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2025 Keystone Montana 3531RE
by Keystone
Full Specifications
General Info
| Manufacturer | Keystone |
| Country of Origin | USA |
| Year | 2025 |
| Category | Fifth Wheel |
| Subcategory | — |
Dimensions & Weight
| Length | 35.5 ft |
| Width | 8 ft |
| Height | 13 ft |
| Dry Weight | 12,700 lbs |
| GVWR | 16,100 lbs |
| Hitch Weight | 2,410 lbs |
| Cargo Capacity | 3,400 lbs |
Engine & Chassis
| Fuel Type | N/A |
| Engine | — |
| Chassis | — |
| Horsepower | — |
| Fuel Capacity | — |
Living & Off-Grid
| Sleeping Capacity | 6 |
| Slide-Outs | 3 |
| Awning Length | 14.5 ft |
| A/C | 15,000 BTU |
| Furnace | 30,000 BTU |
| Fridge | 3-way absorption |
| Fresh Water | 96 gal |
| Gray Water | 75 gal |
| Black Water | 41 gal |
| Solar | 250 W |
| Battery | 250 Ah |
| Inverter | 3,000 W |
About the 2025 Keystone Montana 3531RE
The 2025 2025 Keystone Montana 3531RE from Keystone is a fifth wheel trailer that delivers near-residential living space on wheels. The raised forward section and bi-level floorplan create an interior experience unlike any other towable RV type.
Stretching 35.5 feet from bumper to bumper, a width of 8.0 feet and with a height of 13.0 feet, the 2025 Keystone Montana 3531RE has a dry weight of 12,700 lbs, with a GVWR of 16,100 lbs, leaving you 3,400 lbs of cargo carrying capacity. With 3 slide-outs, the interior opens up considerably at camp, creating a spacious feel.
Accommodating up to 6 sleepers, the 2025 Keystone Montana 3531RE is built for family camping trips and group getaways. Multiple sleeping zones ensure everyone has their own space, from dedicated bunks to convertible living areas that transform as the day winds down.
For extended stays away from hookups, the 2025 Keystone Montana 3531RE comes equipped with 96 gallons of fresh water capacity, 75 gallons of gray water holding, a 41-gallon black water tank. Electrical independence comes via 250 watts of factory-installed solar, 250 amp-hours of battery storage, a 3000-watt inverter for household AC power. 15,000 BTU of air conditioning handles warm-weather comfort, while a 30,000 BTU furnace ensures warmth during cold nights. A 3-way absorption refrigerator keeps provisions fresh on the road and at camp. A 14.5-foot awning extends your living space outdoors, providing shade and shelter.
Towing the 12,700-pound 2025 Keystone Montana 3531RE demands adequate tow capacity from your truck. with 2,410 lbs of hitch weight to account for in your towing setup. Make sure your tow vehicle is rated for the 16,100-lb GVWR when fully loaded with gear and water.
The $165,000 asking price places the 2025 Keystone Montana 3531RE among the more refined options, delivering a notch above the typical Fifth Wheel experience in both materials and execution. The 2025 Keystone Montana 3531RE is an excellent choice for families with children who want everyone to have their own sleeping space on camping trips without the hassle of setting up tents.
All things considered, the 2025 Keystone Montana 3531RE from Keystone packs a strong feature set into a well-designed package. It deserves careful consideration alongside any competitor in the Fifth Wheel space, and a thorough walk-through will likely confirm its appeal.
The 2025 Keystone Montana 3531RE proves that towable RVs can rival — and even exceed — many motorhomes in comfort, space, and amenities.
The 96-gallon fresh water system, combined with 75/41-gallon gray/black tanks, supports extended boondocking. Dual AC systems providing 15,000 BTU of cooling and a 30,000 BTU furnace ensure comfort in any climate.
The 2025 Keystone Montana 3531RE is built with residential-height ceilings in the main living area, washer/dryer prep, and a 50-amp electrical system. Starting at $165,000, it competes favorably with coaches costing twice as much.