You should definitely check out Yosemite, Lee Vining (
http://en.wikipedia.org/wiki/Lee_Vining,_California), (from this area you can visit Bodie, a ghost town -
http://bodie.com/), Mono Lake, Hwy 1 (Coastal Route), possibly Sequoia/Kings National Parks, if you are into that type of stuff. California is huge, there is so much to see in this state and nice places to ride.