The soil changes over a short distance along this stretch, from the loose sand that supports the Lost Pines to the dense dark clay of the Blackland Prairie approaching Austin. That single change decides almost everything visible from the road — which trees grow, whether water sinks in or runs off, what was farmed and what was grazed, even how the fences sit. The boundary is not a fault or a ridge but simply the edge of one ancient sediment layer against another, both laid down along a Gulf shoreline that has moved back and forth across this country for tens of millions of years.
Getting there
30.1600, -97.4800
Locations are approximate and may be inaccurate, on private land, or otherwise inaccessible. Check before you travel.