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.

A full 75-gallon fresh tank is about 626 lb of water (water counts as cargo: 49 CFR 571.120 S10.4.2), 19% of the 351BH’s 3,377 lb cargo capacity, leaving 2,752 lb (344 lb per rated berth). Across 6 Montana High Country floorplans the water share runs 17% to 28%, and 3 give up more than this one. Nearest on that share: Montana High Country 373RD at 19% and Montana High Country 377FL at 20%. 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 5 of the 9 fields both publish (this plan first): length 39 ft 0 in vs 41 ft 4 in; dry weight 13,278 lb vs 13,399 lb; GVWR 16,655 lb vs 16,780 lb; cargo capacity 3,377 lb vs 3,381 lb; dry hitch weight 2,655 lb vs 2,780 lb. They match on sleeps, fresh tank, grey tank and black tank.

Either side of it by GVWR: Montana High Country 377FL is 35 lb lighter (16,620 lb GVWR); Montana High Country 385BR is 30 lb heavier (16,685 lb GVWR).

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

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.

16 of the 18 fields this catalogue tracks are published for the 351BH. Not published: exterior width, interior height.

Sourcing rules: methodology.