The Historic Homestake Opera House is described by paranormal investigators as severely haunted, particularly the old pool area in the basement, with claims of disembodied voices, physical pushes, and a heavy, shifting atmosphere. Events described include an entity pushing past investigators and a woman reporting a negative male spirit that attached to her and needed to be removed by a Reiki practitioner. A paranormal team known as History Below The Pines filmed a video there where they claim an "unidentified ghost jumped out of the wall". One report describes something "pushing past" and "saying my name, 'Sarah,' on camera" in the basement pool area. Investigators noted a heavy, cold air and a shifting atmosphere in the basement, which made their hair stand on end. A woman reported a negative male spirit from the basement attaching to her and needing removal by a Reiki practitioner. Another incident involved an "unidentified ghost" allegedly "jumping out of the wall" during a filming session in the tunnels. The group History Below The Pines has documented their experiences in the Opera House's tunnels and basement, including live streams and video recordings. The old pool area is considered the scariest part of the Opera House. The building's history, potentially linked to the active Homestake Mine, is believed to contribute to the paranormal activity.