2026 Keystone RV Montana 3781RL Cobalt
















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Description
2026 Keystone RV Montana 3781RL Cobalt
North America's #1 Selling Fifth Wheel
Montana has earned its reputation the hard way. Not on a showroom floor, but out on the road. Built by experienced craftsmen and shaped by owners who put real miles behind every decision, Montana is designed around how people actually live and travel. That work shows up in the details. A better warranty, backed by an industry-leading five-year structural commitment. A better ride. Smarter storage. A master suite designed for real time on the road. And an overall experience built to hold up season after season, supported by better materials, a stronger foundation, and customer support that stays with you. Montana. Proven by the People.
Features May Include:
Exterior
- 12" I-beam w/ z-frame technology
- MORryde® Rubber Pin Box
- 2" thick dual-layered lauan, high-gloss fiberglass sidewalls w/ double laminated & insulated rear wall
- 4k Square Frameless tinted safety glass windows
- MaxTurn™ front cap w/ KeyShield™ automotive-grade paint
- Fully walkable roof w/ Alpha seamless TPO membrane system and 5" rafters
- Rear ladder
- Hydraulic slideouts on main level w/ individual switches & electric slideouts on upper deck
- Insulated underbelly w/ forced hot air & electric tank heaters
- 7000 lb Dexter Gladiator® thick wall axles w/ upgraded springs & Nev-R-Adjust® brakes
- MORryde® CRE3000 Suspension with wet bolts
- 17.5" Wheels
- H-Rated Tires
- H-RatedTires
- TPMS Prep
- 6' 6" tall 30" wide entry door w/ screen & friction hinge
- 6' 4" tall 30" wide entry door w/ screen defender, friction hinge, & screen assist handle
- 4 Step entry steps w/ strut assist
- MORryde® Step Above® entry steps w/ strut assist
- Large pass through storage w/ oversized slam latch door
- Back-up camera prep
- 2nd battery disconnect dedicated to residential refrigerator (inverter models)
- Dual battery boxes
- Water connections, black tank flush, outside shower w/ quick connect hose, winterization kit, water heater bypass, power tank fill, waste & water handle valves, 110V outlet, shutoff valve, 12V compartment light, enclosed low point drains, intuitive KeyTV™ satellite/cable/ antennae source control
- Seamless roto-cast holding tanks
- 50 Amp electrical service w/ detachable cord & 110v exterior outlet
- Outside shower w/ quick disconnect hose
- Lippert 12V electric patio awning(s) w/ LED lights
- 2nd Lippert 12V electric patio awning(s) w/ LED lights
- 3000 lb towing hitch
- MORryde® Safe-T-Rail door handle
- Lippert Titan™ leveling system w/ touch screen and underlights
- 12V distribution Giggy Box™
Interior
- Hardwood decorative slideout fascia
- Reflective window shades built into window
- Beauflor® vinyl flooring throughout
- Hardwood decorative window frames
- Hardwood cabinetry, stiles, & framing
- Decorative backlit crown molding in living area, hardwood base molding in hallway and living area
- 5K BTU decorative fireplace heater in Bedroom and Living Room
- La-Z-Boy Furniture Package
- 5K BTU decorative fireplace heater
- Central vacuum
Keystone Exclusives
- 3-year limited structural warranty
- 1-year limited base warranty
- Color-coded unified wiring standard
- 4G LTE and Wi-Fi prep
- Tuf-Lok™ thermoplastic duct joiners
- KeyTV™ multisource signal controller
- Tru-fit™ slide construction
- Blade Pure™
Kitchen Features
- Full extension ball bearing drawer glides, hidden cabinet hinges
- Solid surface kitchen countertops
- Oversized deep stainless steel sink with attachments
- High-rise pull down faucet
- Kitchen power vent fan w/ rain sensor
- Flush floor slideout(s)
- Free standing legless dinette w/ leaf, 110 V outlets, luxury chairs
Appliances & Utilities
- (2) 40 lb LP tanks w/ auto changeover
- (2) 30 lb LP tanks w/ auto changeover
- 15K BTU Coleman Mach Quiet Series ducted A/C w/ heat pump main A/C
- Starlink Prep
- CX3 package: Triple 15K BTU A/C Package
- 35K BTU furnace
- 60K BTU Suburban On Demand Water Heater
- 16 gal. gas or electric quick recovery water heater
- 55" 4K Smart TV and JBL 2.1 Soundbar and Subwoofer
- 50" Smart TV & AM/FM/USB stereo w/ JBL® Aura Mizone 3 zone volume control
- 18 Cu. Ft. residential refrigerator w/ 2000w inverter
- Residential size stainless steel convection microwave
- 24" Furrion Stove w/ Matching stainless Steel Drawer
- 24" Furrion freestanding 4-burner range with 3.7 Cu Ft Oven
- Stackable washer/dryer prep
- Pendant style island light w/ ceiling treatment
Bedroom Features
- King size bed
- Adjustable reading lights
- USB & 110V outlets bedside
- Adjustable stem reading lights w/ night light function
- Foam mattress & decorative bedspread/pillow package
- 40" 4K SMART TV in Bedroom
- Wood TV cabinet w/ 32" SMART LCD TV
Bathroom Features
- Decorative vanity w/ stainless sink
- Residential 30" X 48" fiberglass shower w/ decorative glass enclosure, skylight, & molded accessory/foot shelf
- Porcelain foot flush toilet
- Bathroom power vent fan w/ rain sensor
Weather Protection
- Four Season Living Package
- 12V heat pads on holding tanks
- Astrofoil insulated slide floors & underbelly
- Dual attic vents
- Heated and enclosed underbelly, convenience center, & dump valves
- Reflective foil insulated front cap
- Tested and approved for 0° usage
Safety
- Breakaway switch
- GFI receptacles
- CO detector
- Smoke detector
- Propane gas leak detector
- Fire extinguisher
Options:
Exterior
- Dual pane frameless windows w/ safety tint
- Generator prep
- LP generator
- Slide-out awning package
- MORryde® Independent Suspension System
- Volcano full body paint
- Cobalt full body paint
- Sterling full body paint
- Glacier full body paint
- Furrion Vision S side & rear observation system
- Electric power cord reel
- Surge protector
- Winegard 4G gateway router
- Rear fiberglass cap
- Electric Dump Valves
- Starlink Standard Kit w/ panel installed on roof
Appliances & Utilities
- 20 Cu. Ft. 12V refrigerator
Bedroom Features
- 60" x 80" full size queen bed
Legacy Edition Package
- Dexter® disc brakes
Info
Industry
RV
Make
Keystone RV
Model
Montana 3781RL
Trim
Cobalt
Year
2026
MSRP
N/A
Category
Travel Trailer
Subcategory
Fifth Wheel
Specs
Weight
Shipping: 14,290 lb.
Frame
12 in I-beam w/ z-frame technology
Hitch Weight
2,695 lb. | 3000 lb towing hitch
Length
41 ft 0 in
Height (Ext)
13 ft 4 in
Tire Size
215/75R17.5H
Fresh Water
70 gal.
Grey Water
88 gal.
Black Water
49 gal.
Sleeps
4
Propane (LP) Tanks
2
Propane (LP)
60 lb. | (2) 30 lb LP tanks w/ auto changeover
Axle Count
7000 lb Dexter Gladiator® thick wall axles w/ upgraded springs & Nev-R-Adjust® brakes
Wheels
17.5 in Wheels
Tires
H-RatedTires
Refrigerator
18 Cu. Ft. residential refrigerator w/ 2000w inverter | 2nd battery disconnect dedicated to residential refrigerator (inverter models)
Storage
Large pass through storage w/ oversized slam latch door
Awnings
Lippert 12V electric patio awning(s) w/ LED lights | 2nd Lippert 12V electric patio awning(s) w/ LED lights
Shower
Outside shower w/ quick disconnect hose
Weight (Dry)
Interior
Beauflor® vinyl flooring throughout | Hardwood decorative slideout fascia | Reflective window shades built into window | Hardwood decorative window frames | Hardwood cabinetry, stiles, & framing | La-Z-Boy Furniture Package | Decorative backlit crown molding in living area, hardwood base molding in hallway and living area | 5K BTU decorative fireplace heater | Central vacuum
Warranty
3-year limited structural warranty | 1-year limited base warranty
TVs
50 in Smart TV & AM/FM/USB stereo w/ JBL® Aura Mizone 3 zone volume control | KeyTV™ multisource signal controller | Wood TV cabinet w/ 32 in SMART LCD TV
Cooktop
Kitchen power vent fan w/ rain sensor
Floorplan
3781RL
Air Conditioner
15K BTU Coleman Mach Quiet Series ducted A/C w/ heat pump main A/C | CX3 package: Triple 15K BTU A/C Package
Furnace
35K BTU furnace
Water Heater
16 gal. gas or electric quick recovery water heater
Power Inverter
Bathroom power vent fan w/ rain sensor
Washer/Dryer
Stackable washer/dryer prep
Beds
King size bed
Safety Features
Breakaway switch | GFI receptacles | CO detector | Smoke detector | Propane gas leak detector | Fire extinguisher
Slides
Tru-fit™ slide construction
Fuel Type
Generator
Generator prep
Fuel Capacity
Carrying: 2,405 lb.
Max Load