Hello and welcome to the RTA forums !

Well you wouldn't go far wrong with a trip up the PCH to San Fran and taking a little time out in Yosemite valley and Sequoia NP before heading home. There are many more options such as heading further up the Coast to the Redwoods, Napa valley and Gold country might be of interest.

Have a look at the map and search the forums and road trip planning pages for inspiration and when you have found what you are looking for we might be able to help "fine tune" your trip.