Try and ride thru Death Valley. Unbelievable scenery and even tho there are posted speed limit's ..well.. lets just say there there are not many bogies there..
Joshua Tree is great too.
Angeles Crest Hwy is a must do but snow at the higher elevations will stop you at Newcombs Ranch or sooner..
Anywhere on PCH is awesome ... Malibu Canyons and of course the "Snake" if you really want to get a knee down..