The White Mountain National Forest includes over 100 miles of which marked hiking trail?
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. The trail is about 2,200 miles (3,500 km) long, though the exact length changes over time as parts are modified or rerouted. The Appalachian Trail Conservancy claims that the Appalachian Trail is the longest hiking-only trail in the world. More than 2 million people are said to do at least one day-hike on the trail each year.
Great Eastern Trail The Great Eastern Trail is a north-south hiking route that runs roughly 1600 mi through the Appalachian Mountains west of the Appalachian Trail in the eastern United States. It is still under development as of 2016. From south to north, it runs from Flagg Mountain through Alabama, Georgia, Tennessee, Kentucky, West Virginia, Virginia, Maryland and Pennsylvania, ending in western New York state. A connection from Flagg Mountain south to the Florida-Georgia border is considered "Phase II Development".