Excellent, short canyon route around Mt. Timpanogos connecting the Alpine Loop canyon to East Provo Canyon road. Lots of twisties with amazing scenery.
This is a longer ride, 4-5 hours with nice twisty canyons and straight-shot highways in a loop through Box Elder, Cache, and Weber counties. Traffic can be a bit congested as the canyons have fewer passing areas than desired but plenty of fuel stops and beautiful northern Utah scenery (especially Logan Canyon into Bear Lake).