1) Appalachian Trail follower 2) Appalachian trail traveler 3) Appalachian Trail user 4) Appalachian Trail visitor 5) Backpack carrier 6) Backpack lugger 7) Backpack toter 8) Backpacker 9) Backpacker on a trail 10) Backpacking sort 11) Boy Scout, sometimes 12) Canteen carrier 13) Certain outdoorsman 1) Backpacker 2) Center 3) Lineman 4) Raiser 5) Traveller 6) Walker 7) Rambler 
[n] - a foot traveler
Typically an ankle high rugged style of footwear geared for outdoor use, derived from shoes used by hikers