One of the oldest and most beautiful hot springs in California, Harbin Hot Springs is now operated as a non-profit retreat and workshop center. We are located north of San Francisco, above the Napa Valley wine region, near Middletown. Guests travel here from around the world to soak in the natural spring pools, sunbathe (clothing is optional), receive massages or Watsu, practice yoga, attend workshops, hike the hills, or to simply relax in the embrace of nature. If you have never visited our center, you owe it to yourself. If it has been a while since your last visit, welcome home.