The state Department of Parks and Recreation is releasing a "scoping document," including possible routes for the Idaho Centennial Trail.

The idea to designate a trail that traverses the state from the southern to northern border emerged after Roger Williams of Meridian and Syd Tate of Boise completed such a hike in 1986.The two men hiked from Nevada to Bruneau Dunes State Park. From there, they traversed the Sawtooth Mountains, walked along the Middle Fork of the Salmon River to the Selway River and the community of Powell.

Their trek took them to Hoodoo Pass, Clark Fork, Ponderay Divide, the Kootenai River Valley and finally, British Columbia.

Four possible routes have been offered for consideration: the Williams and Tate route; a route taken by Jim Mayberger and Simon Cordial this year; and two trails proposed by the Forest Service and the Bureau of Land Management.

Idaho Parks and Recreation has copies of the scoping document and is accepting public comment on the centennial route.