazards": [
    "Narrow bridges",
    "Heavy summer traffic",
    "Coastal weather"
  ],
  "scenery": [
    "mountain",
    "valley"
  ],
  "pointsOfInterest": [
    "Cad West",
    "Machynlleth War Memorial",
    "Hughes Memorial"
  ],
  "geometry": {
    "pointCount": 123
  },
  "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"
}