New 2026 Keystone MONTANA 3901 RK

The 2026 Keystone Montana 3901RK is a 42.3-foot luxury fifth wheel that redefines the high-end camping experience with its unique rear raised kitchen and bath-and-a-half configuration. Utilizing five slideouts to maximize every inch of the 100-inch wide-body frame, the floor plan separates the coach into three distinct zones: a massive, chef-inspired kitchen at the rear with an 18 cu. ft. residential refrigerator and waterfall island, a mid-ship living area with theater seating and a half-bath for guests, and a sprawling front master suite. The primary bedroom features a king bed slide and leads into a massive front bathroom with dual-sink vanities and a walk-in wardrobe prepped for a stackable washer and dryer.

Built for the most demanding travelers, the 3901RK sits on a 12-inch I-beam chassis with Z-frame technology and features the Four Season Living Package, tested and approved for 0°F usage. The unit is equipped with a high-capacity 45,000 BTU triple A/C system, a tankless on-demand water heater, and 12V heat pads on all holding tanks to ensure comfort in any climate. With a dry weight of approximately 15,063 lbs. and a hitch weight of 2,975 lbs., this flagship model requires a one-ton dually truck for safe and stable transit. From its 6-point hydraulic auto-leveling and SolarFlex Protect system to the La-Z-Boy furniture and hardwood cabinetry, the 2026 Montana 3901RK remains the benchmark for luxury extended-stay RVing.

The 2026 Keystone Montana 3901RK is a 42.3-foot luxury fifth wheel that redefines the high-end camping experience with its unique rear raised kitchen and bath-and-a-half configuration. Utilizing five slideouts to maximize every inch of the 100-inch wide-body frame, the floor plan separates the coach into three distinct zones: a massive, chef-inspired kitchen at the rear with an 18 cu. ft. residential refrigerator and waterfall island, a mid-ship living area with theater seating and a half-bath for guests, and a sprawling front master suite. The primary bedroom features a king bed slide and leads into a massive front bathroom with dual-sink vanities and a walk-in wardrobe prepped for a stackable washer and dryer.

Built for the most demanding travelers, the 3901RK sits on a 12-inch I-beam chassis with Z-frame technology and features the Four Season Living Package, tested and approved for 0°F usage. The unit is equipped with a high-capacity 45,000 BTU triple A/C system, a tankless on-demand water heater, and 12V heat pads on all holding tanks to ensure comfort in any climate. With a dry weight of approximately 15,063 lbs. and a hitch weight of 2,975 lbs., this flagship model requires a one-ton dually truck for safe and stable transit. From its 6-point hydraulic auto-leveling and SolarFlex Protect system to the La-Z-Boy furniture and hardwood cabinetry, the 2026 Montana 3901RK remains the benchmark for luxury extended-stay RVing.