{
  "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-del-valle-ohlone-permit-page-statement",
        "evidence_ids": [
          "evidence-del-valle-ohlone-permit-page-statement"
        ],
        "predicate": "published_permit_statement",
        "spatial_scope_ids": [
          "scope-del-valle-park"
        ],
        "subject_id": "trail-ohlone-wilderness",
        "temporal_scope": {
          "ends_on": "2025-12-31",
          "starts_on": null
        },
        "value": "The ReserveAmerica overview states that a permit is required on portions of the trail."
      },
      "evidence": [
        {
          "claim_id": "claim-del-valle-ohlone-permit-page-statement",
          "evidence_id": "evidence-del-valle-ohlone-permit-page-statement",
          "notes": "",
          "observation_id": "observation-del-valle-ohlone-permit-statement",
          "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"
        }
      ],
      "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"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "trail-ohlone-wilderness",
      "kind": "trail",
      "name": "Ohlone Wilderness Trail"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260920-del-valle-reserveamerica-foundation",
      "evidence_refs": [],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/observations/observation-del-valle-ohlone-permit-statement.json",
      "reason": "Establish the source-backed Del Valle foundation from the supplied ReserveAmerica overview.",
      "record_id": "observation-del-valle-ohlone-permit-statement",
      "record_type": "observation",
      "summary": "Establish Del Valle park and family-campground knowledge from the ReserveAmerica overview while preserving inventory, permit, and operational-condition uncertainty."
    }
  ],
  "navigation": {
    "next_id": "observation-del-valle-picnic-access",
    "position": 38,
    "previous_id": "observation-del-valle-nonfamily-reservation-details",
    "total": 1318
  },
  "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"
    }
  ],
  "record": {
    "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"
  },
  "record_type": "observation",
  "related_records": [],
  "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"
    }
  ]
}