Under a quiet stretch of protected Hill Country land north of Austin, a team of researchers and volunteer cavers has finally slipped through an opening so tight it kept them out for years — and what they’re finding hints at something bigger than a single hole in the ground.
The work is unfolding at the Pecan Springs Karst Preserve in northern Williamson County, where the Hill Country Conservancy says a “unique set” of three sinkholes may connect into a hidden cave system. Details are still limited, but the original post and follow-up reporting describe a breakthrough this spring: cavers managed to squeeze into a sinkhole that had been inaccessible.
A trio of sinkholes, spotted from above, drew experts in
The three sinkholes were first flagged in 2022, when Zarria Environmental Consulting used LiDAR — Light Detection and Ranging — to map the ground surface with laser pulses. That kind of mapping can reveal subtle dips and collapses that are easy to miss at eye level, especially on rugged or brushy land.
The Conservancy later noted the sinkholes have been nicknamed Barry, Robin, and Maurice — a low-key Bee Gees nod that helps keep the “triplets” straight when teams talk about them in the field.
The moment they got in: a tight opening finally gave way
In a June 12 Facebook post, the Hill Country Conservancy said cavers were able to squeeze through a tight opening in one of the triplet sinkholes this past April. That entrance, in the Barry Sink Hole, had previously blocked access…