{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-del-valle-ohlone-gateway",
        "evidence_ids": [
          "evidence-del-valle-ohlone-gateway",
          "evidence-del-valle-ebrpd-ohlone-gateway",
          "evidence-ebrpd-ohlone-gateway-current"
        ],
        "predicate": "eastern_gateway",
        "spatial_scope_ids": [
          "scope-del-valle-park"
        ],
        "subject_id": "trail-ohlone-wilderness",
        "temporal_scope": null,
        "value": "park-del-valle-regional-park"
      },
      "evidence": [
        {
          "claim_id": "claim-del-valle-ohlone-gateway",
          "evidence_id": "evidence-del-valle-ohlone-gateway",
          "notes": "",
          "observation_id": "observation-del-valle-ohlone-permit-statement",
          "stance": "supports"
        },
        {
          "claim_id": "claim-del-valle-ohlone-gateway",
          "evidence_id": "evidence-del-valle-ebrpd-ohlone-gateway",
          "notes": "",
          "observation_id": "observation-del-valle-ebrpd-identity",
          "stance": "supports"
        },
        {
          "claim_id": "claim-del-valle-ohlone-gateway",
          "evidence_id": "evidence-ebrpd-ohlone-gateway-current",
          "notes": "",
          "observation_id": "observation-ebrpd-ohlone-trail",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "The page calls Del Valle the eastern gateway to the Ohlone Wilderness Trail, describes the trail as 28 miles connecting to Sunol and Mission Peak, and states that permits are required on portions and may be purchased at the park entrance kiosk; it separately states that backpack reservations remain available.",
          "observation_id": "observation-del-valle-ohlone-permit-statement",
          "observed_at": null,
          "observer": "user-supplied page transcription",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-reserveamerica-del-valle-overview-110003"
        },
        {
          "artifact_refs": [],
          "content": "The EBRPD page places Del Valle ten miles south of Livermore, describes a five-mile lake in a 4,395-acre park, gives the address 7000 Del Valle Road, and calls the park the eastern gateway to the 28-mile Ohlone Wilderness Trail.",
          "observation_id": "observation-del-valle-ebrpd-identity",
          "observed_at": null,
          "observer": "user-supplied page transcription",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-ebrpd-del-valle-park-page"
        },
        {
          "artifact_refs": [],
          "content": "The 28-mile Ohlone Wilderness Trail is open to hikers and equestrians, not bicycles or motor vehicles, and crosses Ohlone Wilderness, Mission Peak, Sunol, Del Valle, and leased watershed lands where users must stay in the trail corridor.",
          "observation_id": "observation-ebrpd-ohlone-trail",
          "observed_at": null,
          "observer": "Wayproof source review",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-ebrpd-ohlone-park-page"
        }
      ],
      "sources": [
        {
          "locator": "https://www.reserveamerica.com/explore/del-valle/EB/110003/overview",
          "publisher": "ReserveAmerica / East Bay Regional Park District",
          "source_id": "source-reserveamerica-del-valle-overview-110003"
        },
        {
          "locator": "https://www.ebparks.org/parks/del-valle",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-del-valle-park-page"
        },
        {
          "locator": "https://www.ebparks.org/parks/ohlone",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-ohlone-park-page"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-ohlone-trail-traversed-parks",
        "evidence_ids": [
          "evidence-ohlone-trail-traversed-parks"
        ],
        "predicate": "traversed_parks",
        "spatial_scope_ids": [
          "scope-ohlone-wilderness-trail"
        ],
        "subject_id": "trail-ohlone-wilderness",
        "temporal_scope": null,
        "value": [
          "park-ohlone-wilderness-regional-preserve",
          "park-mission-peak-regional-preserve",
          "park-sunol-wilderness-regional-preserve",
          "park-del-valle-regional-park"
        ]
      },
      "evidence": [
        {
          "claim_id": "claim-ohlone-trail-traversed-parks",
          "evidence_id": "evidence-ohlone-trail-traversed-parks",
          "notes": "",
          "observation_id": "observation-ebrpd-ohlone-trail",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "The 28-mile Ohlone Wilderness Trail is open to hikers and equestrians, not bicycles or motor vehicles, and crosses Ohlone Wilderness, Mission Peak, Sunol, Del Valle, and leased watershed lands where users must stay in the trail corridor.",
          "observation_id": "observation-ebrpd-ohlone-trail",
          "observed_at": null,
          "observer": "Wayproof source review",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-ebrpd-ohlone-park-page"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/parks/ohlone",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-ohlone-park-page"
        }
      ]
    },
    {
      "claim": {
        "claim_id": "claim-ohlone-trail-use",
        "evidence_ids": [
          "evidence-ohlone-trail-use",
          "evidence-ohlone-map-trail-use"
        ],
        "predicate": "trail_use",
        "spatial_scope_ids": [
          "scope-ohlone-wilderness-trail"
        ],
        "subject_id": "trail-ohlone-wilderness",
        "temporal_scope": null,
        "value": {
          "bicycles": false,
          "distance_miles": 28,
          "equestrians": true,
          "hikers": true,
          "motor_vehicles": false
        }
      },
      "evidence": [
        {
          "claim_id": "claim-ohlone-trail-use",
          "evidence_id": "evidence-ohlone-trail-use",
          "notes": "",
          "observation_id": "observation-ebrpd-ohlone-trail",
          "stance": "supports"
        },
        {
          "claim_id": "claim-ohlone-trail-use",
          "evidence_id": "evidence-ohlone-map-trail-use",
          "notes": "",
          "observation_id": "observation-ohlone-map-restrictions",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [],
          "content": "The 28-mile Ohlone Wilderness Trail is open to hikers and equestrians, not bicycles or motor vehicles, and crosses Ohlone Wilderness, Mission Peak, Sunol, Del Valle, and leased watershed lands where users must stay in the trail corridor.",
          "observation_id": "observation-ebrpd-ohlone-trail",
          "observed_at": null,
          "observer": "Wayproof source review",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-ebrpd-ohlone-park-page"
        },
        {
          "artifact_refs": [
            "PDF page 1"
          ],
          "content": "The map repeatedly says stay on trail and no bicycles, identifies the Ohlone Wilderness Trail for hikers and horses only, and marks service roads and land-bank areas as no access. It requires staying on the trail in San Francisco Water Department land.",
          "observation_id": "observation-ohlone-map-restrictions",
          "observed_at": "2025-08-01T00:00:00+00:00",
          "observer": "Wayproof source review",
          "retrieved_at": "2026-09-20T00:00:00+00:00",
          "source_id": "source-ebrpd-ohlone-wilderness-map-2025-08"
        }
      ],
      "sources": [
        {
          "locator": "https://www.ebparks.org/parks/ohlone",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-ohlone-park-page"
        },
        {
          "locator": "https://www.ebparks.org/sites/default/files/Ohlone-Wilderness-Permit-Map-11x17.pdf",
          "publisher": "East Bay Regional Park District",
          "source_id": "source-ebrpd-ohlone-wilderness-map-2025-08"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "trail-ohlone-wilderness",
      "kind": "trail",
      "name": "Ohlone Wilderness Trail"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260920-ebrpd-ohlone-park-page",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/observations/observation-ebrpd-ohlone-trail.json",
      "reason": "Add the official Ohlone preserve page, resolve the 2026 permit change, and date volatile water status.",
      "record_id": "observation-ebrpd-ohlone-trail",
      "record_type": "observation",
      "summary": "Ingest the official Ohlone preserve page, resolve the obsolete permit ambiguity, and preserve dated water availability."
    }
  ],
  "navigation": {
    "next_id": "observation-ebrpd-ohlone-water-20260919",
    "position": 125,
    "previous_id": "observation-ebrpd-ohlone-permit-2026",
    "total": 1318
  },
  "observations": [
    {
      "artifact_refs": [],
      "content": "The 28-mile Ohlone Wilderness Trail is open to hikers and equestrians, not bicycles or motor vehicles, and crosses Ohlone Wilderness, Mission Peak, Sunol, Del Valle, and leased watershed lands where users must stay in the trail corridor.",
      "observation_id": "observation-ebrpd-ohlone-trail",
      "observed_at": null,
      "observer": "Wayproof source review",
      "retrieved_at": "2026-09-20T00:00:00+00:00",
      "source_id": "source-ebrpd-ohlone-park-page"
    }
  ],
  "record": {
    "artifact_refs": [],
    "content": "The 28-mile Ohlone Wilderness Trail is open to hikers and equestrians, not bicycles or motor vehicles, and crosses Ohlone Wilderness, Mission Peak, Sunol, Del Valle, and leased watershed lands where users must stay in the trail corridor.",
    "observation_id": "observation-ebrpd-ohlone-trail",
    "observed_at": null,
    "observer": "Wayproof source review",
    "retrieved_at": "2026-09-20T00:00:00+00:00",
    "source_id": "source-ebrpd-ohlone-park-page"
  },
  "record_type": "observation",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.ebparks.org/parks/ohlone",
      "publisher": "East Bay Regional Park District",
      "source_id": "source-ebrpd-ohlone-park-page"
    }
  ]
}