Sequoia and Kings Canyon are worth a good look. Also within a days drive is Yosemite National Park. There are a few stops on the way to Yosemite. I would recommend, Lewis Creek, and Nelder Grove. Many people stay in Fresno and do King's Canyon Sequoia as a day trip. Just depends on the amount of time you want to spend there. For Yosemite they usually stay in the Oakhurst area. There are some shady areas in Fresno so watch where you stay.
Monterey Bay is well worth the trip, The aquarium is one of the best in the world. San Francisco has an endless amount to do.