Wisconsin effectively limits state-park detecting to recovering a specific lost item, with a written permit and a seasonal window — general treasure hunting isn’t the model here. And its field-archaeology law reaches surprisingly far, including lake bottoms. Here’s the detail.
At a glance
| State parks | Restricted Detecting on DNR lands is allowed only to locate a specific lost personal item, under a special permit (form 9400-239) signed by the property manager, in a defined area between May 1 and Oct 15. |
|---|---|
| State & public land | Restricted Wis. Stat. §44.47 reserves the state’s exclusive right of field archaeology; removing archaeological objects on state or municipal land (including lake bottoms) without a State Archaeologist permit is illegal. |
| Public land & lakes | Depends Landlocked; Great Lakes and inland lake/stream bottomlands to the ordinary high-water mark are state-owned and subject to DNR permit rules plus §44.47. |
| Local & federal | Depends County and municipal parks vary (Dane County has a policy). |
*Even where detecting is allowed, archaeological/historic sites are protected and you must fill holes and follow posted rules. Always confirm the current rule with the specific land manager.
Metal detecting in Wisconsin state parks
The Wisconsin DNR allows detectors on DNR lands only to locate specific lost personal items, under a special permit (form 9400-239) signed by the property manager, limited to a defined area and a specific time between May 1 and October 15. Recovered items are reported to the property office, which keeps anything that isn’t the permittee’s own lost property. The rules are grounded in NR 45 (NR 45.04).
Wisconsin’s antiquities law
Wisconsin Statute §44.47 (Field archaeology) reserves to the state the exclusive right of field archaeology and makes it illegal to remove archaeological objects or conduct field archaeology on state or municipal land — including the bottomlands of natural lakes and streams to the ordinary high-water mark, and shipwrecks — without a State Archaeologist permit. Archaeological materials 50 or more years old can’t be removed.
Public land, lakes & local rules
Wisconsin has no ocean coast; the Great Lakes and inland lake and stream bottomlands to the ordinary high-water mark are state-owned and subject to DNR permit rules plus §44.47 field-archaeology protections. County and municipal parks vary — Dane County Parks, for example, has its own policy. See our national guide.
Sources
Official and statutory sources this page is based on (last verified July 2026):
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Frequently Asked Questions
- Can you go metal detecting in a Wisconsin state park?
- Only with a written DNR permit (form 9400-239) signed by the property manager, only to recover a specific lost personal item, in a defined area between May 1 and October 15. General recreational treasure hunting isn’t provided for.
- Can you keep what you find in Wisconsin?
- Generally no beyond your own lost item — you present recovered items to the property office, which keeps anything that isn’t the permitted item, and archaeological materials 50 or more years old cannot be removed.
- What about Wisconsin lake beaches and shorelines?
- Bottomlands of natural lakes and streams to the ordinary high-water mark are state-owned and subject to DNR permit rules plus §44.47 field-archaeology protections, so they aren’t freely open to detecting.
Find more, remember where
Download LuckyFind — free for iPhone and Android — to track your routes, log your finds, and keep your permitted spots organized.
