2026 Keystone Montana High Country351BH

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.

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.

This floorplan carries its water comfortably. A full 75-gallon fresh tank is roughly 19% of the 3,377-pound cargo capacity, leaving the 351BH with a usable gear budget even when you tow full.

The published dry pin weight of 2,655 pounds is 20% of this floorplan’s 13,278-pound dry weight. Fifth-wheel pin weight rides in the bed of the truck, so it comes off payload rather than off tow rating — and it rises with the trailer as you load it, not in proportion to what you put over the axles.

Nothing above changes the ceiling. Loaded to its 16,655-pound GVWR the 351BH is towing 3,377 pounds more than its 13,278-pound dry figure, and that is the number your vehicle has to be rated for — not the brochure weight.

Tank balance is generous here: 75 gallons of fresh against 87 grey and 48 black, so waste capacity keeps pace with supply and the fresh tank is the constraint that ends a dry stay.

Ranked by GVWR, the 351BH sits 4 of 6 in the Montana High Country line: 16,655 pounds against a line that runs from 15,203 to 16,780 pounds. That position is the useful thing to know, because the plans immediately either side of it are the real alternatives.

Either side of it in the same line: Montana High Country 377FL is 35 pounds lighter at 16,620 lb GVWR; and Montana High Country 385BR is 30 pounds heavier at 16,685 lb GVWR.

Against the 351BH: the Columbus 383RLH is 20 lb lighter and 2 ft longer; the Puma Mesa 383RLH is 20 lb lighter and 2 ft longer; the Montana 3231CK is 25 lb heavier and 2 ft shorter and sleeps 4 fewer. Those are differences in the published numbers only — what they cost, how they are built and how they live are separate questions each of those pages answers on its own terms.

Those are the nearest fifth wheels from other lines by weight — one per line, picked by proximity on that figure and nothing else. They are listed so the same tow vehicle can be checked against real alternatives, not because they are equivalent inside; layout, build and price diverge sharply across that group.

For scale, the Montana High Country floorplans profiled here run 11,595 to 14,364 pounds dry and 34 to 42 feet of exterior length across 6 plans. Where a floorplan falls in that spread usually says more about which vehicle can tow it, and which site it fits, than the layout name does.

Every profiled floorplan in this line, with the full weight table, is on the Montana High Country line hub.

This catalog tracks 18 specification fields per floorplan. Named sources publish 16 of them for the 351BH. The rest are not shown, because the alternative is reading a figure across from a sibling floorplan or from what the segment usually does — and a number nobody published is worth less than an admitted gap.

Not published for this floorplan: exterior width, interior height. If you find one of these in a manufacturer document for this plan, it belongs on this page.

The completeness figure at the foot of this page (95%) measures the same thing on the full field set: it is a measurement of how much this floorplan’s manufacturer publishes, not of how much research went into the page.

How every figure here was sourced and checked is set out on the methodology page.