US 301 continues northeast as A.P. Hill Boulevard, which enters the eponymous military installation. East of the U.S. Army base's main entrance, the U.S. Highway passes through the forested Army reservation for without an intersection. Near the eastern edge of Fort A.P. Hill, US 301 passes the site of the Garrett farmhouse and barn where John Wilkes Booth was killed by federal troops 12 days after he had assassinated Abraham Lincoln. At the eastern edge of the military base, the highway intersects US 17 (Tidewater Trail). US 301 becomes an undivided highway as it passes through the town of Port Royal as Main Street, then uses the James Madison Memorial Bridge to cross the Rappahannock River into King George County.