Mary Margaret Click was 21 when she left Madison, Wisconsin, intent on hitchhiking to Banff, Alberta, in the summer of 1978. She crossed the U.S.-Canada border at the Pigeon River crossing and on July 1, 1978 made the last known call to her family from Isle Royale, Michigan. After that call she was never heard from again.

On the same day as her last phone contact, some of her personal belongings were found on a dirt road off Riverside Drive in Thunder Bay, Ontario, and witnesses reported seeing a woman matching her description walking there. A month later, on August 1, more possessions were recovered in Raith, Ontario, about 92 kilometers northwest of Thunder Bay. She was described as heavy built, about 5 feet 4 inches to 5 feet 6 inches, with short curly brown hair, hazel eyes, a chipped front tooth, and she may have used the surname Podma.

The timeline — a call from an island in Lake Superior and belongings found in Thunder Bay the same day — remains puzzling. Anyone who knew Mary, traveled those routes in 1978, or has information about sightings or the recovered items is asked to come forward.