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Fifth Wheel · Luxury Full-Profile · Single-Source Profile

2026 Keystone Montana High Country351BH

A triple-slide bunkhouse under 40 feet — the way into a High Country family plan, with a rear bunk room and a private front bedroom.

Tow-Critical Data — as built, MY2026

13,278lb
Dry Weight
16,655lb
GVWR
2,655lb
Pin Weight
39ft
Length
Sleeps 8 Luxury Fifth Wheel · Bunkhouse, triple slides Built by · Keystone Running gear · 7,000-lb Dexter · electric auto-level Starting MSRP · $104,648

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.

FloorplanNominalSleepsNotable
295RL34 ft6Rear living, kitchen island, high payload
351BH39 ft8Bunkhouse, triple slides
385BR40 ft10Mid bonus room, loft, outdoor kitchen
373RD41 ft8Elevated rear den, fireplace, king bed
377FL41 ft10Front living, four slides
381TB42 ft10Two 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.

SOURCING — ownership notes to be expanded with cited threads from owner communities & forums per the data plan

05 How it compares

↔ Cross-shop
Grand Design Reflection 340RDS

Grand Design’s family-oriented luxury fifth wheel in the same length class.

↑ Step up
Montana High Country 389BH

The four-slide 389BH bunkhouse — longer, more living space and a heavier ten-berth capacity.

↓ Step down
Montana High Country 295RL

The rear-living 295RL — shorter, lighter and a couples’ plan rather than a bunkhouse.