Purdue & Canyon Creeks: Red Garnet Rockhounding in Latah County, Idaho

Updated June 2026

Purdue & Canyon Creeks is a mapped rockhounding spot in Latah County, Idaho. Reported finds include red garnet. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Latah County
State: Idaho
Coordinates: 46.89910, -116.35543

Geology at Purdue & Canyon Creeks

This spot sits on Idaho batholith, undifferentiated, mapped as granitic rocks that formed roughly 145 to 66 million years ago. Garnet and similar hard minerals typically weather out of rock like this and concentrate as resistant grains in nearby soils and creek gravels.

Mapped unit: Idaho batholith, undifferentiated
Age: 145–66 Ma (Cretaceous)
Rock types: granitic rocks
Elevation: 3,030 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 Purdue & Canyon Creeks

Best months: March to October. Typical highs run 81°F in midsummer and 33°F in midwinter, with winter lows near 21°F.

Climate normals: NOAA 1991-2020 monthlies, ELK RVR station (12 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 Purdue & Canyon Creeks

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

Red Garnet Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Purdue & Canyon Creeks.

Across the state line from Purdue & Canyon Creeks

Purdue & Canyon Creeks 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.

Purdue & Canyon Creeks FAQ

Where is Purdue & Canyon Creeks?+

Purdue & Canyon Creeks is in Latah County, Idaho, at 46.89910, -116.35543.

What rocks and minerals can you find at Purdue & Canyon Creeks?+

Purdue & Canyon Creeks is reported to produce Red Garnet.

Is collecting allowed at Purdue & Canyon Creeks?+

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 Purdue & Canyon Creeks?+

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 Purdue & Canyon Creeks?+

The most comfortable months at Purdue & Canyon Creeks are March to October.

How do I get to Purdue & Canyon Creeks?+

Open the directions link to navigate to 46.89910, -116.35543 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Idaho

See all 115 Idaho spots →

Open Purdue & Canyon Creeks on the map

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