BTW, the one paved trail I've found without a lot of foot traffic is the Cedar River Trail. If you're headed from Renton out toward Maple Valley, there is some foot traffic for a couple of miles and then it dies out. And if you keep going past Maple Valley it turns to packed gravel (packed enough for a road bike) and you can ride in peace for several more miles out to Landsberg. From there you can head north to Issaquah, or keep going south toward Black Diamond, etc.