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Expansive, sun-drenched pastures with Bald Mountain as your backdrop, the ultimate Sun Valley equestrian setting.
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Unobstructed, panoramic views of the iconic Bald Mountain bowls from your private 52-acre ridge.
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A rare 52-acre offering across two separate, deeded parcels, providing unmatched privacy and versatile development or family compound potential.
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A signature on-site pond creates a dramatic sense of arrival, providing a natural acoustic buffer for this private Sun Valley estate, while documented geothermal potential offers a unique, sustainable amenity.
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Enjoy immediate visual trail reports for Sun Valley’s Bald Mountain. 120 Keystone St offers an unobstructed vantage point of the world-class ski runs and weather conditions right from your property.
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Expansive, sun-drenched pastures with Bald Mountain as your backdrop, the ultimate Sun Valley equestrian setting.
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Captivating up-valley views showcasing the rugged beauty and pristine wilderness of Central Idaho.
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Dual-parcel configuration at 120 Keystone, offering significant land-use flexibility bordering Forest Service land.
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Preliminary analysis identifies a premier conceptual building envelope on the 18.6-acre front parcel, strategically positioned to maximize panoramic Bald Mountain views and natural solar orientation.
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A secluded ground-level view showcasing the private, manicured grounds and sprawling front acreage of this Sun Valley legacy estate at 120 Keystone St.
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The property’s private gated driveway is a scenic masterwork, offering immediate immersion into the Sun Valley backcountry and establishing 120 Keystone St as a true legacy retreat.
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Preliminary analysis identifies a premier conceptual building envelope on the 18.6-acre front parcel, strategically positioned to maximize panoramic Bald Mountain views and natural solar orientation.
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Preliminary analysis suggests a strategic opportunity to consolidate the 33.5-acre back parcel with the front acreage through a potential U.S. Forest Service (USFS) land swap, creating a more contiguous 50+ acre Sun Valley estate.
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Secure, gated entry ensures total privacy for this premier 52-acre Sun Valley estate, offering a rare sanctuary bordering U.S. Forest Service land.
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Preliminary analysis suggests a strategic opportunity to consolidate the 33.5-acre back parcel with the front acreage through a potential U.S. Forest Service (USFS) land swap, creating a more contiguous 50+ acre Sun Valley estate.
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Preliminary analysis suggests a strategic opportunity to consolidate the 33.5-acre back parcel with the front acreage through a potential U.S. Forest Service (USFS) land swap, creating a more contiguous 50+ acre Sun Valley estate.
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Preliminary analysis suggests a strategic opportunity to consolidate the 33.5-acre back parcel with the front acreage through a potential U.S. Forest Service (USFS) land swap, creating a more contiguous 50+ acre Sun Valley estate.
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Preliminary site analysis identifies a premier conceptual building envelope on the 33.5-acre back parcel, positioned to maximize panoramic Bald Mountain views and natural topography.
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Preliminary site analysis identifies a premier conceptual building envelope on the 33.5-acre back parcel, positioned to maximize panoramic Bald Mountain views and natural topography.
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Secure, gated entry ensures total privacy for this premier 52-acre Sun Valley estate, offering a rare sanctuary bordering U.S. Forest Service land.
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The property’s private gated driveway is a scenic masterwork, offering immediate immersion into the Sun Valley backcountry and establishing 120 Keystone St as a true legacy retreat.
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A signature year-round pond, fed by senior 1883 water rights, creates a stunning sense of arrival as you enter the private gated drive of this 52-acre Sun Valley estate.
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The property’s private gated driveway is a scenic masterwork, offering immediate immersion into the Sun Valley backcountry and establishing 120 Keystone St as a true legacy retreat.
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A signature year-round pond, fed by senior 1883 water rights, creates a stunning sense of arrival as you enter the private gated drive of this 52-acre Sun Valley estate.
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A rare legacy estate featuring senior 1883 water rights and on-site geothermal potential, offering a unique sustainable energy opportunity in the Sun Valley market.
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Springtime at 120 Keystone: 52 acres of vibrant, emerald-green hillsides and pristine mountain air, offering a truly 'private park' experience.
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A rare legacy estate featuring senior 1883 water rights and on-site geothermal potential, offering a unique sustainable energy opportunity in the Sun Valley market.
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Experience the seasonal 'green-up' of the Wood River Valley from your private ridge; a rare look at the estate's verdant landscape and geothermal-fed vitality.
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A private gated entrance serves as an exclusive trailhead into Keystone Gulch, providing direct backcountry access to the summit of Johnstone Peak and the surrounding wilderness.
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Nestled within Sun Valley’s exclusive Elkhorn neighborhood, 120 Keystone St offers a secluded mountain retreat with a private trailhead providing direct access to the Sawtooth National Forest backcountry.
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A private gated entrance serves as an exclusive trailhead into Keystone Gulch, providing direct backcountry access to the summit of Johnstone Peak and the surrounding wilderness.
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The 33.5-acre back parcel offers a strategic USFS land swap opportunity. By exchanging hillside acreage for contiguous valley floor space, an owner can significantly expand the building envelope and maximize development density at 120 Keystone St.
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Stunning Bald Mountain Views Near Sun Valley Resort Skiing.
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Privacy meets proximity at 120 Keystone St, a gated Sun Valley estate minutes from Ketchum, Bald Mountain skiing, and the best of South Central Idaho's mountain lifestyle.
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Utilities on site and identified locations.
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Detailed boundary overlay via Land.id illustrating the two deeded parcels, topography, and the seamless border with Forest Service land.
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Detailed boundary overlay via Land.id illustrating the two deeded parcels, topography, and the seamless border with Forest Service land.
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Proposed Forest Service Land Swap application.
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Breathtaking fall vistas overlooking the valley; a prime season to enjoy the local wildlife and the crisp mountain air from your private ridge.
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Breathtaking fall vistas overlooking the valley; a prime season to enjoy the local wildlife and the crisp mountain air from your private ridge.
Property Description
Sun Valley Legacy Estate & Development Masterpiece. Discover the pinnacle of mountain living at 120 Keystone St, a premier 52-acre legacy estate in the exclusive Elkhorn area of Sun Valley, Idaho. This rare dual-parcel landholding (18.6 & 33.5 acres) offers a breathtaking canvas for a private horse property or a high-end boutique residential development. The Ultimate Equestrian & Outdoor Retreat: Bordering U.S. Forest Service land, the estate provides unparalleled private canyon access for horseback riding and hiking. Secure your legacy with 1883 water rights (irrigation/stock) and a high-yield well. The property features a serene pond with on-site geothermal potential, creating a year-round alpine oasis for wildlife and residents alike. Developer Upside & Infrastructure: Zoned BC/R-10 with patented mining claims, the land is ready for a luxury compound or multi-homesite project. Utilities (well, septic, buried power) are already installed. Significant val Search address on YouTube for video tours.
Address Map
- Country:
- US
- State:
- ID
- County:
- Blaine
- City:
- Sun Valley
- Zipcode:
- 83353
- Street:
- 120 Keystone
- Longitude:
- W115° 41' 35.9''
- Latitude:
- N43° 40' 36.7''
Additional Details
- Status:
- Active
- Type:
- Build to Suit Residential
- Tax Year:
- 2025
- Taxes:
- $1,207
- Potential Short Sale:
- No
- Auction:
- No
- Flood Ins Required:
- No
- In Foreclosure:
- No
- Land Size:
- Over 40 Acres
- Irrigation District:
- Big Wood
- Manu Homes Allowed:
- Yes
- Foundation Required:
- Yes
- Video Tour:
- https://youtu.be/dt4Q_1tvgq4?si=NGYdCyxonsAfk0R3
- Electric:
- Installed
- Gas:
- Propane
- Water:
- Individual well, Geothermal
- Waste Disposal System:
- Septic-exist
- Land Use:
- 2-4 units, Farm & Ranch
Land For Sale
120 Keystone, Sun Valley, Idaho 83353
52 Acres
Visits : 167 in 148 days
$4,900,000
Listing ID #98979014
Basic Details
- Property Type :
- Land
- Listing Type :
- For Sale
- Status :
- Active
- Listing ID :
- 98979014
- Price :
- $4,900,000
- Lot Area :
- 52 Acres
- Days on Market :
- 143
- Subdivision :
- Elkhorn Sub
- Update Date :
- 08/12/2026 22:47:19
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