Garden Valley: Aquamarine Rockhounding in Boise County, Idaho

Updated June 2026

Garden Valley is a mapped rockhounding spot in Boise County, Idaho. Reported finds include aquamarine. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Boise County
State: Idaho
Nearest road: Banks Lowman Road
Postcode: 83622
Coordinates: 44.09162, -115.95399

Geology at Garden Valley

This spot sits on Terrace deposits, level-2 above modern stream, mapped as cobble gravel;pebble gravel;coarse sand;boulder gravel that formed within roughly the last 129,000 years. Loose deposits like these are float-collecting ground: erosion keeps moving durable rocks and minerals into gravel bars, cutbanks, and washes.

Mapped unit: Terrace deposits, level-2 above modern stream
Age: < 1 Ma (Late Pleistocene)
Rock types: cobble gravel;pebble gravel;coarse sand;boulder gravel
Elevation: 3,130 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 Garden Valley

Best months: March to October. Typical highs run 89°F in midsummer and 34°F in midwinter, with winter lows near 19°F.

Climate normals: NOAA 1991-2020 monthlies, GARDEN VALLEY station (1 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.

State guidance last verified: April 1, 2026

Idaho Panhandle National Forests — Emerald Creek
Idaho Geological Survey
Spencer Opal Mines (fee-dig operator)
Community submissions reviewed against published agency rules

Found at Garden Valley

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 Garden Valley.

Across the state line from Garden Valley

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

Garden Valley FAQ

Where is Garden Valley?+

Garden Valley is in Boise County, Idaho, at 44.09162, -115.95399. Nearest road: Banks Lowman Road.

What rocks and minerals can you find at Garden Valley?+

Garden Valley is reported to produce Aquamarine.

Is collecting allowed at Garden Valley?+

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 Garden Valley?+

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 Garden Valley?+

The most comfortable months at Garden Valley are March to October.

How do I get to Garden Valley?+

Open the directions link to navigate to 44.09162, -115.95399 in Google Maps. The nearest road is Banks Lowman Road.

More rockhounding in Idaho

See all 115 Idaho spots →

Open Garden Valley on the map

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