Geothermal Hot Springs

Fairmont Spa is situated atop an ancient mineral hot spring, where wellness seekers have been drawn to Sonoma’s Boyes Hot Springs region for centuries. Rich in more than 27 naturally occurring minerals, these geothermal waters were shaped over millions of years by ancient volcanic activity and geological fault lines, creating an underground network that heats and mineralizes the water. The result is a distinctive source of mineral-rich springs steeped in history and celebrated for their restorative properties. The six pools at Fairmont Sonoma Mission Inn & Spa are filled with these naturally-derived waters, allowing guests to experience a truly unique wellness offering.

History of Boyes Hot Springs

Rooted in history and rich with story, Fairmont Sonoma Mission Inn & Spa stands on land cherished for centuries. Native American communities gathered here around the natural hot springs, drawn to their healing and spiritual qualities. In the 1840s, Dr. T.M. Leavenworth—a New York physician and Episcopalian minister—made his home here, naming the property “Agua Rica,” meaning "Rich Waters." Since then, these legendary waters have long attracted travelers seeking a restorative escape, where the natural beauty of Sonoma’s famed wine country meets the healing power of geothermal springs, offering an unparalleled experience of tranquility and rejuvenation. Discover more about the incredible history of these springs and about Fairmont Sonoma by clicking here.

What makes Fairmont Sonoma one of the best wellness resorts in Sonoma?

Fairmont Sonoma combines geothermal mineral waters, a dedicated spa, wellness treatments, fitness facilities, movement classes, pools and dining in one resort experience.

Spa Day Access

The Bathhouse, Bathing Ritual and Locker Rooms are open to resort guests and day guests. The Fitness Center & Movement Studio are open 24 hours for hotel guests and Members of Club 1927, and during regular spa hours for day guests. Outside food & beverage is not permitted inside the spa facilities. Spa Day Access is charged as follows:

• Resort Guests: $69 daily charge per person*
• Non-Resort Guests: From $99 – $199 per person*

*This fee is waived when scheduling Spa Services Monday – Thursday (excluding holidays, based on availability, blackout dates may apply) which must meet the minimum service value. Weekend services (Friday – Sunday) hold a Spa access charge of $59 for non-resort guests in addition to the service price; this will be added at check out. Advanced reservations are required.

Costs & Fees

• Treatment Pricing varies based on demand and peak periods. Selection of date may impact price. Pricing excludes gratuity for your provider.
• Rates are subject to change without notice. Occasionally, not all services may be available.

Outdoor Geothermal Pools

Fairmont Spa’s enviable location atop an ancient thermal mineral spring makes this a spectacularly unique destination, boasting naturally-heated geothermal mineral pools for year-round enjoyment.

Health Matters

• Please inform us of any health considerations at the time of booking.
• Guest who are pregnant must be past 12 weeks to partake in the services safe during pregnancy. Please notify us if you are pregnant or breast feeding.
• The consumption of alcohol before, during or directly after spa treatments is not recommended as the effects of alcohol will increase with the heat from the thermal water.
• You will be asked to complete a medical history form 24 hours prior to arrival so we can better customize your experience to your needs.

Spa Arrival and Etiquette

We recommend that you arrive 30 minutes before your first scheduled appointment to relax, familiarize yourself with the facilities, and experience our bathing ritual. Please note that all treatments end on time, regardless of start time. Please leave jewelry and other valuables in your room safe or the hotel safe.

Spa Environment

Fairmont Spa is an adult sanctuary. Guests must be 18 or older. For your peace and privacy, cell phones and other electronics are not encouraged. Please consider the sanctuary of our other guests if you take calls. No external music is permitted in the spa facility.

Spa Attire

• You will be guided to our locker room on arrival, where you will have the use of a robe and sandals for the day. If you wish to arrive in the robe from your guest room, you are welcome to do so. Extra-large robes and slippers are available on request.
• All guests are required to wear undergarments during their services at Fairmont Spa. Our therapists are highly trained in draping procedures to ensure your complete privacy.
• Swim suits are required in all public areas of the spa.

Cancellation Policy

Should you wish to cancel or reschedule your experience please notify the spa 24 hours in advance. Cancellation within 24 hour will be charged at 100% of the treatment cost unless we can re-sell the space. Group cancelations policies may differ.