{
  "answerability": "evidence_backed_claims_available",
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    {
      "claim": {
        "claim_id": "claim-route-segment-bumpass-basin-approach-entry",
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        ],
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        ],
        "subject_id": "route-segment-bumpass-basin-approach-entry",
        "temporal_scope": null,
        "value": {
          "coordinate_reference_system": "EPSG:4269",
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          "dataset_feature_name": "Bumpass Hell Trail",
          "dataset_field": "lengthmiles",
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          "distance_status": "known",
          "end_coordinate": {
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            "longitude": -121.5023271
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          "operational_status_requires_current_check": true,
          "route_role": "official_mainline",
          "source_data_description": "NPS Trails 11/2019",
          "source_load_date": "2024-09-04T08:26:58.000",
          "source_mode_attributes": {
            "bicycle": "No",
            "hiker_pedestrian": "Yes",
            "pack_saddle": "No"
          },
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          "start_coordinate": {
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            "longitude": -121.5027609
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      },
      "evidence": [
        {
          "claim_id": "claim-route-segment-bumpass-basin-approach-entry",
          "evidence_id": "evidence-route-segment-bumpass-basin-approach-entry",
          "notes": "",
          "observation_id": "observation-usgs-topo-vector-bumpass-trails-20250729-20260923",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "In the USGS Topo Map Vector Data product 25034 Lassen Peak CA, NPS-originated Bumpass Hell Trail feature d0d63ec3-c99c-41e0-a353-50ac64f4fff8 runs from (-121.5140219, 40.4661208) to (-121.5027609, 40.4571800) with lengthmiles 1.26580720. Feature bb47380f-f9c1-43dc-b734-cdc1435cf00b continues from that exact endpoint to (-121.5023271, 40.4573718) with lengthmiles 0.02984205, where it shares an endpoint with a Bumpass Hell Boardwalk feature and a separate Bumpass Hell Trail feature continuing east. The trail features identify National Park Service as source originator and NPS Trails 11/2019 as their source-data description; the dataset warns that temporal changes may have occurred.",
          "observation_id": "observation-usgs-topo-vector-bumpass-trails-20250729-20260923",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-23T21:00:00+00:00",
          "source_id": "source-usgs-topo-vector-lassen-peak-20250729"
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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"
        }
      ],
      "subject": {
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    "name": "Bumpass Hell basin approach junction to basin entry"
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  "journey": [],
  "knowledge_gaps": [],
  "reference_evidence": [],
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  "route_geometry_url": null,
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}