On July 2, 1966, 19-year-old Patricia Blough disappeared from Indiana Dunes State Park after going into Lake Michigan with friends Ann Miller and Renee Bruhl. The three women had driven from Illinois for a summer day at the beach and were last seen leaving belongings on the shore and entering the water around noon.

Multiple witnesses reported the women boarding a small white boat piloted by a man described as in his early twenties with dark, wavy hair. A search did not begin until July 5, after families filed missing person reports; park rangers and the U.S. Coast Guard conducted extensive searches but found no trace of the women or the boats. There were later unconfirmed sightings of the women with other unidentified people on a larger boat, and some investigators have noted Blough’s involvement in the horse racing community and her reported problems with people connected to a horse syndicate.

The disappearance remains unsolved and no substantial evidence has emerged to explain what happened that day. If anyone knew Patricia, Ann, or Renee, or remembers the small white boat or the larger vessel seen later that afternoon, please share what was seen.