From SFWiki

Orr Hot Springs

• • Website: http://www.andersonic.net/orr/
  • Location: 13 miles west of Ukiah on Orr's Hot Springs Rd.
  • Phone: (707) 462-6277
  • Description: Several covered soaking tubs, one large covered hot tub, one outdoor soaking pool. Swimming pool just outside the sauna door. Massages available. Community Kitchen (Great full restaurant-size & quality). Several cabins at reasonable rates. Dorm sleeping & camping at $15 a night. Please call ahead for reservations, no drop-ins allowed.
  • Key Points: Nude

Wilbur Hot Springs

• • Website: http://www.wilburhotsprings.com/
  • Location: Wilbur Springs, California 95987-9709
  • Phone: (530) 473-2306
  • Description: has been highly rated by many visitors. Clothing is optional in the bathing area (it is, however, required everywhere else on property).
  • Key Points:Nude

Harbin Hot Springs

• • Website: http://www.harbin.org/
  • Location: 18424 Harbin Springs Rd., P.O. Box 782, Middletown CA 95461.
  • Phone: (707) 987-2477.
  • Description: 1100 acres, naturally heated pools (clothing optional), cool swimming pool, sun decks, hotel, vegetarian/organic restaurant (clothing required), health food store, sauna, camping, hiking trails. Massages available, community kitchen, free movies at night. Various classes by advance reservation, including the famed Love, Intimacy, and Sexuality workshops produced by the Human Awareness Institute.
  • Key Points:Nude