This years ride with my buddies started in CO. We rode through UT to Hell's Canyon on the OR, ID border and then up through WA before heading east and, for me, eventually ending up in MD. I just wanted to mention Lolo Pass between ID and MT. Absolutely one of the most fun roads that I have been on. On the ID side there is a sign that says "Twisty Road the Next 166 Miles". Too much fun. The scenery is great also. I highly recommend taking this route if you are in the area.