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.

A full 75-gallon fresh tank is about 626 lb of water (water counts as cargo: 49 CFR 571.120 S10.4.2), 22% of the 385BR’s 2,891 lb cargo capacity, leaving 2,266 lb (227 lb per rated berth). Across 6 Montana High Country floorplans the water share runs 17% to 28%, and 1 gives up more than this one. Nearest on that share: Montana High Country 377FL at 20% and Montana High Country 381TB at 28%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.120 S10.4.3).

Closest sibling: the Montana High Country 373RD, nearest on the published figures. It differs on 6 of the 9 fields both publish (this plan first): length 40 ft 9 in vs 41 ft 4 in; sleeps 10 vs 8; dry weight 13,794 lb vs 13,399 lb; GVWR 16,685 lb vs 16,780 lb; cargo capacity 2,891 lb vs 3,381 lb; dry hitch weight 2,685 lb vs 2,780 lb. They match on fresh tank, grey tank and black tank.

Either side of it by GVWR: Montana High Country 351BH is 30 lb lighter (16,655 lb GVWR); Montana High Country 373RD is 95 lb heavier (16,780 lb GVWR).

All 6 Montana High Country floorplans: Montana High Country line hub.

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.

16 of the 18 fields this catalogue tracks are published for the 385BR. Not published: exterior width, interior height.

Sourcing rules: methodology.