For 2020, the length of the Appalachian Trail from Maine to Georgia (or vice versa) is officially 2,193.0 miles, as documented in this classic work.
Sometimes termed "the bible of A.T. hiking" because of its use in essential hike planning, each year's Data Book consolidates the most basic information from 11 detailed official guidebooks into a lightweight table of distances between major Appalachian Trail shelters, road-crossings, and features. It is divided according to the guidebook volumes and updated each December to account for Trail relocations, new (or removed) shelters, and other changes. In addition to codes for lodging, food, water, and other essentials, the Data Book is keyed to both the individual guidebook sections and to the separate maps.
Also available as part of the Thru-Hiker Starter Pack but, because of sales promotions.
Compiled since 1983 by Daniel D. Chazin of Teaneck, N.J., a volunteer with the N.Y.-N.J. Trail Conference. Forty-second Edition, 2019.
Batteries not required.
Minderella (Submitted on Jan 21st 2020)
I had no real idea of distances and the whereabouts of some sleeping arrangements. This will be a very useful tool for my hike and maybe for others if I can help.
Jim Smith (Submitted on Jan 18th 2020)
This is a great guide to the AT. It has all the latest trail updates.
Mike (Submitted on Jan 17th 2020)
Currently reviewing this book for my upcoming 2020 Thru-Hike.