The Spa at Casa Mani Resort Napa Valley

The Spa at Casa Mani Resort sits on the first floor of the Casa Mani Hotel in Napa Valley, built around a social thermal circuit rather than a solo soak. The co-ed setup pairs a sauna, steam room and cold shower, meant to be used before or after a treatment, and bathing suits are required throughout. Guests booking a massage or facial get one complimentary hour in the circuit ahead of their service, with extra time available to purchase if the schedule allows.

Treatments lean toward massage and botanical body, skin and facial work, with packages that bundle a massage and circuit time, including a side-by-side option for couples that comes with a take-home wellness item. Facilities include treatment rooms, a relaxation lounge, private locker rooms and a small retail boutique. The space is adults-only, with a minimum age of 18 for both services and the thermal circuit, and phones and recording devices are not permitted inside.

Day passes for the thermal circuit are open to non-spa guests when availability allows, though walk-ins aren't accepted, so reservations matter. Non-hotel spa guests get up to three hours of complimentary valet parking. A credit card is required to hold any booking, and cancellations need at least 12 hours' notice to avoid being charged for the full treatment. Pricing is dynamic rather than fixed, so it's worth checking current rates directly before booking, and a 20% service charge is added to treatments on top of whatever the quoted price turns out to be.