Wife had actually opened the book and got past the front cover.
These two inside are captioned "Long Beach, c. 1970", but I agree with Al, would seem to be a couple of years later.

Top one looks like the same photo.
Unless that person with the sun umbrella went there a lot.
I went down at the north end of the beach today - certainly wasn't venturing far in the 2wd Kombi with no one around.

Maybe people were braver in the olden days....