S Fork Crooked River: Agatized Limb Casts Rockhounding in Crook County, Oregon

Updated June 2026

S Fork Crooked River is a mapped rockhounding spot in Crook County, Oregon. Reported finds include agatized limb casts. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Crook County
State: Oregon
Coordinates: 44.08440, -120.04470

Geology at S Fork Crooked River

This spot sits on Columbia River Basalt Group; Picture Gorge Basalt, mapped as basalt flows that formed roughly 23 to 5 million years ago. Volcanic ground like this weathers into rocky slopes and float, and fresh exposures in cuts and drainages are usually the most productive places to look.

Mapped unit: Columbia River Basalt Group; Picture Gorge Basalt
Age: 23–5 Ma (Miocene)
Rock types: basalt flows
Elevation: 3,710 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 S Fork Crooked River

Best months: February to November. Typical highs run 88°F in midsummer and 41°F in midwinter, with winter lows near 21°F.

Climate normals: NOAA 1991-2020 monthlies, PAULINA station (4 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

BLM Oregon/Washington — Rockhounding & mineral material
Oregon Department of Geology and Mineral Industries (DOGAMI)
Oregon Parks and Recreation Department — beach collecting rules
Community submissions reviewed against published agency rules

Found at S Fork Crooked River

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

Agatized Limb Casts

Nearby rockhounding spots

Other rockhounding spots within driving distance of S Fork Crooked River.

S Fork Crooked River FAQ

Where is S Fork Crooked River?+

S Fork Crooked River is in Crook County, Oregon, at 44.08440, -120.04470.

What rocks and minerals can you find at S Fork Crooked River?+

S Fork Crooked River is reported to produce Agatized Limb Casts.

Is collecting allowed at S Fork Crooked River?+

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 S Fork Crooked River?+

A rock hammer, sturdy gloves, safety glasses, and a collecting bag cover the basics here. Add a spray bottle: wet rock shows color and pattern that dry rock hides.

When is the best time to visit S Fork Crooked River?+

The most comfortable months at S Fork Crooked River are February to November.

How do I get to S Fork Crooked River?+

Open the directions link to navigate to 44.08440, -120.04470 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Oregon

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Open S Fork Crooked River on the map

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