On October 2, 1968, Congress passed the National Trails System Act. This Act called for the establishment of a system of national scenic trails "which will be extended trails so located as to provide for maximum outdoor recreation potential and for the conservation and enjoyment of the nationally significant scenic, historic, natural, or cultural qualities of the areas through which such trails may pass." As a result of the 1978 amendment to this Act, Congress designated the Continental Divide National Scenic Trail (CDNST) as part of the National Scenic Trail system. The CDNST is a trail route traversing the length of the Rocky Mountains, in close proximity to the Continental Divide for approximately 3,100 miles, through the states of Montana, Idaho, Wyoming, Colorado, and New Mexico.
United States Department of the Interior, Bureau of Land Management, "Environmental Assessment for the Designation of the Continental Divide National Scenic Trail" (1998). Environmental Assessments (WY). Paper 18.