Here is a route that I ride often. I start at Red Rock Conrers and use Rt 118. The route include interstate highway to 2 lane twisties, There are many places to take a break. a over look or two and a few twisties. eats and coffee are pretty good, a new winery or two are added each year. The traffic can be thick depending on the day of the week. If the road is choked you only need to turn to the inside and you will find your way back to the rally. There are a few GS roads but I know little of those routes.
http://maps.google.com/maps/ms?ie=UT...9,4.031982&z=8 (hope this link works)
Once the weather breaks I will do a ride report.
I am sure the are many other loops that others can post, and we look forward to riding them.