The resort has six geothermal mineral pools. One is the main Resort Pool, open to families and served by Water Tower Bar. The other five belong to Fairmont Spa. That distinction is worth understanding before arrival: the spa is adults-only, and its access arrangements are separate from simply having a room at the hotel. A day-use fee may apply, depending on the arrangements booked.

Within the spa grounds, the outdoor pool and Jacuzzi sit beneath redwoods, with loungers, daybeds and cabanas nearby. The Watsu Pool has underwater sound, giving it a different atmosphere from the main swimming pool. Indoors, the Roman-style bathhouse contains two soaking pools. You can move between outdoor and indoor settings without leaving the spa, which makes the waters part of a longer visit rather than a brief dip after a treatment.

The spa has 28 treatment rooms. Its menu includes massages, facials and body treatments, as well as manicures, pedicures and hair services. Watsu aquatic bodywork is a more unusual option: a practitioner supports and guides you through movements in the warm mineral pool. For a treatment on dry land, the massage selection ranges from light-pressure sessions to deeper work. The spa team can help match an appointment to your preferences.

The bathhouse ritual follows a sequence of bathing, heat and cool showers. A grape-seed exfoliation begins the circuit, with a halotherapy sauna, mineral-water pools and aromatherapy steam room along the way. Rest areas provide somewhere to pause between stages. Follow the posted heat guidance and discuss any suitability concerns with the spa team. The bathing circuit can be arranged alongside a treatment or as a visit in its own right.

Fairmont Rooms occupy the Mission Building's second and third floors, with a king or queen bed and decor influenced by Provence. They suit a short stay centered on the grounds and nearby wineries. Deluxe Rooms offer king or two-queen configurations. A separate Deluxe Room with Fireplace category makes that feature an explicit part of the room choice, rather than something to expect in every bedroom.

For a family wanting a bedroom apart from the living area, the Fairmont One Bedroom Suite has a king bed, sofa bed and wet bar. It can connect to a Fairmont King Guestroom with an additional reservation. This creates a two-bedroom arrangement for a larger party, while retaining a shared place to sit. Confirm the connecting setup when booking, especially if keeping the family together is essential.

Mission Spa Suites have a 500-square-foot open-plan layout. A four-poster king bed, wood-burning fireplace and Jacuzzi tub designed for two make them especially relevant to couples spending time indoors as well as at the spa. The sitting area is part of the same open space, not a separate bedroom suite. Some accessible versions are available, with bathroom features varying by the particular room.

Vineyard Suites also measure 500 square feet. French doors bring light into the sitting area, which has a sofa bed and fireplace. Their patio or balcony looks over the resort gardens, and the bathroom pairs a soaking tub with a separate shower. Despite the category name, these are garden-view accommodations; you are staying at the resort, not in a detached cottage among vines.

The 600-square-foot Signature One Bedroom Suite separates sleeping and living areas. A fireplace and sofa bed occupy the living room, and each suite has a balcony or patio. A two-person Jacuzzi tub and separate shower retain the emphasis on bathing. For guests keeping different hours, the extra separation can be more valuable than choosing a larger open-plan room.

The Jack London Suite takes its name and decorative inspiration from the novelist associated with Sonoma. On the second floor, its 1,010 square feet include a private king bedroom with a fireplace, a living area with a sofa bed and wet bar, and an additional half bathroom. A private balcony faces the grounds. The layout leaves room for a family to gather without using the bedroom as the main sitting space.

Santé serves French-Mediterranean food shaped by Northern California ingredients. Its kitchen draws on local farms, foraged herbs and seafood, with plant-based dishes also represented. Breakfast and dinner give the restaurant two distinct roles in a stay, and terrace seating looks toward the pool. It is an opportunity to try the region's produce at the hotel, alongside meals in Sonoma itself.

In the historic lobby, 38° North Cocktail Bar & Lounge offers regional and international wines, cocktails and California-inspired bites. Water Tower Bar is the more casual poolside choice, with seasonal food, craft beers and wine beneath the resort's old water tower. Spa Café serves lighter fare within the wellness setting. In-room dining is another option when a day of touring ends with an evening by your own fireplace.

Hotel guests can arrange play at the members-only Sonoma Golf Club. The course covers rolling ground with mature oak trees and has 18 holes, par 72. The club also has tennis and pickleball, a golf shop and the Clubhouse Grill. Equipment rental, lessons and a shuttle from the hotel help make a round possible without bringing everything from home. Tee times should be arranged through the concierge rather than assumed to be available on arrival.

Back at the resort, the fitness center has treadmills, a rowing machine and free weights. The Movement Studio overlooks the Watsu Pool, with classes such as yoga, Pilates and stretching. Guided hikes offer another way to see Sonoma Valley's wooded landscapes. Ask about the program during your stay, as particular classes and outings follow their own schedules.

The Mission Kids' Lounge, beside the historic lobby, gives children aged six to 16 a place for movies, games and PlayStation 5. Lawn games include oversized chess, bocce and Connect Four. These are useful alternatives to swimming, especially for a family spending several nights here. The concierge can also suggest family-friendly wineries and local outings, so the trip need not revolve around adults' tasting appointments.

The address is 100 Boyes Boulevard. Sonoma County Airport in Santa Rosa is the closest of the principal airports listed by the hotel, at about 27 miles. San Francisco International and Oakland International are farther south, roughly 58 and 59 miles away respectively. Road conditions affect the journey, so allow time for traffic. The resort can arrange airport transfers and wine-tour transportation, keeping travel between tastings and the return to Boyes Hot Springs in the same plan.