I love to stop in Gaviota when I’m traveling between Southern and Northern California. The beach is located right where highway 101 curves inland to traverse the mountains after running parallel to the ocean for fifty miles.
There are some nice cliffs where you can sit and watch the waves and several trails that lead up into the mountains. It hasn’t been very crowded when I’ve visited because it’s too far from the major cities to attract crowds but there is a small campground at the park that seems to be popular with travelers. The atmosphere is restful and idyllic to me.