Old Spiral Highway is one of the best motorcycle roads in Idaho, USA. The very twisty road (64 curves) is short, is curvy, is smooth, and is most definitely sweet. Don’t stuff your belly too much.
The Old Spiral Highway, aka "The Old Lewiston Grade" is 7.3 miles long. There are sheer drops virtually along the entire route and enough hairpins to make a whirling dervish dizzy. Constructed in 1917 the Spiral Highway took 64 turns to traverses 2000 feet of elevation change. The road is asphalted.
A quick glance at the map at its sheer drops and serpentine twists and turns, confirms that this is no hype. This old 2-lane of alignment of US Route 95 heads up the breathtaking 2000 foot tall grade in a very short 8 miles. The road is loaded with twists and turns and dramatic switchbacks. It is also freshly repaved - too good to be true. The drive is definitely worth it. A drive not to be missed.