The White Mountain National Forest includes over 100 miles of which marked hiking trail?
White Mountain National Forest:  Over 100 mi of the Appalachian Trail traverses the White Mountain National Forest. Appalachian Trail: The Appalachian National Scenic Trail, generally known as the Appalachian Trail or simply the A.T., is a marked hiking trail in the Eastern United States extending between Springer Mountain in Georgia and Mount Katahdin in Maine.
Appalachian Trail