Transcontinental
Good for you. You didn't say what part of CA, but when I got my first Mustang many years ago I drove NY (through Rochester, btw) to Seattle, then south through San Francisco, and back home the southern route. No matter what you're driving, or what road you take, sit back and think about how our pioneer forefathers crossed this continent at walking speed.
It's a hell of a country, and the people who founded it were giants.
I took my drive by myself, so I could stop where I wanted when I wanted. I, er, also did the NY to Seattle part non-stop. That may not work for everyone (...) Man, that was some trip...