A mining claim is a parcel of federal land on which a person or company has asserted the right to possess, develop and extract a valuable mineral deposit they have discovered. That is the Bureau of Land Management’s own definition, and every word in it matters. The claim covers minerals, not the land itself. It depends on a discovery. And it only exists on land that is open to mineral entry under the Mining Law of 1872.

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People search for this topic for very different reasons. Some want to stake a gold claim for weekend prospecting. Others are looking at a gold placer claim advertised online and want to know what they would actually be buying (our ten checks before you pay for gold claims are written for them). Investors want to understand the paperwork behind a junior explorer’s land package. The fundamentals are the same for all three, and simpler than most online guides make them sound.

“A lode claim can run up to 1,500 feet along the vein and 600 feet across it.”

What a mining claim gives you, and what it doesn’t

The Mining Law of 1872 (30 U.S.C. §§ 22-54 and §§ 611-615) lets US citizens, people who have declared an intention to become citizens, and corporations organised under state law explore for and develop certain minerals on federal land. There is no cap on how many claims one qualified person can hold, as long as each claim meets the law’s requirements.

The BLM describes the right as a possessory interest. You hold the right to develop and extract the mineral deposit, and that right is protected against challenges from the United States and other claimants once a valuable deposit has been discovered. Courts have treated a valid unpatented claim as real property: it can be sold, mortgaged, inherited and taxed.

What a mining claim does not give you

• No title to the land. An unpatented mining claim leaves the land in federal ownership. The BLM (or the Forest Service on national forest land) still manages the surface.
• No exclusive surface rights. Since the Surface Resources Act of 1955, the public may generally cross claims, and the government can use the surface for other purposes that don’t materially interfere with mining.
• No right to build freely. Permanent or mobile structures and stored equipment need prior approval from the federal land manager.
• No right to common materials. Common varieties of sand, gravel, stone, pumice and cinders were removed from the Mining Law in 1955. They are sold under separate contracts, not claimed.
• No guarantee of minerals. A recorded claim proves paperwork was filed, not that a deposit exists.

Locatable, leasable and salable minerals

Federal law splits minerals into three groups, and only one of them can be claimed. Locatable minerals (most metals such as gold, silver and copper, plus certain industrial minerals and gemstones) are the ones you acquire with a mining claim. Leasable minerals such as oil and gas, coal, potash and phosphate are only available under federal leases. Salable minerals, the common sand and gravel, are sold. If someone offers a “claim” on oil, coal or ordinary gravel, something is wrong.

The four types of mining claim: lode, placer, mill site and tunnel site

The law recognises two kinds of mining claim, lode and placer, plus two kinds of supporting site. Choosing the right type is not a formality. A lode claim located on a placer deposit is invalid, and a placer claim on a lode deposit is generally invalid too, so the geology decides the paperwork.

Placer vs lode: how to tell which claim fits the ground

The simplest way to think about it: a lode claim is for minerals still locked in solid rock, and a placer claim is for minerals that have already been freed from the rock and concentrated in loose material. Gold is the classic example of both. Gold in a quartz vein on a hillside calls for a lode mining claim. The same gold, weathered out and washed into creek gravels below, calls for a placer mine claim.

Lode claims in more detail

Lode claims are usually laid out as parallelograms with the side lines parallel to the vein. They are described by a metes-and-bounds survey that measures the length and compass bearing of each boundary line from a central monument. The end lines matter more than beginners expect. If they are parallel, the claim can carry extralateral rights: the right to follow a vein at depth beyond the claim’s vertical side boundaries.

The BLM notes that lode claims are not only for narrow veins. Large-volume, low-grade disseminated deposits, such as Carlin-type gold and copper-bearing granites, are also located as lode claims. That is why big modern open-pit projects in Nevada often sit on thousands of lode claims.

Gold placer claims and other placer deposits

Placer claims were originally only for sand and gravel carrying free gold or other heavy minerals. Over time, Congress and the courts extended them to many bedded or layered non-metallic deposits, including gypsum and high-calcium limestone. Where the land is surveyed, placer claims are located by legal subdivision, such as a quarter-quarter section, rather than by metes and bounds.

Size depends on who locates the claim. One person can locate 20 acres. Two people in association can locate 40 acres, three can locate 60, and so on up to the legal maximum of 160 acres for eight or more people. A corporation is limited to 20 acres per placer claim unless it locates alongside other individuals or corporations as genuine co-locators.

What counts as a “discovery”?

Federal statute doesn’t define a valuable mineral deposit, so the government uses the prudent man rule, first set out by the Interior Department in Castle v. Womble (1894) and approved by the Supreme Court in Chrisman v. Miller (1905). A discovery exists where the evidence would justify a person of ordinary prudence in spending further labour and money with a reasonable prospect of developing a valuable mine.

The Supreme Court added a marketability test in United States v. Coleman (1968): the claimant must show a reasonable prospect of mining, removing and selling the mineral at a profit. For traditional placer claims, each 10 acres must also be shown to be mineral in character. In practice, discovery is rarely examined until the government contests a claim or, historically, when someone applied for a patent. But it is the foundation that every other right rests on.

Where you can locate a mining claim, and where you can’t

According to the BLM’s “Mining Claims and Sites on Federal Lands”, mining claims and sites can be located in 19 states: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Florida, Idaho, Mississippi, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oregon, South Dakota, Utah, Washington and Wyoming. Only “public domain” minerals qualify, meaning minerals that have never left federal ownership.

The BLM manages the surface of public lands in these states, and the US Forest Service manages the surface of National Forest System land. The BLM keeps the mineral records for both, which is why forest service mining claims are still recorded with the BLM state office.

Lands closed to mineral entry

• National parks and national monuments
• American Indian reservations
• Military reservations and scientific testing areas
• Most wildlife refuges and most Bureau of Reclamation projects
• Designated wilderness and wild portions of wild and scenic rivers, plus rivers withdrawn for study
• Other withdrawals under FLPMA Section 204 and similar orders

A claim located on land after it was withdrawn is void from the beginning. A claim located before a withdrawal can survive as a valid existing right, but only if a valuable deposit was discovered before the withdrawal date. The BLM is clear that it is the locator’s job, not the government’s, to confirm that land is open before staking.

Want to know whether that open ground is worth staking? You can draw the boundary on mining.farmonaut.com: Map Your Mining Site and get a satellite read on it before you spend money on monuments and filing fees, or send the coordinates through our mining query form.

How a mining claim is created and kept alive

The BLM describes five elements of the Mining Law: discovery, location, recordation, annual maintenance and (historically) patent. Discovery is covered above. Here is how the next three work in practice. Staking rules vary by state, so treat this as the federal skeleton and check your state’s requirements before you set a post.

Location: staking the claim on the ground

Federal law only says boundaries must be distinctly and clearly marked so they can be traced on the ground. States add the detail: size and material of corner posts, discovery monuments, and where the location notice goes. Most states require substantial monuments. The BLM no longer allows open or uncapped pipes as markers because they trap and kill wildlife. The discovery point must be tied to a permanent object such as a survey monument, benchmark, bridge or road junction.

Recordation: county and BLM within 90 days

Under FLPMA Section 314, as the BLM’s recording page explains, a new claim must be recorded with the county (or Alaska borough) under state law and with the proper BLM state office within 90 days of location. Some states set shorter county deadlines, such as 30 or 60 days. The location notice must include the date of location, each locator’s name and address, the claim name and type, the acreage, and a description of the ground. The BLM filing also needs a map of the claim boundaries.

Miss the 90-day window and federal law treats the mining claim as abandoned and void. New claims can be filed online through MLRS, as can most other claim documents that don’t need an original signature.

Maintenance: fees or assessment work every year

The BLM’s fee schedule for new claims filed on or after 1 September 2024 lists a $25 processing fee, a $49 location fee and a $200 initial maintenance fee per lode claim, mill site or tunnel site. Placer claims pay $200 for each 20 acres or part of 20 acres. After that, the $200 maintenance fee is due on or before 1 September every year. These are the amounts on the BLM fee page as checked in September 2026. The BLM adjusts them periodically, so check that page for the current schedule before you pay.

Claimants who hold 10 or fewer claims nationwide can ask for a small miner waiver instead. They must then do at least $100 of assessment work per claim each year and file an affidavit of assessment work by 30 December, with a per-claim filing fee. Fail to pay or file on time and the claim is forfeited by operation of law. There is no grace period to rely on.

Buying a mining claim: old claims, “available” claims and due diligence

Because unpatented claims are real property, they are bought and sold like other property, usually by quitclaim deed recorded with the county. No BLM consent is needed to convey a claim. The buyer must, however, file the transfer with the BLM (there is a per-claim fee), or the BLM will keep treating the old owner as the party responsible for maintenance and will send notices to them instead.

That freedom to trade is also the risk. Nobody checks a listing before it goes online. When you look at buying a mining claim, or buying old mining claims that a family has held for decades, you are relying entirely on your own checks. State law adds its own layer; our Arizona and New Mexico gold claim buyer checks show what that looks like in practice.

Remember that the fees travel with the claim. Whatever you pay a seller, you also take on $200 per lode claim every year you hold it. Over a decade that is more than $2,000 per claim at the rate listed on the BLM fee page in September 2026, before a single sample is taken.

Seven checks before buying a mining claim

1. Get the BLM serial number for every claim and look it up in MLRS. Confirm the status is active, not closed.
2. Confirm the most recent assessment year’s maintenance fee (or waiver and assessment filings) was paid by the 1 September deadline.
3. Pull the county records, not just the BLM file. The BLM case file isn’t a full chain of title; liens, royalties and earlier transfers live in the county recorder’s books.
4. Check the land was open on the date the claim was located, and that no later withdrawal or earlier claim overlaps it.
5. Match the claim type to the geology: placer for loose deposits, lode for rock-in-place.
6. Walk the boundaries or have them checked. Missing monuments and mis-plotted claims are common on older ground.
7. Test the geology before you pay for it. A claim’s price should reflect evidence, not a story.

“Miss the 90-day recording window, and federal law treats a new claim as abandoned and void.”

Closed, expired and “unclaimed” mining claims

Searches for expired mining claims, closed mining claims and open gold claims come from the same hope: that good ground has lapsed and can be picked up cheaply. Sometimes that’s true. When a claim is forfeited or abandoned, the old claimant’s rights end, and the ground may be open again if no withdrawal applies. But a closed claim is not something anyone can sell you. The only way to acquire lapsed ground is to locate a new claim yourself, correctly, with a genuine discovery.

It is also worth asking why the ground lapsed. A claim that was held for years and then dropped may have been tested and found wanting. Satellite and historical data can tell you a lot about which of these stories applies before you commit.

Gold claims outside the US: Canada’s map-staking systems

The word “claim” means something different once you cross the border. Canadian provinces own most of their mineral rights, and most have moved from ground staking to online map staking, where you select cells on a government map and pay online. There is no discovery requirement to acquire a claim, but there are work or assessment obligations to keep it.

• 📊 Gold claims in Newfoundland: claims are staked online through the province’s MIRIAD system, according to the provincial mines FAQ. One claim is 500 m × 500 m, or 25 hectares. The FAQ lists the cost at $60 per claim, of which $10 is a recording fee and $50 a refundable security deposit (checked September 2026; confirm on the FAQ before staking). Anyone aged 19 or over, or a corporation, can stake after registering.
• 📊 Gold claims in Nova Scotia: exploration licences are acquired and managed through NovaROC, the province’s online mineral registry, where you can see available ground, apply and pay fees.
• 📊 Quebec: claims are obtained by map designation through the GESTIM system run by the provincial natural resources ministry.
• 📊 Saskatchewan: the Mineral Administration Registry Saskatchewan (MARS) issues claims, permits and leases online from a GIS-based tenure map.

Outside North America, most countries grant exploration licences through a national mining cadastre rather than claims. Our mining cadastre portal guide by country covers how those systems work in 17 countries. Two cases sit between the two models: British Columbia, covered in our British Columbia gold claims buyer guide, and Western Australia, where our guide to buying a gold lease in Western Australia covers title, rent and transfer.

Using satellite data to judge a mining claim before you commit

The legal side of a mining claim is well documented. The geological side usually isn’t. Most claims, especially small ones advertised for sale, come with a few photos, a pan of concentrates and maybe an old assay certificate. That is rarely enough to judge whether the ground deserves $200 a claim every year, let alone a purchase price.

This is where our satellite-based mineral detection fits. We analyse multispectral and hyperspectral imagery over the claim boundary. Each mineral and alteration zone reflects light with its own spectral signature, and our algorithms use that to flag likely mineralised zones, alteration halos, and structures such as faults and fractures. For a lode claim, that points to where veins and alteration line up. For a placer claim, it helps show where the source rocks and drainage fit together.

• ✔ Input: the claim coordinates, KML/KMZ or polygon, plus the target mineral.
• ✔ Turnaround: 5–20 business days depending on area and mineral complexity.
• 📊 Deliverables: prospectivity heatmaps, ranked high-potential zones with estimated location and depth ranges, geological interpretation, and PDF plus georeferenced GIS files. Premium+ adds TargetMax™ drilling intelligence and 3D subsurface models.
• 📊 Cost and speed: satellite screening can lower early-exploration costs by up to 80–85% and cut timelines from months to days, compared with starting on the ground.
• ⚠ Limitation: the result is a set of exploration targets, not a resource estimate. Sampling and drilling confirm them.

The satellite-driven 3D mineral prospectivity mapping overview shows what a typical deliverable looks like. We have scanned 100,000+ hectares for 20+ mineral types across 25+ countries.

Mining claim information: where to look

• BLM MLRS (mlrs.blm.gov): claim status, serial numbers, maps, online filing and fee payment.
• BLM General Land Office records: patents and historical survey plats.
• County recorder: location notices, deeds, liens and affidavits of assessment work.
• State geological surveys and the USGS: geological maps, mineral occurrence data and historical reports.
• Forest Service ranger districts: operating plans for claims on national forest land.

Frequently asked questions

Reviewed September 2026 against the BLM’s mining claims, recording, fee and patent pages, its “Mining Claims and Sites on Federal Lands” publication, and the mineral-tenure pages of Newfoundland and Labrador, Nova Scotia, Quebec and Saskatchewan.

Legal and fee information in this guide comes from the Bureau of Land Management’s mining claim pages, fee schedule and its “Mining Claims and Sites on Federal Lands” publication, a mining-transaction due-diligence paper by the law firm Parsons Behle & Latimer, and the mineral-tenure pages of the governments of Newfoundland and Labrador, Nova Scotia, Quebec and Saskatchewan. Fees, forms and state rules change; confirm current requirements with the BLM state office, the county recorder and the relevant state or provincial agency before you stake, buy or pay. Satellite results are exploration targets, not mineral resources or reserves. Nothing here is legal or investment advice.