Quick Answer: Washington requires free annual registration under WAC 352-32-235 before detecting in any of the roughly 47 named state parks that allow it, and beach detecting is capped to the outer coast’s water’s-edge-to-mean-high-tide-line strip — Puget Sound is explicitly excluded. Washington’s archaeological resources law, RCW 27.53.060, is unusually broad: it applies on private land as well as public land, with civil penalties up to $5,000 per violation plus a separate misdemeanor charge.
Verified September 12, 2026: Confirmed the registration requirement, park count, and outer-coast beach boundary directly against Washington State Parks’ own metal detecting registration form, and cross-checked the WAC and RCW citations and penalty amounts against GetLuckyFind’s 2026 Washington law guide and the Revised Code of Washington itself.
Washington is the 20th 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. The wrinkle here is new to the series: no prior state has drawn its beach line at a specific tidal zone on one coast while flatly excluding an entire inland waterway from the same program.
State parks: free registration, not a blanket permit
Washington doesn’t require a paid permit to detect in its state parks, but it does require advance registration under WAC 352-32-235. Sign up once, keep a copy of the completed form with you while detecting, and the registration stays valid for a year. Roughly 47 named parks currently participate, and each one posts its own specific areas — detecting is confined to whatever the park designates, not the whole property. Unoccupied campsites are generally fair game; occupied ones are not.
| Land type | Detecting allowed? | What's required |
|---|---|---|
| Washington State Parks (~47 named) | With registration | Free WAC 352-32-235 registration, carry a copy, posted areas only |
| Outer coast tideline (water's edge to mean high tide) | Yes | Same state parks registration applies |
| Puget Sound shoreline | No | Explicitly excluded from the beach-detecting allowance |
| City/county parks (e.g. Spokane) | Varies | Separate local permit required, independent of the state program |
| Private property | Yes, with permission | Landowner consent — but RCW 27.53 archaeological rules still apply |
Getting to most of these parks by vehicle also means budgeting for Washington’s standard day-use Discover Pass — a separate requirement from the free detecting registration itself, but one that catches out-of-state visitors off guard when they show up with a registration form and no parking pass.
The outer coast rule: a narrower beach window than it sounds
Washington’s beach-detecting allowance only covers the strip between the ocean’s water’s edge and the mean high tide line along the outer coast — and the rule is explicit that this does not include Puget Sound. That’s a meaningfully narrower window than states where any public beach is fair game: Washington’s own inland waterway, home to most of the state’s population and its most-visited urban beaches, simply isn’t part of the state parks detecting program. Practically, that pushes serious beach detectorists toward the Pacific-facing coast — including the roughly 62-mile Seashore Conservation Area — rather than anywhere along the sound itself.
XP Deus II (WS6 Master)
- At 750 grams fully wireless, it's light enough for a day spent moving between several of Washington's ~47 registered parks without wearing out an arm on posted-area-only ground.
- The coil-only waterproof rating and 49-frequency FMF engine handle both dry state-park terrain and the wet sand of the outer-coast tideline window without swapping machines.
- Read our full XP Deus II review and the beach detector roundup for how it compares to fully submersible options.
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Archaeological resources: a law that reaches private land too
Most states in this series only regulate archaeological digging on public land, leaving private property to the landowner’s discretion. Washington’s RCW 27.53.060 goes further: it’s unlawful to knowingly remove, alter, excavate, or damage an archaeological resource on private land as well as public land without a permit from the state. Penalties stack — a civil penalty of up to $5,000 per violation, plus a separate misdemeanor charge, and each day a violation continues counts as a distinct offense. Separately, removing natural items from a state park at all is its own misdemeanor under RCW 79A.05.165(a), regardless of whether archaeology is involved.
Federal land: the same baseline as every state in this series
Federal ground in Washington follows the same floor that applies nationwide: the Antiquities Act of 1906 and the Archaeological Resources Protection Act (ARPA) make it illegal to remove a man-made object more than 100 years old from federal public land without a research permit. National forests generally allow recreational detecting outside archaeological sites, while national parks and monuments ban detectors outright under 36 CFR 2.1(a)(7) — see our metal detecting legality guide for the full federal breakdown.
Getting started
Register with Washington State Parks before your first trip out — it’s free, takes a year to expire, and you’ll want the confirmation copy in hand at the park. Pick one of the ~47 participating parks, confirm its posted detecting area, and budget for a Discover Pass separately if you’re driving in. If beach hunting is the draw, plan for the outer coast rather than anywhere on Puget Sound, and treat any find that looks old as something to report, not pocket — that’s true on private land too under RCW 27.53. Check our beginner buying guide before your first outing.
The bottom line
Washington runs a low-friction registration system rather than a paid permit, but the state draws two lines that don’t show up elsewhere in this series: a beach-detecting allowance that stops at Puget Sound’s edge, and an archaeological resources law that follows the artifact onto private land instead of stopping at the property line. Know your park’s posted area, know which coastline counts, and the rest of the state opens up cleanly. See the complete field in our overall pillar rankings or the metal detecting legality guide for how other states compare.
Sources: Washington State Parks — Metal Detecting Registration Form, Washington State Parks — Metal Detecting, GetLuckyFind — Metal Detecting Laws in Washington (2026), Washington State Legislature — RCW 27.53.060.