NEW 2026 KEYSTONE MONTANA 3915TB

The 2026 Keystone Montana 3915TB is a luxury fifth-wheel RV known for its spacious, family-friendly floor plan with two full bathrooms. It features a mid-kitchen layout and is equipped with premium residential-style amenities

Key features

• Family-oriented floor plan: With four slide-outs and two full bathrooms, the RV can comfortably sleep up to nine people.

• Four-season living package: The trailer is built with an insulated underbelly and holding tanks, which extends its use into colder weather.

• Middle kitchen and living area: The main living space includes power theater seating, a hide-a-bed sofa, and a well-equipped kitchen.

• Comfort and luxury: Features include a La-Z-Boy furniture package, hardwood cabinetry, solid-surface countertops, and a central vacuum.

• Modern appliances: The kitchen comes standard with an 18-cubic-foot residential refrigerator with an ice maker and a convection microwave. A larger 20-cubic-foot 12V refrigerator is also available as an option.

• Bedroom options: The front bedroom is equipped with a king-size bed, though a queen bed is an available option. The RV is also prepped for a washer and dryer.

• Outdoor living: Two power awnings with LED lights provide a comfortable outdoor space. 

Dimensions and weight

• Length: 43’

• Exterior height: 13’ 4”

• Dry weight: 15,222 LBS

• Axles: 2

Tank capacities

• Fresh water: 70 GALS

• Gray water: 137 GALS

• Black water: 98 GALS

• LP tank: 2-30LB TANKS

• Water heater: 16 GALS 

Interior features

• Sleeping capacity: Sleeps up to 9 people

• Layout: Includes four slide-outs to maximize living space, a middle kitchen and living area, and a large front bedroom

• Kitchen: Features an 18 cu. ft. residential refrigerator with ice maker, solid-surface countertops, and a convection microwave. A free-standing legless dinette with luxury chairs is also standard

• Bathroom: Two full bathrooms are included. The larger bath has a 30" x 48" residential fiberglass shower with a seat

• Bedroom: A king-size bed is standard, with an optional queen bed available. It also includes a 32" Smart LCD TV and reading lights

• Climate control: Equipped with a 35,000 BTU furnace and a CX3 package for triple 15,000 BTU air conditioning, plus a 5,000 BTU decorative fireplace heater

• Other features: A central vacuum system, La-Z-Boy furniture package, washer/dryer prep, and a 50" Smart TV are all included

Exterior features

• Construction: Includes a 12" I-beam chassis with Z-frame technology, a fully walkable roof, and frameless tinted safety glass windows

• Awnings: Comes with two power awnings (11' and 16') with LED lights

• Insulation: Designed for four-season living with a heated and enclosed underbelly, insulated slide floors, and reflective foil in the front cap

• Power: 50-amp electrical service