2026 Keystone Montana3781RL

The 3781RL is the plan dealers move most. It is a four-slide rear-living Montana with a kitchen island, a floor-to-ceiling pantry, a private front bedroom with a king bed and a conventional rear lounge — the configuration the largest share of Montana buyers choose, which is why dealers stock it deepest and discount it hardest. An outside shower and dual power awnings round out the exterior.

It rides on the full Montana luxury build — the 12-inch I-beam z-frame chassis, the walkable Alpha TPO roof, the Four-Season Living package, hardwood cabinetry, solid-surface counters and the La-Z-Boy furniture package. The 14,290-pound dry weight places it just above the mid plans; the GVWR and payload shown are flagged because the 2026 structured payload was not separately published, so the figures carry the line’s 18,000-pound rating pending plan-specific confirmation. A single 15,000-BTU Coleman Mach heat-pump air conditioner is standard with a triple-15K package optional.

It is the Montana for a buyer who wants the most-shopped, easiest-to-resell rear-living layout in the line.

Montana is Keystone’s luxury fifth-wheel line. The line runs to fifteen floorplans for 2026; the six highest-demand layouts are profiled here in full, and the rest — along with the lighter, lower-profile Montana High Country sub-line — are catalogued on the line hub. The 3781RL on this page is highlighted; each other profiled plan links to its own page.

A full 70-gallon fresh tank is about 584 lb of water (water counts as cargo: 49 CFR 571.120 S10.4.2), 16% of the 3781RL’s 3,710 lb cargo capacity, leaving 3,126 lb (782 lb per rated berth). Across 13 Montana floorplans the water share runs 15% to 28%, and 11 give up more than this one. Nearest on that share: Montana 3795FK at 15% and Montana 3123RL at 16%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.120 S10.4.3).

No source publishes a dry pin weight for the 3781RL, so its hitch load has to come from a scale ticket taken with the trailer hitched.

Closest sibling: the Montana 3231CK, nearest on the published figures. It differs on 4 of the 8 fields both publish (this plan first): length 41 ft 0 in vs 37 ft 5 in; dry weight 14,290 lb vs 13,169 lb; GVWR 18,000 lb vs 16,680 lb; cargo capacity 3,710 lb vs 3,511 lb. They match on sleeps, fresh tank, grey tank and black tank.

Either side of it by GVWR: Montana 3761FL matches it at 18,000 lb GVWR; Montana 3795FK matches it at 18,000 lb GVWR.

All 13 Montana floorplans: Montana line hub.

Against the 3781RL: the Cedar Creek 381MUD is 2 ft longer and sleeps 4 more; the Influence 3003RL is 6 ft shorter; the Paradigm 375RD sleeps 1 more.

15 of the 18 fields this catalogue tracks are published for the 3781RL. Not published: dry hitch weight, tire specification, awning.

Values marked with an asterisk are arithmetic on published figures or come from a single source; the flag travels into the downloadable spec sheet.

Sourcing rules: methodology.