120 Keystone St
Sun Valley, ID 83353
52Acres(Lot)
Discover 120 Keystone St, a premier 52-acre legacy estate for sale in the exclusive Elkhorn area of Sun Valley, Idaho. Positioned just minutes from downtown Ketchum and the Sun Valley Resort, this rare dual-parcel landholding--comprising 18.6 and 33.5 acres--offers an unparalleled opportunity for a private equestrian compound or a boutique luxury residential development. Bordering U.S. Forest Service land, the property provides direct, private canyon access for horseback riding, hiking, and outdoor recreation right from your back door. Appraised at $10.5M, this Sun Valley real estate asset combines pristine natural amenities with exceptional utility. The land is anchored by senior 1883 water rights for irrigation and stock, a high-yield well, and a serene pond with on-site geothermal pote
Property Details
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Map
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Features
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Lot Information
Main Square Feet: 52 Acres Lot Size Acres: 52 Lot Size Square Feet: 2265120Property Information
Subdivision: Other Source Property Type: Land MLS Area Minor: Elkhorn in Sun Valley Property SubType: Single Family Residence
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Listing Price Information
Listing Price: $4900000 Original Price: $5250000 1031 Exchange, Cash, Owner Will Carry
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Tax Information
Parcel Number: RP1M0000000750 Tax Year: 2025 Annual Tax: $1206.84 Tax Legal Desc: Elkhorn 46, Keystone 41 A, Carbon Hill 74 A, SEC 15 4N 18E
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Utility Information
Underground Utilities -
Location Information
Direction: Located at the gated, private terminus of Keystone Street within the exclusive Elkhorn community of Sun Valley, Idaho. WaterSource: Well, Private
How much is this property worth?
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Nearby Home Value
| Address | Estimate | Bed | Bath | Sq. Ft | Lot Size |
|---|---|---|---|---|---|
| 232 Blue Bell, Sun Valley, ID, 83353 | $2,200,000 | -- | -- | -- | 8.03 Acres(Lot) |
| 525 Juniper Rd, Sun Valley, ID, 83353 | $1,450,000 | -- | -- | -- | 1.94 Acres(Lot) |
| 232 Elkhorn Rd, Sun Valley, ID, 83353 | $1,495,000 | -- | -- | -- | 0.57 Acre(Lot) |
| 114 Highlands Dr, Sun Valley, ID, 83353 | $2,195,000 | -- | -- | -- | 0.76 Acre(Lot) |
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The data relating to real estate for sale on this website comes in part from the Internet Data exchange (IDX) program of the Sun Valley Board of REALTORS®. IDX information is provided exclusively for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Real estate listings held by brokerage firms other than ByOwner, are indicated by detailed information about them such as the name of the listing firms. Information deemed reliable but not guaranteed. Copyright ©2026 Sun Valley Board of REALTORS®. All Rights Reserved.
ByOwner last updated this listing 09/08/2026 @ 00:43
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