Baldpate Mountain: Aquamarine Rockhounding in Oxford County, Maine

Updated June 2026

Baldpate Mountain is a mapped rockhounding spot in Oxford County, Maine. Reported finds include aquamarine. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Oxford County
State: Maine
Nearest road: Appalachian Trail
Postcode: 04261
Coordinates: 44.60921, -70.89215

Geology at Baldpate Mountain

This spot sits on granite (muscovite accessory mineral), tonalite, mapped as granite and tonalite that formed roughly 420 to 360 million years ago. Granitic rock like this is where pegmatite pockets tend to occur, the coarse-crystal settings that typically carry beryl, tourmaline, mica, and feldspar.

Mapped unit: granite (muscovite accessory mineral), tonalite
Age: 420–360 Ma (Devonian)
Rock types: granite and tonalite
Elevation: 3,800 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 Baldpate Mountain

Best months: May to September. Typical highs run 67°F in midsummer and 14°F in midwinter, with winter lows near -7°F.

Climate normals: NOAA 1991-2020 monthlies, ANDOVER 2 station (6 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.

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 Baldpate Mountain

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

Aquamarine Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Baldpate Mountain.

Across the state line from Baldpate Mountain

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

Baldpate Mountain FAQ

Where is Baldpate Mountain?+

Baldpate Mountain is in Oxford County, Maine, at 44.60921, -70.89215. Nearest road: Appalachian Trail.

What rocks and minerals can you find at Baldpate Mountain?+

Baldpate Mountain is reported to produce Aquamarine.

Is collecting allowed at Baldpate Mountain?+

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 Baldpate Mountain?+

A rock hammer, a pry bar, gloves, and safety glasses suit pegmatite ground. Work weathered zones and check dump piles; coarse crystals often sit in decomposed rock.

When is the best time to visit Baldpate Mountain?+

The most comfortable months at Baldpate Mountain are May to September.

How do I get to Baldpate Mountain?+

Open the directions link to navigate to 44.60921, -70.89215 in Google Maps. The nearest road is Appalachian Trail.

More rockhounding in Maine

See all 31 Maine spots →

Open Baldpate Mountain on the map

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