Bradley Jay Kephart, also known as Brad, Radley Jay Kephart, or Rock Metal, was 35 when he was last seen at his homestead near Donkey Lake, west of Mount Yenlo in the Matanuska-Susitna Borough of Alaska on July 12, 1990. He was living at Donkey Creek Lake near Talkeetna when he vanished; descriptions note long graying hair, a full beard, and a mustache.

No official missing persons report was filed with the Alaska State Troopers until November 15, 1990, leaving a significant gap between the last sighting and the report. There is no public information about what he was wearing or any possessions he had when he disappeared. The Alaska State Troopers in Anchorage maintain the case file, and no substantial leads have been reported.

Does anyone who lived or worked near Donkey Creek Lake or Talkeetna in July 1990 remember seeing Bradley or his homestead that summer?