Old Spiral Highway is said to be 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. It’s best attempted by those who don't get dizzy very easily.
How long is Old Spiral Highway?
Located in Lewiston, the Old Spiral Highway, aka "The Old Lewiston Grade" is only 11.74km (7.3 miles) long. Originally constructed in 1917, this historic road takes 64 turns to traverses 2000 feet of elevation change. It was considered a huge feat in engineering at the time and a breakthrough in early highway construction.
Is Old Spiral Highway paved?
The road is paved. It’s a difficult road, with uncountable turns and twists. This old 2-lane of alignment of US Route 95 heads up the breathtaking 2000 ft 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 road was the subject of the 1950s rock n' roll song called "Hot Rod Lincoln". This short and technical motorcycle route is certainly one of the best rides in the area. With over 60 curves and a steadily steep elevation grade, this road is for drivers who are up for a bit of a challenge.
Is Old Spiral Highway steep?
Tucked away in Nez Perce County, in the U.S. state of Idaho, the road runs south-north from ID-128 road at 272m above the sea level, towards US-95 road, at 822m above the sea level. The elevation gain is 550 meters. The average gradient is 4.68%. The road hits a 13% of maximum gradient through some of the ramps.