The Ritz-Carlton Spa, Portland

The Ritz-Carlton Spa sits inside the Ritz-Carlton Portland, accessed through the hotel's parking lot entrance at 900 SW Washington St. It's a small operation by treatment count—six offerings total, including the signature Antara Body In Balance Ritual—but the wet areas are the draw for day visitors: an infinity pool styled after a hidden mountain lake, a whirlpool, eucalyptus steam rooms, dry saunas and a cold plunge experience shower.

Access is restricted to adults 18 and over, and the spa does not accept walk-ins, so a reservation is required before arrival. A day pass runs $50 and is open to the public, not just hotel guests. Couples can book a private suite together, and there's a separate relaxation lounge for downtime between treatments or pool sessions.

Hours run 8:30am to 7pm most days, shortening to 8:30am to 5pm on Mondays and Tuesdays. There's no split by gender for scheduling. Given the single couple's suite and limited treatment menu, this reads as a compact amenity space built around the pool and thermal circuit rather than a sprawling treatment-heavy destination—worth checking the Ritz-Carlton's own site for current treatment pricing and specific day-pass terms, since those details aren't listed here.