Going to the Sun Road is a 53 mile long road through the heart of Glacier National Park, crossing the Continental Divide at Logan Pass. The road is one of the most difficult to plow in the States and closes during the winter. The date of it's opening depends on how quickly they can remove the snow. I arrived at Glacier National Park on June 16th. The road opened on the 17th and I crossed over heading west on the 18th.
There were two competing designs for the road. One was to show mastery over nature and featured a number of switchbacks. The other was designed to be in harmony with nature and blend in with the landscape. This is the design that ultimately was chosen. It has one switchback and the grades are much less.