How do I find out who owns or manages the ground I want to collect on?
Updated
On this page6
Work from the general to the exact: find the spot on a land status map that colors federal, state and private ground, confirm the parcel in the county's records, check the official federal land records for withdrawals, private minerals and mining claims, and then call the managing office to confirm closures. Write down what you found, where and when. Doing it at home before the trip is the only reliable way to know which rule on where you are allowed to collect applies. The steps below are in the order that saves the most time, with what each source can and cannot tell you.
The sources and what each one answers
| Source | What it answers | What it cannot tell you |
|---|---|---|
| Land status (surface management) map from the BLM | Which agency or owner manages the surface, by color | Who owns the minerals; closures; claims; small inholdings at map scale |
| County parcel viewer or assessor map | The owner of record of private and state parcels, and parcel numbers | Mineral ownership if severed; federal rules |
| State land agency map | State trust land and other state parcels | Whether collecting is allowed (that is the agency's rule) |
| BLM Master Title Plat (MTP) | Official land status for a township: open to mining or not, withdrawals, title transfers, mineral reservations | Topography or landmarks [1] |
| BLM MLRS | Active and closed mining claims by township, range and section | Claims not yet recorded; on-the-ground boundaries [1][2] |
| BLM field office or Forest Service ranger district | Closures, monuments, wilderness, local rules, whether rockhounding is allowed | Nothing, if you ask the right questions |
| Mapping apps | Convenient field view of land status layers | Accuracy and currency; always check against the official sources |
Step by step
1. Pin the exact spot
Get coordinates for where you plan to collect, not just the name of the area. Note the nearest road and any landmark. If you found the site in a club bulletin or an old guidebook, expect the description to be vague and the land status to have changed since it was written.
2. Read a land status map
The BLM publishes maps and national datasets, linked from its rockhounding page, among them land status data that shows which agency or owner manages each piece of ground [3]. Find your point and read the map's legend; the color tells you whose rules to look up next. Watch for small squares and strips of another color. In much of the West, state trust sections and private inholdings sit inside larger blocks of federal land, and they are easy to miss at a small scale.
3. Get the legal description
Note the meridian, township, range and section from the map grid. You need them for the federal records searches below. For example, T10S R6E Sec. 14 in the Montana Principal Meridian is the BLM packet's sample location [1].
4. Check the county parcel records
If the point is private or state land, or anywhere near a boundary, open the county assessor's parcel viewer. It gives the parcel number and owner of record. For private land, that is who you ask for permission; see collecting on private land. County recorders also hold mining claim certificates of location [1].
5. Check the state land agency
State trust land is managed by a state land office or department, and its rules differ sharply from federal rules. In Arizona, for example, the BLM state office's brochure says, "Arizona State Trust Land is not public land," and "Rockhounding and metal detecting are not allowed on Arizona State Trust Land" [4]. If a state parcel is involved, look up that state's rule on collecting on state land in all fifty states.
6. Read the Master Title Plat
For federal land, the Master Title Plat is the official record of land status. The BLM says MTPs are available from its General Land Office Records website and show whether land is open to mining, along with title transfers, withdrawals and leases [1]. Learn two abbreviations: "NOM" means not open to mining claims, and "ALL MIN" means all minerals are reserved to the United States [1]. Always read the right-hand margin, where the notes are [1].
7. Look for a severed mineral estate
The surface and the minerals under it can belong to different owners. The BLM lists land where the mineral estate is privately owned among the places where public rock collecting on its land is generally not allowed [3][5], and that condition does not show on a recreation map. The Master Title Plat and county deed records are where a mineral reservation appears. If you see one, or are unsure, ask the field office.
8. Search for mining claims
Run the Mining Claims Geographic Report in the BLM's Mineral and Land Records System (MLRS) for your township, range and section, with case disposition set to Active [1][2]. The steps, and how to read claim markers on the ground, are on mining claims: how to check and what they mean for you.
9. Call the managing office
Maps and records do not show temporary closures, fire restrictions, monument objects, wilderness rules or local collecting rules. The BLM tells collectors to contact their "local BLM office" about restrictions [5]; the Forest Service says to "check with local ranger district office for information" [6]. Ask whether collecting is allowed at your exact spot, and whether anything has changed recently.
10. Write it down
Record what you checked and what you learned:
- the date of the check,
- the map or dataset and its date,
- the legal description,
- the land manager and any parcel owner,
- the MLRS search result,
- the name of the person you spoke with at the office, and what they said.
Keep the record with your field notes. It supports the locality on your labels and shows, if anyone asks later, that you collected where you were allowed to.
Mapping apps: useful, with limits
Phone apps that overlay land status on a map are a real help in the field, especially near boundaries. They draw on public land records, but each app updates on its own schedule, so a layer can lag behind a land exchange, a new withdrawal or a closure. Use an app to see where you are, and the official sources and the managing office to decide whether you may collect there. If the app and the official map disagree, follow the official map and ask the office.
In the field, when you are unsure
Boundary signs, fences and gates help, but their absence proves nothing. If you are standing somewhere and cannot tell whose land it is, do not collect. Take a GPS point and a photo, and check it when you get home. The ground will still be there next trip.
Matching the land to its rule
Once you know the manager, the next question is that manager's rule. The overview table, with every kind of ground and its citation, is on where you are allowed to collect.
References
- Bureau of Land Management, Montana-Dakotas State Office, *Mining Claim Packet*, September 2024. https://blm.gov/sites/default/files/docs/2024-09/MTDK%20Mining%20Claims%20Packet%202024.09.pdf
- Bureau of Land Management, Greg Fuhs, *Ten Things to Know About the MLRS Mining Claims Module*, June 9, 2021. https://blm.gov/blog/2021-06-09/ten-things-know-about-blms-mineral-land-records-system
- Bureau of Land Management, *Rockhounding on Public Lands*, read October 22, 2026. https://blm.gov/programs/recreation/rockhounding
- Bureau of Land Management, Arizona, *Rockhounding in Arizona*, BLM/AZ/GI-14/009 (no printed date; web file dated 2018). https://BLM.GOV/sites/default/files/documents/files/2014%20Rockhounding_14_web_2018.pdf
- Bureau of Land Management, *Public Collection of Rocks, Mineral Specimens, and Semiprecious Gemstones on Public Lands for Noncommercial Purposes: FAQ*, file dated February 28, 2024. https://muleapi.blm.gov/sites/default/files/docs/2024-02/BLM-Rock-Collection-FAQs_2-28-24.pdf
- USDA Forest Service, *Rockhounding Guide*, FS-1091, June 2017. https://www.fs.usda.gov/media/229394
