2026 Keystone Montana High Country377FL

The 377FL inverts the usual layout: the living area sits up front over the hitch as a raised front room, with the kitchen and the rest of the coach stepping down behind it. It is the entertainer of the profiled plans — a front great room on four slide-outs, sleeping ten, in a body just under 42 feet. The equipment is the standard High Country 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, 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 13,513 pounds and the dry pin at 2,620, and adding the 3,107-pound cargo capacity gives a 16,620-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 75/78/39-gallon fresh/grey/black tanks are standard — note the smaller grey and black tanks that come with the front-living floor. At a starting MSRP around $108,600, with street pricing below placard, the 377FL is the High Country for buyers who want a front entertainment room and ten-berth capacity, and who tow with 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 377FL on this page is highlighted. The full lineup, including the catalogued plans, is on the line hub.