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sun valley
Opening Fall 2026

Step off the beaten path and discover an escape where moments of exhilaration and ease are in harmonious balance. The Observatory Sun Valley, A Viceroy Resort, is your sophisticated home base for one of the country’s most storied year-round mountain destinations, where each day and night is deeply attuned to the rhythms of Sun Valley and the stars above.

The Observatory

Set within the Central Idaho Dark Sky Reserve, a professional-grade telescope atop the resort offers an unparalleled window into the cosmos. Guided by our resident astrophotographer, guests are invited to experience the night sky through both lens and story—with a professional-grade telescope, where celestial observation becomes art. Captured in real time, these moments are broadcast throughout the property, immersing the space in the quiet brilliance of starlight.

The Observatory Sun Valley, A Viceroy Resort
wellness

Wellness

The Big Wood River and high alpine meadows set a tranquil backdrop for recovery and rejuvenation in the expansive 5,000 sq ft spa at The Observatory Sun Valley. Let expert therapists, a thoughtful service menu, and beautifully-designed facilities including thermal pool, cold plunge, and steam room soothe muscles, restore energy, and reinvigorate both body and mind.

The Observatory Sun Valley, A Viceroy Resort

Gathering & Events

Idaho’s Sawtooth Mountains provide an inspiring backdrop for meetings, gatherings, and events in Ketchum. Designed to reflect the beauty of the Wood River Valley and the welcoming hospitality of the region, each space is imbued with natural elements and features elevated amenities along with professional planning to craft an unforgettable experience for guests and attendees.

wedding

Weddings

Say your vows under the expansive skies of Sun Valley and commit to a love as enduring as the stars above. From an intimate ceremony or elopement to a grand soirée, each moment of your celebration is crafted with the utmost care and framed by the striking beauty of the Sawtooth Mountains. 

A Historic Locale

Arrive at the gateway of world-class outdoor recreation, the charm of Ketchum, and vibrant arts and culture offerings that each invite you to slow down, breathe deeply, and embrace the mountain lifestyle.

The Observatory Sun Valley, A Viceroy Resort