{
  "name": "Chinook Pass (Mather Memorial Parkway)",
  "slug": "chinook-pass-mather-memorial-parkway",
  "url": "https://www.bestdrivingroads.com/roads/chinook-pass-mather-memorial-parkway/",
  "summary": "SR 410's All-American climb over the northeast shoulder of Mount Rainier, with the famous Tipsoo Lake hairpins at Chinook Pass.",
  "roadNumbers": [
    "WA 410"
  ],
  "location": {
    "country": "United States",
    "region": "Washington",
    "start": {
      "name": "Cayuse Pass",
      "lat": 46.866535,
      "lon": -121.539295
    },
    "end": {
      "name": "American River (east of Chinook Pass)",
      "lat": 46.907252,
      "lon": -121.422627
    }
  },
  "measurements": {
    "lengthMiles": 8.9,
    "lengthKm": 14.3,
    "driveMinutes": 20,
    "corners": 60,
    "hairpins": 0,
    "maxGradientPercent": 7,
    "summitMetres": 1657.3,
    "elevationConfidence": "measured",
    "difficulty": "demanding",
    "tightnessOutOf10": 7
  },
  "timing": {
    "bestSeasons": [
      "summer",
      "autumn"
    ],
    "closesInWinter": true
  },
  "conditions": {},
  "hazards": [
    "High-altitude summit weather and late-lying snow",
    "Rockfall on cut slopes",
    "Slow RV and tour traffic in summer"
  ],
  "scenery": [
    "mountain",
    "forest",
    "lakes"
  ],
  "pointsOfInterest": [
    "Chinook Pass",
    "Cayuse Pass",
    "Deadwood Peak"
  ],
  "geometry": {
    "pointCount": 81
  },
  "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"
}