The single most common beginner question is simple: can I legally dig here? Public land in the western U.S. is open to mineral prospecting only if it has not already been claimed by someone else and has not been withdrawn from mineral entry. Here is how claims work and how to check before you go.
What a mining claim actually is
A mining claim is a right to the minerals on a piece of federal land, established under the General Mining Law of 1872. It gives the claimant the exclusive right to the valuable minerals on that ground — it does not transfer surface ownership. Prospecting or digging on someone's active claim is claim-jumping, and it can carry real legal consequences.
Placer vs lode claims
There are two main types. A placer claim covers loose, alluvial deposits — the creek and gravel gold most hobbyists chase — and is limited to about 20 acres per individual (association placers can be larger). A lode claim covers gold still locked in a vein or in-place rock and is typically up to 1,500 feet by 600 feet.
Spotting a claim in the field
Active claims are marked by physical monuments — wooden posts, rock cairns, or capped PVC pipe — at the corners and at a location monument. Often there is a location notice tucked in a can or tube listing the claimant's name, the claim name and the date. If you find these markers, the ground is claimed; move on or contact the claimant for permission.
How a claim is recorded
After staking on the ground, a claimant records a location notice with the county recorder and files it with the BLM, where it receives a serial number. Claimants must pay an annual maintenance fee (currently around $165 per claim, with a small-miner waiver option) — if they stop, the claim becomes void and the ground reopens.
How to check claim status
The BLM's Mineral and Land Records System (MLRS, which replaced the older LR2000) lets you search active claims. Map tools like AdAurum surface that claim data directly on the map and let you search claim history, so you can check a spot in seconds instead of digging through government databases.
Land that is closed to prospecting
Not all public land is open. Wilderness areas, national parks and most national monuments, many recreation areas, military land, and specifically withdrawn lands are closed to mineral entry. Tribal and private lands require permission. In short: 'it is BLM land' does not automatically mean 'I can dig here.'
A quick checklist before you dig
Run through these every time:
- Is it federal land that is open to mineral entry (not withdrawn)?
- Is the ground already covered by an active claim?
- Are there local or seasonal rules (dredging bans, hand-tools-only)?
- When in doubt, call the local BLM or Forest Service office.