SW of Freer: Agate & Silicified Wood Rockhounding in Duval County, Texas

Updated June 2026

SW of Freer is a mapped rockhounding spot in Duval County, Texas. Reported finds include agate, silicified wood. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Duval County
State: Texas
Coordinates: 27.77263, -98.76535

Geology at SW of Freer

This spot sits on ground mapped as Catahoula and Frio and Vicksburg Formations, undivided that formed roughly 34 to 5 million years ago. Petrified wood typically shows up as durable float on slopes and in washes cut into ground like this.

Mapped unit: Catahoula and Frio and Vicksburg Formations, undivided
Age: 34–5 Ma (Oligocene to Miocene)
Elevation: 480 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 SW of Freer

Best months: October to April. Typical highs run 98°F in midsummer and 66°F in midwinter, with winter lows near 44°F. Summer heat here is intense, so carry more water than you think you need and work the early morning.

Climate normals: NOAA 1991-2020 monthlies, FREER station (11 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

Texas Parks and Wildlife Department
Bureau of Economic Geology — Texas geology
Big Bend National Park — Rules
Community submissions reviewed against published agency rules

Found at SW of Freer

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 SW of Freer.

SW of Freer FAQ

Where is SW of Freer?+

SW of Freer is in Duval County, Texas, at 27.77263, -98.76535.

What rocks and minerals can you find at SW of Freer?+

SW of Freer is reported to produce Agate, Silicified Wood.

Is collecting allowed at SW of Freer?+

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 SW of Freer?+

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 SW of Freer?+

The most comfortable months at SW of Freer are October to April. Summer heat here is intense, so carry more water than you think you need and work the early morning.

How do I get to SW of Freer?+

Open the directions link to navigate to 27.77263, -98.76535 in Google Maps. Some spots are remote, so check road conditions before driving out.

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Open SW of Freer on the map

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