Peeksill: Sunstone Rockhounding in Westchester County, New York

Updated June 2026

Peeksill is a mapped rockhounding spot in Westchester County, New York. Reported finds include sunstone. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Westchester County
State: New York
Nearest road: Jerome Drive
Postcode: 10567
Coordinates: 41.30469, -73.87525

Geology at Peeksill

This spot sits on Biotite granite gneiss, mapped as biotite gneiss that formed roughly 1600 to 1000 million years ago. Metamorphic rock like this weathers into resistant float, and minerals that survive transport typically concentrate in nearby drainages.

Mapped unit: Biotite granite gneiss
Age: 1600–1000 Ma (Mesoproterozoic)
Rock types: biotite gneiss
Elevation: 310 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 Peeksill

Best months: March to November. Typical highs run 84°F in midsummer and 37°F in midwinter, with winter lows near 18°F.

Climate normals: NOAA 1991-2020 monthlies, SHRUB OAK station (3 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 Peeksill

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

Sunstone

Nearby rockhounding spots

Other rockhounding spots within driving distance of Peeksill.

Across the state line from Peeksill

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

Peeksill FAQ

Where is Peeksill?+

Peeksill is in Westchester County, New York, at 41.30469, -73.87525. Nearest road: Jerome Drive.

What rocks and minerals can you find at Peeksill?+

Peeksill is reported to produce Sunstone.

Is collecting allowed at Peeksill?+

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 Peeksill?+

A rock hammer, sturdy gloves, safety glasses, and a collecting bag cover the basics here. Add a spray bottle: wet rock shows color and pattern that dry rock hides.

When is the best time to visit Peeksill?+

The most comfortable months at Peeksill are March to November.

How do I get to Peeksill?+

Open the directions link to navigate to 41.30469, -73.87525 in Google Maps. The nearest road is Jerome Drive.

More rockhounding in New York

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Open Peeksill on the map

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