California metal detecting rule layers
Quick answer: a rule applies because of jurisdiction and managing authority, not simply because a place is publicly accessible. This page contains only rule layers actually inherited by current California records.
How to read these rules: detector use, digging, target recovery, artifact protection, permits and designated zones can be controlled by different provisions. A restrictive recovery rule is not automatically rewritten as a detector-possession ban, and an access permit is not automatically treated as recovery authorization.
California metal detecting law questions
Is metal detecting legal on all public land in California?
No. Public access does not create metal-detecting or target-recovery permission. The controlling rule depends on the land manager, property purpose, detector-use rule, digging/recovery restrictions, protected-resource law and any permit or designated-zone requirement.
Does a recreation, hunting or access permit authorize metal detecting?
Not unless the controlling rule expressly says it does. Access credentials and detector/recovery authorization are treated as separate legal questions in this database.
Can a map pin prove where metal detecting is permitted?
No. A map pin is only a public visitor/access reference point. It is never treated as a property boundary, detecting zone, archaeological location or legal permission boundary.
How many controlling rule layers are listed for California?
13 current rule layers are represented on this page. Each rule entry identifies its managing authority, status, official source, verification grade and verification date.
California
California State Parks protects archaeological, historical and natural resources and individual park orders can impose stricter detector restrictions. Ordinary visitor access is not treated as detector-recovery permission.
Important exceptions: Historic/archaeological objects may not be removed; natural-resource collection is limited; exact park orders and closures control.
Official source — www.parks.ca.gov · Supporting official source — govt.westlaw.com · Verified
California
The current Folsom Lake State Recreation Area posted order prohibits possession or use of metal detectors in the unit except limited transport and permit circumstances.
Important exceptions: Written authorization and posted-order exceptions control; protected resources remain off limits.
Official source — www.parks.ca.gov · Supporting official source — www.parks.ca.gov · Verified
California
Marshall Gold Discovery State Historic Park has an explicit order prohibiting possession or use of metal detectors, subject only to stated exceptions.
Important exceptions: Historic-park resource protections are especially strict; do not disturb or recover artifacts.
Official source — www.parks.ca.gov · Supporting official source — www.parks.ca.gov · Verified
California
CDFW public-use rules prohibit visitors from cutting, removing, digging into or otherwise disturbing soil, sand, gravel, rock or mineral resources except as specifically authorized.
Important exceptions: Hunting/fishing access and a Lands Pass do not authorize detector excavation or mineral collection.
Official source — wildlife.ca.gov · Supporting official source — wildlife.ca.gov · Verified
California
California marine protected areas apply site-specific take and resource-protection rules; detector recovery that would remove protected geological or cultural material is not inferred from beach access.
Important exceptions: Exact MPA classification, tide-zone ownership and local rules must be checked before any recovery activity.
Official source — wildlife.ca.gov · Supporting official source — wildlife.ca.gov · Verified
California
Metal detectors may be used as prospecting tools on suitable BLM public lands, but historic artifacts and archaeological resources are protected and special designations can be more restrictive.
Important exceptions: Developed sites, mining claims, wilderness/WSA/NCL designations, closures and cultural resources require exact confirmation.
Official source — www.blm.gov · Supporting official source — www.blm.gov · Verified
California
California BLM National Conservation Lands are special protected designations and are not treated as ordinary unrestricted detector-recovery land.
Important exceptions: Current August 2026 inventory includes 92 BLM wildernesses and 62 WSAs; cultural-resource and designation-specific rules control.
Official source — www.blm.gov · Supporting official source — www.blm.gov · Verified
California
NPS-associated trails and corridors can cross non-NPS parcels; NPS restrictions apply to NPS-administered land, while other parcels follow their controlling owner.
Important exceptions: Do not treat an entire trail corridor or multi-owner landscape as NPS-owned.
Official source — www.nps.gov · Supporting official source — www.nps.gov · Verified
California
National Wildlife Refuge public access is activity- and zone-specific. Hunting, fishing or wildlife observation access is not detector-recovery permission.
Important exceptions: Closed areas, wildlife buffers, archaeological resources and refuge-specific special-use rules control.
Official source — www.fws.gov · Supporting official source — www.fws.gov · Verified
California
Detector use on suitable National Forest System lands must respect archaeological/historic-resource protections, special-area restrictions, mining claims and local forest orders.
Important exceptions: Any activity that becomes prospecting/mining or disturbs protected resources follows separate law and authorization.
Official source — www.fs.usda.gov · Supporting official source — www.fs.usda.gov · Verified
California
USACE recreation lands are governed by Title 36 and local project rules; detector activity is not treated as blanket permission across a project.
Important exceptions: Exact park, swim beach, lease/manager and cultural-resource restrictions control.
Official source — www.spk.usace.army.mil · Supporting official source — www.ecfr.gov · Verified
California
Reclamation projects may include federal, state, local or concession-managed recreation zones. Detector use and excavation depend on the exact managing entity and protected-resource rules.
Important exceptions: Do not infer permission from reservoir access; archaeological resources and unauthorized excavation remain protected.
Official source — www.usbr.gov · Supporting official source — www.ecfr.gov · Verified
National Park Service park areas — 36 CFR §2.1
36 CFR §2.1 prohibits possessing or using metal detectors and related detecting devices in National Park Service park areas. The same section also prohibits digging, disturbing, removing or damaging protected natural, cultural and archaeological resources. current data uses this federal rule only for public visitor/reference points inside identified Florida NPS units; no search-target coordinates are exposed.
Important exceptions: The detector prohibition does not apply when a device is broken down and packed to prevent use, to navigation/safe-operation equipment for boats or aircraft, or to detectors used for authorized scientific, mining or administrative activities. These are not ordinary recreational detecting permissions. Park-specific closures and superintendent rules may be stricter.
Official source — www.ecfr.gov · Verified