The ride starts near the border of Montana, and it's actually best to access the route from Interstate 90 at exit 5 in Montana. The route is one of the most unique and fun rail-trail adventures that Idaho has to offer. While following the historic Old Milwaukee Road, the ride passes through 8 tunnels and about 7 high trestles. The Forest Service charges a trail fee at around $5.00, and they can be purchased at the trailhead. If you can't arrange your own shuttle, call ahead (208-744-1392) for assistance. Be sure to take a light and a helmet.