Willow Stream Spa

Welcome to Relaxation

Willow Stream Spa at Fairmont Sonoma Mission Inn is now fully re-opened, offering our most popular 60-minute Spa experiences and Salon services in private indoor treatment areas.

Geo-thermal mineral pools at Wine Country’s premier destination resort spa offer relaxation and rejuvenation (for both registered resort guests and for day spa access) daily from 9am - 6pm. The Sonoma Store as well as the Spa Café will be open during regular pool hours.

Willow Stream Spa’s enviable location atop an ancient thermal mineral spring makes this a spectacularly unique wellness facility that boasts 3 outdoor thermal mineral pools ranging from 92 to 102 degrees.  The Roman style bathhouse is home to the famed Bathing Ritual where guests are encouraged to “Take the Waters” for health and vigor. This includes two further soaking pools as well as a Halotherapy Sauna and an Aromatherapy Steam Room.

Historically revered by Native Americans for its healing power, the ancient thermal mineral spring, flowing from 1,100 feet (335 meters) below the resort contains 27 different minerals and arrives at the surface at 130 degrees. Outdoor terrace seating is reserved for spa service guests as well as those utilizing day access.

Bathhouse Access

The Bathhouse, Bathing Ritual and Locker Rooms have re-opened.

Outdoor Geothermal Pool Access

All of the swimming pools on the resort are geothermal pools and offer the following temperature for your enjoyment. 

Spa Pool - 92 degrees
Watsu Pool - 98 degrees

Resort Guests: $49 daily charge/person

Non-Resort Guests$99 daily charge/person.  

This fee is waived for non-hotel guests scheduling a Spa treatment Monday - Thursday (excluding holidays; based on availability; blackout dates may apply) which must meet the minimum service value of $189. Advanced reservations are required.  Weekend services hold a Spa access charge of $59 additional to the service price; this will be added at check out.

Treatment values for non-hotel guests: Monday - Thursday $189

Health Matters

Please inform us of any health conditions at the time of booking. 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 48 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

Willow Stream 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 slippers for the day.  If you wish to arrive in the robe from your guest room, you are welcome to do so. 

Our therapists are highly trained in draping procedures to ensure your complete privacy. For your comfort, undergarments may be worn during treatments if you prefer. Swim suits are required in all public areas of the spa.

Taxes and Service Charges

For your convenience, a 20% service charge will be added to your spa bill. This is a gratuity for your provider. Gratuities for exceptional service can be added to your bill, upon checkout. 

Rates are subject to change. Occasionally, not all services may be available.

Willow Stream Spa

Summer Spa Services Menu

To safely accommodate and care for our guests and colleagues, we offer a curated menu of our most requested and effective services.  Each session is 60 minutes in length to allow for full sanitization between guests.


Rescue & Release Deep Tissue Massage - FIRM PRESSURE

60 minutes from $209

Whether you are suffering from an injury or deep-seated tension, this massage will alleviate muscle and joint pain, as well as stress. Specialized techniques focus on specific areas of concern and ease common discomforts, such as a stiff neck, lower back pain, and sore, tight shoulders.

Stress Recovery Massage - MEDIUM PRESSURE

60 minutes from $199

This medium-pressure full-body massage improves energy levels, promotes restful sleep, and melts away muscle tension. A jade and infrared heating pad plus essential oils infused with a powerful dose of magnesium leave you feeling completely rejuvenated.

Pure Relaxation Massage - LIGHT PRESSURE

60 minutes from $189

This essential massage is ideal for calming and relaxing both the mind and body. This technique uses long rhythmic movements and pressure point manipulation to reduce the heart rate and introduce peace and balance to a frantic, overworked, and exhausted nervous system. Perfect before a hectic work schedule.



Complete HydraFacial - 60 minutes from $245 

Technology meets luxury for this truly, results-driven facial. After purification, exfoliation, extraction, and hydration, your skin is thoroughly clean and quenched, with noticeably reduced lines and wrinkles.

Customized Corrective Facial – 60 minutes from $199

This facial is based on a multi-acid exfoliation of the face, neck, décolleté, and hands. Vitamin C essences address and correct specific aging concerns, including hyperpigmentation, fine lines, uneven texture, and premature aging. The treatment involves a deep cleansing massage and a hydrating mask that will leave the skin vibrant.

Vinoperfect Brightening Facial -   60 minutes from $199 

The ideal treatment for skin lacking radiance and luminosity. After the skin is gently cleansed, a bespoke massage with essential oils and small hot and cold rose quartz stones stimulates the skin’s radiance. The deep-action peeling mask awakens the luminosity of your complexion. Caudalie’s Vinoperfect collection adds the finishing touch to this treatment, leaving you looking rested and radiant.



Willow Stream Wellness Pedicure - 60 minutes from $125

Enjoy a relaxing, aromatic foot soak and a professional foot, nail, and cuticle grooming before a luxurious pressure-point massage to release tension.

Willow Stream Luxury Manicure - 60 minutes from $90

Restore tired, overworked hands with a soothing, fragrant soak and gentle grooming of the hands, fingernails, and cuticles. Includes an aromatic moisturizing hand massage and polish.


Cut and Blow-Dry – 60 Minutes from $119

Shampoo and Blow Dry – 60 Minutes from $105

Men’s Haircut – 45 Minutes from $69

Gift Cards

Fairmont Gift Cards

Fairmont Gift Cards can be purchased in person at the Front Desk, the Sonoma Store or electronically through the link below.


Purchase a Gift Card

Spa Facilities

Bathhouse Facility Includes:

Use of the signature Bathing Ritual, featuring exfoliating shower, two mineral water soaking pools, herbal steam, dry sauna, and cool down showers

Participation in all scheduled fitness classes

Use of the state-of-the-art fitness center and deluxe locker room facilities

Use of the bathhouse lounge and the outdoor spa loggia

Use of the outdoor thermal mineral pools and whirlpool


The Bathing Ritual is a self-guided all gender experience, bathing suits are required. The Bathing Ritual is beneficial on its own or in combination with any of our fabulous spa experiences and is included with spa access. Approximate time is 30-40 minutes.

Hours of Operation
Reservations please call (877) 289-7354

9:00am - 6:00pm Daily

10:00am - 6:00pm Daily

Hours subject to change without notice.



Open 24 hours for hotel guests
9:00am - 6:00pm daily – for day guests

We believe that health and wellness is a state of being, and we invite you to join our fitness instructors on the journey to wellness of mind and body. 

Hike Sonoma
Enjoy guided scenic walks and hikes to various locations throughout the picturesque Sonoma Valley. Hikes average from two to four miles (three to six kilometers), accommodating both novice and intermediate levels. Starting at 9am Friday, Saturday and Sunday. Meet at the entrance to the Lobby

Morning Stretch
Every Saturday and Sunday hotel guests can increase flexibility and reduce stress with our outdoor morning stretch class, suitable for all levels and ages. Meet on the front lawn.
Are you interested in scheduling a personalized session with a certified fitness instructor to help you maximize your workout, define new goals, or stay on track with your current program? 
Our fitness instructors can help you reach your fullest potential in a private one-to-one class. We also offer private instruction for up to 4 people. Additionally, we offer groups classes and instructions as well. 

Please view our full list of Group and Private Workout Offerings.

Discover other interests in Fairmont Sonoma Mission Inn & Spa

Fairmont Sonoma Mission Inn & Spa

The iconic AAA Four-Diamond Fairmont Sonoma Mission Inn & Spa provides an impeccable setting to relish the enviable Sonoma lifestyle.