If you try to ride your boat on this river, there is a good chance you could hit the bottom. Located in northwest Bexar County, just outside of San Antonio, the White River is too much of an intermittent stream to be navigable. While there are parts of the river that are deep and wide enough to be traversed by a small boating craft, there are simply too many shallow and narrow parts for the entire river to be navigable. Furthermore, there are numerous waterfalls along the river, including Silver Falls, which make for clear and present road blocks along the river.
Although this is considered to be one of Texas's most scenic rivers, flowing right through the part of Hill Country where Lyndon B. Johnson grew up, this river is either too shallow or too dangerous for navigation. When it is not raining, the river is generally too shallow to support any boating device and will not generate enough flow to push any type of boat along. However, during the rainy season, the question about this river is not that of not enough water but simply too much of it---the rainy season makes for some turbulent rapids that only the most expert of all whitewater rafters can navigate.
This cypress-lined river, located in the heart of Texas's Hill Country roughly 80 miles west of San Antonio, is non-navigable not because it is a hazard to boats but because of the roadblocks many local landowners have put in. Even though it is technically against Texas state regulations for the landowners to restrict access to rivers that land on their property, this does not stop them from building barbed-wire fences across the river. If you try to navigate down this river, your boat stands a good chance of getting damaged from hitting a fence.