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New 2026 Forest River RV Sierra 3800RK

Fifth Wheel

Stock #18415

Donna, TX

1 of 2

MSRP: $100,858

Payments From: $1,597 /mo.

Sleeps 4
4 Slides
Front Bath

Rear Kitchen

44ft Long
12,849 lbs

See All Specs

Specifications

Sleeps	4	Slides	4
Length	44 ft 1 in	Ext Width	8 ft
Ext Height	13 ft 4 in	Hitch Weight	2405 lbs
GVWR	15500 lbs	Dry Weight	12849 lbs
Cargo Capacity	2651 lbs	Fresh Water Capacity	50 gals
Grey Water Capacity	100 gals	Black Water Capacity	50 gals
Tire Size	16"	Furnace BTU	40000 btu
Available Beds	King	Refrigerator Type	12V
Cooktop Burners	3	Number of Awnings	2
Axle Weight	7000 lbs	LP Tank Capacity	30 lbs
Water Heater Capacity	60000 gal	Water Heater Type	On Demand Tankless
AC BTU	30000 btu	TV Info	LR 50" Flat Screen TV
Awning Info	13' & 16' Electric w/LED Light Strip	Washer/Dryer Available	Yes
Number of LP Tanks	2	Shower Type	Shower w/Seat
VIN	4X4FSEP23TJ055107

Description

Forest River Sierra fifth wheel 3800RK highlights:

Four Slides
Theater Seating
Exterior Cooktop
Walk-In Bathroom Closet
12V Refrigerator

If you're looking to go full-time RVing, this fifth wheel is packed with convenient features! The master bedroom includes a king bed slide out with USB ports on either side of the bed so you both can charge your phones, and there is a dresser for your folded clothes. You will love the front bathroom with dual bath sinks, a shower with a seat, plus a walk-in closet with shelves, rods to hand clothes, and baskets for laundry! There is a unique middle utility room with washer and dryer, Washer and dryer counter and a rod to hang clothes that will make a perfect laundry room, or you can utilize this space for storage! Head to the main living area to relax on the theater seating or hide-a-bed sofa, and if you have guests stay over, they can sleep here. There is also an entertainment center with a 50" flat screen TV, but you might just leave that off if you're working at the desk with a chair that is provided. We've saved the best part for last; the kitchen! Here, you'll find ample counter space to prep home-cooked meals, a three burner high output range with a 22" oven, plus a large counter with barstools where you can enjoy breakfast at each morning. Choosing this fifth wheel is a no-brainer!

Each one of these Forest River Sierra fifth wheels are equipped with everything you need to make the most of each adventure! The underbelly armor will protect your unit's vitals from road debris and the painted two tone aerodynamic fiberglass front cap has an improved turning radius to make them easier to navigate. With an electric leveling system, you can set your unit up quick and easy then get to having fun faster than ever. The welded aluminum framed, vacuum bonded laminated superstructure will hold up through every adventure and the cambered powder coated frame comes with rust prohibitor to last longer. Each model also includes the Summit Package that comes with a king Wi-Fi extender system and Olympus antenna, a full coach water filter system, Goodyear tires with 7,000 lb. axles, and the list goes on. The interior is just as impressive with rustic wood plank linoleum, recessed residential lighting, a memory foam mattress, and mocha accent crown molding over the kitchen cabinets!

Features

Standard Features

Exterior Features

Automatic Electric Level-Up System
2" Towing and Accessory Hitch (Where Available)
7,000lb axles with Anti-lock Braking System
Goodyear Radial Tires w/ anti-lock brakes
Lippert auto adjust brakes
GoPower 200W roof mounted solar panel with controller and battery
Quad MORryde® step above with strut (Where Available)
Color matched high gloss gel coated colored exterior fiberglass
Painted two tone aerodynamic fiberglass front cap with improved turning radius
Underbelly Armor
TST Tire Pressure Monitoring System
Enclosed and heated dump valves
16" Spare tire kit
Large tinted windows with 80/20 UV prohibitor
Electric awning with LED light strip
Prepped for Lippert On-The-Go Ladder
Power front jacks with spring loaded pins
Automotive-style fender skirts
Hitch light
Porch light with interior switch
30 lb. double LP tanks with auto change over
Rain gutters with extra long drip spouts (Prevents black streaking)
Insulated heavy duty slam lock baggage doors
Exterior foldable grab handle
Unobstructed pass through storage area
Upgraded aluminum rims
Oversized friction hinge entry door
Exterior LP Quick Connect with Grill/Griddle Cooktop

Interior Features

Solid Surface Kitchen Counter tops
Fiberglass one-piece shower with folding teak seat
Washer and Dryer Prep
6' 4" slide-out height
Stainless steel kitchen package
Beachside sundance linoleum
Hidden hinged, soft close drawers and cabinets
Full extension ball bearing drawer guides
Stainless steel under mounted kitchen sink
Trash receptacle in kitchen
Decorative backsplash
Two color coordinated interiors
LED lighting throughout
Recessed residential lighting
Accent lighting over dinette
Extra large, panoramic picture windows throughout
Vented side windows in slide-outs
TV antenna with booster
Solid wood drawer fronts with birch sides
Solid wood, square inset cabinet doors, painted or wood grain
Bedroom slide-out fascia
Memory foam mattress
Teddy Bear® bunk mats
50" flatscreen smart TV
JBL Aura Cube FM/Bluetooth media center
Designer window treatment
Ceiling fan
Tri-fold hide-a-bed sofa
Quilted bedspread

Appliances/Systems

Dual ducted 15k BTU Air Conditioners, prepped for 3rd 15k BTU A/C
17 cu. ft. 12V refrigerator
60,000BTU On Demand Tankless Water Heater
40,000BTU furnace
Heated Holding Tanks (12V)
Floor ducted 40,000BTU furnace
30" OTR stainless steel microwave
Chef collection 3 burner / 24" oven with drawers
Interior monitor panel for holding tanks
Satellite and cable hookup with RG-6 cable for high quality picture
Porcelain foot flush toilet(s)
65 Amp converter
Power fan in Kitchen and Bathroom(s)
Full coach water filtration system

Construction

Welded aluminum-framed, vacuum bonded laminated superstructure
5/8" tongue and groove plywood floor decking
2 x 3 floor joists, 12" on center
Laminated sidewalls
3/8" roof decking (Full walk-on roof)
Cambered powder coated frame with rust prohibitor
Underbelly armor
5" truss roof rafters
R-10, 2" sidewall construction
Laminated slide-out walls

For Your Safety

Smoke alarm
Fire extinguisher
Breakaway switch (Battery hook-up required)
Dead-bolt lock on entry door
LP/CO2 gas detector
Fire escape windows

Popular Options

Free Standing Dinette in place of Booth (3550BH only)
Two chairs in place of ottoman bench
Central vacuum
Slide room awnings (N/A dinette slides)
Washer and Dryer

Polar Tech Package (Optional)

Dual pane windows
3rd AC power saver direct dump system w/ wall thermostat

Summit Package

Electric Auto Leveling System
Goodyear Tires with 7,000 lb axles
2" Rear Receiver Hitch and 4-Pin Connector (Where Available) (NA 4002FB and 3990FL)
Two 15,000BTU Air Conditioners
Power fan in Kitchen and Bathroom(s)
Anti-lock Braking System
Tire Pressure Monitoring System
60,000BTU On Demand Tankless Water Heater
BoonDocker Solar System-200W Panel with controller & battery
MORryde Steps with Strut (Where Available)
Heated and Enclosed Holding Tanks (12V pads)
Washer and Dryer Prep
King Wi-Fi Extender System and Olympus Antenna
Underbelly Armor
Soft Close Residential Drawers & Cabinets Throughout
50" Flat Screen smart TV
4 Camera Security Prep with Back-Up Camera prep
Full Coach Water Filter System
Enclosed, One-Piece Docking Station
Color Matched Gel coated Fiberglass Exterior
Aerodynamic Two Tone Fiberglass Painted Front Cap with Lights
High Efficiency Radiant Foil (Roof and Floor)
Spare Tire

Chef's Kitchen Package

16 cu. ft. Stainless Refrigerator (12V)
Stainless Range with Cast Iron Grates
Solid Surface Countertops
Stainless Apron Sink with Strainer
Commercial Style Kitchen Faucet
30" Over-the-Range Stainless Microwave
Countertop Extension
Designer Backsplash

Please 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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New 2026 Forest River RV Sierra 3800RK

3800RK Floorplan

Specifications

Description

Features