Unnamed Location (Actinolite prisms): Actinolite Prisms Rockhounding in Mendocino County, California

Updated June 2026

Unnamed Location (Actinolite prisms) is a mapped rockhounding spot in Mendocino County, California. Reported finds include actinolite prisms. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Mendocino County
State: California
Nearest road: Redwood Highway
Postcode: 95449
Coordinates: 38.95262, -123.09731

Geology at Unnamed Location (Actinolite prisms)

This spot sits on Ultramafic rocks, chiefly Mesozoic, unit 3 (Coast Ranges and Western Klamath Mountains), mapped as serpentinite that formed roughly 175 to 145 million years ago. Metamorphic rock like this weathers into resistant float, and minerals that survive transport typically concentrate in nearby drainages.

Mapped unit: Ultramafic rocks, chiefly Mesozoic, unit 3 (Coast Ranges and Western Klamath Mountains)
Age: 175–145 Ma (Middle Jurassic to Late Jurassic)
Rock types: serpentinite
Elevation: 520 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 Unnamed Location (Actinolite prisms)

Best months: September to June. Typical highs run 94°F in midsummer and 59°F in midwinter, with winter lows near 38°F.

Climate normals: NOAA 1991-2020 monthlies, CLOVERDALE station (12 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 California — Recreational mineral collecting
California Geological Survey
CDFW — Suction Dredge Mining Permit Program
Community submissions reviewed against published agency rules

Found at Unnamed Location (Actinolite prisms)

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

Actinolite Prisms Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Unnamed Location (Actinolite prisms).

Unnamed Location (Actinolite prisms) FAQ

Where is Unnamed Location (Actinolite prisms)?+

Unnamed Location (Actinolite prisms) is in Mendocino County, California, at 38.95262, -123.09731. Nearest road: Redwood Highway.

What rocks and minerals can you find at Unnamed Location (Actinolite prisms)?+

Unnamed Location (Actinolite prisms) is reported to produce Actinolite Prisms.

Is collecting allowed at Unnamed Location (Actinolite prisms)?+

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 Unnamed Location (Actinolite prisms)?+

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 Unnamed Location (Actinolite prisms)?+

The most comfortable months at Unnamed Location (Actinolite prisms) are September to June.

How do I get to Unnamed Location (Actinolite prisms)?+

Open the directions link to navigate to 38.95262, -123.09731 in Google Maps. The nearest road is Redwood Highway.

More rockhounding in California

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Open Unnamed Location (Actinolite prisms) on the map

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