Blue Hole is part of the “remarkable ecosystem” of the Frio River and very much part of the environmental conservation strategy to protect the river from pollution or degradation.
In the blazing heat of 100-plus-degrees, the clear, blue-green waters of Blue Hole have been a treasured part of the camping and retreat experience for thousands of guests.
The Foundation’s most famous swimming hole is located near the headwaters of the Frio River, directly below the iconic Circle Bluff.
And it’s been a much-anticipated and beloved tradition for campers of all ages to jump into the very chilly waters of the swim hole. For LLYC campers, the reward comes after a nearly three mile hike from Echo Valley or a shorter hike from Singing Hills.
Beyond the appreciation of campers and guests, Blue Hole has won praise from outside experts: “The Blue Hole at the H. E. Butt Foundation Camp is beautiful and special because you have this beautiful, spring-fed water,” said Ben Hutchins, biologist with the Texas Parks and Wildlife. Over centuries, the water has sculpted the surrounding limestone walls into visually pleasing contours and deep trenches, creating what Hutchins described as “this beautiful canyon with forested hills and slopes all around.”
While it hasn’t been precisely measured, the Blue Hole is estimated to be 30 feet at its deepest.
But Hutchins is quick to point out that the colloquial term “blue hole” is inaccurately but commonly used to describe swim holes. The scientific term to describe a blue hole is “cenote,” a natural well or reservoir.
Hutchins describes the Foundation’s swim hole more as an underwater pothole—a space formed in cave and surface streams very slowly as boulders and pebbles and sand tumble around in flowing water, slowly digging out circular depressions.
Whatever it may be called, Blue Hole remains a beloved touchpoint in the overall Canyon experience.
“When you’re in the water, you can feel the water welling up around you, and you can feel this water kind of surrounding you. It’s very special,” said Dan Roloff, the Foundation’s Legacy Steward and historian.
John Kerr, the Director of the Foundation Camp, says the swim hole serves practical purposes for campers during scorching summer heat.