2026 Keystone Montana High Country385BR

The 385BR is the flexible one. Its defining feature is a middle bonus room that can be an office, a guest room, a craft room or a hangout — a hide-a-bed sofa rides on a slide to free up floor, and a desk is built in for working on the road — with a loft above it for still more sleeping space. The living area up front adds a second hide-a-bed, power theater seating, a fireplace and a 50-inch TV, and the front king bedroom has storage underneath; the galley island carries a countertop extension, and an outdoor kitchen and a MORryde Solid Step round out the exterior. It sleeps ten on four slide-outs in a 40-foot-9-inch body, on 7,000-pound Dexter Gladiator axles, a MORryde CRE-3000 suspension, Ground Control six-point electric auto-leveling and a 12-inch I-beam.

Published figures put the dry weight at 13,794 pounds and the dry pin at 2,685, and adding the 2,891-pound cargo capacity gives a 16,685-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 $113,100 — the highest of the profiled plans, with street pricing below placard — the 385BR is the High Country for buyers who want a genuine bonus room and outdoor kitchen without stepping up to the full-size Montana, towed behind a properly rated three-quarter-ton or one-ton truck.

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 385BR 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 22% of the 2,891-pound cargo capacity, leaving the 385BR with a usable gear budget even when you tow full.

The published dry pin weight of 2,685 pounds is 19% of this floorplan’s 13,794-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 16,685-pound GVWR the 385BR is towing 2,891 pounds more than its 13,794-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 385BR sits 5 of 6 in the Montana High Country line: 16,685 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 351BH is 30 pounds lighter at 16,655 lb GVWR; and Montana High Country 373RD is 95 pounds heavier at 16,780 lb GVWR.

Against the 385BR: the Columbus 388FKH is 2 ft longer; the Puma Mesa 388FKH is 2 ft longer; the Montana 3231CK is 5 lb lighter and 3 ft shorter and sleeps 6 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 385BR. 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.