10 am. The 1st Annual Union Half Marathon will start and end at the Visitor Center in Big Stone Gap, VA. The course will utilize the paved Greenbelt Trail in Big Stone and then unite with the newly created paved Powell River Trail in Appalachia, VA. Participants will be able to go through the two old train tunnels that make up the Powell River Trail. All participants will receive a unique finishers medal and a high quality performance long sleeve shirt.