[Retric]

Even ignoring traffic, you are counting the same park multiple times. Kings Canyon, Sequoia, Yosemite, Lassen Volcanic, Pinnacles is not bad but it's not 8.

https://en.wikipedia.org/wiki/File:NationalParks.forwiki.pdf

https://en.wikipedia.org/wiki/List_of_national_parks_of_the_...

But, Muir Woods is part of Golden Gate National Recreation Area and Point Reyes are not separate parks.

[pwarner]

Two more national monuments I did not know about. Not parks. Was fun to see what's near by.

http://www.blm.gov/ca/st/en/prog/nlcs/California_Coastal_NM....

http://www.fs.fed.us/visit/berryessa-snow-mountain-national-...

[dekhn]

Don't forget Henry Coe State Park.