{
  "answerability": "evidence_backed_claims_available",
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    {
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          "source_load_date": "2022-01-14T10:16:12.000",
          "source_mode_attributes": {
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            "hiker_pedestrian": "Yes",
            "pack_saddle": "No"
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          }
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        {
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          "evidence_id": "evidence-route-segment-lassen-peak-trailhead-summit",
          "notes": "",
          "observation_id": "observation-usgs-topo-vector-lassen-trails-20250729-20260923",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "The USGS Topo Map Vector Data product 25034 Lassen Peak CA, published 2025-07-29 in EPSG:4269, includes NPS-originated recreational-trail features. Feature 156823fe-597b-42f7-85ad-d3d73e6754a7 is named Lassen Peak Trail, runs from (-121.5057222, 40.4748484) to (-121.5049354, 40.4881397), and has lengthmiles 2.51712045. Feature c128bf58-c8ed-4821-9955-5fba72c87998 is named Brokeoff Mountain Trail, runs from (-121.5361309, 40.4309029) to (-121.5595943, 40.4456411), and has lengthmiles 3.60834485. Both features identify National Park Service as source originator and NPS Trails 11/2019 as the source-data description; the dataset warns that temporal changes may have occurred.",
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          "observed_at": null,
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          "retrieved_at": "2026-09-23T20:00:00+00:00",
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      "sources": [
        {
          "locator": "https://prd-tnm.s3.amazonaws.com/StagedProducts/TopoMapVector/CA/GPKG/VECTOR_Lassen_Peak_CA_7_5_Min_GPKG.gpkg",
          "publisher": "U.S. Geological Survey",
          "source_id": "source-usgs-topo-vector-lassen-peak-20250729"
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  ],
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    }
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  "journey": [],
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  "reference_evidence": [],
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}