Duane's take
Here's how the official marker tells it, and I'm gonna give it to you straight with a little color on the side. There's a rock in the middle of Brushy Creek, out here in Williamson County, that has been doing quiet, important work for longer than most folks care to reckon. It's table-shaped, sitting right in the creek bed, and for Indians and early settlers alike, it marked something precious: a low-water wagon crossing.
A place where you could get to the other side. Before maps were reliable and roads were anything more than a hope, that rock was the guide. You followed the creek, you found the rock, you crossed.
Simple as that. And if you doubt how much traffic that crossing saw, well, the creek bottom will settle the argument for you. Hundred-year-old wheel ruts are still visible down there.
All those wagons, all those miles, all those families headed somewhere, and the creek just quietly kept the record. The rocky stream bed gave more than a crossing, too. It gave building stone.
Pioneer homes in the area went up with what the creek floor offered, which means that same geology that let wagons roll through also put roofs over people's heads. A settlement grew up near that natural ford, and by 1851 it had enough folks to warrant its own post office, operating under the name Brushy Creek. Now, a post office name is a serious thing.
It's how the outside world finds you. And the postmaster at the time, a man named Thomas C. Oatts, apparently felt the name Brushy Creek wasn't quite doing justice to what made this place worth stopping at.
So at his urging, in 1854, the name was changed. Round Rock. Named for that table-shaped stone sitting right there in the creek, doing what it had always done.
Then came the railroad, arriving about a mile to the east, and in 1877 the town relocated to meet it, the way towns do when the iron track shows up and makes all the old routes renegotiate. But here's the thing. When the town moved, it took the name with it.
Round Rock went to the railroad, and Round Rock stayed Round Rock. That stone in the creek never moved an inch, and somehow, neither did its hold on this place.
What the marker says
A guide for Indians and early settlers, this table-shaped stone in the middle of Brushy Creek once marked an important low-water wagon crossing. Hundred-year-old wheel ruts are still visible in the creek bottom. The rocky stream bed also provided building stone for pioneer homes. "Brushy Creek" post office was established in 1851 to serve the settlement that grew up near this natural ford. At the urging of postmaster Thomas C. Oatts, it was renamed "Round Rock" in 1854. This name was retained when the town relocated along the railroad (1 mi. E) in 1877. (1975)