Originally Posted by
forrest_m
Oh, another very popular loop is from Leschi south to renton, then Cedar River Trail to Cedar Grove Road, up to Iss-Hobart and return via May Valley road, coal ck., I-90, always lots of cyclists on that route.
+1
One more in that area -- there are some nice loops out around Black Diamond. you can start in Black Diamond, ride out to the Green Valley Gorge, along the Green River Valley toward Auburn, go to Flaming Geyser State Park, then pick one of several ways to get back up to Black Diamond.
Also, Matt, the maps library at the Seattle Bicycle Touring Club has lots of good routes.
http://www.seattlebiketours.org/