Union Bridge — Rockhounding in Carroll County, Maryland
Union Bridge is a mapped rockhounding spot in Carroll County, Maryland. Reported finds include pink marble, green marble. Below: coordinates, access notes, nearby spots, and trip-planning links.
Map showing Union Bridge in Carroll County, Maryland
Quick details
- Access
- Public area
- County
- Carroll County
- State
- Maryland
- Nearest road
- Quaker Hill Road
- Postcode
- 21791
- Coordinates
- 39.55408, -77.17261
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.
Sources: RockHoundR public spot dataset, app land overlays, and local agency review before each trip.
Found at Union Bridge
Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.
- Pink MarbleEncyclopedia →
- Green MarbleEncyclopedia →
Nearby rockhounding spots
Other rockhounding spots within driving distance of Union Bridge.
- New WindsorCarroll County, Maryland · 4 mi awayAzurite, Bornite, Calamine
- MiddlesburgeCarroll County, Maryland · 5 mi awayChrysocolla
- Dollyhyde CreekFrederick County, Maryland · 6 mi awayBornite, Pink Calcite, Covellite
- FrederickFrederick County, Maryland · 16 mi awayPink Fluorite
- Catoctin MountainFrederick County, Maryland · 17 mi awayCopper
- MarriottsvilleHoward County, Maryland · 20 mi awayQuartz
- GraniteBaltimore County, Maryland · 22 mi awayQuartz, Garnet, Tourmaline
- MiddletownFrederick County, Maryland · 22 mi awayStibnite
Across the state line from Union Bridge
Union Bridge is close enough to the Maryland border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.
- Valley QuarryAdams County, Pennsylvania · 17 mi awayCopper, Epidote, Chrysocolla
- GettysburgAdams County, Pennsylvania · 17 mi awayCopper, Chabazite, Epidote
- Adams CountyAdams County, Pennsylvania · 20 mi awayAzurite, Cuprite, Malachite
- Fox HillFranklin County, Pennsylvania · 27 mi awayGarnet
- Area Around Caledonia State ParkFranklin County, Pennsylvania · 30 mi awayAgate, Jasper
- Piney MountainAdams County, Pennsylvania · 31 mi awayPiedmontite
Union Bridge FAQ
Where is Union Bridge?+
What rocks and minerals can you find at Union Bridge?+
Is collecting allowed at Union Bridge?+
How do I get to Union Bridge?+
More rockhounding in Maryland
See all 38 Maryland spots →Open Union Bridge on the map
Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.
