The St. Regis Spa

The St. Regis Spa sits inside the St. Regis hotel on the Chicago River in the Loop, built around a 12,000-square-foot wellness floor set high above the city. The space combines treatment rooms with a pool, rooftop access, a fitness center and yoga/movement classes, so a visit can be as simple as a facial or stretch into a half-day of swimming, a workout class and a treatment.

Treatments use French Sothys products, and the design moves from a marble, art deco-inspired lobby into softer, cream-toned lounge areas. The spa markets itself as Chicago's only Forbes Travel Guide Five-Star spa and references the Iridium Room at the original St. Regis New York as a design touchstone, though that's a brand story rather than something to verify on site.

Access is by day pass, and the spa is set up for both solo visits and couples, with group fitness classes (cardio, strength, flexibility, meditation) running alongside standard spa services. There's also a private membership option through The St. Regis Spa & Athletic Club for people who want recurring access rather than one-off visits.

It's priced at the top tier (luxury), consistent with a five-star hotel spa in downtown Chicago. Hours run 8am to 8pm every day of the week, which gives decent flexibility for booking around a hotel stay or a day trip into the Loop. For current treatment menus, package pricing or membership details, it's worth checking directly with the spa, since specifics like per-service cost aren't published on the page.