There are some good roads in Snoqualmie valley that don't take hours to get to, but depending on when you go, traffic could slow you down.
http://www.m3post.com/forums/showthread.php?t=1284109
Overall Seattle is a hell hole for driving enthusiasts. Bad/super slow/timid/poorly trained drivers, state patrol everywhere on state roads and interstates, stupid speed limits, traffic, lack of nearby good driving roads, a culture of driving is bad and driving fast is worse, roads in poor condition... I could go on.