National Scenic Trails were authorized under the National Trails System Act of 1968 (Public Law 90-543) along with National Historic Trails and National Recreation Trails. National Scenic Trails and National Historic Trails may only be designated by an act of Congress.
| Trail Name | Year Established | Length Authorized |
|---|---|---|
| Appalachian National Scenic Trail | 1968 | 2,174 |
| Pacific Crest National Scenic Trail | 1968 | 2,638 |
| Continental Divide National Scenic Trail | 1978 | 3,100 |
| North Country National Scenic Trail | 1980 | 3,200 |
| Ice Age National Scenic Trail | 1980 | 1,000 |
| Florida National Scenic Trail | 1983 | 1,300 |
| Potomac Heritage National Scenic Trail | 1983 | 700 |
| Natchez Trace National Scenic Trail | 1983 | 695 |