01 What makes it unique
The 351BH is the shorter of the two High Country bunkhouses and the more maneuverable family plan. It puts a rear bunk room with sleeping for the kids behind the main living area, a coffee station and an island kitchen amidships, and a king bedroom up front — on three slide-outs in a 39-foot body that sleeps eight. It runs the full luxury package: a GE 18-cubic-foot residential refrigerator with a 2,000-watt inverter, a three-burner range, a 5,000-BTU fireplace and a central vacuum, on 7,000-pound Dexter Gladiator axles with a MORryde CRE-3000 suspension and Ground Control six-point electric auto-leveling, on the 12-inch I-beam used across the larger plans.
Published figures put the dry weight at 13,278 pounds and the dry pin at 2,655, and adding the 3,377-pound cargo capacity gives a 16,655-pound GVWR. A single 15,000-BTU Coleman Mach Quiet Series air conditioner with a heat pump, a 35,000-BTU furnace, an on-demand tankless water heater and 75/87/48-gallon fresh/grey/black tanks are standard. At a starting MSRP around $104,600, with street pricing below placard, the 351BH is the High Country for a family that wants bunks and a private front bedroom in the shortest bunkhouse body — three-quarter-ton or one-ton territory once loaded.
02 Full specifications
Dimensions
- Exterior length
- 39' 0"
- Exterior height
- 13' 4"
- Chassis
- 12" I-beam z-frame · Ground Control 6-point electric auto-level
Weights
- Dry / unit base weight (UVW)
- 13,278 lbs
- GVWR (max loaded)
- 16,655 lbs
- Net cargo / payload (CCC)
- 3,377 lbs
- Dry pin (hitch) weight
- 2,655 lbs
Capacities
- Fresh water
- 75 gal
- Grey water
- 87 gal
- Black water
- 48 gal
- Refrigerator
- 18 cu ft
Construction
- Front cap
- MaxTurn™ front cap · KeyShield™ automotive-grade paint
- Suspension
- MORryde CRE-3000 rubberized · wet-bolt fasteners
- Walls
- 2″ composite-backed high-gloss laminated fiberglass
- Roof
- Alpha seamless TPO membrane · fully walkable
- Underbelly
- Four Seasons Living (0°-tested) · enclosed & heated · forced hot air + electric tank heaters
Running gear
- Axles
- 2 × 7,000-lb Dexter Gladiator
- Hitch
- Fifth-wheel (in-bed) · MORryde rubber pin box
- Brakes
- Nev-R-Adjust self-adjusting
- Tires
- 16″ Rainier ST235/80R16 load-range-H
Galley & bath
- Range
- Three-burner cooktop · residential microwave
- Refrigerator
- GE 18 cu ft residential · 2,000W inverter
- A/C
- 1 unit · 15K BTU Coleman Mach Quiet Series ducted A/C w/ heat pump
- Water heater
- On-demand tankless
Sleeping & layout
- Sleeps
- 8
- Slides
- 3
- Entries
- 1
- Awnings
- 2
- Primary bed
- King
03 The Montana High Country floorplan family
Montana High Country is Keystone's lighter luxury fifth wheel, below the full-size Montana and cross-shopped against Grand Design's Reflection and Solitude, Forest River's Cedar Creek and Sabre, Alliance's Avenue and Jayco's Pinnacle. The 2026 line runs to eleven floorplans; the six broadest-appeal layouts are profiled in full, and the 351BH on this page is highlighted. The full lineup, including the catalogued plans, is on the line hub.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| 295RL | 34 ft | 6 | Rear living, kitchen island, high payload |
| 351BH | 39 ft | 8 | Bunkhouse, triple slides |
| 385BR | 40 ft | 10 | Mid bonus room, loft, outdoor kitchen |
| 373RD | 41 ft | 8 | Elevated rear den, fireplace, king bed |
| 377FL | 41 ft | 10 | Front living, four slides |
| 381TB | 42 ft | 10 | Two full baths, two bedrooms, loft |
Montana High Country is Keystone's lighter, lower-profile luxury fifth wheel, positioned just below the full-size wide-body Montana on a standard-width chassis. The 2026 line runs to eleven floorplans; the six broadest-appeal layouts are profiled here in full and the rest are catalogued on the hub. Every High Country rides on 7,000-pound Dexter Gladiator axles with Nev-R-Adjust brakes, a MORryde CRE-3000 rubberized suspension and rubber pin box, and 16-inch load-range-H tires, with Ground Control electric auto-leveling (four-point on the smaller plans, six-point on the larger), a MaxTurn front cap with KeyShield paint, an Alpha seamless walkable TPO roof, 2-inch composite-backed fiberglass walls and a Four Seasons Living enclosed heated underbelly. The residential package is standard: a GE 18-cubic-foot refrigerator with a 2,000-watt inverter, a three-burner range, a 15,000-BTU Coleman Mach Quiet Series air conditioner with heat pump, a 35,000-BTU furnace, an on-demand tankless water heater, a central vacuum, a 5,000-BTU fireplace and a king bed. Dry weight and CCC are published figures and GVWR is shown as their sum; real loaded pin weights run higher — always weigh the loaded coach and confirm against your truck's payload and rear-axle ratings.
04 What owners & reviewers report
Rear bunk room, triple slides
A dedicated rear bunk room for the kids behind the living area, with a private king bedroom up front — the compact family layout.
Shorter of two bunkhouses
At 39 feet and three slides it is more maneuverable than the four-slide 389BH while still sleeping eight.
Full luxury equipment
Carries the complete High Country standard list — GE 18-cu-ft fridge with inverter, six-point electric auto-leveling, central vacuum, tankless water.
Wants a three-quarter-ton+ truck
A 16,655-pound-GVWR bunkhouse — confirm a properly rated three-quarter-ton or one-ton truck's payload and rear-axle rating against the loaded pin.
05 How it compares
Grand Design’s family-oriented luxury fifth wheel in the same length class.
The four-slide 389BH bunkhouse — longer, more living space and a heavier ten-berth capacity.
The rear-living 295RL — shorter, lighter and a couples’ plan rather than a bunkhouse.