Written in an informal style for a nontechnical audience, this guide summarizes geologic features and history of McKinney Falls State Park, just south of Austin, Texas. Part guidebook and part geologic text, the book surveys Pilot Knob, the McKinney Gristmill, the Balcones Fault Zone, natural potholes, the Smith rock shelter, "Old Baldy," and the waterfalls in the park. Includes maps and photos.