Correction
Ohio State Parks and Watercraft Lands
Corrected the campground wording to distinguish exclusion from the automatically permitted category from a categorical prohibition.
Public history
Public updates
Dated changes to answers, restrictions, and official-source details. Routine checks are not listed here.
Correction
Ohio State Parks and Watercraft Lands
Clarified that eligible sand-beach and qualifying mowed areas do not require written permission, while other areas require written area-manager permission.
Correction
Michigan State Parks and Recreation Areas
Clarified that no separate authorization is stated for DNR-designated open areas and that written authorization is required outside those areas.
Correction
Metroparks Toledo
Removed the misleading designated-area wording and aligned the answer with the direct Metroparks Toledo prohibition.
Restriction updated
Algonac State Park
Added the property-level condition that only registered campers may metal detect in campground areas.
Restriction updated
Porcupine Mountains Wilderness State Park
Added the property-level condition that only registered campers may metal detect in campground areas while retaining the current map as the open-area boundary.
Correction
Ohio State Parks and Watercraft Lands
Reordered official-source presentation so the administrative rule that directly establishes the answer is shown first.
Conclusion updated
Grand Haven State Park
The answer now reflects the current park-wide scope and registered-campers-only campground condition shown by the official sources.
Conclusion updated
Summit Metro Parks
The former unclear answer was corrected after the current official FAQ directly prohibited metal detectors.
Correction
Huron-Clinton Metroparks
Clarified that the free detector permit authorizes detector operation but does not necessarily authorize recovery or removal under the separate collection rule.
Initial publication
Algonac State Park
Initial official-source summary published.
Initial publication
Flint State Park
Initial official-source summary published.
Initial publication
Grand Haven State Park
Initial official-source summary published.
Initial publication
Huron-Clinton Metroparks
Initial official-source summary published.
Initial publication
Michigan State Parks and Recreation Areas
Initial official-source summary published.
Initial publication
Porcupine Mountains Wilderness State Park
Initial official-source summary published.
Initial publication
Cleveland Metroparks
Initial official-source summary published.
Initial publication
Edgewater Beach
Initial official-source summary published.
Initial publication
Lake Metroparks
Initial official-source summary published.
Initial publication
Metroparks Toledo
Initial official-source summary published.
Initial publication
Ohio State Parks and Watercraft Lands
Initial official-source summary published.
Initial publication
Summit Metro Parks
Initial official-source summary published.