{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-lassen-peak-trail-profile",
        "evidence_ids": [
          "evidence-lassen-peak-trail-profile"
        ],
        "predicate": "published_route_profile",
        "spatial_scope_ids": [
          "scope-route-lassen-peak-trail"
        ],
        "subject_id": "route-lassen-peak-trail",
        "temporal_scope": null,
        "value": {
          "difficulty": "strenuous",
          "elevation_gain_ft": 1957,
          "round_trip_miles": 5,
          "round_trip_time_hours": "4 to 5",
          "start_elevation_ft": 8500,
          "surface": "packed dirt with some loose rock"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-lassen-peak-trail-profile",
          "evidence_id": "evidence-lassen-peak-trail-profile",
          "notes": "",
          "observation_id": "observation-nps-lassen-peak-trail-20260923",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "Lassen Peak Trail starts at Lassen Peak Trailhead; it is a strenuous five-mile round trip taking four to five hours, starting near 8,500 feet and gaining 1,957 feet. Snow, weather, altitude, and lightning require trip-specific checks.",
          "observation_id": "observation-nps-lassen-peak-trail-20260923",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-23T03:30:00+00:00",
          "source_id": "source-nps-lassen-peak-trail"
        }
      ],
      "sources": [
        {
          "locator": "https://www.nps.gov/thingstodo/hikelassenpeak.htm",
          "publisher": "National Park Service",
          "source_id": "source-nps-lassen-peak-trail"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "route-lassen-peak-trail",
      "kind": "route",
      "name": "Lassen Peak Trail"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260923-lassen-destinations-route-depth",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/sources/source-nps-lassen-peak-trail.json",
      "reason": "Publish official-source Lassen destination identities, named hiking routes, evidenced starts, route profiles, and route-condition rechecks without inventing segment topology.",
      "record_id": "source-nps-lassen-peak-trail",
      "record_type": "source",
      "summary": "Add official-source Lassen destinations, named hiking routes, evidenced trailheads, route profiles, and route-condition rechecks while preserving the remaining segment-topology gap."
    }
  ],
  "navigation": {
    "next_id": "source-nps-lassen-permits",
    "position": 211,
    "previous_id": "source-nps-lassen-hydrothermal",
    "total": 587
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "Lassen Peak Trail starts at Lassen Peak Trailhead; it is a strenuous five-mile round trip taking four to five hours, starting near 8,500 feet and gaining 1,957 feet. Snow, weather, altitude, and lightning require trip-specific checks.",
      "observation_id": "observation-nps-lassen-peak-trail-20260923",
      "observed_at": null,
      "observer": "",
      "retrieved_at": "2026-09-23T03:30:00+00:00",
      "source_id": "source-nps-lassen-peak-trail"
    }
  ],
  "record": {
    "locator": "https://www.nps.gov/thingstodo/hikelassenpeak.htm",
    "publisher": "National Park Service",
    "source_id": "source-nps-lassen-peak-trail"
  },
  "record_type": "source",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.nps.gov/thingstodo/hikelassenpeak.htm",
      "publisher": "National Park Service",
      "source_id": "source-nps-lassen-peak-trail"
    }
  ]
}