The ADT comprises 6,800 miles (10,944 km) of trails, though this includes a loop in the Great Plains and Midwest where the trail splits and becomes two parallel trails. It is possible to walk from coast to coast using only 5,000 miles (8,000 km) of trail. Horses and bicycles are allowed on most segments of the trail.
Parts of the trail runs parallel to the Lincoln Highway, which was the first transcontinental highway.
The official termini are:
The ADT passes through the following states:
- West Virginia
The ADT is also accessible from the District of Columbia.
The ADT passes by several major cities which are probably good points of entry. A few of the cities on/near the ADT are:
- San Francisco
- Carson City
- Denver (Going east, the trail splits near Denver)
- Kansas City
- Des Moines
- St. Louis
- Near Chicago
- Cincinnati (Going west, the trail splits near Cincinnati)
- Harper's Ferry (The Appalachian Trail also passes through Harper's Ferry)
- Washington, D.C.
The following long-distance walking trails connect or come within close proximity to the ADT:
North Country National Scenic Trail: A 4,600 mile (7,400 km) walking trail that crosses the northern Midwest from New York to North Dakota. The NCT might connect to the ADT somewhere in southern Ohio.