Flintville: Feldspar & Garnet Rockhounding in Harford County, Maryland

Updated July 2026

Flintville is a mapped rockhounding spot in Harford County, Maryland. Reported finds include feldspar, garnet, mica, quartz. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Permission required
County: Harford County
State: Maryland
Nearest road: Flintville Road
Postcode: 21160
Coordinates: 39.70486, -76.24853

Geology at Flintville

This spot sits on Wissahickon Formation; Metagraywacke, mapped as metagraywacke and muscovite schist that formed roughly 2500 to 540 million years ago. Metamorphic terrain like this typically carries quartz veins and sweats, and weathered crystals tend to end up in the soils and streams below.

Mapped unit: Wissahickon Formation; Metagraywacke
Age: 2500–540 Ma (Proterozoic)
Rock types: metagraywacke and muscovite schist
Elevation: 360 ft

Geologic mapping via Macrostrat and the underlying state geological survey maps (CC BY 4.0). Bedrock at the surface can vary within a mapped unit.

Best time to visit Flintville

Best months: March to November. Typical highs run 86°F in midsummer and 39°F in midwinter, with winter lows near 24°F.

Climate normals: NOAA 1991-2020 monthlies, CONOWINGO DAM station (5 mi away), adjusted for elevation.

Land & collecting status

Permission required before collecting

Requires landowner or agency permission before any collecting. Do not enter without explicit authorization.

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 Flintville

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 Flintville.

Across the state line from Flintville

Flintville 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.

Flintville FAQ

Where is Flintville?+

Flintville is in Harford County, Maryland, at 39.70486, -76.24853. Nearest road: Flintville Road.

What rocks and minerals can you find at Flintville?+

Flintville is reported to produce Feldspar, Garnet, Mica, Quartz.

Is collecting allowed at Flintville?+

Permission required before collecting. Requires landowner or agency permission before any collecting. Do not enter without explicit authorization. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Flintville?+

A rock hammer, a small pry bar, gloves, and safety glasses cover most crystal ground. A screen helps in loose pocket soil, and newspaper protects points on the way out.

When is the best time to visit Flintville?+

The most comfortable months at Flintville are March to November.

How do I get to Flintville?+

Open the directions link to navigate to 39.70486, -76.24853 in Google Maps. The nearest road is Flintville Road.

More rockhounding in Maryland

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Open Flintville on the map

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