Is Treasure Hunting Legal? Laws by Land Type and State

Private land. Legal with the owner's permission; get it in writing. Who keeps what you find depends on your agreement with the owner and on state law. Without an agreement, most states give found property embedded in the soil to the landowner. Searching without permission is trespass, and removing property can be theft.

National Parks and National Monuments run by the Park Service. Illegal. Park Service regulations prohibit possessing or using a metal detector in a park area (36 CFR 2.1(a)(7)) and prohibit disturbing or removing any natural or cultural resource (36 CFR 2.1(a)(1)).

National Forests (US Forest Service). Recreational metal detecting is generally allowed in areas with no known historic or archaeological sites, but a forest can close any area, and removing archaeological resources is prohibited (36 CFR 261.9). Recreational gold panning is generally allowed on land open to mineral entry, unless it falls on an active mining claim. Check with the ranger district first.

BLM public land. Casual metal detecting and rockhounding are generally allowed. ARPA still applies, as does the Federal Land Policy and Management Act. Active mining claims are private mineral rights: on a claim, the gold belongs to the claimant. Check claims in BLM's MLRS records and contact the field office.

The Archaeological Resources Protection Act (ARPA). ARPA (16 U.S.C. 470aa–mm) makes it a crime to excavate, remove, damage or sell archaeological resources over 100 years old from federal or tribal land without a permit. If the resource's value plus the cost of restoration exceeds $500, a first offense is a felony punishable by up to two years in prison. The 1906 Antiquities Act is a separate law that lets presidents create national monuments and protects antiquities on federal land.

State land, state parks and state trust land. Rules differ by state and by agency, and many state parks prohibit detecting or allow it only on beaches with a permit. Arizona State Trust land is a common mistake: the recreational permit covers hiking and camping, and its terms exclude metal detecting and removing anything. Check the state page for your state below, then confirm with the agency named there.

Tribal land. Illegal without written permission from the tribe. ARPA and tribal law both apply.

Beaches, rivers and shipwrecks. Many public beaches allow detecting, subject to local ordinances. Under the Abandoned Shipwreck Act of 1987, states own most abandoned historic shipwrecks embedded in their submerged lands, so wreck sites need a state permit. Salvage claims in federal waters go through federal court.

Treasure trove and "finders keepers". A few states follow the old common-law treasure-trove rule, giving hidden gold, silver or currency to the finder. Most US courts instead treat property found embedded in the ground as belonging to the landowner, and lost property must often be reported. Get a written agreement before you search.

Is treasure hunting illegal in the US? No. It is legal on private land with the owner's permission and on much BLM and National Forest land. It is illegal in National Parks, on tribal land without permission, and wherever you would remove archaeological resources over 100 years old from federal or tribal land (ARPA).

Do I need a permit to metal detect? Not for casual detecting on most BLM land or open National Forest land. Many state parks require a permit or prohibit detecting, and you always need the owner's permission on private land.

Can I keep treasure I find? On private land, by agreement with the owner and state law; without an agreement, buried finds usually go to the landowner. On federal land you may not keep archaeological resources over 100 years old. Modern coins and recent items found on open land are generally yours.

Is metal detecting allowed in National Forests? Generally yes, outside known historic and archaeological sites and areas the forest has closed. Removing archaeological resources is prohibited, so stop and report historic finds.

What is the penalty for digging artifacts on federal land? Under ARPA, if the resource's value plus the cost of restoration exceeds $500, a first offense is a felony with up to two years in prison, plus fines and forfeiture of equipment and vehicles.

This is general information, not legal advice. Laws change; confirm with the managing agency or an attorney.