A reservation-only social wellness sauna spa in Renton (serving the Seattle area) with a thermal pool, cold plunge, sauna and steam room, day passes from $75.
At a glance
- Price
- $
- Day pass
- $75
- Signature treatment
- Ultimate Body Renewal
- Adults only
- No
- Couples treatments
- No
- Walk-ins
- No
- Good for
- Family friendlyGroups
- Price
- Affordable
Soak & Sage is a day spa built around communal heat-and-cold circuits rather than solo treatments. The core setup is a thermal pool, cold plunge, sauna and steam room, meant to be worked in rotation — warm up, plunge, steam, repeat — in a shared, social setting rather than a silent spa atmosphere.
A two-hour day pass runs $75 on weekdays and $85 on weekends, giving access to the full thermal circuit. The spa is not adults-only and is marketed as family friendly and good for groups, including celebrations and large group bookings arranged by phone. Walk-ins aren't accepted, so a reservation is required before showing up.
Beyond the soaking circuit, the spa runs a menu of nine treatments spanning massage, facials, dermaplaning and microneedling. Its signature service, the Ultimate Body Renewal, is a 75-minute, $225 ritual combining a full-body scrub, a hydrating body wrap and a mini HydroPeptide facial. Memberships (Passport, Wanderlust, Tranquility Tribe) offer recurring monthly facility access for regulars.
Practical details are modest: parking is on the street, English is the language of service, and the facility is not clothing-optional. Hours shift through the week, running from 9am on weekends and Fridays to as late as 9pm on weeknights, with a later midday start on Tuesday through Thursday. The Seattle Times named it its 2025 Best in the PNW Day Spa.
Good to know
- Do I need a reservation, or can I walk in?
- A reservation is required; the spa does not accept walk-ins.
- How much is a day pass?
- A two-hour day pass is $75 on weekdays and $85 on weekends, covering access to the thermal pool, cold plunge, sauna and steam room.
- Is this spa adults-only or clothing-optional?
- No, it's family friendly and not clothing-optional.
- What's the signature treatment and how much does it cost?
- The Ultimate Body Renewal is a 75-minute body scrub, body wrap and mini facial priced at $225.
- Where do I park, and what languages are spoken?
- Parking is on the street, and service is offered in English.
Details checked October 2, 2026. Prices and hours change; confirm before you go.
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