Detector Maps
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Is the ground open?
Mining claims are placer and lode rights staked on federal land and recorded by the BLM. Detector Maps maps every claim, colour-codes it by type and status, and links each one back to the official record — so you can tell open ground from someone else's at a glance.
Four ways prospectors put it to work
Check the claim before you go
Tap any claim to read its type, claimant and the official BLM record link before you commit a tank of gas.
Spot the open ground
With active claims colour-coded, the unclaimed gaps read at a glance — focus on ground that's actually open to locate.
Placer vs lode at a glance
Placer and lode claims are styled apart, so you read what kind of ground you're looking at before you load the truck.
Stay legal on public land
Claims sit beside BLM units, ownership and access — confirm it's open public ground before you swing. A guide, not legal advice.
Live claims, and where they cluster
Live mining claims
Active placer & lode, colour-coded by status.
Placer claim catchment heatmap
Where placer claims concentrate by catchment.
Historical lode claim heatmap
Decades of lode claims as density.
Historical placer claim heatmap
Where placer ground has been worked before.
Claims questions, straight answers.
A placer or lode claim is a mineral right located on federal land and recorded with the BLM. It gives the holder rights to the minerals — not the surface, and not the public’s right to be there.
Claims refresh from the federal record as the BLM publishes updates. Always confirm a claim’s current status against the official record before you act on it.
An active claim is someone else’s mineral right. Detect on open, unclaimed public land, or get the claimant’s permission — we link the official record so you can check.
The gold-bearing states across the US — the same layer set in every state.
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Prospect smarter, not harder. .
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