Rockhounding near San Antonio, TX

32 mapped rockhounding spots within 150 miles of San Antonio — most are inside a 2 to 3 hour drive. Below: a map, the closest spots, what they produce, and full coordinates with access notes.

Covering parts of Texas.

Closest rockhounding spots to San Antonio

The 6 nearest mapped spots, with straight-line distance and an approximate drive time.

New BraunfelsComal County, Texas31 mi · 39 min drivePetrified Wood
Erdman FarmKarnes County, Texas41 mi · 51 min drivePetrified Palm Wood, Opalized Wood, Fossils
Tessman FarmKarnes County, Texas41 mi · 51 min driveAgatized Palm Wood
Road cut on E side of US 87Gillespie County, Texas56 mi · 1 hr 10 min driveFossils
Amethyst Hill on Althaus RanchBlanco County, Texas61 mi · 1 hr 16 min driveAmethyst, Citrine
Stream gravels around FredericksburgGillespie County, Texas62 mi · 1 hr 18 min driveAlmandine Garnet

Most-reported finds near San Antonio

Counts reflect how many spots in this radius mention each material.

Every spot within 150 miles of San Antonio

Sorted by distance from San Antonio. Tap a row to open the spot detail page with full directions, access status, and nearby trips.

Spot	County	Minerals	Coordinates	Access
New BraunfelsGruene Place Drive	Comal County	Petrified Wood	29.7286, -98.1088	Public
Erdman FarmFM 887	Karnes County	Petrified Palm Wood Opalized Wood Fossils	29.0005, -98.0196	Public
Tessman FarmFM 1344	Karnes County	Agatized Palm Wood	28.9173, -98.1372	Public
Road cut on E side of US 87South US Highway 87	Gillespie County	Fossils	30.1611, -98.8934	Public
Amethyst Hill on Althaus Ranch	Blanco County	Amethyst Citrine	30.3067, -98.4455	Public
Stream gravels around FredericksburgNorth Olive Street	Gillespie County	Almandine Garnet	30.2714, -98.8546	Public
H.D. House Ranch areaTX 72	Live Oak County	Agatized Fern Buds Jasper Chalcedony	28.4665, -98.2258	Public
Peach CreekCounty Road 353	Gonzales County	Agate Petrified Wood	29.5041, -97.3143	Public
Moss Ranch area near Enchanted Rock	Llano County	Epidote Pink Feldspar Quartz Smoky Quartz	30.5020, -98.8021	Public
General Area	Llano County	Barite Serpentine Soapstone	30.5248, -98.7469	Public
E of Austin	Travis County	Agatized Wood Petrified Palm Wood	30.2358, -97.5460	Public
MoultonCounty Road 532G	Lavaca County	Agate Petrified Wood	29.5580, -97.1321	Public
Llano countyWest State Highway 71	Llano County	Topaz Zircon	30.6294, -98.5274	Public
Area surfaces all around SmithvilleTX 71	Bastrop County	Agate Petrified Wood	30.0160, -97.1478	Public
Babyhead to Miller Mt	Llano County	Llanite Opal-quartz	30.7995, -98.6410	Public
Banks of Llano RiverRanch Road 1871	Mason County	Crinoid Stems	30.6598, -99.3244	Public
MathisSouth State Highway 359	San Patricio County	Moss Agate	28.0383, -97.8598	Public
General AreaEast State Highway 44	Webb County	Petrified Palm	27.9418, -98.8893	Public
Rabb's Creek	Fayette County	Petrified Wood Opalized Wood	30.0666, -96.8791	Public
Ranches W of MasonGrit Happens	Mason County	Amazonite Feldspar Quartz Blue Topaz Clear Topaz Black Tourmaline	30.7798, -99.3432	Public
StreeterUS Highway 377	Mason County	Amazonite Feldspar Smoky Quartz Blue Topaz Clear Topaz Tourmaline	30.7656, -99.3796	Public
LampasasNaruna Road	Lampasas County	Fluorescent Calcite	31.0561, -98.1873	Public
Hinton CreekCo 364	San Saba County	Chalcedony Chert	31.0145, -99.0645	Public
SW of Freer	Duval County	Agate Silicified Wood	27.7726, -98.7653	Public
General AreaNorth US Highway 281	Lampasas County	Celestite	31.1373, -98.1834	Public

San Antonio rockhounding FAQ

Where can I go rockhounding near San Antonio?+

There are 32 mapped rockhounding spots within about 150 miles of San Antonio, Texas. The closest is New Braunfels in Comal County, roughly 31 miles away. The full list is on this page with coordinates and drive times.

What rocks and minerals can you find near San Antonio?+

Spots within driving distance of San Antonio most commonly produce agate, petrified wood, chalcedony, agatized wood, jasper, amazonite.

Is rockhounding legal near San Antonio?+

Casual hand collecting of common rocks and minerals is allowed on most BLM and U.S. Forest Service land, with limits set by the local field office. National parks, most state parks, and tribal land are off-limits. Each spot page on this site lists access status; always confirm current rules with the managing agency before a trip.

How far do most rockhounders drive from San Antonio?+

Most weekend trips from San Antonio fall inside a 2 to 3 hour drive, which is roughly the 150-mile radius shown on this page. Closer spots are good for half-day outings; the outer ones are better as overnight trips.

More state coverage

The spots above span 1 state. Open the state page for the full county-by-county view.

All Texas spots →

Pack San Antonio's rockhounding map in your pocket

Open RockHoundR for live land overlays, weather, geology, directions, and saved finds — wherever the drive takes you.