{
  "_provenance": {
    "source": "Derived 2026-09-28 from the Enchantments Traverse Planner app seeds: waypoints.seed.json (trailheads, Aasgard Pass), water.seed.json (the traverse lakes, their OpenStreetMap-tagged elevation in metres and the intermittent tag), eightmile.track.v0.json (the Eightmile Trailhead, its lakes and Windy Pass), campsites.seed.json (camping areas mapped by OpenStreetMap contributors as tourism=camp_site with backcountry=yes inside a permit zone, retrieved 2026-09-28; not the Forest Service's designated-site list, and not a complete list of where people camp: OSM maps none in the Eightmile/Caroline zone and none at Perfection, Inspiration or Tranquil). Positions are OpenStreetMap, ODbL. Lake availability: \"mapped-non-seasonal\" only where OpenStreetMap carries intermittent=no; \"unverified\" everywhere else. No lake is classified permanent. crossings: the Snow Lakes dam, position from OpenStreetMap way 300728913 (2026-09-28), what it is from the USFS Snow Lakes Trail page (Jun 9, 2026).",
    "note": "routeKm is the distance along that feature's own mapped line from its own trailhead, computed by great-circle summation between line vertices. It is an index along a crowd-sourced line, not a measured or official distance. The traverse (Stuart Lake Trailhead to Snow Lakes Trailhead) and the two Eightmile lines each carry their own routeKm; the numbers are never comparable across lines. Elevation for trailheads and passes is not in this file; the map page reads the modeled DEM height of the nearest line vertex and labels it as modeled."
  },
  "trailheads": [
    {
      "id": "landmark-stuart-lake-trailhead",
      "name": "Stuart Lake Trailhead",
      "lat": 47.527755,
      "lon": -120.820866,
      "line": "traverse",
      "routeKm": 0,
      "osmSource": "OpenStreetMap, checked August 2026",
      "note": "Start of the mapped traverse line."
    },
    {
      "id": "landmark-snow-lakes-trailhead",
      "name": "Snow Lakes Trailhead",
      "lat": 47.544083,
      "lon": -120.709661,
      "line": "traverse",
      "routeKm": 28.87,
      "osmSource": "OpenStreetMap, checked August 2026, tagged as a US Forest Service trailhead",
      "note": "End of the mapped traverse line."
    },
    {
      "id": "landmark-eightmile-trailhead",
      "name": "Eightmile Trailhead",
      "lat": 47.53598,
      "lon": -120.8137,
      "line": "eightmile-lake",
      "routeKm": 0,
      "osmSource": "OpenStreetMap node 12053857534",
      "note": "Start of the Eightmile Lake line and the Lake Caroline and Windy Pass line, on Forest Road 7601."
    }
  ],
  "passes": [
    {
      "id": "landmark-aasgard-pass",
      "name": "Aasgard Pass",
      "lat": 47.480785,
      "lon": -120.822454,
      "line": "traverse",
      "routeKm": 8.91,
      "osmSource": "OpenStreetMap saddle, on the mapped line",
      "note": "High point of the mapped traverse line."
    },
    {
      "id": "landmark-windy-pass",
      "name": "Windy Pass",
      "lat": 47.552643,
      "lon": -120.874698,
      "line": "windy-pass",
      "routeKm": 11.84,
      "osmSource": "OpenStreetMap node 5521362826",
      "note": "End of the Lake Caroline and Windy Pass line."
    }
  ],
  "lakes": [
    {
      "id": "water-little-colchuck-lake",
      "name": "Little Colchuck Lake",
      "lat": 47.493511,
      "lon": -120.837991,
      "line": "traverse",
      "routeKm": 6.36,
      "elevationM": null,
      "availability": "unverified"
    },
    {
      "id": "water-colchuck-lake",
      "name": "Colchuck Lake",
      "lat": 47.493152,
      "lon": -120.833794,
      "line": "traverse",
      "routeKm": 6.42,
      "elevationM": 1698,
      "availability": "unverified"
    },
    {
      "id": "water-tranquil-lake",
      "name": "Tranquil Lake",
      "lat": 47.48098,
      "lon": -120.818053,
      "line": "traverse",
      "routeKm": 9.35,
      "elevationM": 2372,
      "availability": "unverified"
    },
    {
      "id": "water-inspiration-lake",
      "name": "Inspiration Lake",
      "lat": 47.48225,
      "lon": -120.801064,
      "line": "traverse",
      "routeKm": 11.42,
      "elevationM": 2196,
      "availability": "unverified"
    },
    {
      "id": "water-perfection-lake",
      "name": "Perfection Lake",
      "lat": 47.480206,
      "lon": -120.797163,
      "line": "traverse",
      "routeKm": 12.29,
      "elevationM": 2164,
      "availability": "mapped-non-seasonal"
    },
    {
      "id": "water-sprite-lake",
      "name": "Sprite Lake",
      "lat": 47.478817,
      "lon": -120.794608,
      "line": "traverse",
      "routeKm": 12.45,
      "elevationM": 2162,
      "availability": "mapped-non-seasonal"
    },
    {
      "id": "water-leprechaun-lake",
      "name": "Leprechaun Lake",
      "lat": 47.478551,
      "lon": -120.786621,
      "line": "traverse",
      "routeKm": 13.21,
      "elevationM": 2096,
      "availability": "mapped-non-seasonal"
    },
    {
      "id": "water-lake-viviane",
      "name": "Lake Viviane",
      "lat": 47.482487,
      "lon": -120.78378,
      "line": "traverse",
      "routeKm": 13.49,
      "elevationM": 2068,
      "availability": "mapped-non-seasonal"
    },
    {
      "id": "water-snow-lakes",
      "name": "Snow Lakes",
      "lat": 47.483065,
      "lon": -120.749933,
      "line": "traverse",
      "routeKm": 17.77,
      "elevationM": 1656,
      "availability": "unverified"
    },
    {
      "id": "water-nada-lake",
      "name": "Nada Lake",
      "lat": 47.4945,
      "lon": -120.7406,
      "line": "traverse",
      "routeKm": 19.52,
      "elevationM": 1504,
      "availability": "mapped-non-seasonal"
    },
    {
      "id": "water-little-eightmile-lake",
      "name": "Little Eightmile Lake",
      "lat": 47.52412,
      "lon": -120.85123,
      "line": "eightmile-lake",
      "routeKm": 4.2,
      "elevationM": null,
      "availability": "unverified",
      "osm": "way 328892287"
    },
    {
      "id": "water-eightmile-lake",
      "name": "Eightmile Lake",
      "lat": 47.52032,
      "lon": -120.86674,
      "line": "eightmile-lake",
      "routeKm": 5.79,
      "elevationM": null,
      "availability": "unverified",
      "osm": "relation 17093842"
    },
    {
      "id": "water-lake-caroline",
      "name": "Lake Caroline",
      "lat": 47.53944,
      "lon": -120.86436,
      "line": "windy-pass",
      "routeKm": 7.8,
      "elevationM": null,
      "availability": "unverified",
      "osm": "relation 17093953"
    },
    {
      "id": "water-little-caroline-lake",
      "name": "Little Caroline Lake",
      "lat": 47.54363,
      "lon": -120.87226,
      "line": "windy-pass",
      "routeKm": 9.06,
      "elevationM": null,
      "availability": "unverified",
      "osm": "relation 17093955"
    }
  ],
  "campsites": [
    {
      "id": "camp-colchuck-lake",
      "name": "Colchuck Lake Backcountry Camping",
      "lat": 47.493745,
      "lon": -120.83569,
      "line": "traverse",
      "routeKm": 6.4049,
      "zoneId": "permit-zone-colchuck",
      "zoneName": "Colchuck",
      "osm": "way 1387603478"
    },
    {
      "id": "camp-lake-stuart",
      "name": "Lake Stuart Camping Area",
      "lat": 47.497564,
      "lon": -120.878148,
      "line": null,
      "routeKm": null,
      "zoneId": "permit-zone-stuart",
      "zoneName": "Stuart",
      "osm": "way 1498104516"
    },
    {
      "id": "camp-lake-viviane",
      "name": "Lake Viviane Backcountry Camping",
      "lat": 47.481697,
      "lon": -120.781495,
      "line": "traverse",
      "routeKm": 13.8215,
      "zoneId": "permit-zone-core-enchantment",
      "zoneName": "Core Enchantment",
      "osm": "way 890287728"
    },
    {
      "id": "camp-leprechaun-lake",
      "name": "Leprechaun Lake Backcountry Camping",
      "lat": 47.479673,
      "lon": -120.786157,
      "line": "traverse",
      "routeKm": 13.2832,
      "zoneId": "permit-zone-core-enchantment",
      "zoneName": "Core Enchantment",
      "osm": "node 3160872955"
    },
    {
      "id": "camp-nada-lake",
      "name": "Nada Lake Backcountry Camping",
      "lat": 47.497872,
      "lon": -120.734571,
      "line": "traverse",
      "routeKm": 20.2239,
      "zoneId": "permit-zone-snow",
      "zoneName": "Snow",
      "osm": "node 3160874697"
    },
    {
      "id": "camp-snow-creek",
      "name": "Snow Creek Backcountry Camping",
      "lat": 47.478422,
      "lon": -120.804679,
      "line": "traverse",
      "routeKm": 10.7571,
      "zoneId": "permit-zone-core-enchantment",
      "zoneName": "Core Enchantment",
      "osm": "way 890287729"
    },
    {
      "id": "camp-snow-lakes",
      "name": "Snow Lakes Backcountry Camping",
      "lat": 47.481456,
      "lon": -120.756389,
      "line": "traverse",
      "routeKm": 17.1985,
      "zoneId": "permit-zone-snow",
      "zoneName": "Snow",
      "osm": "way 1486113401"
    },
    {
      "id": "camp-sprite-lake",
      "name": "Sprite Lake Backcountry Camping",
      "lat": 47.478887,
      "lon": -120.793704,
      "line": "traverse",
      "routeKm": 12.5134,
      "zoneId": "permit-zone-core-enchantment",
      "zoneName": "Core Enchantment",
      "osm": "node 3160872727"
    },
    {
      "id": "camp-osm-14073401580",
      "name": null,
      "lat": 47.508653,
      "lon": -120.8321,
      "line": "traverse",
      "routeKm": 2.5527,
      "zoneId": "permit-zone-stuart",
      "zoneName": "Stuart",
      "osm": "node 14073401580"
    }
  ],
  "crossings": [
    {
      "id": "landmark-snow-lakes-dam",
      "name": "Snow Lakes dam",
      "lat": 47.48552,
      "lon": -120.74929,
      "line": "traverse",
      "routeKm": 17.97,
      "note": "The Forest Service: the trail goes over the old dam between Upper and Lower Snow Lakes. OpenStreetMap maps it as a paved-stone walkway about half a metre wide, with the irrigation districts' spillway pipe beneath it. Hikers report water running over the dam from early June to late July."
    }
  ]
}