Brimstone Mtn Mine: Spodumene & Tantalite Rockhounding in Franklin County, Maine

Updated August 2026

Brimstone Mtn Mine is a mapped rockhounding spot in Franklin County, Maine. Reported finds include spodumene, tantalite. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Franklin County
State: Maine
Coordinates: 44.79225, -70.69327

Land & collecting status

Generally open to casual rockhounding

Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.

Public-land rules vary by agency, season, and field office. The RockHoundR app pulls live BLM, USFS, NPS, and tribal overlays so you can see exactly which agency manages the ground at this spot.

Sources & verification

Spot details combine the public RockHoundR location dataset, normalized mineral labels, agency land-status checks in the app, and community submissions. Coordinates are approximate until verified in the field.

State guidance last verified: April 1, 2026

Maine Geological Survey
Maine Mineral & Gem Museum
Acadia National Park rules
Community submissions reviewed against published agency rules

Found at Brimstone Mtn Mine

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

Nearby rockhounding spots

Other rockhounding spots within driving distance of Brimstone Mtn Mine.

Across the state line from Brimstone Mtn Mine

Brimstone Mtn Mine is close enough to the Maine border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Brimstone Mtn Mine FAQ

Where is Brimstone Mtn Mine?+

Brimstone Mtn Mine is in Franklin County, Maine, at 44.79225, -70.69327.

What rocks and minerals can you find at Brimstone Mtn Mine?+

Brimstone Mtn Mine is reported to produce Spodumene, Tantalite.

Is collecting allowed at Brimstone Mtn Mine?+

Generally open to casual rockhounding. Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Brimstone Mtn Mine?+

A rock hammer, a pry bar, gloves, and safety glasses suit pegmatite ground. Work weathered zones and check dump piles; coarse crystals often sit in decomposed rock.

How do I get to Brimstone Mtn Mine?+

Open the directions link to navigate to 44.79225, -70.69327 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Maine

See all 36 Maine spots →

Open Brimstone Mtn Mine on the map

Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.