Yampah Spa & Vapor Caves

Yampah Spa & Vapor Caves occupies a building that has operated continuously since 1893, built over what's described as the only natural vapor cave in North America. Geothermal water flows at 125°F through three rock chambers, producing steam around 110–112°F that visitors breathe in while seated on marble benches; the vapor carries 34 minerals including sulfate, lithium, zinc and potassium. The site has a long history with the Ute, who are credited with building the original sweat cave and treating the springs as a place for ceremony and healing.

Beyond the caves, the spa runs a full menu of six treatments: massages from 25 to 110 minutes with optional heated stones or aromatherapy, body wraps using seaweed or ayurvedic mud, body scrubs, and private mineral baths in Japanese-style soaking tubs sized for two. The signature offering is the Body Detox, a two-hour, four-step sequence that moves guests through a 30-minute vapor cave session, a 30-minute private mineral bath soak, a flannel-wrap cooldown, and a finishing application of herbal cleansing oil; it's priced at $165.

Practically, the spa is open daily from 9am to 9pm and takes reservations rather than walk-ins. Day passes are available for those who just want cave access, and couples treatments can be booked alongside the two-person soaking tubs. The minimum age is 13, and on-site facilities include locker rooms and showers. It's billed as the only full-service spa and salon in Glenwood Springs.