2015年1月9日 · The Appalachian Trail is marked with white rectangles, 2x6 inches, called white blazes. The Appalachian Trail is 2189.2 miles in length (as of 2015). It passes through 14 states, Georgia, North Carolina, Tennessee, Virginia, West Virginia, Maryland, Pennsylvania, New Jersey, New York, Connecticut, Massachusetts, Vermont, New Hampshire, and Maine.