About 120 Keystone
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.
Features of 120 Keystone
| MLS® # | 98979014 |
|---|---|
| Price | $5,250,000 |
| Acres | 52.00 |
| Type | Land |
| Sub-Type | Build to Suit Residential |
| Status | Active |
Community Information
| Address | 120 Keystone |
|---|---|
| Area | Blaine-Custer County - 1525 |
| Subdivision | Elkhorn Sub |
| City | Sun Valley |
| County | Blaine |
| State | ID |
| Zip Code | 83353 |
Amenities
| Utilities | Propane, Phone Connected, Electricity Connected, Sewer Connected, Underground Utilities |
|---|---|
| Is Waterfront | Yes |
| Waterfront | Pond/Stream/Creek |
| Has Pool | No |
Interior
| Fireplace | No |
|---|
Exterior
| Lot Description | Over 40 Acres, Pasture, Sloped, Views, Wooded, Borders Public Owned Land |
|---|
Additional Information
| Date Listed | March 23rd, 2026 |
|---|---|
| Days on Market | 77 |
| Zoning | BC/R-10 (UIB) |
| Foreclosure | No |
| Short Sale | No |
| RE / Bank Owned | No |
Listing Details
| Office | Keller Williams Sun Valley Southern Idaho |
|---|---|
| Contact Info | telleriasl@gmail.com |