Address
850 Fortress Road, Big Sky, MT
Price
$ 2,800,000
Property Attributes
- MLS#414590
- TypeSingle Family
- Listing Status Active
- CountyGallatin
- CityBig Sky
- AreaGreater Big Sky
- NeighborhoodPorcupine Park
- Zip59730
- Style
- Year Built2002
- Taxes$ 19380
- Price$ 2,800,000
- Bedrooms3
- Full Bathrooms3
- Half Bathrooms0
- Sqr Footage3875
- Lot Size12.844 Acres
Data Source:
Big Sky Country MLS (BSCMLS)
Property Description
There is a rare sense of peace and privacy at 850 Fortress Road. A long private drive leads to a home surrounded by mature Douglas fir and pine, open land, and the quiet sounds of nature. Despite being only minutes from Big Sky’s shopping, restaurants, and amenities, the property feels worlds away from the activity of the resort. Here, the pace slows and Montana’s natural beauty takes center stage. Privacy is one of the defining qualities of this property. Open space protects the land across from the home, preserving the expansive view and open landscape. The neighboring lot was also intentionally acquired by the owners and a neighbor to create an additional privacy buffer. The result is a peaceful setting with very little surrounding development and a true sense of seclusion. The front porch is the heart of the property, overlooking the landscape and providing a front-row seat to Montana’s seasons. Mornings bring coffee and wildlife—deer in summer and elk in winter. Evenings offer sunsets, the calls of sandhill cranes, and hawks overhead, while the firepit provides the perfect place to gather. It is not unusual to watch bull elk spar from the property, and spring brings calves to the nursery pasture across the road. The approximately 3,875-square-foot home is thoughtfully arranged across three levels, with three bedrooms and three bathrooms—one on each floor for exceptional privacy. The main level features a warm and inviting open living, dining, and kitchen area with views toward the Spanish Peaks, along with a sunroom opening to a spacious back deck. The upper level offers a loft office and private primary suite. The lower level includes a bedroom and bath, family room, second kitchen, sauna, wine room, storage, and large patio—ideal for guests, entertaining, or additional living space. A beautiful guest cottage provides a sleeping area, living area, bathroom, porch, and campfire area. Above the garage, a partially completed space offers the opportunity to create a bonus room. 850 Fortress Road does not simply offer proximity to Montana—it feels like Montana. Mature forest, abundant wildlife, protected open spaces, privacy, adventure, and authentic Western character combine with convenient access to Big Sky to create a setting that is increasingly difficult to find.
| Price History | |
|---|---|
| 9/4/2026 | Listed $2,800,000 |
General Features
| Sewer | Septic Tank |
|---|---|
| Heating | Propane,Radiant Floor |
| Cooling | Ceiling Fan(s) |
| Utilities | Electricity Available,Propane,Phone Available,Septic Available,Water Available |
| Roof | Asphalt,Shingle |
| Appliances | Dryer,Dishwasher,Range,Refrigerator,Washer |
| HOA Fee | 1500 |
| Garage Spaces | 2 |
| Association Fee Includes | Road Maintenance,Snow Removal |
| Patio/Porch Features | Covered,Deck,Patio |
| Architectural Style | Cabin |
| Security Features | Fire Sprinkler System,Heat Detector,Smoke Detector(s) |
| Construction Materials | Log,Shingle Siding,Shake Siding,Wood Siding |
| Year Built | 2002 |
| View | Meadow,Mountain(s),Trees/Woods |
| Stories Count | 2 |
| Levels | Two |
| Property Subtype | Single Family Residence |
| Tax Year | 2025 |
| Ownership | Full |
| Assoc Fee Paid Per | Annually |
| County | Gallatin |
| New Construction | false |
| Property Type | Residential |
| HOA | true |
| Attached Garage | false |
| Subdivision Name | Porcupine Park |
| Garage Y/N | true |
| Other Structures | Guest House,Stable(s) |
| Full Baths | 1 |
| Status | Active |
| Directions | Hwy 191 south past Big Sky, right on Windy Pass, right on Fortress Road. Property at top of the hill on the left. |
| ModificationTimestamp | 2026-09-11T23:51:55.580-00:00 |
| City | Big Sky |
| Zoning Description | RCSF |
| MLS Area | Greater Big Sky |
| Lot Size Units | Acres |
| Lot Size Square Feet | 559484.64 |
| Tax Annual Amount | 19380.45 |
| MLS Area Minor | 5CS - Gallatin Canyon South |
| Builder Name | Rocky Mountain Rustics |
| Standard Status | Active |
| Occupancy Type | Vacant |
| Property Sub Type Additional | Single Family Residence |
| PostalCity | Big Sky |
| Legal Description | PORCUPINE PARK SUB, S17, T07 S, R04 E, LOT 21A, ACRES 12.844, PLAT J-308B |
Interior Features
| Interior Amenities | Wet Bar,Fireplace,Vaulted Ceiling(s),Walk-In Closet(s),Window Treatments,Sun Room |
|---|---|
| Basement | Bathroom,Bedroom,Egress Windows,Kitchen,Rec/Family Area,Walk-Out Access |
| Flooring | Hardwood,Partially Carpeted,Tile |
| Fireplace Features | Wood Burning |
| Basement (Y/N) | true |
| Heating Y/N | true |
| Window Features | Window Coverings |
| Fireplace Y/N | true |
| Above Grade Finished Area | 2363 |
| 3/4 Baths | 2 |
| Total Bedrooms | 3 |
| Room Type | Three Quarter Bath,Bonus Room,Bedroom,Dining Room,Kitchen,Laundry,Loft,Living Room,Office,Family Room,Wine Room |
| LivingAreaSource | Public Records |
| Total Baths | 3 |
Exterior Features
| Horses | Yes |
|---|---|
| Irrigation/Water Rights | No |
| Fencing | Partial |
| Parking Features | Detached,Garage |
| Water Source | Well |
| Lot Size Area | 12.844 |
| Building Area Total | 3875 |
| Lot Size Acres | 12.844 |
| Road Surface Type | Gravel,Paved |
| Horse Amenities | Stable(s) |
Amenities
- Foreclosure
- Views
- Short Sale
- New Construction
- Adult 55+
- Lease To Own
- No HOA Fees
- Furnished
- Primary On Main
- Air Conditioning
- Seller Finance
- Green
- Fixer Upper
- Horse
- Golf
- Fireplace
- Deck
- Garage
- Basement
- Pool
Property vs Single Family Average in 59730
Price
Taxes
Year Built
All information is subject to change, is deemed reliable but is not guaranteed, and should be independently verified.The information being provided is for consumers' personal, non-commercial use and may not be used for any otherpurpose other than to identify prospective properties consumers may be interested in purchasing. Copyright ® 2026, Montana Regional Multiple Listing Service, Inc. (MRMLS) and FBS. All Rights Reserved.
© 2026 Billings Association of REALTORS ® Incorporated and Billings Multiple Listing Service Incorporated. All rights reserved. Information deemed reliable but not verified or guaranteed. Users are responsible for checking the accuracy, completeness, currency, and status of all information.
Big Sky Country MLS - Gallatin Association of REALTORS® All information deemed reliable but not guaranteed. All properties are subject to prior sale, change or withdrawal. Neither listing broker(s) or information provider(s) shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless. Listing(s) information is provided for consumer's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties
