Airline Trail is a hiking trail in Coös County, New Hampshire. It is within White Mountain National Forest. It is 3.8 miles long and begins at 1,319 feet altitude. Traveling the entire trail is 7.8 miles with a total elevation gain of 4,570 feet. The Appalachia trailhead parking (elevation 1,312 feet) parking is near the trailhead. There is also an information map. Mount Quincy Adams (elevation 5,358 feet) can be seen along the trail. The trail ends near Mount Adams (elevation 5,735 feet).
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