Solage, Auberge Collection

Solage is a resort spa built into the Auberge Collection hotel of the same name on Silverado Trail North in Calistoga, in the heart of Napa Valley. The spa centers on a thermal pool, drawing on Calistoga's long association with hot-spring water, and sits within a property that also includes a restaurant or café and overnight accommodations.

Access is restricted to hotel guests, so this isn't a drop-in day-spa stop for outside visitors — a stay at Solage is the way in. The resort markets itself around longer stays, with published offers for extended bookings and advance reservations, suggesting a slower-paced, multi-day approach to using the spa and pool rather than a single treatment visit.

The spa is positioned as adults-only, which fits the quiet, wine-country retreat feel the property is going for. Beyond the thermal pool, the site references a separate baths and spa area alongside the main pool, and guests have mentioned being able to spend a full day on-site without leaving, with the small town of Calistoga a short walk away for anyone who wants to head into town.

This is a luxury-tier property, and pricing for spa access itself isn't published separately — it's bundled into the cost of a room. Anyone specifically chasing Calistoga's famous hot springs should note that access here comes through booking a stay, not a standalone day pass, so checking with the resort directly on room rates and what the spa day entails is the practical first step before planning a visit.