Directions to Lake Leamon Lake Leamon is conveniently located just off I-40 in Duplin County near Wallace, North Carolina. Using GPS? Set your destination address to: 361 Lake Leamon Rd Wallace, NC 28466 From I-40 eastbound, take exit 385. Turn left on NC Highway 41. Turn right on road beside the Mad Boar Restaurant and follow the signs to Lake Leamon. From I-40 westbound, take exit 385. Turn right on NC Highway 41. Turn right on road beside the Mad Boar Restaurant and follow the signs to Lake Leamon.