{
  "name": "Bwlch Oerddrws",
  "slug": "a470-bwlch-oerddrws",
  "url": "https://www.bestdrivingroads.com/roads/a470-bwlch-oerddrws/",
  "summary": "The 'Pass of the Cold Door', a fast A470 mountain pass between Dinas Mawddwy and Dolgellau that opens up the great eastern wall of Cadair Idris.",
  "roadNumbers": [
    "A470"
  ],
  "location": {
    "country": "United Kingdom",
    "region": "Gwynedd",
    "start": {
      "name": "Dinas Mawddwy",
      "lat": 52.718433,
      "lon": -3.691019
    },
    "end": {
      "name": "Dolgellau",
      "lat": 52.742694,
      "lon": -3.885633
    }
  },
  "measurements": {
    "lengthMiles": 9,
    "lengthKm": 14.5,
    "driveMinutes": 16,
    "corners": 26,
    "hairpins": 0,
    "maxGradientPercent": 9,
    "summitMetres": 371.5,
    "elevationConfidence": "measured",
    "difficulty": "moderate",
    "tightnessOutOf10": 3
  },
  "timing": {
    "bestSeasons": [
      "spring",
      "summer",
      "autumn",
      "winter"
    ]
  },
  "conditions": {},
  "hazards": [
    "Hill fog and crosswinds over exposed summit",
    "Fast oncoming traffic on sweeping descents",
    "Sheep on unfenced upper road"
  ],
  "scenery": [
    "mountain",
    "moorland",
    "valley"
  ],
  "pointsOfInterest": [
    "Dolgellau War Memorial",
    "Bwlch yr Oerddrws",
    "Bluebell Hill"
  ],
  "geometry": {
    "pointCount": 74
  },
  "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"
}