{
  "name": "Black Mountain Pass",
  "slug": "black-mountain-pass-a4069",
  "url": "https://www.bestdrivingroads.com/roads/black-mountain-pass-a4069/",
  "summary": "A sinuous ribbon over the western Brecon Beacons, all open moor and big sky.",
  "roadNumbers": [
    "A4069"
  ],
  "location": {
    "country": "United Kingdom",
    "region": "Wales",
    "start": {
      "name": "Llangadog",
      "lat": 51.941556,
      "lon": -3.886874
    },
    "end": {
      "name": "Brynamman",
      "lat": 51.815694,
      "lon": -3.862951
    }
  },
  "measurements": {
    "lengthMiles": 12.1,
    "lengthKm": 19.5,
    "driveMinutes": 27,
    "corners": 30,
    "hairpins": 1,
    "maxGradientPercent": 12,
    "summitMetres": 496.5,
    "elevationConfidence": "measured",
    "difficulty": "demanding",
    "tightnessOutOf10": 7
  },
  "timing": {
    "bestSeasons": [
      "spring",
      "summer",
      "autumn"
    ]
  },
  "conditions": {},
  "hazards": [
    "Open moorland with roaming livestock",
    "Blind summits",
    "Exposed to wind and fog"
  ],
  "scenery": [
    "mountain",
    "moorland"
  ],
  "pointsOfInterest": [
    "Herbert's Quarry",
    "Pen Rhiw-ddu",
    "Bryn-têg"
  ],
  "geometry": {
    "pointCount": 149
  },
  "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"
}