{
  "name": "Puerto de San Glorio",
  "slug": "puerto-de-san-glorio-n-621",
  "url": "https://www.bestdrivingroads.com/roads/puerto-de-san-glorio-n-621/",
  "summary": "Long hairpin climb over the Picos de Europa",
  "roadNumbers": [
    "N-621"
  ],
  "location": {
    "country": "Spain",
    "region": "Castile and León",
    "start": {
      "name": "Boca de Huérgano",
      "lat": 43.041967,
      "lon": -4.851665
    },
    "end": {
      "name": "Potes",
      "lat": 43.15379,
      "lon": -4.623257
    }
  },
  "measurements": {
    "lengthMiles": 22.2,
    "lengthKm": 35.7,
    "driveMinutes": 47,
    "corners": 40,
    "hairpins": 5,
    "maxGradientPercent": 10,
    "summitMetres": 1608.7,
    "elevationConfidence": "measured",
    "difficulty": "moderate",
    "tightnessOutOf10": 6
  },
  "timing": {
    "bestSeasons": [
      "summer",
      "autumn"
    ]
  },
  "conditions": {},
  "hazards": [
    "Winter snow and ice",
    "Free-roaming cattle",
    "Long descents"
  ],
  "scenery": [
    "mountain",
    "valley"
  ],
  "pointsOfInterest": [
    "Mirador Sierra de Orpiñas",
    "Mirador del Corzo",
    "Puerto de San Glorio"
  ],
  "geometry": {
    "pointCount": 361
  },
  "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"
}