{
  "claims": [
    {
      "claim": {
        "claim_id": "claim-trailhead-horseshoe-lake-operational-profile",
        "evidence_ids": [
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          "evidence-trailhead-horseshoe-lake-operational-profile-town"
        ],
        "predicate": "trailhead_operational_profile",
        "spatial_scope_ids": [],
        "subject_id": "trailhead-horseshoe-lake-mammoth",
        "temporal_scope": null,
        "value": {
          "parking": {
            "capacity": "unknown",
            "overflow": "unknown",
            "present": true
          },
          "potable_water": {
            "status": "unknown"
          },
          "road_access": {
            "surface": "paved"
          },
          "route_connector": {
            "description": "Official map and Town plan depict trail access from the established trailhead and parking lot.",
            "exact_geometry": "unresolved",
            "status": "depicted"
          },
          "toilets": {
            "present": true,
            "type": "unknown"
          }
        }
      },
      "evidence": [
        {
          "claim_id": "claim-trailhead-horseshoe-lake-operational-profile",
          "evidence_id": "evidence-trailhead-horseshoe-lake-operational-profile-usfs",
          "notes": "",
          "observation_id": "observation-horseshoe-lake-trailhead-operations-20260925",
          "stance": "supports"
        },
        {
          "claim_id": "claim-trailhead-horseshoe-lake-operational-profile",
          "evidence_id": "evidence-trailhead-horseshoe-lake-operational-profile-town",
          "notes": "",
          "observation_id": "observation-town-horseshoe-lake-trailhead-operations-20260925",
          "stance": "supports"
        }
      ],
      "observations": [
        {
          "artifact_refs": [
            "Mammoth Lakes area map"
          ],
          "content": "The official Forest Service map depicts Mammoth Pass Trailhead at Horseshoe Lake on a paved-road approach; the map states that trailheads have restrooms unless marked otherwise, and this trailhead is not marked NO RR. The map does not publish parking capacity, overflow arrangements, or potable-water service.",
          "observation_id": "observation-horseshoe-lake-trailhead-operations-20260925",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-25T22:00:00+00:00",
          "source_id": "source-usfs-mammoth-lakes-area-map"
        },
        {
          "artifact_refs": [
            "Mammoth Lakes Walk, Bike, Ride draft 1.0"
          ],
          "content": "The Town plan identifies the existing Horseshoe Lake trailhead and parking lot with trail and vehicular access. The conceptual hub diagram also identifies restrooms. It does not publish parking capacity, overflow arrangements, or potable-water service.",
          "observation_id": "observation-town-horseshoe-lake-trailhead-operations-20260925",
          "observed_at": null,
          "observer": "",
          "retrieved_at": "2026-09-25T22:00:00+00:00",
          "source_id": "source-town-mammoth-lakes-walk-bike-ride-2017"
        }
      ],
      "sources": [
        {
          "locator": "https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/fseprd1173411.pdf",
          "publisher": "USDA Forest Service",
          "source_id": "source-usfs-mammoth-lakes-area-map"
        },
        {
          "locator": "https://www.townofmammothlakes.ca.gov/DocumentCenter/View/6459/20170302_MammothLakes_WalkBikeRide_Draft10?bidId=",
          "publisher": "Town of Mammoth Lakes",
          "source_id": "source-town-mammoth-lakes-walk-bike-ride-2017"
        }
      ]
    }
  ],
  "entities": [
    {
      "entity_id": "trailhead-horseshoe-lake-mammoth",
      "kind": "trailhead",
      "name": "Horseshoe Lake Trailhead"
    }
  ],
  "history": [
    {
      "action": "ADD",
      "change_set_id": "wp-20260925-eastern-sierra-trailhead-operations",
      "evidence_refs": [
        "evidence-trailhead-horseshoe-lake-operational-profile-usfs",
        "evidence-trailhead-horseshoe-lake-operational-profile-town"
      ],
      "knowledge_gap_refs": [],
      "path": "canonical/v0/claims/claim-trailhead-horseshoe-lake-operational-profile.json",
      "reason": "Publish evidence-bounded Eastern Sierra trailhead operational profiles",
      "record_id": "claim-trailhead-horseshoe-lake-operational-profile",
      "record_type": "claim",
      "summary": "Publish operational profiles for six high-value Eastern Sierra trailheads"
    }
  ],
  "navigation": {
    "next_id": "claim-trailhead-horseshoe-lake-trip-status-20260925",
    "position": 3453,
    "previous_id": "claim-trailhead-horseshoe-lake-mammoth-map-point",
    "total": 3965
  },
  "observations": [
    {
      "artifact_refs": [
        "Mammoth Lakes area map"
      ],
      "content": "The official Forest Service map depicts Mammoth Pass Trailhead at Horseshoe Lake on a paved-road approach; the map states that trailheads have restrooms unless marked otherwise, and this trailhead is not marked NO RR. The map does not publish parking capacity, overflow arrangements, or potable-water service.",
      "observation_id": "observation-horseshoe-lake-trailhead-operations-20260925",
      "observed_at": null,
      "observer": "",
      "retrieved_at": "2026-09-25T22:00:00+00:00",
      "source_id": "source-usfs-mammoth-lakes-area-map"
    },
    {
      "artifact_refs": [
        "Mammoth Lakes Walk, Bike, Ride draft 1.0"
      ],
      "content": "The Town plan identifies the existing Horseshoe Lake trailhead and parking lot with trail and vehicular access. The conceptual hub diagram also identifies restrooms. It does not publish parking capacity, overflow arrangements, or potable-water service.",
      "observation_id": "observation-town-horseshoe-lake-trailhead-operations-20260925",
      "observed_at": null,
      "observer": "",
      "retrieved_at": "2026-09-25T22:00:00+00:00",
      "source_id": "source-town-mammoth-lakes-walk-bike-ride-2017"
    }
  ],
  "record": {
    "claim_id": "claim-trailhead-horseshoe-lake-operational-profile",
    "evidence_ids": [
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      "evidence-trailhead-horseshoe-lake-operational-profile-town"
    ],
    "predicate": "trailhead_operational_profile",
    "spatial_scope_ids": [],
    "subject_id": "trailhead-horseshoe-lake-mammoth",
    "temporal_scope": null,
    "value": {
      "parking": {
        "capacity": "unknown",
        "overflow": "unknown",
        "present": true
      },
      "potable_water": {
        "status": "unknown"
      },
      "road_access": {
        "surface": "paved"
      },
      "route_connector": {
        "description": "Official map and Town plan depict trail access from the established trailhead and parking lot.",
        "exact_geometry": "unresolved",
        "status": "depicted"
      },
      "toilets": {
        "present": true,
        "type": "unknown"
      }
    }
  },
  "record_type": "claim",
  "related_records": [],
  "sources": [
    {
      "locator": "https://www.townofmammothlakes.ca.gov/DocumentCenter/View/6459/20170302_MammothLakes_WalkBikeRide_Draft10?bidId=",
      "publisher": "Town of Mammoth Lakes",
      "source_id": "source-town-mammoth-lakes-walk-bike-ride-2017"
    },
    {
      "locator": "https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/fseprd1173411.pdf",
      "publisher": "USDA Forest Service",
      "source_id": "source-usfs-mammoth-lakes-area-map"
    }
  ]
}