The Idaho State Centennial Trail extends about 1,200 miles from Nevada to the Canadian border. It passes through 11 national forests, 1,200 miles of rugged sagebrush desert, and the largest contiguous wilderness in the lower 48 states. The trail was designated as part of the 1990 Centennial Celebration. The idea for the long-distance trail was conceived when two Idahoans, Roger Williams and Syd Tate hiked a similar route in 1986. After extensive planning and public comment, the trail was officially designated by the Idaho Park and Recreation Board on June 1, 1990. Through the Board's designation, the Idaho State Centennial Trail became the first trail to be adopted into the State Recreational Trail System (Idaho Code 67-3232). The Idaho State Centennial Trail was designed using existing on-the-ground trails, and in some cases backcountry roads when connective corridors were needed. The creation of the Idaho State Centennial Trail was a cooperative effort of those listed below: Idaho Department of Parks and Recreation Provides overall trail coordination. Idaho Centennial Commission/Lasting Legacy Committee Endorsed trail as an official Centennial Project. Idaho Trails Council Coordination for trail signing and maintenance. Bureau of Land Management Managers of southern section of trail. U. S. Forest Service Managers of the middle and northern sections of the trail. Private and public land managers Allow trail users to cross their property.

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