2026 Keystone Montana High Country381TB

The 381TB is the High Country built for a big or multi-generational family. It carries two full baths and two bedrooms — a front king suite and a rear bedroom with its own private entry — with a queen loft above the rear bedroom for two more, all wrapped around a center living area opened up by large slide-outs. The kitchen runs a coffee hutch and an island with dual extendable countertops, and the bath adds a skylight shower. It sleeps ten on four slide-outs in a 42-foot-5-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 14,364 pounds — the heaviest of the profiled plans — and the dry pin at 2,705, and adding the 2,254-pound cargo capacity gives a 16,618-pound GVWR. That cargo number is the tightest of the profiled range, so watch payload closely: a full family plus water and gear eats into 2,254 pounds quickly. 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 generous 75/135/98-gallon fresh/grey/black tanks are standard. At a starting MSRP around $108,800, with street pricing below placard, the 381TB is the two-bath High Country for large families — firmly 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 381TB 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), 28% of the 381TB’s 2,254 lb cargo capacity, leaving 1,628 lb (163 lb per rated berth). Across 6 Montana High Country floorplans the water share runs 17% to 28%, and this plan’s is the highest. Nearest on that share: Montana High Country 385BR at 22%. 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 385BR, nearest on the published figures. It differs on 7 of the 9 fields both publish (this plan first): length 42 ft 5 in vs 40 ft 9 in; dry weight 14,364 lb vs 13,794 lb; GVWR 16,618 lb vs 16,685 lb; cargo capacity 2,254 lb vs 2,891 lb; dry hitch weight 2,705 lb vs 2,685 lb; grey tank 135 gal vs 87 gal; black tank 98 gal vs 48 gal. They match on sleeps and fresh tank.

Either side of it by GVWR: Montana High Country 295RL is 1,415 lb lighter (15,203 lb GVWR); Montana High Country 377FL is 2 lb heavier (16,620 lb GVWR).

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

Against the 381TB: the Cedar Creek 371FL is 3 lb lighter; the Columbus 383RLH is 17 lb heavier and 1 ft shorter; the Puma Mesa 383RLH is 17 lb heavier and 1 ft shorter.

16 of the 18 fields this catalogue tracks are published for the 381TB. Not published: exterior width, interior height.

Sourcing rules: methodology.