Photo by Grand Canyon NPS via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Grand_Canyon_Mather_Campground_-_-_Winter_003_-_32507223597.jpg) (CC BY 2.0)
2025 Keystone Montana 3855BR
by Keystone
Full Specifications
General Info
| Manufacturer | Keystone |
| Country of Origin | USA |
| Year | 2025 |
| Category | Fifth Wheel |
| Subcategory | — |
Dimensions & Weight
| Length | 28.5 ft |
| Width | 8.5 ft |
| Height | 13 ft |
| Dry Weight | 12,000 lbs |
| GVWR | 16,300 lbs |
| Hitch Weight | 1,200 lbs |
| Cargo Capacity | 4,300 lbs |
Engine & Chassis
| Fuel Type | N/A |
| Engine | — |
| Chassis | — |
| Horsepower | — |
| Fuel Capacity | — |
Living & Off-Grid
| Sleeping Capacity | 6 |
| Slide-Outs | 4 |
| Awning Length | 17.5 ft |
| A/C | 15,000 BTU |
| Furnace | 30,000 BTU |
| Fridge | 2-way (LP/Electric) |
| Fresh Water | 67 gal |
| Gray Water | 55 gal |
| Black Water | 48 gal |
| Solar | 300 W |
| Battery | 300 Ah |
| Inverter | 1,500 W |
About the 2025 Keystone Montana 3855BR
For those who want the maximum amount of living space in a towable package, the 2025 Keystone Montana 3855BR by Keystone delivers exactly that. This 2025 fifth wheel leverages its unique hitch design to create split-level luxury.
At 28.5 feet long, 8.5-foot width and standing 13.0 feet tall, the 2025 Keystone Montana 3855BR tips the scales at 12,000 pounds dry weight, with a GVWR of 16,300 lbs, leaving you 4,300 lbs of cargo carrying capacity. The floorplan features 4 slide-outs that dramatically expand the living area when parked.
Accommodating up to 6 sleepers, the 2025 Keystone Montana 3855BR 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 3855BR comes equipped with 67 gallons of fresh water capacity, 55 gallons of gray water holding, a 48-gallon black water tank. For electrical needs, the unit provides 300 watts of factory-installed solar, 300 amp-hours of battery storage, a 1500-watt inverter for household AC power. A 15,000 BTU air conditioner keeps things cool in summer heat, and 30,000 BTU of furnace output tackles chilly evenings. The kitchen features a 2-way (LP/Electric) refrigerator for keeping provisions cold. Outside, a 17.5-foot power awning provides welcome shade for outdoor dining and relaxation.
At 12,000 pounds dry, the 2025 Keystone Montana 3855BR requires a capable tow vehicle. with 1,200 lbs of hitch weight to account for in your towing setup. When loaded to capacity at 16,300 lbs GVWR, proper weight distribution becomes essential for safe towing.
At $97,000, this model offers a balanced combination of features and value in the Fifth Wheel category, hitting the sweet spot that most buyers are shopping in. Seasonal campers, extended travelers, and those with a dedicated truck for towing will find the 2025 Keystone Montana 3855BR provides some of the best livable space per dollar in the entire RV market.
For 2025, the 2025 Keystone Montana 3855BR continues to demonstrate why Keystone remains a respected name in the RV industry. It delivers a compelling combination of comfort, capability, and craftsmanship that holds up under real-world scrutiny.
The 2025 Keystone Montana 3855BR proves that towable RVs can rival — and even exceed — many motorhomes in comfort, space, and amenities.
The 67-gallon fresh water system, combined with 55/48-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.
Standard features include a 300-watt solar prep, 300 Ah battery bank, and 1,500-watt inverter. The 17.5-foot power awning extends the living space outdoors. Priced from $97,000, the 2025 Keystone Montana 3855BR is a compelling choice for full-time and extended-travel RVers.