Agates near San Antonio, TX
9 of the mapped rockhounding spots within 150 miles of San Antonio report agate. The closest is Peach Creek, about 71 miles out (1 hr 29 min drive).
Agates are banded chalcedony nodules that survive long after their volcanic host rock rots away, which is why they concentrate in gravel bars, beaches, and glacial deposits far from where they formed.
Map of 9 agate collecting spots within 150 miles of San Antonio, Texas
Closest agates spots to San Antonio
- Peach CreekGonzales County, Texas71 mi · 1 hr 29 min driveAgate, Petrified Wood
- MoultonLavaca County, Texas82 mi · 1 hr 43 min driveAgate, Petrified Wood
- Area surfaces all around SmithvilleBastrop County, Texas91 mi · 1 hr 53 min driveAgate, Petrified Wood
- MathisSan Patricio County, Texas103 mi · 2 hr 9 min driveMoss Agate
- SW of FreerDuval County, Texas115 mi · 2 hr 24 min driveAgate, Silicified Wood
- Eagle PassMaverick County, Texas128 mi · 2 hr 41 min driveAgate, Amber, Chalcedony
Types of agates reported near San Antonio
Counts reflect how many spots in this radius mention each variety.
- Agate6
- Turritella Agate2
- Moss Agate1
Every agate spot within 150 miles of San Antonio
Sorted by distance from San Antonio. Tap a row for directions, access status, and nearby trips.
| Spot | County | Minerals | Coordinates | Access |
|---|---|---|---|---|
| Peach CreekCounty Road 353 | Gonzales County | 29.5041, -97.3143 | Public | |
| MoultonCounty Road 532G | Lavaca County | 29.5580, -97.1321 | Public | |
| Area surfaces all around SmithvilleTX 71 | Bastrop County | 30.0160, -97.1478 | Public | |
| MathisSouth State Highway 359 | San Patricio County | 28.0383, -97.8598 | Public | |
| SW of Freer | Duval County | 27.7726, -98.7653 | Public | |
| Eagle PassStone Hill | Maverick County | 28.7373, -100.4712 | Public | |
| Rio Grande River AreaRio Grande Vega Trail | Webb County | 27.4979, -99.4922 | Public | |
| Limestone road cutsFarm-to-Market Road 107 | Coryell County |
| 31.3802, -97.5322 | Public |
| Limestone road cutsFarm-to-Market Road 107 | Coryell County |
| 31.3923, -97.5462 | Public |
Agates near San Antonio FAQ
Where can I find agates near San Antonio?+
9 mapped spots within about 150 miles of San Antonio report agate. The closest is Peach Creek in Gonzales County County, roughly 71 miles away (1 hr 29 min drive). The full list with coordinates is on this page.
Can I collect agates on public land near San Antonio?+
9 of the 9 spots here sit on land mapped as publicly accessible. Casual hand collecting of common rocks and minerals is allowed on most BLM and Forest Service land with limits set by the local field office; national parks and most state parks are closed to collecting. Confirm current rules with the managing agency before a trip.
What is the fastest way to spot an agate in a gravel bed?+
Look for waxy luster and translucence rather than color. Wet the stone or look right after rain: agate glows softly at thin edges when backlit, while jasper and chert stay opaque. Banding clinches it but is often hidden until the stone is cracked or tumbled.
How far from San Antonio do I need to drive?+
The nearest agate spot is about 71 miles out, and the farthest on this list is 147 miles. Most fall inside a normal weekend day-trip radius.
Keep exploring from San Antonio
Agates near other cities
Hunt agates around San Antonio with the map in your pocket
RockHoundR shows these spots on an offline map with public land overlays, geology layers, weather, and a log for your finds.
