Gas Mart is on the outskirts of Leesburg, on Route 15 as you head toward the Maryland state line. Along with a self-service gas station, diesel, air pump and propane, there is a cigarette outlet with cartons of cigarettes for sale and a convenience store. The convenience store carries beer, wine, newspapers, coffee, lottery tickets, ice, hot and cold sandwiches, hot dogs, breakfast items and a variety of soda and snacks.