USA Motorcycle Tour Summer '26

I'm looking for one or more travel companions for a motorcycle tour of about 10 riding days. The West of the USA (e.g. California or Colorado and somewhere in between) would be the preferred destination. However, there isn't a concrete tour yet; we should plan one ourselves or possibly book a self-guided tour from a provider like eaglerider.com. I've been to the USA many times, also for motorcycle riding - but it's not as much fun alone. I'd like to spend a few days at the start and end points of the tour - total trip max. 3 weeks. Relaxed motorcycle riding (no offroad) over great passes and curves, as well as scenic and historically interesting points are the focus. Preferably you are riding yourself, but being a pillion passenger is also possible.