I just wanted to add for anyone in SD... I rode Julian yesterday on the bike and that road is fantastic. I still have to hit Palomar as I've heard that it's even better, but Julian was a good mix of large, high-speed sweepers and then tight back-to-back-to-back hairpins. The views were great too.
Take the 78 East from Julian and you've got a nice stretch of curvy roads. I always managed to find traffic, but if you can get around a car or two, you'll be fine.