Just put up for sale another ref pack, this time of California! Find it here: https://www.artstation.com/a/3870033
You'll find a variety of my personal ref here that covers a large swat of California, from Los Angeles to San Francisco and its surrounding areas. Yosemite National Park, Joshua Tree National Park, Malibu Canyons, you name it! Although not as nature-dense as the Pacific Northwest, California is just a beautiful in its own right and certainly more diverse!
Any questions, just holler :).