Deerfield: Agate Rockhounding in Franklin County, Massachusetts

Updated June 2026

Deerfield is a mapped rockhounding spot in Franklin County, Massachusetts. Reported finds include agate. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Franklin County
State: Massachusetts
Nearest road: Albany Road
Postcode: 01342
Coordinates: 42.54594, -72.60439

Geology at Deerfield

This spot sits on New Haven Arkose, mapped as arkose, siltstone, and sandstone that formed roughly 235 to 200 million years ago. Tough silica like agate, jasper, and chert typically weathers out of beds like these and collects as float in drainages and on deflation surfaces.

Mapped unit: New Haven Arkose
Age: 235–200 Ma (Late Triassic)
Rock types: arkose, siltstone, and sandstone
Elevation: 190 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 Deerfield

Best months: March to November. Typical highs run 82°F in midsummer and 33°F in midwinter, with winter lows near 14°F.

Climate normals: NOAA 1991-2020 monthlies, GREENFIELD #3 station (2 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 Deerfield

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

Agate Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Deerfield.

Across the state line from Deerfield

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

Deerfield FAQ

Where is Deerfield?+

Deerfield is in Franklin County, Massachusetts, at 42.54594, -72.60439. Nearest road: Albany Road.

What rocks and minerals can you find at Deerfield?+

Deerfield is reported to produce Agate.

Is collecting allowed at Deerfield?+

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 Deerfield?+

Most agate and jasper is surface float: bring a spray bottle, a pick or small shovel, and a sturdy bag. Wet stones show their banding and translucence.

When is the best time to visit Deerfield?+

The most comfortable months at Deerfield are March to November.

How do I get to Deerfield?+

Open the directions link to navigate to 42.54594, -72.60439 in Google Maps. The nearest road is Albany Road.

More rockhounding in Massachusetts

See all 45 Massachusetts spots →

Open Deerfield on the map

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