Crehore Mine: Garnet & Hornblende Rockhounding in Essex County, New York

Updated June 2026

Crehore Mine is a mapped rockhounding spot in Essex County, New York. Reported finds include garnet, hornblende. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Essex County
State: New York
Nearest road: Blue Ledges Trail
Coordinates: 43.83333, -74.13333

Geology at Crehore Mine

This spot sits on Calcitic and dolomitic marble, mapped as marble that formed roughly 1600 to 1000 million years ago. Metamorphic rock like this is where garnet, staurolite, and kyanite typically grow as the rock recrystallizes under heat and pressure.

Mapped unit: Calcitic and dolomitic marble
Age: 1600–1000 Ma (Mesoproterozoic)
Rock types: marble
Elevation: 1,630 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 Crehore Mine

Best months: April to October. Typical highs run 75°F in midsummer and 26°F in midwinter, with winter lows near 6°F.

Climate normals: NOAA 1991-2020 monthlies, INDIAN LAKE 2SW station (9 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 Crehore Mine

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 Crehore Mine.

Across the state line from Crehore Mine

Crehore Mine 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.

Crehore Mine FAQ

Where is Crehore Mine?+

Crehore Mine is in Essex County, New York, at 43.83333, -74.13333. Nearest road: Blue Ledges Trail.

What rocks and minerals can you find at Crehore Mine?+

Crehore Mine is reported to produce Garnet, Hornblende.

Is collecting allowed at Crehore Mine?+

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 Crehore Mine?+

A rock hammer, a sieve, and a small shovel work well for garnet-type minerals, which concentrate as resistant grains in soils and creek gravels.

When is the best time to visit Crehore Mine?+

The most comfortable months at Crehore Mine are April to October.

How do I get to Crehore Mine?+

Open the directions link to navigate to 43.83333, -74.13333 in Google Maps. The nearest road is Blue Ledges Trail.

More rockhounding in New York

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Open Crehore Mine on the map

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