Bryan,
You might start with
www.bycycle.org. That will lay out a pretty detailed route.
Once you ride it, if you have questions about specific tweaks, jump back in here and ask.
If you haven't already done so, you might also want to check out the Portland Department of Transportation Bicycle page, it's a great compendium of local resources, maps, etc..
http://www.portlandonline.com/transp...ex.cfm?c=dehhc
Welcome to the area, and hope this helps.