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New 2026 Forest River RV RiverStone 421FK

Fifth Wheel

Stock #RS91

Fife, WA

1 of 93

+93

Sale Price: $179,999
Retail Price: $220,987
Save: $40,988

Sleeps 4
6 Slides
Front Kitchen

Kitchen Island

44ft Long
18,786 lbs

See All Specs

Specifications

Sleeps	4	Slides	6
Length	44 ft	Ext Width	8 ft 6 in
Ext Height	13 ft 4 in	Hitch Weight	3635 lbs
GVWR	24000 lbs	Dry Weight	18786 lbs
Cargo Capacity	5214 lbs	Fresh Water Capacity	79 gals
Grey Water Capacity	120 gals	Black Water Capacity	40 gals
Tire Size	17.5"	Furnace BTU	40000 btu
Available Beds	King	Refrigerator Type	French Door with Ice Maker
Refrigerator Size	18 cu ft	Convection Cooking	Yes
Cooktop Burners	4	Number of Awnings	2
Axle Weight	8000 lbs	LP Tank Capacity	40 lbs
Water Heater Type	Truma Aqua Go Comfort On Demand	AC BTU	30000 btu
TV Info	LR 65" Samsung LED Smart TV, BR 40" Smart LED TV	Awning Info	16' Electric with LED Lights
Axle Count	2	Washer/Dryer Available	Yes
Number of LP Tanks	2	Shower Type	Standard
Electrical Service	50 amp	VIN	4X4FRS834T0005243

Description

Forest River RiverStone fifth wheel 421FK highlights:

Kitchen Island
Front Kitchen
Theater Seats
Dual Vanity Sink
Stackable Washer and Dryer

You will feel right at home in this fifth wheel! The rear private bedroom has a 72" x 80" king bed slide for a good night's rest, a rear large wardrobe with the washer and dryer next to it, and even a dresser with a 40" LED TV. And two can get ready at once in the full bathroom with the dual sink vanity. You can then head to either the desk slide to get some work done or whip up some scrambled eggs on the three burner cooktop at the island in the front kitchen. The kitchen even has a dishwasher for easy clean up and two bar stools at the high top dinette that overlooks the middle living area. Relax each night in true comfort on either the E-Z Glide sofa bed slide or the theater seating across from the entertainment center which has a fireplace and 65" Samsung LED Smart TV to watch your favorite movies!

The Forest River RiverStone fifth wheels and toy haulers are luxurious units that have it all! You'll find an automatic six-point hydraulic level-up system to keep your unit in place, and there is preparation for a four-camera observation system. The TravlFi Journey XTR 4G/LTE router and WiFi extender will help you stay connected to the outside world, and you'll never have to overpack again since the Splendid “Astral” stackable washer and dryer will let you clean the small amount of clothes you've brought with you. Another high luxury is the Fischer Paykal dishwasher which will allow you to spend more time enjoying your camp life and less time cleaning up. Each unit is built with a LCI Road Armour suspension system, dual-pane frameless windows, a full docking station, a 200W solar panel, and a BMPro touch control system.

Features

Standard Features (2026)

Standard Interior Package

3.7 CF oven with 4 burner range
Upgraded Calcutta Solid Surface Countertop in kitchen
Large Stainless Steel Kitchen Sinks with Residential-Style Faucet
18 CU. FT. French Door Refrigerator with Ice Maker
Vinyl Flooring
LED Lighting Throughout
30” Stainless Steel Microwave with Convection
Oval Porcelain Toilet with Foot Flush
Cordless Vacuum
40,000 BTU Furnace
10” Thick Memory Foam Mattress 72”x80” Standard
Vinyl Flooring in Slideouts
Day/Night Roller Shades Throughout
5200 BTU Fireplace in Living Room
Solid Surface Sink Covers
Overhead Storage Cabinets in Main Level Living Room
Sofa/Desk Slides
Residential Soft Close Hinges on Cabinet Doors
Soft Close Drawer Glides
Hardwood Dovetail Glides
Under-bed Storage Compartment
Solid Surface Backsplash

Standard Exterior Package

Batten Insulation in Side Walls, Slideouts, Ceiling, and Floors
3/8" Roof Decking
Fiberglass Roof
17.5" H-Rated Cooper Tires with Aluminum Rims
Hydraulic Slideouts on Main Level and Bed Slides
Electric Awning with LED Lights
Side Turning Lights
LCI Road Armour Suspension System
3" Hung Glass Exterior Walls with High Gloss Gel Coat Exterior
Tandem 8,000 lb. Axles / 7,000 lb. Tri-Axles
32" x 78" Entry Door with Friction Hinges
Dual Pane Frameless Windows
12v Heated Full Docking Station
Two 15,000 BTU High Performance Quiet Cool A/Cs with Heat Pumps
12V Powered 50 Amp Cord Reel
Painted Full Front and Rear Fiberglass Caps (N/A 419RD, 42FSKG, 421FK, 425FO – front caps only)
MORryde Entry Step at Main Door
MORryde Safe-T-Rail
Water Manifold System
Composite Slideout Floors
Two Dual 6V or 12V Slide-Out Battery Trays
High Visibility Chrome LED Tail Lights
2" Hitch Receiver for Bike Rack (300 lb. rating) (N/A in Toy Hauler Models)
Dual 40 lb. LP Tanks
Electric Dump Valves
Rivited Fenders

RiverStone Luxury Package (Mandatory)

Automatic 6-Point Hydraulic Level-Up System
Four Camera Observation System Prep
TravlFi Journey XTR 4G/LTE Router & WiFi Extender
Splendide “Astral” Stackable Washer and Dryer
Stained or Painted Hardwood Cabinetry and Stiles Throughout
40" LED TV in Bedroom
12V Heated Holding Tanks
Fisher & Paykel Dishwasher
Ceiling Fan (N/A on 425FO)
Truma Aqua Go Comfort On-Demand Hot Water Heater
LP Generator Prep
BMPro Energy Management System
Tank Sensors Display (Grey, Black and Fresh) Integrated with BMPro Readout
Tire Pressure Sensors
Additional Campside Awning with Weathershield
Two Folding Chairs (N/A 421FK, 42FSKG)

Garage Model Standards

Triple 7,000 lb. Axles
66" x 80" Residential 10" Memory Foam Mattress
MORryde Zero Gravity Ramp Door
110" Deep, 64" Wide, 82" Tall (Bed up position) 58" Tall (Bed down position) Cargo Area (42FSKG)

Ultimate Electronics Package (Mandatory)

65" Samsung LED Smart TV in Living Room (39RKFB, 421FK, 42FSKG)
50-55" Samsung LED Smart TV in Living Room (425FO, 44DBL, 442MC Models)
Klipsch Premium Sound Bar
2,000W Inverter
BMPro Touch Control System
200W Solar Panel with 50Amp MPPT Controller
Pre-Wire Prep for Two Additional Solar Panels

Optional Legacy Package

Full Body Paint
Hydraulic Disc Brakes
3rd High Performance AC w/ Heat Pump
400W Additional Solar 100AH Lithium Battery
LCI Waste Management System

Additional Options

3rd A/C (15,000BTU) with Heat Pump
5.5 Onan Marquis Gold LP Generator
Cadet Wall Mounted Electric Heater in Bedroom
Trail Air 21K Hitch (39RKFB)
Furrion Four Camera System with 7" Monitor Screen—Rear, Side and Main Entry Door Views
Slide Room Awning Toppers with Metal Weather Shields
Two Additional 200W Solar Panels
MORryde Independent Suspension System
Hydraulic Disc Brakes
40" SMART Outside TV
50" SMART Outside TV (42FSKG only)
Queen Bed Suite IPO King Bed Suite
2nd Sofa IPO Desk (39RKFB, 42FSKG, 421FK)
Ceramic Coating
Additional Lithium Batteries (up to 4 Total)
Starlink Kit IPO TravlFI

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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Very knowledgeable, Highly recommend!
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Awesome salesman definitely happy!
Me and my wife have been looking for a RV for a couple weeks now dealing with people that acted like they had no time. I called Art and told him my story and he said come on down and we will help you out. He was a very helpful nice guy and did not make it seem like he was in a hurry and just wanted

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Great customer service!
Shaun Parker was very patient and helpful with us as a picky and uncertain customer

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We are here to help, call us at
253-527-6744 or Contact Us

We are here to help!

253-527-6744
Contact Us
Contact Sales

Fife RV Center is not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes sales tax, registration tags, and delivery fees. Manufacturer pictures, specifications, and features may be used in place of actual units on our lot. Please contact us @253-527-6744 for availability as our inventory changes rapidly. All calculated payments are an estimate only and do not constitute a commitment that financing or a specific interest rate or term is available.

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 Forest River RV RiverStone 421FK

421FK Floorplan

Specifications

Description

Features