This beloved clothing-optional resort re-opened in 2019 after a devastating 2015 wildfire swept through its 1,700 acres of meadows and forestland. At the heart of the revived complex is the pool area, with eight baths of varying temperatures, plus a sauna and sundeck offering sweeping valley views. Lodging is in creekside caravans or hilltop cottages. Budgeteers can also pitch a tent. Reserve in advance.
Day use (Mon-Thu adult/child $20/15, Fri-Sun $30/25) gives you up to six hours to explore the facilities and dine at the organic (and mostly vegetarian) Dancing Bear Cafe. At least one person in your party will have to become a member, which starts at $10 for a month.
Note that Harbin has a more youthful, no-frills vibe than the neighboring Mendocino hot springs. It's also much more hippie-dippie (don't be surprised when the bare-chested lady next to you starts groaning out mantras in the sauna!). Overnight visits feel a bit like going to adult summer camp with yoga classes, drum circles and nightly movies. If you're comfortable in the buff, it can be a revelatory experience.