WELLNESS

A sanctuary of renewal

Reconnect and restore at our sanctuary of holistic wellness and advanced therapies, set against the breathtaking wilderness of Montana.

Please note that the indoor lap pool, outdoor cold plunge and outdoor onsen will be closed 16-19 November 2026 for maintenance

Opening Hours

Wellness Facilities:

8am – 5pm

Spa services: 9.30am – 5pm

Fitness Center

Open 24 hours via key access, available to all resort guests.

Personal belongings may be left in the designated storage area within the Fitness Center.

Facility Features

Separate men’s and women’s steam rooms and saunas

Co-ed amenities, including a lap pool, outdoor onsen, and outdoor cold plunge

Facility Access

Resort guests are warmly invited to enjoy our spa facilities, including the steam room, sauna, lap pool, outdoor onsen and cold plunge. Guests visiting without a scheduled treatment are encouraged to arrive in their in-room robe and leave valuables securely in their room.

Spa lockers are reserved for guests with scheduled treatments and cannot be guaranteed for general use.

Age Requirement

Guests must be 16 years of age or older to access the wellness facilities.

Contact Us

Email: spa.moonlightbasin@oneandonlyresorts.com

Phone: +1-406-993-3441

Text: +1-406-500-9240

One&Only Spa

Revitalizing Alpine Wellness

Embrace complete restoration across eight treatment rooms, a sauna, steam room, indoor pool open to fresh mountain air, beauty lounge and tennis court.

Wellness reimagined

Signature Rituals

Explore immersive rituals crafted to restore, recover and renew, each one a deeply personal journey for body and mind.

Glacial Renewal Ritual

A revitalizing full-body ritual inspired by the alpine landscape. Exfoliation, a warm herbal clay wrap, cooling elements, and customized massage work together to restore balance and leave the body refreshed, grounded, and renewed.

Recovery Ritual

A deeply restorative ritual combining purposeful bodywork, restorative botanicals, and therapeutic techniques to ease muscular fatigue, calm the nervous system, and leave the body renewed and deeply relaxed.

Sleep Ritual

A serene full-body ritual combining warming therapies, grounding aromatherapy, soothing scalp massage, and restorative touch to quiet the nervous system and encourage deep, restful sleep.

HOT & COLD RITUALS

Contrast therapy

From steam room and dry sauna to cold plunge, heated onsen and lap pool, our mountain-inspired contrast therapies awaken the senses and deeply restore.

Rituals

Bespoke Facials

Discover the latest skincare treatments from the world’s leading beauty experts, each tailored to your needs.

Longevity Rejuvenation Facial

A next-generation treatment designed to restore firmness, volume, and overall skin vitality. Combining regenerative skincare with innovative technologies, this facial supports cellular renewal while enhancing tone, texture, and resilience.

90 minutes

The Contour Facial

A sculpting facial designed to visibly lift, firm, and redefine facial contours through regenerative skincare, precision techniques, and thoughtfully selected technologies. The complexion appears smoother, more luminous, and naturally rejuvenated.

Skin Ritual

A personalized, results-driven facial combining advanced techniques with high-performance skincare from Epicutis, Lucrece, Ourself, or Skin Authority to address your skin’s unique needs and reveal a balanced, refined, radiant complexion.

The Anderson Method

A highly customized facial combining advanced technology, targeted modalities, and high-performance actives to refine texture, restore hydration, and reveal clearer, smoother, more radiant skin.

Longevity Rejuvenating Facial

The Contour Facial

Skin Ritual

The Anderson Method

AUTEUR skincare serums arranged on a white surface at One&Only Moonlight Basin

Longevity Rejuvenating Facial

The Contour Facial

Skin Ritual

The Anderson Method

AUTEUR skincare serums arranged on a white surface at One&Only Moonlight Basin

Longevity Rejuvenation Facial

A next-generation treatment designed to restore firmness, volume, and overall skin vitality. Combining regenerative skincare with innovative technologies, this facial supports cellular renewal while enhancing tone, texture, and resilience.

90 minutes

The Contour Facial

A sculpting facial designed to visibly lift, firm, and redefine facial contours through regenerative skincare, precision techniques, and thoughtfully selected technologies. The complexion appears smoother, more luminous, and naturally rejuvenated.

Skin Ritual

A personalized, results-driven facial combining advanced techniques with high-performance skincare from Epicutis, Lucrece, Ourself, or Skin Authority to address your skin’s unique needs and reveal a balanced, refined, radiant complexion.

The Anderson Method

A highly customized facial combining advanced technology, targeted modalities, and high-performance actives to refine texture, restore hydration, and reveal clearer, smoother, more radiant skin.

ALPINE RENEWAL

Rejuvenating fitness

Framing panoramic alpine views, our Fitness Studio is a haven for elevated wellbeing, featuring Technogym equipment, a weights room and functional fitness areas.