Ligonier: Fossil Hunting in Westmoreland County, Pennsylvania

Updated June 2026

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

Quick details

Access: Public area
County: Westmoreland County
State: Pennsylvania
Coordinates: 40.27441, -79.29729

Geology at Ligonier

This spot sits on Mauch Chunk Formation, mapped as shale, siltstone, and sandstone that formed roughly 360 to 325 million years ago. Sedimentary layers like these are where fossils are typically preserved, and fresh exposures after rain or in active cuts tend to produce best.

Mapped unit: Mauch Chunk Formation
Age: 360–325 Ma (Mississippian)
Rock types: shale, siltstone, and sandstone
Elevation: 1,300 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 Ligonier

Best months: March to November. Typical highs run 84°F in midsummer and 39°F in midwinter, with winter lows near 17°F.

Climate normals: NOAA 1991-2020 monthlies, RECTOR 3 SSW station (8 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 Ligonier

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 Ligonier.

Across the state line from Ligonier

Ligonier 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.

Ligonier FAQ

Where is Ligonier?+

Ligonier is in Westmoreland County, Pennsylvania, at 40.27441, -79.29729.

What rocks and minerals can you find at Ligonier?+

Ligonier is reported to produce Quartz, Fossil.

Is collecting allowed at Ligonier?+

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 Ligonier?+

A rock hammer, a cold chisel, safety glasses, and newspaper or foam for wrapping finds cover most fossil ground. A trowel and a sieve help in soft exposures.

When is the best time to visit Ligonier?+

The most comfortable months at Ligonier are March to November.

How do I get to Ligonier?+

Open the directions link to navigate to 40.27441, -79.29729 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Pennsylvania

See all 90 Pennsylvania spots →

Open Ligonier on the map

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