{
  "name": "Tongtian Avenue",
  "slug": "tongtian-avenue",
  "url": "https://www.bestdrivingroads.com/roads/tongtian-avenue/",
  "summary": "Tongtian Avenue, the Road to Heaven, climbs 11 km up the sheer face of Tianmen Mountain through its famous 99 bends, rising 1,100 m to a natural rock arch at 1,300 m.",
  "roadNumbers": [
    "Y104"
  ],
  "location": {
    "country": "China",
    "region": "Hunan",
    "start": {
      "name": "Zhangjiajie",
      "lat": 29.07156,
      "lon": 110.470161
    },
    "end": {
      "name": "Tianmen Mountain",
      "lat": 29.053406,
      "lon": 110.481585
    }
  },
  "measurements": {
    "lengthMiles": 7,
    "lengthKm": 11.3,
    "driveMinutes": 18,
    "corners": 91,
    "hairpins": 33,
    "maxGradientPercent": 20,
    "summitMetres": 1228.3,
    "elevationConfidence": "approximate (30 m DEM cannot resolve this line)",
    "difficulty": "expert",
    "tightnessOutOf10": 10
  },
  "timing": {
    "bestSeasons": [
      "spring",
      "autumn"
    ]
  },
  "conditions": {},
  "hazards": [
    "Open to tourist buses only, private vehicles not permitted",
    "99 hairpin bends cause severe motion sickness",
    "Summit 10C colder than the base",
    "Frequent fog on the upper sections",
    "Vertical cliff drops off the road edge"
  ],
  "scenery": [
    "mountain",
    "gorge",
    "forest"
  ],
  "pointsOfInterest": [
    "Tongtian Avenue",
    "Yuhu Peak",
    "Tianmen South Overlook"
  ],
  "geometry": {
    "pointCount": 132
  },
  "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": "2026-08-03"
}