U.S. National Scenic Trails Map

The North Country Trail crowns the country, stretching from the Adirondacks in New York State to the Great Plains of North Dakota. The Appalachian Trail is the grand-daddy of long distance trails. First envisioned in 1921 as a greenway from Maine to Georgia, the trail hugs the crests of the Appalachian Mountains.
The Ice Age Trail traces the glacier moraine from Lake Michigan to the Saint Croix River in Wisconsin. The Potomac Heritage Trail stretches along the  Potomac River from Maryland on up to Pennsylvania's Laurel Highlands.
The Pacific Crest Trail was designated in 1968 at the same time as the Appalachian Trail. It follows the crest of the Sierra Nevada and the Cascade mountain ranges. It passes through four national parks and several national forests. The Natchez Trace follows an old Native American route that connects Nashville, Tennessee to Natchez, near the Mississippi border.
The Continental Divide Trail is a high altitude trail along the spine of the Rocky Mountains and New Mexico. It passes through three national parks and many national forests. The Florida National Scenic Trail is the only National Scenic Trail that doesn't cross state lines. It explores subtropical Florida, from the Big Cypress National Park and Preserve to the Gulf Islands National Seashore.