{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-bumpass-hell-basin-route-description",
        "evidence_ids": [
          "evidence-bumpass-hell-basin-route-description"
        ],
        "predicate": "published_route_description",
        "spatial_scope_ids": [
          "scope-route-bumpass-hell-trail"
        ],
        "subject_id": "route-bumpass-hell-trail",
        "temporal_scope": null,
        "value": {
          "basin_boardwalk": true,
          "kings_creek_access_alternative": true,
          "most_hikers_return_from_second_overlook": true,
          "second_basin_overlook_route": true,
          "usual_destination": "hydrothermal-area-bumpass-hell",
          "usual_start": "trailhead-bumpass-hell"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-bumpass-hell-basin-route-description",
          "evidence_id": "evidence-bumpass-hell-basin-route-description",
          "notes": "",
          "observation_id": "observation-nps-lassen-bumpass-hell-detail-20260923",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "NPS describes the usual Bumpass Hell hike as a three-mile round trip from the Bumpass Hell parking area: the first mile is mostly flat, the trail then drops into the basin, and a boardwalk provides close views. A second trail skirts the north edge and continues to a second overlook; most hikers return from there. The page also says the basin is accessible by a trail from Kings Creek. Within the same page, the parking area is described as both seven and eight miles from the Southwest Entrance, duration as two hours and 90 minutes, descent as 200 and 300 feet, and surface as packed gravel and hardpacked dirt and rock.",
          "observation_id": "observation-nps-lassen-bumpass-hell-detail-20260923",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-23T21:00:00+00:00",
          "source_id": "source-nps-lassen-bumpass-hell-trail"
        }
      ],
      "sources": [
        {
          "locator": "https://www.nps.gov/thingstodo/hikebumpasshell.htm",
          "publisher": "National Park Service",
          "source_id": "source-nps-lassen-bumpass-hell-trail"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-bumpass-hell-source-profile-variations",
        "evidence_ids": [
          "evidence-bumpass-hell-source-profile-variations"
        ],
        "predicate": "source_page_profile_variations",
        "spatial_scope_ids": [
          "scope-route-bumpass-hell-trail"
        ],
        "subject_id": "route-bumpass-hell-trail",
        "temporal_scope": null,
        "value": {
          "descent_feet": [
            200,
            300
          ],
          "duration_minutes": [
            90,
            120
          ],
          "southwest_entrance_distance_miles": [
            7,
            8
          ],
          "surface_descriptions": [
            "packed gravel",
            "hardpacked dirt and rock"
          ]
        }
      },
      "evidence": [
        {
          "claim_id": "claim-bumpass-hell-source-profile-variations",
          "evidence_id": "evidence-bumpass-hell-source-profile-variations",
          "notes": "",
          "observation_id": "observation-nps-lassen-bumpass-hell-detail-20260923",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "NPS describes the usual Bumpass Hell hike as a three-mile round trip from the Bumpass Hell parking area: the first mile is mostly flat, the trail then drops into the basin, and a boardwalk provides close views. A second trail skirts the north edge and continues to a second overlook; most hikers return from there. The page also says the basin is accessible by a trail from Kings Creek. Within the same page, the parking area is described as both seven and eight miles from the Southwest Entrance, duration as two hours and 90 minutes, descent as 200 and 300 feet, and surface as packed gravel and hardpacked dirt and rock.",
          "observation_id": "observation-nps-lassen-bumpass-hell-detail-20260923",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-23T21:00:00+00:00",
          "source_id": "source-nps-lassen-bumpass-hell-trail"
        }
      ],
      "sources": [
        {
          "locator": "https://www.nps.gov/thingstodo/hikebumpasshell.htm",
          "publisher": "National Park Service",
          "source_id": "source-nps-lassen-bumpass-hell-trail"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-bumpass-hell-trail-profile",
        "evidence_ids": [
          "evidence-bumpass-hell-trail-profile"
        ],
        "predicate": "published_route_profile",
        "spatial_scope_ids": [
          "scope-route-bumpass-hell-trail"
        ],
        "subject_id": "route-bumpass-hell-trail",
        "temporal_scope": null,
        "value": {
          "elevation_range_ft": [
            8200,
            8400
          ],
          "parking": "limited and often full mid-morning to early afternoon",
          "round_trip_miles": 3,
          "round_trip_time_hours": 2,
          "typical_season": "approximately late July through October"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-bumpass-hell-trail-profile",
          "evidence_id": "evidence-bumpass-hell-trail-profile",
          "notes": "",
          "observation_id": "observation-nps-lassen-bumpass-hell-trail-20260923",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "Bumpass Hell Trail starts at Bumpass Hell parking seven miles from the Southwest Entrance; it is a three-mile round trip taking about two hours and is generally available only in late summer and fall. Parking is limited.",
          "observation_id": "observation-nps-lassen-bumpass-hell-trail-20260923",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-23T03:30:00+00:00",
          "source_id": "source-nps-lassen-bumpass-hell-trail"
        }
      ],
      "sources": [
        {
          "locator": "https://www.nps.gov/thingstodo/hikebumpasshell.htm",
          "publisher": "National Park Service",
          "source_id": "source-nps-lassen-bumpass-hell-trail"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "route-bumpass-hell-trail",
      "kind": "route",
      "name": "Bumpass Hell 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-bumpass-hell-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-bumpass-hell-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-camping",
    "position": 198,
    "previous_id": "source-nps-lassen-brokeoff-trail",
    "total": 587
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "NPS describes the usual Bumpass Hell hike as a three-mile round trip from the Bumpass Hell parking area: the first mile is mostly flat, the trail then drops into the basin, and a boardwalk provides close views. A second trail skirts the north edge and continues to a second overlook; most hikers return from there. The page also says the basin is accessible by a trail from Kings Creek. Within the same page, the parking area is described as both seven and eight miles from the Southwest Entrance, duration as two hours and 90 minutes, descent as 200 and 300 feet, and surface as packed gravel and hardpacked dirt and rock.",
      "observation_id": "observation-nps-lassen-bumpass-hell-detail-20260923",
      "observed_at": null,
      "observer": "",
      "retrieved_at": "2026-09-23T21:00:00+00:00",
      "source_id": "source-nps-lassen-bumpass-hell-trail"
    },
    {
      "artifact_refs": [],
      "content": "Bumpass Hell Trail starts at Bumpass Hell parking seven miles from the Southwest Entrance; it is a three-mile round trip taking about two hours and is generally available only in late summer and fall. Parking is limited.",
      "observation_id": "observation-nps-lassen-bumpass-hell-trail-20260923",
      "observed_at": null,
      "observer": "",
      "retrieved_at": "2026-09-23T03:30:00+00:00",
      "source_id": "source-nps-lassen-bumpass-hell-trail"
    }
  ],
  "record": {
    "locator": "https://www.nps.gov/thingstodo/hikebumpasshell.htm",
    "publisher": "National Park Service",
    "source_id": "source-nps-lassen-bumpass-hell-trail"
  },
  "record_type": "source",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.nps.gov/thingstodo/hikebumpasshell.htm",
      "publisher": "National Park Service",
      "source_id": "source-nps-lassen-bumpass-hell-trail"
    }
  ]
}