The above is via A Well Travelled Woman. The following is from http://www.savestateparks.org/index.html.
At most state parks, day use fees are charged for parking only. There are also state parks where park users pay a per person fee for tours. At some park units, budget cuts have eliminated staffing at fee collection kiosks, so fees are collected on the “honor system”.
If you use state parks regularly, consider purchasing an annual pass. The Department of Parks and Recreation offers several different types of annual passes that provide you with unlimited access to state parks. The California State Parks Foundation also offers both annual passes and day use passes as benefits of membership. Memberships start at just $40. (Learn more)
Be sure to let your friends and family know about the memorable experiences you have at state parks and encourage them to plan a visit themselves!