St. Croix River at Grand Falls Flowage — Rockhounding in Washington County, Maine
The Maine Geological Survey lists the St. Croix River at Baileyville among the state's recreational gold-panning streams, where the gold is very fine flour gold thought to be shed from nearby base-metal mineralization. A state-owned boat access on the Grand Falls Flowage gives free public entry to the water. Garnet and magnetite occur in the same black sand. Reported finds include gold, garnet, magnetite. Below: coordinates, access notes, nearby spots, and trip-planning links.
St. Croix River at Grand Falls Flowage photos
Public image records connected to this spot or its reported material.
Map showing St. Croix River at Grand Falls Flowage in Washington County, Maine
Quick details
- Access
- Public area
- County
- Washington County
- State
- Maine
- Coordinates
- 45.25130, -67.52300
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:
- Maine Geological Survey
- Maine Mineral & Gem Museum
- Acadia National Park rules
- Community submissions reviewed against published agency rules
Found at St. Croix River at Grand Falls Flowage
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 St. Croix River at Grand Falls Flowage.
- PerryWashington County, Maine · 27 mi awayAnalcime, Calcite, Datolite
- Gleason CoverWashington County, Maine · 30 mi awayJasper
- Lubec Lead MineWashington County, Maine · 37 mi awayAnglesite, Bornite, Calcite
- Jasper BeachWashington County, Maine · 44 mi awayRed Jasper
- Tunk MountainTop pick in MaineHancock County, Maine · 51 mi awaySmoky Quartz, Feldspar, Hornblende
- Catherine Mountain (Donnell Pond)Top pick in MaineHancock County, Maine · 52 mi awayMolybdenite, Scheelite, Fluorapatite
- Warren Nickel ProspectKnox County, Maine · 113 mi awayPyrrhotite, Chalcopyrite
St. Croix River at Grand Falls Flowage FAQ
Why is St. Croix River at Grand Falls Flowage one of the best rockhounding spots in Maine?+
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More rockhounding in Maine
See all 31 Maine spots →Open St. Croix River at Grand Falls Flowage on the map
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