You wanna REALLY fall in love? Do this loop,,21 road to Lowman, gas up in Idaho City, then,, Banks /Lowman road (17) to Banks, then back to Boise following the river. Lunch and beers in Banks. Watch your speed, they patrol all aspects of this awesome day loop. But if you like curves as much as I do, this is some of the best! I have done the Banks/Lowman road back and forth many times, it is one of my favorite roads on earth.