This is absolutely not an answer to your question. However, since I live in Eugene and we have a great route to the coast that is rarely used and a so-so route that is quite popular, I thought I should chime in to recommend the great route. Don't go to Florence from Eugene. Instead, go directly to Reedsport. Do not pass Go, but do pass Crow. See http://www.mapmyride.com/routes/view/31073976 Don't be put off by the 90 mile distance; all the hills are early and there are numerous places to call it a day along the Smith River. It's easier to follow than the map would indicate, just follow the pavement (chipseal, actually). The only potentially troublesome turn has a huge BLM map at the intersection. No services or cell reception between Eugene and around mile 80, so bring what you need. I have ridden loops out there and not seen a car for over 100 miles.