300 E River St E, Ketchum, ID 83340

LATEST
bedrooms 4
bathrooms 5
|Apartment
NZD $20,854,875
USD $11,750,000
Published on: 07 Nov 2026
Last updated on: 08 Nov 2026
300 E River St E, Ketchum, ID 83340
300 E River St E, Ketchum, ID 83340
300 E River St E, Ketchum, ID 83340
+12
300 E River St E, Ketchum, ID 83340
  • 12
Property ID: 110121077106
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Residential, 1 Story, Ketchum, ID

300 E River St E, Ketchum, ID 83340
The Observatory Sun Valley, A Viceroy Resort, offers twelve single-level penthouse residences with sweeping mountain views, with only eight remaining. The only 4-bedroom residence remaining features 4 en suite baths plus a powder room, an approx. 900 SF partially covered terrace, and unobstructed views of Bald Mountain, the southern hills, Wood River Valley and Dollar Mountain. Adorning The Observatory Sun Valley, A Viceroy Resort, twelve single-level penthouse residences with sweeping views of Idaho's Rocky Mountains are coming to life. Only eight remain available. West wing, Highway 75 side, south and east views with full unobstructed views of Bald Mountain, the southern hills and down the Wood River Valley, and views east to Dollar Mountain. 3,480 saleable square feet. The only four-bedroom, 4 ensuite bath and powder room, remaining for purchase. This includes an approximate 900 square foot exterior terrace assigned exclusively as limited common area. The exterior terrace is partially covered as well by the exterior "butterfly" roof that extends to the south. Ownership of these singular residences includes highly personalized service and access to a full suite of amenities, from a spa and fitness center to thermal pools, meeting spaces, cafe, restaurant, bar, ski concierge, and a state of the art observatory conveniently located at the gateway to downtown Ketchum and just minutes from all the mountain adventures Sun Valley has to offer.

Property Details

Basic Info

Property Type
Apartment
Listing Status
Active
Building Size
323.30 m2
Year Built
2026
Rooms
4 bedroom(s), 5 bathroom(s)
Architecture Style
Contemporary
Num Floors
1
County
Blaine
Parcel ID
RPK00000830020
Provider
Sun Valley Board of Realtors
Brokerage Office Name
Keller Williams Sun Valley Southern Idaho
Brokerage Office Phone
(208) 622-7722
Neighbourhoods
Ketchum
Address
300 E River St E, Ketchum, ID 83340
Contact Agent
Burnett Properties
Keller Williams Sun Valley Southern Idaho
647 Filer Ave Suite 101, Twin Falls, ID 83301
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Burnett Properties
647 Filer Ave Suite 101, Twin Falls, ID 83301
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      Property ID: 110121077106

      Original Property ID: 3yd-SVBORID-26-335089
      Data provided by Sun Valley Board of Realtors, MLS #: 26-335089
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      Copyright © 2026 Sun Valley Board of Realtors. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.