Who has or has links to some "4 square" rides. That is, riding around the outside boundaries of the US. Say San Diego to Seattle to Maine to Florida Keys back to San Diego. Actually starting in Phoenix but you get the point. Bucket List entry.
https://www.usa4corners.org/ Here you go ronhawker, I've been a Member of the Southern California Motorcycle Association since the Sixties. Great group and fun rides!
https://sc-ma.com/The_15_Best_Roads_in_2012.html You may also want to consider the 15 Best USA Roads Challenge, I actually think it's more of a scenic event than 4 Corners Run!
https://exwis.com/fourcorners/index.html Here's a 4C's Report from my BMW Friend Fulton Martin, past President of San Diego Club when I was the Phoenix Club President.