Join Date: Jul 2007
Location: Seattle, Washington, USA
Bikes: 2014 Pivot Mach 5.7 MTB, 2009 Chris Boedeker custom, 1988 Tommasini Prestige, 2007 Bill Davidson custom; 1988 Specialized Stumpjumper
There are several ways out of Issaquah on a bike.
If you want to catch the ferry to Bremerton, you follow the I-90 bike trail all the way from Issaquah, to Bellevue, across Mercer Island, then along the bike trail to downtown. It dumps you out very close to the ferry.
That connects you with the Adventure Cycling route, as you say.
If you want to take an inland route to Portland, you can look up the route of the annual Seattle-to-Portland ride. That will get you there faster, but is not as nice as the Adventure Cycling route. You can catch it from the I-90 trail, or you can head straight south out of Issaquah and catch it in southern King County.
All of these routes are laid out on bikely.com if you look around, or get a King County bike map from King County. There are links to local bike maps at www.cascade.org
. The King County bike map is very good and shows all the major bike routes and recommended streets around the county.
A more adventurous route south to Portland is the mountainous route through Mt. Rainier National Park. The route would roughly be Issaquah - Maple Valley - Enumclaw - Greenwater - Mt. Rainier - Randall - then south from there past Windy Ridge. That route would be much hillier, much more scenic, but with fewer services.
If this is not clear I can stop by later with more detail...