{
  "name": "Slumgullion Pass",
  "slug": "slumgullion-pass-co-149",
  "url": "https://www.bestdrivingroads.com/roads/slumgullion-pass-co-149/",
  "summary": "Steep San Juan climb on the Silver Thread Byway",
  "roadNumbers": [
    "CO 149"
  ],
  "location": {
    "country": "United States",
    "region": "Colorado",
    "start": {
      "name": "Lake City",
      "lat": 38.029834,
      "lon": -107.315377
    },
    "end": {
      "name": "Creede",
      "lat": 37.955475,
      "lon": -107.174175
    }
  },
  "measurements": {
    "lengthMiles": 15.4,
    "lengthKm": 24.8,
    "driveMinutes": 32,
    "corners": 30,
    "hairpins": 0,
    "maxGradientPercent": 10,
    "summitMetres": 3522.1,
    "elevationConfidence": "measured",
    "difficulty": "moderate",
    "tightnessOutOf10": 6
  },
  "timing": {
    "bestSeasons": [
      "summer",
      "autumn"
    ]
  },
  "conditions": {},
  "hazards": [
    "High altitude over 11,000 feet",
    "Steep sustained grades",
    "Winter snow and ice"
  ],
  "scenery": [
    "mountain",
    "forest",
    "valley"
  ],
  "pointsOfInterest": [
    "Windy Point Observation Site",
    "Slumgullion Pass",
    "Alferd Packer Memorial"
  ],
  "geometry": {
    "pointCount": 179
  },
  "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"
}