Senia Marie Matson was 58 when she vanished from a cabin on Carp Lake in Trout Lake Township, Michigan’s Upper Peninsula. The last known time she was seen was about 4:00 a.m. on July 3, 1983, after she had consumed a large amount of alcohol and walked away from the cabin into dense woods. No confirmed sightings, calls, or other communications were made after she left.

At the time she disappeared Senia was described as a white woman about 5 feet 4 inches tall and 140 pounds, with brown hair, green eyes and prescription eyeglasses. She was wearing blue jeans, a light blue sweatshirt and maroon tennis shoes, and had a gold wedding band and a gold watch. Distinctive scars included those from mastectomies on both breasts and a scar on her upper left arm from tattoo removal.

Extensive air and ground searches produced no trace, and investigators noted she sometimes experienced periodic memory lapses, which raised concern she could have become disoriented in the woods. Another possibility mentioned is that she may have reached a road and accepted a ride, but neither theory has been confirmed. The Michigan State Police list the case as 83-690-12 and NamUs MP9786; family DNA reference samples from a daughter and son are on file. If anyone knew Senia or was in the Carp Lake area that night, can you share information that might help her family?