Stuart Isaac, 48, of Burtonsville, Maryland, disappeared in Yellowstone National Park after a cross-country trip he began on September 6, 2010. He spoke to a high school friend in Guam on September 24 and said he was en route to Yellowstone; that call was the last confirmed contact.

On September 26 his black 2009 Lexus IS-250 with vanity plates BELLEK was found unlocked at Craig Pass in Yellowstone with the keys inside. There were no signs of Stuart, no nearby hiking trails at the car site, and he reportedly had no experience with hiking or camping. Park rangers and other authorities conducted extensive searches but found no trace of him.

The case remains open and unsolved, with no significant clues to explain the disappearance. Anyone who was in Yellowstone around late September 2010 or who has information about Stuart’s travel plans is asked to come forward.