Highway 410 through Enumclaw toward Chinook Pass. Follow the signs to the Howard Hansen (aka Mud Mountain) Dam. Stop and take a look - the Army Corps of Engineers is almost PROMISING flooding, if not breaching, this winter. So see it before its gone.
Take the twisty back roads back toward Enumclaw. This is where Enumclaw's own, Kasey Kahne, cut his teeth at the wheel. And, while I'm NOT a NASCAR fan (open wheel only) Kasey is a pretty cool dude.
Enjoy and catch a post drive burger at The Mint restaurant in downtown(?) Enumclaw.
If you go to either of the Bmw motorcycle dealerships, Ride West, in the University distrcit, north of downtown or South Sound Bmw, in Fife, they carry a book describing in great detail, literally hundreds of twisty road trips in the Pacific NW. Can't remember the title off the top of my head, but it is easy to find at one of those two dealerships. It rates the trips for twistiness, road condition, and even how often the local boys in blue are seen, or not seen. It is a little spendy, about $50 to $60 , as I recall, but a great source of driving information.