Originally Posted by
tarwheel
Here's another idea. The Adventure Cycling Association has a Portland to Crater Lake trip planned for August 2-16 this year. Contact them and see if they will share their route. They would probably be more than willing to do that, since that's one of their missions -- developing cycling routes.
Portland-Crater Lake Loop | Guided Tours | Adventure Cycling Association
I tried that very approach a few years ago when planning a route in MT. One of their tours was going between two points I was looking at. I emailed them asking for their exact routing because I couldn't figure it out from the on line tour description. I got no response, and I have been a member since '99. I am active on their forum and I have noticed that, while they give advice about resources to help plan routes (e.g., state bike maps) and comment about specific roads when questions about them are posed (e.g., "What is the Skalkaho Highway like?"), they don't seem to like to recommend specific routing to people. Perhaps it has to do with liability.