Before you dig
How to check a mining claim on MLRS
BLM on the ownership layer means the United States manages the surface. It does not mean the minerals are unclaimed. An active lode or placer claim can sit on that same section. Casual collecting of common float is a different problem from prying crystals out of someone else’s location.
What you are looking up
The Bureau of Land Management’s Mineral & Land Records System — mlrs.blm.gov — holds mining-claim case files, serial numbers, and a research map. Public research does not require you to file a claim. Reports also live at reports.blm.gov.
Old forum posts still say LR2000. The serial numbers moved. Search MLRS, not a bookmark from 2018.
Field sequence
- Get the township, range, and section from the ownership map or a downloaded offline layer. A town name is not enough. Topaz Mountain, Dugway, and the House Range each cover more than one section.
- Open MLRS and use the research map. Search by legal land description (meridian, township, range, section) or drop the map on the ground you plan to stand on.
- Filter to mining claims. Read disposition. Active, filed, or held is the flag. Closed, abandoned, or void is history, not a free pass — confirm the date.
- Open the serial register. Note claim type (lode, placer, mill site, tunnel site), claimant name, and location date. A mill site is not a collecting invitation.
- If an active claim covers the spot, do not work the discovery. Common practice is to ask the claimant or move to unclaimed BLM. This site does not interpret claim law for you.
What a claim does and does not do
- It is not a fence and not a gate code. You can often still drive a public route.
- It is a mineral location under the Mining Law. The valuable mineral the claim was staked for is not your casual-use rock.
- Surface disturbance, holes, and equipment are a separate problem from picking up a chip of float. Hand tools on open BLM still have a weight cap.
- A claim does not turn SITLA into BLM, and it does not open a park.
West-desert habits that cause the fight
Named beds attract both weekend buckets and paper claims. Topaz Mountain and Dugway are famous enough that “everyone collects there” is not a title search. Run the section you are actually parked in. Checkerboard ground can put a claim on the BLM section and a trust permit problem on the next one.
More on the line between hobby rock and someone else’s location: mining claims vs casual collecting.
Informational only — not legal advice and not a claim search you can rely on in a dispute. Confirm status in MLRS the week you go, and with the BLM field office if the register is unclear.