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.
North Idaho Centennial Trail The North Idaho Centennial Trail is a 24 mi paved trail in Idaho used for transportation and recreational activities. Extending from Higgens Point on the northeast side of Lake Coeur d'Alene, a popular place for bald eagle watchers in early winter, the trail follows the lake's north shoreline to the Spokane River where it follows it to the Idaho/Washington border. On the other side of the state border, the trail becomes the Spokane River Centennial Trail and extends for another 37 mi out to Sontag Park in Nine Mile Falls, Washington. The trail passes through the towns of Post Falls, Idaho and Coeur d'Alene, Idaho.