The Lyon County Sheriff's Office responded Saturday to a call regarding an unresponsive man in Land Between the Lakes National Recreation Area.
Around 9:20 p.m., Deputy Seth P'Pool was dispatched to the location, along with Lyon County EMS, on Kentucky Lake Drive.
Upon arrival, P'Pool found a female actively giving CPR to a man who was unresponsive in the picnic area.
Lyon County EMS determined 70-year-old Gary L. Beach of Benton was deceased when they arrived.
Circumstances surrounding Beach's death have not yet been determined. An autopsy will be performed today at the Western Kentucky Regional Medical Examiner's Office in Madisonville.
Anyone with information regarding the incident is encouraged to call the Lyon County Sheriff's Department at 270-388-2311.
Kentucky State Police, Lyon County Coroner Kris Dunn and Grand Lakes Fire assisted at the scene.