Metal Detecting in Idaho: Boise Charges a Fee Other States Give Away Free (2026)

Quick Answer: Idaho allows metal detecting in state parks with park-manager sign-off (Idaho Admin. Code 26.26.01.20 § 175.15) and on BLM public land under standard federal rules — but the City of Boise is the first place in this series to charge a $13.50 permit fee instead of giving written permission away free. A new state law, effective July 1, 2026, also turned disturbing a Native American grave or cairn into a felony carrying up to $50,000 and five years, the harshest penalty documented anywhere in this series so far.

Verified October 2, 2026: Idaho Admin. Code 26.26.01.20 § 175.15 confirmed via the Federation of Metal Detector & Archeological Clubs’ Idaho regulation page. The $13.50 Boise permit fee confirmed directly against the City of Boise Parks and Recreation Department’s own metal-detecting-permit page. House Bill 856’s felony reclassification of Idaho Code § 27-502, its March 31, 2026 signing date, and its July 1, 2026 effective date confirmed via the Idaho Legislature’s own bill text and session-law record. BLM’s hand-tool gold-prospecting and 100-year artifact rules confirmed against the Bureau’s own “Collecting on Public Lands” guidance document. Land of the Yankee Fork State Park’s acreage and preserved ghost towns confirmed via the park’s own historical record.

Idaho is the 38th entry in this state-by-state series — Michigan, Ohio, North Carolina, Texas, Florida, Arizona, Colorado, Georgia, New York, Virginia, South Carolina, Tennessee, Kentucky, Oklahoma, Missouri, Indiana, Wisconsin, Alabama, Illinois, Washington, Oregon, Utah, Minnesota, New Jersey, Maine, Massachusetts, Maryland, New Hampshire, Vermont, Connecticut, Arkansas, Iowa, West Virginia, Pennsylvania, California, Hawaii, and Nevada came before it. Most of those states hand detectorists a free written authorization, if they grant permission at all. Idaho is the first to put an actual price tag on it — and the first in 2026 to turn its grave-protection law from a misdemeanor into a felony mid-year.

State parks: discretionary permission, no statewide process

Idaho Administrative Code 26.26.01.20 § 175.15 lists metal detecting among a set of “non-traditional recreational activities” that a park or program manager “may authorize” if the activity doesn’t interfere with traditional park uses and stays consistent with preserving park resources. That’s the entire statewide rule — there’s no single published form, no standing list of parks where it’s routinely granted, and no default answer. Each of Idaho’s more than two dozen state parks decides for itself, the same park-by-park discretion this series has already documented in West Virginia and Pennsylvania. Finding a permission is not the same as digging up a find, either — permission to run a detector doesn’t extend to removing historical, cultural, or natural resources, which stay off-limits regardless of who signed off on the detector itself.

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Boise’s $13.50 permit: the first priced rule in this series

Every city or state permit rule this series has documented so far has been a free written authorization — a form, a sign-off, a letter from a park supervisor. Boise breaks that pattern outright. The City of Boise Parks and Recreation Department’s own permit page lists a metal detecting permit fee of $13.50, purchasable online or by calling the department directly, covering detecting in city parks and facilities. It’s a small fee by any measure, and nobody is pricing hobbyists out of the activity over thirteen and a half dollars. But it’s a genuine structural difference worth flagging: Idaho’s capital treats metal detecting as a priced park service, like a reservable picnic shelter or a dog-park pass, not a discretionary courtesy a ranger extends for free. Other Idaho cities and the state park system itself haven’t adopted the same fee-based model — it’s specific to Boise’s own parks department rules.

BLM land: open ground, hand tools, 100-year cutoff

Outside state and city parks, Idaho’s public BLM land follows the standard federal framework this series has confirmed in every state with significant BLM acreage. BLM’s own “Collecting on Public Lands” guidance confirms recreational detecting and hand-tool gold prospecting — pans, sluices, metal detectors — are allowed on most BLM ground, provided detectorists skip motorized or mechanized equipment, restore any ground they disturb, and leave anything older than 100 years alone under the Archaeological Resources Protection Act baseline. Regulations vary by BLM district, so checking with the local field office before a trip into unfamiliar ground is standard practice, not a formality specific to Idaho.

Land of the Yankee Fork: the ghost town the state preserves instead of opens

Idaho’s own gold-rush history runs through the Yankee Fork mining district in Custer County, where the Land of the Yankee Fork State Park — 521 acres anchored by an interpretive center near Challis — preserves the ghost towns of Bayhorse, Bonanza, and Custer along with one of the best-preserved gold dredges still standing in the country. It’s precisely the kind of site a detectorist chasing Idaho’s mining past would want to swing a coil across. It’s also, by the park’s own purpose, a protected historic resource rather than open recreational ground — the same gap this series found in Nevada’s Berlin-Ichthyosaur State Park and California’s Marshall Gold Discovery State Historic Park, where the actual birthplace of a state’s gold-rush identity turns out to be the one place detecting it is off the table.

Native American graves: misdemeanor to felony, overnight

Idaho Code § 27-502 has barred willfully removing, mutilating, defacing, injuring, or destroying any cairn or grave since long before this series started tracking state-by-state penalties. What changed is the punishment. House Bill 856, signed into law March 31, 2026 and effective July 1, 2026, rewrote the statute to add expanded prohibited acts — including possessing, selling, or publicly displaying remains or grave artifacts — and reclassified a violation as a felony punishable under Idaho Code § 18-112, which carries up to five years in prison and a $50,000 fine. That’s a sharper jump than anywhere else in this series: Hawaii’s $20,000 burial-site fine and California’s $10,000 archaeological-disturbance ceiling were the prior series-highs, and both are misdemeanor-tier penalties. Idaho moved straight to felony exposure, and did it three months before this guide was published — making Idaho’s burial-protection law the newest and the harshest this series has documented in the same state.

Getting started

Request permission from the specific state park’s manager before bringing a detector in, and budget the $13.50 fee if you’re detecting inside Boise’s city parks specifically — it’s not required statewide, only within Boise’s own system. Treat Land of the Yankee Fork’s ghost towns, dredge, and any other marked historic site as protected ground regardless of how open the surrounding BLM land looks, and stop immediately if a target turns out to be bone or grave-associated given how far July 2026’s law raised the stakes. Our beginner’s buying guide and gold detector guide are good next stops before your first trip to either a Boise park or Idaho’s BLM backcountry.

The bottom line

Idaho’s state-park rule is standard discretionary permission, but Boise is the first city in this series to attach an actual price to it, and Idaho as a whole just became the first state to turn grave disturbance into a felony mid-year rather than at a legislative session’s start. Land of the Yankee Fork State Park shows the same historic-site gap this series keeps finding — the ground that made the state’s mining history is preserved, not open. See the complete field in our overall pillar rankings or the metal detecting legality guide for how other states compare.

Sources: Idaho State Regulation — FMDAC, City of Boise — Metal Detecting Permit, Idaho H0856 (2026) — Grave Protection Amendments, Idaho Statutes — Section 27-502, BLM — Collecting on Public Lands, Land of the Yankee Fork State Park — Wikipedia.