Location info on the Twisted Sisters:
http://www.bestbikingroads.com/motor...--_f211e1.html
And if you're looking for twisty roads in your own area, that site has motorcycle roads all over the world. In the US, you can drill down by state and look at the maps. The roads lined in red are best.
http://www.bestbikingroads.com/motor...des-in-america