{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-chilnualna-falls-observed-closure-20260925",
        "evidence_ids": [
          "evidence-chilnualna-falls-observed-closure-20260925"
        ],
        "predicate": "observed_operational_status",
        "spatial_scope_ids": [
          "scope-wawona"
        ],
        "subject_id": "route-chilnualna-falls",
        "temporal_scope": null,
        "value": {
          "also_applies_to": "trails from the top toward Buena Vista and Crescent Lakes",
          "as_of": "2026-09-25",
          "reason": "Dome Fire",
          "recheck_required": true,
          "status": "closed"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-chilnualna-falls-observed-closure-20260925",
          "evidence_id": "evidence-chilnualna-falls-observed-closure-20260925",
          "notes": "",
          "observation_id": "observation-nps-yosemite-wawona-conditions-20260925",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "As of September 25, 2026, NPS reports the Chilnualna Falls trail and connected trails toward Buena Vista and Crescent Lakes closed due to the Dome Fire; smoke and air-quality impacts remain possible. This is dated operational evidence, not a timeless rule.",
          "observation_id": "observation-nps-yosemite-wawona-conditions-20260925",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-25T00:00:00+00:00",
          "source_id": "source-nps-yosemite-conditions"
        }
      ],
      "sources": [
        {
          "locator": "https://www.nps.gov/yose/planyourvisit/conditions.htm",
          "publisher": "National Park Service",
          "source_id": "source-nps-yosemite-conditions"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-glacier-point-road-observed-status-20260925",
        "evidence_ids": [
          "evidence-glacier-point-road-observed-status-20260925"
        ],
        "predicate": "observed_operational_status",
        "spatial_scope_ids": [
          "scope-glacier-point-road-corridor"
        ],
        "subject_id": "place-glacier-point-road-corridor",
        "temporal_scope": null,
        "value": {
          "as_of": "2026-09-25",
          "ostrander_lake_trail": "closed due to Dome Fire",
          "reason": "smoke and firefighting operations",
          "recheck_required": true,
          "status": "temporarily closed"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-glacier-point-road-observed-status-20260925",
          "evidence_id": "evidence-glacier-point-road-observed-status-20260925",
          "notes": "",
          "observation_id": "observation-nps-yosemite-glacier-point-conditions-20260925",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "As of September 25, 2026, NPS reports Glacier Point Road temporarily closed for smoke and firefighting operations and the Ostrander Lake Trail and areas south of it closed due to the Dome Fire. This is dated evidence.",
          "observation_id": "observation-nps-yosemite-glacier-point-conditions-20260925",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-25T00:00:00+00:00",
          "source_id": "source-nps-yosemite-conditions"
        }
      ],
      "sources": [
        {
          "locator": "https://www.nps.gov/yose/planyourvisit/conditions.htm",
          "publisher": "National Park Service",
          "source_id": "source-nps-yosemite-conditions"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-hetch-hetchy-observed-status-20260925",
        "evidence_ids": [
          "evidence-hetch-hetchy-observed-status-20260925"
        ],
        "predicate": "observed_operational_status",
        "spatial_scope_ids": [
          "scope-hetch-hetchy"
        ],
        "subject_id": "place-hetch-hetchy",
        "temporal_scope": null,
        "value": {
          "as_of": "2026-09-25",
          "recheck_required": true,
          "trail_closures": "none listed"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-hetch-hetchy-observed-status-20260925",
          "evidence_id": "evidence-hetch-hetchy-observed-status-20260925",
          "notes": "",
          "observation_id": "observation-nps-yosemite-hetch-hetchy-conditions-20260925",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "As of September 25, 2026, NPS lists no Hetch Hetchy-area trail closures while retaining daylight road operations and general wildfire uncertainty; this is dated evidence.",
          "observation_id": "observation-nps-yosemite-hetch-hetchy-conditions-20260925",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-25T00:00:00+00:00",
          "source_id": "source-nps-yosemite-conditions"
        }
      ],
      "sources": [
        {
          "locator": "https://www.nps.gov/yose/planyourvisit/conditions.htm",
          "publisher": "National Park Service",
          "source_id": "source-nps-yosemite-conditions"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-tioga-road-observed-status-20260925",
        "evidence_ids": [
          "evidence-tioga-road-observed-status-20260925"
        ],
        "predicate": "observed_operational_status",
        "spatial_scope_ids": [
          "scope-tioga-road-corridor"
        ],
        "subject_id": "place-tioga-road-corridor",
        "temporal_scope": null,
        "value": {
          "as_of": "2026-09-25",
          "construction_delays": true,
          "recheck_required": true,
          "road": "open"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-tioga-road-observed-status-20260925",
          "evidence_id": "evidence-tioga-road-observed-status-20260925",
          "notes": "",
          "observation_id": "observation-nps-yosemite-west-tioga-conditions-20260925",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "As of September 25, 2026, Tioga Road is open with published construction delays and the wilderness-center-to-Lembert-Dome trail has an alternate route; conditions remain volatile.",
          "observation_id": "observation-nps-yosemite-west-tioga-conditions-20260925",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-25T00:00:00+00:00",
          "source_id": "source-nps-yosemite-conditions"
        }
      ],
      "sources": [
        {
          "locator": "https://www.nps.gov/yose/planyourvisit/conditions.htm",
          "publisher": "National Park Service",
          "source_id": "source-nps-yosemite-conditions"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-tuolumne-current-access-20260925",
        "evidence_ids": [
          "evidence-tuolumne-current-access-20260925"
        ],
        "predicate": "dated_operational_status",
        "spatial_scope_ids": [
          "scope-tuolumne-meadows"
        ],
        "subject_id": "place-tuolumne-meadows",
        "temporal_scope": {
          "ends_on": "2026-09-25",
          "starts_on": "2026-09-25"
        },
        "value": {
          "alternate_trail": "available",
          "as_of": "2026-09-25",
          "olmsted_point_to_tioga_pass_weekday_delay_minutes": 15,
          "requires_current_recheck": true,
          "tioga_road": "open",
          "tuolumne_meadows_delay_minutes": 10,
          "wilderness_center_to_lembert_trail": "closed_for_construction"
        }
      },
      "evidence": [
        {
          "claim_id": "claim-tuolumne-current-access-20260925",
          "evidence_id": "evidence-tuolumne-current-access-20260925",
          "notes": "",
          "observation_id": "observation-nps-yosemite-tuolumne-conditions-20260925",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "On September 25, 2026 the NPS current-conditions page showed Tioga Road open with Tuolumne/Olmsted-to-Tioga delays and a construction closure of the trail between the wilderness center and Lembert Dome, with an alternate trail available.",
          "observation_id": "observation-nps-yosemite-tuolumne-conditions-20260925",
          "observed_at": "2026-09-25T00:00:00+00:00",
          "observer": "",
          "retrieved_at": "2026-09-25T00:00:00+00:00",
          "source_id": "source-nps-yosemite-conditions"
        }
      ],
      "sources": [
        {
          "locator": "https://www.nps.gov/yose/planyourvisit/conditions.htm",
          "publisher": "National Park Service",
          "source_id": "source-nps-yosemite-conditions"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-yosemite-current-conditions-recheck",
        "evidence_ids": [
          "evidence-yosemite-current-conditions-recheck"
        ],
        "predicate": "current_conditions_source",
        "spatial_scope_ids": [
          "scope-yosemite-national-park"
        ],
        "subject_id": "park-yosemite-national-park",
        "temporal_scope": null,
        "value": {
          "requires_current_check": true,
          "topics": [
            "roads",
            "trails",
            "fire",
            "campgrounds",
            "facilities",
            "areas"
          ]
        }
      },
      "evidence": [
        {
          "claim_id": "claim-yosemite-current-conditions-recheck",
          "evidence_id": "evidence-yosemite-current-conditions-recheck",
          "notes": "Live NPS status source; revisit near departure.",
          "observation_id": "observation-nps-yosemite-conditions-20260922",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "The Yosemite current-conditions page publishes changing road, trail, fire, campground, facility, and area closures and directs visitors to call for the most current road status because the page reflects only planned or long-term closures.",
          "observation_id": "observation-nps-yosemite-conditions-20260922",
          "observed_at": "2026-09-18T00:00:00+00:00",
          "observer": "NPS",
          "retrieved_at": "2026-09-22T18:00:00+00:00",
          "source_id": "source-nps-yosemite-conditions"
        }
      ],
      "sources": [
        {
          "locator": "https://www.nps.gov/yose/planyourvisit/conditions.htm",
          "publisher": "National Park Service",
          "source_id": "source-nps-yosemite-conditions"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "park-yosemite-national-park",
      "kind": "national_park",
      "name": "Yosemite National Park"
    },
    {
      "entity_id": "place-glacier-point-road-corridor",
      "kind": "place",
      "name": "Glacier Point Road Corridor"
    },
    {
      "entity_id": "place-hetch-hetchy",
      "kind": "place",
      "name": "Hetch Hetchy Valley"
    },
    {
      "entity_id": "place-tioga-road-corridor",
      "kind": "place",
      "name": "Tioga Road Corridor"
    },
    {
      "entity_id": "place-tuolumne-meadows",
      "kind": "place",
      "name": "Tuolumne Meadows"
    },
    {
      "entity_id": "route-chilnualna-falls",
      "kind": "route",
      "name": "Chilnualna Falls"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260922-yosemite-nps-foundation",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/sources/source-nps-yosemite-conditions.json",
      "reason": "Publish a source-backed Yosemite National Park planning foundation from current official NPS pages.",
      "record_id": "source-nps-yosemite-conditions",
      "record_type": "source",
      "summary": "Add a source-backed Yosemite planning foundation with actionable wilderness requirements, current-condition rechecks, party-dependent fees, access, camping, and preserved uncertainty."
    }
  ],
  "navigation": {
    "next_id": "source-nps-yosemite-crane-flat-white-wolf-hikes",
    "position": 228,
    "previous_id": "source-nps-yosemite-campgrounds",
    "total": 587
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "The Yosemite current-conditions page publishes changing road, trail, fire, campground, facility, and area closures and directs visitors to call for the most current road status because the page reflects only planned or long-term closures.",
      "observation_id": "observation-nps-yosemite-conditions-20260922",
      "observed_at": "2026-09-18T00:00:00+00:00",
      "observer": "NPS",
      "retrieved_at": "2026-09-22T18:00:00+00:00",
      "source_id": "source-nps-yosemite-conditions"
    },
    {
      "artifact_refs": [],
      "content": "As of September 25, 2026, NPS reports Glacier Point Road temporarily closed for smoke and firefighting operations and the Ostrander Lake Trail and areas south of it closed due to the Dome Fire. This is dated evidence.",
      "observation_id": "observation-nps-yosemite-glacier-point-conditions-20260925",
      "observed_at": null,
      "observer": "",
      "retrieved_at": "2026-09-25T00:00:00+00:00",
      "source_id": "source-nps-yosemite-conditions"
    },
    {
      "artifact_refs": [],
      "content": "As of September 25, 2026, NPS lists no Hetch Hetchy-area trail closures while retaining daylight road operations and general wildfire uncertainty; this is dated evidence.",
      "observation_id": "observation-nps-yosemite-hetch-hetchy-conditions-20260925",
      "observed_at": null,
      "observer": "",
      "retrieved_at": "2026-09-25T00:00:00+00:00",
      "source_id": "source-nps-yosemite-conditions"
    },
    {
      "artifact_refs": [],
      "content": "On September 25, 2026 the NPS current-conditions page showed Tioga Road open with Tuolumne/Olmsted-to-Tioga delays and a construction closure of the trail between the wilderness center and Lembert Dome, with an alternate trail available.",
      "observation_id": "observation-nps-yosemite-tuolumne-conditions-20260925",
      "observed_at": "2026-09-25T00:00:00+00:00",
      "observer": "",
      "retrieved_at": "2026-09-25T00:00:00+00:00",
      "source_id": "source-nps-yosemite-conditions"
    },
    {
      "artifact_refs": [],
      "content": "As of September 25, 2026, NPS reports the Chilnualna Falls trail and connected trails toward Buena Vista and Crescent Lakes closed due to the Dome Fire; smoke and air-quality impacts remain possible. This is dated operational evidence, not a timeless rule.",
      "observation_id": "observation-nps-yosemite-wawona-conditions-20260925",
      "observed_at": null,
      "observer": "",
      "retrieved_at": "2026-09-25T00:00:00+00:00",
      "source_id": "source-nps-yosemite-conditions"
    },
    {
      "artifact_refs": [],
      "content": "As of September 25, 2026, Tioga Road is open with published construction delays and the wilderness-center-to-Lembert-Dome trail has an alternate route; conditions remain volatile.",
      "observation_id": "observation-nps-yosemite-west-tioga-conditions-20260925",
      "observed_at": null,
      "observer": "",
      "retrieved_at": "2026-09-25T00:00:00+00:00",
      "source_id": "source-nps-yosemite-conditions"
    }
  ],
  "record": {
    "locator": "https://www.nps.gov/yose/planyourvisit/conditions.htm",
    "publisher": "National Park Service",
    "source_id": "source-nps-yosemite-conditions"
  },
  "record_type": "source",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.nps.gov/yose/planyourvisit/conditions.htm",
      "publisher": "National Park Service",
      "source_id": "source-nps-yosemite-conditions"
    }
  ]
}