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New 2026 Keystone RV Montana 3857BR

Fifth Wheel

Stock #PVATO26KM3857BR

Prescott Valley, AZ

NEW 2026 MODEL — AVAILABLE NATIONWIDE at UNBEATABLE Prices! This RV may be in transit, on order, or available at one of our 50+ Campers Inn RV locations. Inquire today for current availability and pricing!

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Specifications

Sleeps	8	Slides	4
Length	40 ft 11 in	Ext Height	13 ft 5 in
Interior Color	OAKMONT, WOODCLIFF	Exterior Color	Volcano, Cobalt, Sterling, Glacier Full-Body Paint Choices
Hitch Weight	3050 lbs	Dry Weight	14668 lbs
Cargo Capacity	2382 lbs	Fresh Water Capacity	70 gals
Grey Water Capacity	88 gals	Black Water Capacity	49 gals
Tire Size	ST235/80R16G	Furnace BTU	35000 btu
Number Of Bunks	1	Available Beds	King
Refrigerator Type	Residential w/ Ice maker	Refrigerator Size	18 cu ft
Convection Cooking	Yes	Cooktop Burners	3
Shower Size	30" x 48"	Number of Awnings	2
Axle Weight	7000 lbs	LP Tank Capacity	30
Water Heater Capacity	16 gal	Water Heater Type	Gas/Electric Quick Recovery
AC BTU	45000 btu	TV Info	LR 50" Smart TV, BR 32" LCD TV
Awning Info	10' & 16' Electric with LED Lights	Axle Count	2
Number of LP Tanks	2	Shower Type	Standard
Electrical Service	50 amp

Description

Keystone Montana fifth wheel 3857BR highlights:

Middle Bunkroom
Loft
Kitchen Island
Rear Living Area
Residential Power Recliners
Outdoor Kitchen

Everyone will have a comfortable place to sleep with a front private bedroom and a middle bunkhouse in this fifth wheel! The front private bedroom has a king bed slide with storage underneath, a dresser with a 32" Smart TV, and two closets with additional storage. The mid-bunk room/bonus room has a hide-a-bed sofa with flip-up bunk above across from a desk so you can get some work done while you're away, plus a loft area/attic space above it all with a ladder to access it. The full bathroom has a 48" x 30" fiberglass shower with a seat and skylight above, and a linen closet to keep your towels close. The chef can prepare delicious home cooked meals for everyone either indoors with the 24" range and convection microwave oven, or at the outdoor kitchen with a two burner cooktop and refrigerator to keep your drink nice and cold!

Enjoy luxury, innovation, and the outdoors in any one of Montana's finest fifth wheels. Each set the standard with exceptional features, and exciting factory installed options to provide you a great home on the road. Keystone's 12" I-beam chassis with z-frame technology provides a strong and durable foundation to your fifth wheel, and the four season living package will help extend your camping season. A few other construction features you will appreciate include a MORryde CRE3000 suspension, a fully walkable roof with an alpha seamless TPO membrane system, and 4k square frameless tinted safety glass windows. Each feature stylish interiors with two decor choices paired with beautiful hardwood cabinetry, Beauflor vinyl flooring throughout, central vacuum, plus a La-Z-Boy furniture package for all-around comfort!

Call TODAY for building & pricing your New Custom Order Fifth Wheel.

*All calculated monthly payments are an estimate for qualified buyers only and do not constitute a commitment that financing or a specific interest rate or term is available. Financing terms may not be available in all Campers Inn Company locations. Campers Inn RV Sales is not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes freight, sales tax, registration tags, and delivery fees. Manufacturer pictures, specifications, and features may be used in place of actual inventory in stock on our lot. Please contact us for availability as our inventory changes rapidly. Manufacturer and/or stock photographs may be used and may not be representative of the particular unit being viewed. Where an image has a stock image indicator, please confirm specific unit details with your dealer representative.

Features

Standard Features (2026)

PLEASE NOTE: Features and options separated by models below

-------------------------------------------------------------------

3100RL, 3800FL, 3900RK

Exterior

12" I-beam w/ z-frame technology
Helux Pin Box
2" thick composite backed high gloss fiberglass sidewalls and insulated rear wall
4k Square Frameless tinted safety glass windows
Dual pane frameless windows w/ safety tint (optional)
Fiberglass 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
Curt TCS (Touring Coil Spring) 8K Axles
Curt ABS (Anti-Lock Braking System)
17.5" Wheels
H-Rated Tires
TPMS Prep
6' 6" tall 30" wide entry door w/ screen & friction hinge
4 Step entry steps w/ strut assist
Large pass-through storage w/ oversized slam latch door
Premium oversized steel slide out storage tray
Slide Out rear Gear Storage Trays.
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
Generator prep (optional)
RVMP Flex Power 5500 Generator (optional)
LP generator (optional; select models)
Seamless roto-cast holding tanks
50 Amp Power Cord Reel
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
Slide-out awning package (optional)
3000 lb. towing hitch
MORryde® Independent Suspension System (optional)
MORryde® Safe-T-Rail door handle
Lippert Titan™ leveling system w/ touch screen and underlights
12V distribution Giggy Box™
Frontier Gold full body paint (optional)

Interior

Hardwood decorative slideout fascia
Reflective window shades built into window
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
SBC V-Flow Max Cordless Vacuum

Keystone Exclusives

Color-coded unified wiring standard
4G LTE and Wi-Fi prep
Tuf-Lok™ thermoplastic duct joiners
KeyTV™ multisource signal controller
In-floor heating ducts
Tru-fit™ slide construction
Blade Pure™

Kitchen Features

Full extension ball bearing drawer glides, hidden cabinet hinges
Solid Surface Backsplash
Solid surface kitchen countertops
Solid Surface waterfall island
Oversized deep stainless-steel sink with attachments
High-rise pull down faucet
Adjustable Sliding "Deskette" w/ 4 chairs
Flush floor slideout(s)

Appliances & Utilities

(2) 40 lb. LP tanks w/ auto changeover
18K Furrion Chill Cube Main A/C with heat pump
13.5 K Furrion AC for 2nd and 3rd ACs
Starlink Prep
35K BTU furnace
60K BTU Suburban on Demand Water Heater
55" 4K Smart TV and JBL 2.1 Soundbar and Subwoofer
20 Cu. Ft. 12V refrigerator
18 Cu. Ft. residential refrigerator w/ 2000w inverter (optional)
Residential size stainless steel convection microwave
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

60" x 80" full size queen bed (Optional)
King size bed
Adjustable stem reading lights
USB & 110V outlets bedside
Foam mattress & decorative bedspread/pillow package
40" 4K Smart TV in Bedroom
Built In jewelry center with hamper

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

Legacy Edition Package (Optional)

Furrion Vision S side & rear observation system
Electric power cord reel
Electric dump valves

----------------------------------------------------------------------

Dealer Stock Only Models: 3123RL, 3231CK, 3531RE, 3532SP, 3623EB, 3761FL, 3781RL, 3795FK, 3857BR, 3901RK, 3915TB, 3941FO

Features may vary by model; see dealer for more details

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
Dual pane frameless windows w/ safety tint (optional)
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 (8,000 lb. axles on select models)
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
Generator prep (optional)
LP generator (optional)
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
Slide-out awning package (optional)
3000 lb towing hitch
MORryde® Independent Suspension System (optional)
MORryde® Safe-T-Rail door handle
Lippert Titan™ leveling system w/ touch screen and underlights
12V distribution Giggy Box™
Volcano full body paint (optional)
Cobalt full body paint (optional)
Sterling full body paint (optional)
Glacier full body paint (optional)

Interior

Hardwood decorative slideout fascia
Reflective window shades built into window
Hardwood decorative window frames
Beauflor® vinyl flooring throughout
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

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

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 (select models)
(2) 30 lb LP tanks w/ auto changeover (select models)
Starlink Prep
15K BTU Coleman Mach Quiet Series ducted A/C w/ heat pump main A/C
35K BTU furnace
CX3 package: Triple 15K BTU A/C Package
60K BTU Suburban on Demand Water Heater
55" 4K Smart TV and JBL 2.1 Soundbar and Subwoofer
16 gal. gas or electric quick recovery water heater
50" Smart TV & AM/FM/USB stereo w/ JBL® Aura Mizone 3 zone volume control
20 Cu. Ft. 12V refrigerator (optional)
18 Cu. Ft. residential refrigerator w/ 2000w inverter
Residential size stainless steel convection microwave
24" Furrion freestanding 4-burner range with 3.7 Cu Ft Oven
Stackable washer/dryer prep
24" Furrion Stove w/ Matching stainless Steel Drawer
Pendant style island light w/ ceiling treatment (select models)

Bedroom

60" x 80" full size queen bed (optional)
King size bed
Adjustable reading lights
USB & 110V outlets bedside
Foam mattress & decorative bedspread/pillow package
Adjustable stem reading lights w/ night light function
40" 4K SMART TV in Bedroom
Wood TV cabinet w/ 32" SMART LCD TV

Bathroom

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

Legacy Edition Package (optional)

Furrion Vision S side & rear observation system
Dexter® disc brakes
Electric power cord reel
Surge protector
Winegard 4G gateway router
Rear fiberglass cap
Electric Dump Valves
Starlink Standard Kit w/ panel installed on roof

See us for a complete list of features and available options!

All standard features and specifications are subject to change.

All warranty info is typically reserved for new units and is subject to specific terms and conditions. See us for more details.

Due to the current environment, our features and options are subject to change due to material availability.

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Please contact the Little Dealer Little Prices near you for availability as our inventory changes rapidly. Little Dealer Little Prices strives for accurate website information but is not responsible for misprints, typos, or errors on our website. Manufacturer or sample photos and specifications may be used in place of actual unit photos and specs. Monthly payments are an estimate only and do not constitute a commitment that financing or a specific interest rate or term is available. Prices exclude taxes, PDI, documentation and delivery fees, destination charges and fees. This offer expires when this information changes or the stock number is sold.

Manufacturer and/or stock photographs may be used and may not be representative of the particular unit being viewed. Where an image has a stock image indicator, please confirm specific unit details with your dealer representative.

New 2026 Keystone RV Montana 3857BR

3857BR Floorplan

Specifications

Description

Features

Why Do We Ask You For This Information?