Prince George’s County: Petrified Wood Rockhounding in Prince George's County, Maryland

Updated June 2026

Prince George’s County is a mapped rockhounding spot in Prince George's County, Maryland. Reported finds include petrified wood. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Prince George's County
State: Maryland
Nearest road: Martin Road
Postcode: 20613
Coordinates: 38.69132, -76.79721

Geology at Prince George’s County

This spot sits on Chesapeake Group; Calvert Formation, mapped as sand and clay that formed roughly 23 to 5 million years ago. Petrified wood typically travels as tough float, and worked gravels like these are exactly where weathered pieces tend to collect.

Mapped unit: Chesapeake Group; Calvert Formation
Age: 23–5 Ma (Miocene)
Rock types: sand and clay
Elevation: 170 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 Prince George’s County

Best months: February to December. Typical highs run 88°F in midsummer and 44°F in midwinter, with winter lows near 25°F.

Climate normals: NOAA 1991-2020 monthlies, UPPER MARLBORO 3 NNW station (11 mi away).

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 Prince George’s County

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

Petrified Wood Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Prince George’s County.

Across the state line from Prince George’s County

Prince George’s County 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.

Prince George’s County FAQ

Where is Prince George’s County?+

Prince George’s County is in Prince George's County, Maryland, at 38.69132, -76.79721. Nearest road: Martin Road.

What rocks and minerals can you find at Prince George’s County?+

Prince George’s County is reported to produce Petrified Wood.

Is collecting allowed at Prince George’s County?+

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 Prince George’s County?+

A rock hammer, sturdy gloves, and a padded bag cover petrified wood hunting. Most pieces are surface float, so walking slopes and washes beats digging.

When is the best time to visit Prince George’s County?+

The most comfortable months at Prince George’s County are February to December.

How do I get to Prince George’s County?+

Open the directions link to navigate to 38.69132, -76.79721 in Google Maps. The nearest road is Martin Road.

More rockhounding in Maryland

See all 43 Maryland spots →

Open Prince George’s County on the map

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