Riggins: Garnet Rockhounding in Idaho County, Idaho

Updated June 2026

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

Quick details

Access: Public area
County: Idaho County
State: Idaho
Nearest road: US 95
Postcode: 83542
Coordinates: 45.46523, -116.30791

Geology at Riggins

This spot sits on Blue Mountains island arc, biotite (+hornblende) gneiss and biotite schist, mapped as biotite-quartz-feldspar gneiss that formed roughly 300 to 145 million years ago. Metamorphic rock like this is where garnet, staurolite, and kyanite typically grow as the rock recrystallizes under heat and pressure.

Mapped unit: Blue Mountains island arc, biotite (+hornblende) gneiss and biotite schist
Age: 300–145 Ma (Permian to Jurassic)
Rock types: biotite-quartz-feldspar gneiss
Elevation: 1,680 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 Riggins

Best months: February to June. Typical highs run 91°F in midsummer and 42°F in midwinter, with winter lows near 26°F.

Climate normals: NOAA 1991-2020 monthlies, RIGGINS station (9 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

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

Found at Riggins

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

Garnet Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Riggins.

Across the state line from Riggins

Riggins 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.

Riggins FAQ

Where is Riggins?+

Riggins is in Idaho County, Idaho, at 45.46523, -116.30791. Nearest road: US 95.

What rocks and minerals can you find at Riggins?+

Riggins is reported to produce Garnet.

Is collecting allowed at Riggins?+

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 Riggins?+

A rock hammer, a sieve, and a small shovel work well for garnet-type minerals, which concentrate as resistant grains in soils and creek gravels.

When is the best time to visit Riggins?+

The most comfortable months at Riggins are February to June.

How do I get to Riggins?+

Open the directions link to navigate to 45.46523, -116.30791 in Google Maps. The nearest road is US 95.

More rockhounding in Idaho

See all 115 Idaho spots →

Open Riggins on the map

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