TALLASSEE - Searchers found an ATV belonging to a missing Happy Valley man at 12:05 p.m. today, about a mile from his family's home. Personnel from multiple agencies today are searching in the rain in a remote area of South Blount County for Michael Hearon, 51, missing since midday Saturday. Hearon was last seen Saturday at his family homeplace at the end of Bell Branch Road, which is in the Happy Valley community. His ATV was found about 30 yards off Happy Valley Loop, about a mile from the home, officials said today. Authorities were bringing in a Blount County Sheriff's Office track dog in an attempt to pick up Hearon's trail. Jerry Hearon said his brother drove to the home Saturday with the intention to mow the grass. His truck and the trailer with the mower are still at the home, and the mower was apparently never unloaded. Jerry Hearon said his wife called him at work at about 9 p.m. Saturday and told him other family members had reported his brother missing. The search began in earnest early today and involved the Blount County Sheriff's Office and its specialized search and rescue team, as well as the Blount County Fire Department and rangers from the National Park Service. The home abuts the Great Smoky Mountains National Park. Jerry Hearon said earlier it's unknown whether his brother may have become lost on a hike or may have been injured. He said his brother has mildly high blood pressure but no other serious health issues. More details as they develop online and in Wednesday's News Sentinel.