{
  "name": "Serra da Estrela",
  "slug": "serra-da-estrela-n339",
  "url": "https://www.bestdrivingroads.com/roads/serra-da-estrela-n339/",
  "summary": "The N339 climbs from Seia into bare granite and glacial valleys, home in winter to Portugal's only ski slopes, then drops to Loriga. Cyclists and free-roaming livestock share the long climb.",
  "roadNumbers": [
    "N339"
  ],
  "location": {
    "country": "Portugal",
    "region": "Guarda",
    "start": {
      "name": "Seia",
      "lat": 40.418071,
      "lon": -7.706782
    },
    "end": {
      "name": "Loriga",
      "lat": 40.321966,
      "lon": -7.613342
    }
  },
  "measurements": {
    "lengthMiles": 18.3,
    "lengthKm": 29.5,
    "driveMinutes": 37,
    "corners": 36,
    "hairpins": 0,
    "maxGradientPercent": 9,
    "summitMetres": 1990.2,
    "elevationConfidence": "measured",
    "difficulty": "demanding",
    "tightnessOutOf10": 5
  },
  "timing": {
    "bestSeasons": [
      "spring",
      "summer",
      "autumn"
    ]
  },
  "conditions": {},
  "hazards": [
    "Snow and fog at altitude",
    "Free-roaming livestock",
    "Cyclists on the climb"
  ],
  "scenery": [
    "mountain"
  ],
  "pointsOfInterest": [
    "Miradouro do Vale de Loriga",
    "Covão do Curral"
  ],
  "geometry": {
    "pointCount": 268
  },
  "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"
}