We found 1 Reddit comments about Swimming Holes of California. Here are the top ones, ranked by their Reddit score.
Yeah I agree it's not the most ideal swimming hole, as far as Bay Area goes though it's one of the few that meets the criteria. I went once and took a small blow up float raft, but I won't be going again. I usually drive the few hours toward the Sierras if I really want to swim.
Here is a book you may be interested in: https://www.amazon.com/Swimming-Holes-California-Timothy-Joyce/dp/1490456872