Mt. Pleasant: Amethyst Rockhounding in Westmoreland County, Pennsylvania

Updated June 2026

Mt. Pleasant is a mapped rockhounding spot in Westmoreland County, Pennsylvania. Reported finds include amethyst. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Westmoreland County
State: Pennsylvania
Nearest road: Old 119
Postcode: 15688
Coordinates: 40.15938, -79.55710

Geology at Mt. Pleasant

This spot sits on Monongahela Group, mapped as limestone, shale, and sandstone that formed roughly 325 to 300 million years ago. Carbonate rock like this dissolves and weathers readily, so fresh road cuts, quarries, and creek exposures are typically the most productive ground.

Mapped unit: Monongahela Group
Age: 325–300 Ma (Pennsylvanian)
Rock types: limestone, shale, and sandstone
Elevation: 1,150 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 Mt. Pleasant

Best months: March to November. Typical highs run 82°F in midsummer and 37°F in midwinter, with winter lows near 20°F.

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

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 Mt. Pleasant

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

Amethyst Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Mt. Pleasant.

Across the state line from Mt. Pleasant

Mt. Pleasant is close enough to the Pennsylvania border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Mt. Pleasant FAQ

Where is Mt. Pleasant?+

Mt. Pleasant is in Westmoreland County, Pennsylvania, at 40.15938, -79.55710. Nearest road: Old 119.

What rocks and minerals can you find at Mt. Pleasant?+

Mt. Pleasant is reported to produce Amethyst.

Is collecting allowed at Mt. Pleasant?+

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 Mt. Pleasant?+

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 Mt. Pleasant?+

The most comfortable months at Mt. Pleasant are March to November.

How do I get to Mt. Pleasant?+

Open the directions link to navigate to 40.15938, -79.55710 in Google Maps. The nearest road is Old 119.

More rockhounding in Pennsylvania

See all 88 Pennsylvania spots →

Open Mt. Pleasant on the map

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