Selected by someone with no name (only an email address): Christopher Charles Hallaxs, age 30, missing from northern Michigan since March 17, 2004. He was 30 years old. He was last seen on a camping trip; he had plenty of supplies with him and was an experienced outdoorsman who kept caches of food and additional supplies at various spots in the Michigan wilderness. He had the capabilities to stay out for a long time.
But ten years is stretching it.
Christopher’s grandmother apparently thought there’s a chance he’s still alive: in her obituary in 2013, he’s listed as a survivor.