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 senior 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.
New
$5,250,000
120 Keystone Rd, Ketchum, ID 83340
--beds
--baths
52Acres
Build to Suit Residential, Unimproved Land
Built in ----
52 Acres Lot
$-- Zestimate®
$--/sqft
$-- HOA
What's special
- 1 day |
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Zillow last checked: 7 hours ago
Listing updated: March 23, 2026 at 10:48am
Listed by:
James Tautkus 208-734-1288,
Keller Williams Sun Valley Southern Idaho
Source: IMLS,MLS#: 98979014
Facts & features
Interior
Features
- Has basement: No
Video & virtual tour
Property
Features
- Fencing: Fence/Livestock
- Has view: Yes
- On waterfront: Yes
- Waterfront features: Pond/Stream/Creek
Lot
- Size: 52 Acres
- Features: Over 40 Acres, Pasture, Sloped, Views, Wooded, Borders Public Owned Land
Details
- Additional parcels included: RP1M0000000760
- Parcel number: RP1M0000000750
- Zoning: BC/R-10 (UIB)
Utilities & green energy
- Electric: Installed
- Sewer: Septic Tank
- Water: Well, Geothermal
- Utilities for property: Propane, Phone Connected, Electricity Connected, Sewer Connected, Underground Utilities
Community & HOA
Community
- Subdivision: Elkhorn Sub
Location
- Region: Ketchum
Financial & listing details
- Annual tax amount: $1,206
- Date on market: 3/23/2026
- Listing terms: Cash,1031 Exchange,Owner Will Carry
- Ownership: Fee Simple
- Electric utility on property: Yes
- Road surface type: Dirt, Gravel, Paved
Estimated market value
Not available
Estimated sales range
Not available
Not available
Price history
Price history
Price history is unavailable.
Public tax history
Public tax history
Tax history is unavailable.BuyAbility℠ payment
Estimated monthly payment
All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.
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Neighborhood: 83340
Nearby schools
GreatSchools rating
- 7/10Ernest Hemingway Elementary SchoolGrades: PK-8Distance: 3.3 mi
- 5/10Wood River High SchoolGrades: 9-12Distance: 11.1 mi
- 4/10Wood River Middle SchoolGrades: 6-8Distance: 10.3 mi
Local experts in 83340
- Idaho
- Blaine County
- Sun Valley
- 83340
- 120 Keystone Rd
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