{
  "name": "Haleakala Crater Road",
  "slug": "haleakala-crater-road",
  "url": "https://www.bestdrivingroads.com/roads/haleakala-crater-road/",
  "summary": "The paved road to the top of Haleakala climbs from Maui's central plain to 3,055 m, gaining more height over a shorter distance than any road on earth, through multiple climate zones to an otherworldly summit crater.",
  "roadNumbers": [
    "HI 378"
  ],
  "location": {
    "country": "United States",
    "region": "Hawaii",
    "start": {
      "name": "Pukalani",
      "lat": 20.768587,
      "lon": -156.306019
    },
    "end": {
      "name": "Haleakala Summit",
      "lat": 20.710197,
      "lon": -156.252584
    }
  },
  "measurements": {
    "lengthMiles": 21.2,
    "lengthKm": 34.1,
    "driveMinutes": 47,
    "corners": 110,
    "hairpins": 12,
    "maxGradientPercent": 10,
    "summitMetres": 3042.4,
    "elevationConfidence": "measured",
    "difficulty": "moderate",
    "tightnessOutOf10": 7
  },
  "timing": {
    "bestSeasons": [
      "spring",
      "summer",
      "autumn",
      "winter"
    ]
  },
  "conditions": {},
  "hazards": [
    "Blind bends",
    "Steep drop-offs without guardrails",
    "Altitude sickness above 3,000 m",
    "Sudden weather and ice at the summit",
    "Cattle and nene geese on the road"
  ],
  "scenery": [
    "mountain",
    "valley"
  ],
  "pointsOfInterest": [
    "Leleiwi Overlook",
    "Kalahaku Overlook",
    "Puʻuʻulaʻula"
  ],
  "geometry": {
    "pointCount": 271
  },
  "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"
}