One of my favorite rides is from Boise to Missoula. The ride from Boise to Grangeville is nice, it goes through beautiful McCall, and Hells Canyon is, umm, interesting. We took a rest near Hells Canyon, and I got this picture:
Just past Grangeville, you turn southeast and head into the canyon carved by the Clearwater River. At the beginning of the canyon, this sign gives you an idea of what is to come:
The next 99 miles are motorcycle nirvana. Fast, sweeping curves along the river. The road is smooth, and there is no traffic. You can smell the pine trees and river, hear the resonance of your exhaust, and feel yourself leaning deep into the turns. There are nicer and more scenic roads out there, but when we road this last summer, it was about as perfect as it could get.