Mark Littleford was 11 years old when he disappeared on August 28, 1984, near Iliamna Lake in remote Alaska. He was last seen wearing a blue down vest, a dark long-sleeved football-style shirt with an unknown logo, blue jeans and light brown chest waders with dark feet.

The official account states he is presumed to have drowned after a floatplane reportedly went down; Mark and another person, Phillip Littleford, are believed to have attempted to swim to shore in Iliamna Bay. The area’s isolation and the bay’s cold, treacherous waters are cited as factors that would have made rescue unlikely.

The Alaska State Troopers maintain an active case file. If anyone was in the Iliamna Lake or Iliamna Bay area in late August 1984 or has information about the floatplane or those on it, please come forward with what you know.