The Blanco River Narrows Is One of the Best Swimming Holes in Texas

There are few things (besides barbecue) that get Texans more heated and excited than an under-the-radar swimming hole. And tucked along the Blanco River in the Texas Hill Country lies a mythical swimming spot few have seen—or even heard of.

Here, miles away from the nearest public road, a small canyon carves into curving limestone. Within is a hidden world of trickling springs and deep, dark pools. As you descend into the canyon from the dry riverbed, all sounds cease, save for the dripping of spring water. Maidenhair ferns wave gently on the canyon walls, and curious fish swim up to the surface, their translucent fins fanning out on either side as they tread water. This wonder is known as the Blanco River Narrows.

Flanked on either side by private land, the Narrows is accessible only by a challenging hike through the (mostly) dry bed of the Blanco River. For the intrepid adventurer who is up for the journey, the Narrows is a worthy quest. 

“It’s the culmination of this grueling experience, and then you’re in this almost otherworldly, magical, hidden place that so few people get to go,” says Wes Ferguson, a Texas-based writer and author of the 2017 book “The Blanco River.” “It’s incredible.”

Once, the land around the Narrows was owned by a family who would invite people to park on their property for a small fee and walk down to the pools. Now, it’s a bit more difficult to get to. If you don’t have a direct connection to one of the landowners, there are currently only two routes to reach the Narrows.

Earlier this summer, we decided to make the trek via the upstream route. The round-trip journey involves more than 14 miles of hiking through a (mostly) dry riverbed, starting at a low-water bridge over the Blanco along Chimney Valley Road. The other route starts downstream, and although it’s a slightly shorter hike, there are more water crossings. 

Both entry points require hikers to stay in the riverbed—which is public land according to Texas law—the entire time to avoid trespassing. Keep in mind that even though walking the riverbed to the Narrows is legal, this hasn’t stopped local landowners from trying to intimidate hikers. Having read reports where hikers returned to their cars to find their tires slashed, we chose to take a rideshare to the bridge instead. 

As we stepped out of the car in the predawn darkness, the reality of our undertaking hit: we were suddenly alone without a vehicle in the middle of nowhere. We were also in for a long walk on uneven terrain, neck-deep water crossings, and would have to bear the stifling heat of a Texas summer afternoon on our return. We took a deep breath and stepped off the rocks near the low bridge into the dark water. 

Our hike to the Narrows took around 4.5 hours. The first half a mile or so was flooded from recent rain, and at one point, the river was so deep our feet could no longer touch the bottom. Much of the rest of the hike was dry and traversed gentle gravel bars or smooth limestone expanses, skirting the edges of grassy bluffs and rocky cliffs.

As we neared the end, the riverbed widened into a seemingly endless field of tall grasses interspersed with boulders, making for slow going. Then, it constricted again into a rocky channel dotted with sycamore trees, and the rocky ground gave way to solid sheets of water-carved limestone. Finally, the limestone bed split open, and we saw the gorge. 

The first pool we encountered was cool, green, and shallow. As we swam down the length of this pool, the rest of the Narrows opened up before us. Stair-stepping downstream between the fern-covered canyon walls were a series of limestone shelves and pools so deep they looked black. We tied our 50 feet of rope to a convenient column in the rocks and jumped in. 

The pools themselves were wonderful, the edges impossibly smooth. “One of the fascinating geological marvels [here] are those potholes,” says Ferguson. “They were formed over millennia by rocks that get stuck and [started] swirling when the water flowed over. That slow grinding of these little rocks just swirling around ended up creating these massive potholes … Legend has it that they’re bottomless.”

I swam down to try to see the bottom, but no luck. The pools may look bottomless, but I later learned they’re between 20 to 50 feet deep. Some are connected underwater, and I swam between them under gorgeous submerged arches.

The Narrows extends for a quarter mile, and at times, the 40-foot-tall canyon walls are no more than 10 feet apart. Its lush fern-covered springs are a sharp contrast to the surrounding dry riverbed, and I wondered why the Blanco emerged from underground at this particular spot.

“You know, in a way it doesn’t,” he says. “The river is flowing underground beneath the riverbed. But in that spot, the riverbed kind of cracks open, and so you’re essentially looking down into a cave that has lost its roof.”

As we packed up and left the Narrows, steeling ourselves for the seven-plus-mile hike back to the bridge where kindhearted friends would pick us up later that afternoon, I felt grateful to have experienced this Texas natural wonder. I don’t know if I will make the trek again, but I know the beauty of the Narrows will reappear in my dreams for years to come.

If you choose to visit this magical place, be respectful and practice Leave No Trace principles. Pack out what you pack in, and don’t take fossils or artifacts you find. Before you begin your adventure, do research on the hike. While our journey to the Narrows was smooth, online accounts can give you some ideas of other obstacles you may encounter. Come prepared with water, food, and rope, and take extra care not to trespass by staying in the riverbed. As you approach the Narrows, purple paint markers on the rocks indicate the boundaries of private property. 

“I think that the landowners … feel like they are the protectors of this magical place,” says Ferguson. “So, I understand where they’re coming from, and I think that the best argument for the rest of us to continue to have access [to it] is by protecting this place and by cherishing it.”