Cascade: Agate & Petrified Wood Rockhounding in Valley County, Idaho

Updated June 2026

Cascade is a mapped rockhounding spot in Valley County, Idaho. Reported finds include agate, petrified wood. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Valley County
State: Idaho
Nearest road: One Eleven Way
Postcode: 83611
Coordinates: 44.47138, -115.99280

Geology at Cascade

This spot sits on Mainstream and sidestream alluvium, mapped as coarse sand;sand;pebble gravel;cobble gravel;boulder gravel;silt;clay that formed within roughly the last 12,000 years. Petrified wood typically travels as tough float, and worked gravels like these are exactly where weathered pieces tend to collect.

Mapped unit: Mainstream and sidestream alluvium
Age: < 1 Ma (Holocene)
Rock types: coarse sand;sand;pebble gravel;cobble gravel;boulder gravel;silt;clay
Elevation: 4,730 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 Cascade

Best months: March to October. Typical highs run 83°F in midsummer and 32°F in midwinter, with winter lows near 15°F.

Climate normals: NOAA 1991-2020 monthlies, CASCADE 1 NW station (4 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 Cascade

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

Nearby rockhounding spots

Other rockhounding spots within driving distance of Cascade.

Across the state line from Cascade

Cascade 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.

Cascade FAQ

Where is Cascade?+

Cascade is in Valley County, Idaho, at 44.47138, -115.99280. Nearest road: One Eleven Way.

What rocks and minerals can you find at Cascade?+

Cascade is reported to produce Agate, Petrified Wood.

Is collecting allowed at Cascade?+

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 Cascade?+

A rock hammer, sturdy gloves, and a padded bag cover petrified wood hunting. Most pieces are surface float, so walking slopes and washes beats digging.

When is the best time to visit Cascade?+

The most comfortable months at Cascade are March to October.

How do I get to Cascade?+

Open the directions link to navigate to 44.47138, -115.99280 in Google Maps. The nearest road is One Eleven Way.

More rockhounding in Idaho

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Open Cascade on the map

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