2026 Forest River RiverStone 421FK

NewFifth wheel|Stock #RS05285|Located at MY RV in El Cajon, CA
$149,992$220,102
Save $70,110

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.

Specifications

Length

45 ft

Dry weight

18,331 lbs

Sleeps

4 people

Slideouts

5

Unit features & options

  • 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
  • Batten Insulation in Side Walls, Slideouts, Ceiling, and Floors
  • 3/8" Roof Decking

Full specifications

AC BTU30000 btu
Available BedsKing
Awning Info16' Electric with LED Lights
Axle Count2
Axle Weight8000 lbs
Black Water Capacity40 gals
Cargo Capacity5214 lbs
Convection CookingYes
Cooktop Burners4
Dry Weight18786 lbs
Electrical Service50 amp
Ext Height13 ft 4 in
Ext Width8 ft 6 in
Fresh Water Capacity79 gals
Furnace BTU40000 btu
GVWR24000 lbs
Grey Water Capacity120 gals
Hitch Weight3635 lbs
LP Tank Capacity40 lbs
Length528 ft
Number of Awnings2 ft
Number of LP Tanks2
Refrigerator Size18 cu ft
Refrigerator TypeFrench Door with Ice Maker
Shower TypeStandard
Sleeps4
Slides6
Solar Wattage200 watts
TV InfoLR 65" Samsung LED Smart TV, BR 40" Smart LED TV
Tire Size17.5"
Washer/Dryer AvailableYes
Water Heater TypeTruma Aqua Go Comfort On Demand

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2026 RiverStone 421FK

2026 RiverStone 421FK
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