Pillsbury Ridge: Aquamarine & Beryl Rockhounding in Sullivan County, New Hampshire

Plan your visit

Generally open to casual rockhounding

County

Sullivan County

State

New Hampshire

Nearest road

Old Grafton Road

Postcode

03284

Coordinates

43.53502, -71.99439

Coordinates are approximate. Confirm the exact ground in the RockHoundR app, where land overlays show which agency manages the area.

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.

Best time to visit Pillsbury Ridge

Comfortable months (45 to 90°F highs)

Best months: April to October. Typical highs run 77°F in midsummer and 26°F in midwinter, with winter lows near 5°F.

Climate normals: NOAA 1991-2020 monthlies, GRAFTON station (3 mi away), adjusted for elevation.

Geology at Pillsbury Ridge

This spot sits on Concord Granite, mapped as granite that formed roughly 385 to 360 million years ago. Granitic ground like this typically carries quartz veins and pockets, and weathered crystals tend to collect in the soils and drainages below.

Mapped unit

Concord Granite

Age

385–360 Ma (Late Devonian)

Rock types

granite

Elevation

1,570 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.

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.

• White Mountain National Forest
• New Hampshire Geological Survey
• New Hampshire State Parks rules
• Community submissions reviewed against published agency rules