Jasper Beach: Red Jasper Rockhounding in Washington County, Maine

Quick details

Access

Permission required

County

Washington County

State

Maine

Nearest road

Jasper Beach Road

Postcode

04655

Coordinates

44.62759, -67.38734

Geology at Jasper Beach

This spot sits on Eastport Formation, basalt member, mapped as basalt that formed roughly 420 to 360 million years ago. Volcanic ground like this is where agate, jasper, and other chalcedony typically form, filling old gas pockets and fracture seams in the flow rock.

Mapped unit

Eastport Formation, basalt member

Age

420–360 Ma (Devonian)

Rock types

basalt

Elevation

20 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 Jasper Beach

Best months: April to November. Typical highs run 77°F in midsummer and 29°F in midwinter, with winter lows near 10°F.

Climate normals: NOAA 1991-2020 monthlies, JONESBORO station (13 mi away), adjusted for elevation.

Land & collecting status

Permission required before collecting

Requires landowner or agency permission before any collecting. Do not enter without explicit authorization.

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.

State guidance last verified: April 1, 2026

• Maine Geological Survey
• Maine Mineral & Gem Museum
• Acadia National Park rules
• Community submissions reviewed against published agency rules

Found at Jasper Beach

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

• Red JasperEncyclopedia →