2026 Keystone Montana3857BR

The 3857BR is the Montana built for families. Its defining feature is a middle bunkroom with a loft above it — a dedicated kids’ or guest sleeping zone amidships, separate from the private rear bedroom suite — which pushes the plan’s sleeping capacity to eight, the most of any profiled Montana. Four slides open the main living and kitchen area, keeping the family’s shared space generous even with the extra berths.

It does this without giving up the luxury build. The 3857BR carries the same 12-inch I-beam z-frame chassis, walkable Alpha TPO roof, Four-Season Living package, La-Z-Boy furniture package, hardwood cabinetry and 18-cubic-foot residential refrigerator on a 2,000-watt inverter as the couples’ plans, with a king bed in the rear suite, a 50-inch living-room TV and a single 15,000-BTU Coleman Mach heat-pump air conditioner standard. RVUSA lists a 3,050-pound dry pin — the heaviest of the six, reflecting the forward bunkroom mass — against the line’s 18,000-pound GVWR, which leaves a 2,382-pound payload.

At an MSRP of $130,688 it sits alongside the other large plans on price. The trade-off to read carefully is payload: at 2,382 pounds it is the tightest of the profiled plans, and a family’s gear, water and supplies eat into it quickly — weigh the loaded coach. For families who want Montana luxury and need to sleep eight, the bunkroom-and-loft 3857BR is the plan.

Montana is Keystone's flagship luxury fifth wheel and the best-selling luxury fifth wheel in North America. 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 3857BR on this page is highlighted; each other profiled plan links to its own page.