2026 Forest River RiverStone 421FK

NewFifth wheel|Stock #112240|Located at Campers Inn RV in Seffner, FL
$159,997$219,956
Save $59,959

Experience residential luxury on the road like never before with the new 2026 Forest River RiverStone 421FK—a full-profile fifth wheel designed for those who refuse to compromise on comfort, space, or high-end features. Whether you're planning extended stays, full-time RV living, or upscale weekend escapes, this front-kitchen masterpiece delivers a true home-away-from-home experience.

From the moment you arrive, the RiverStone 421FK makes a bold impression with its impressive 44-foot length, six slide-outs, and high-gloss fiberglass exterior. Built for durability and four-season travel, it features insulated walls, dual-pane windows, a heated underbelly, and a powerful climate system to keep you comfortable wherever your journey takes you.

Step inside and you’ll be welcomed by a stunning residential-style interior that blends elegance with functionality. The front kitchen layout is a standout feature, offering an expansive cooking space that rivals many traditional homes. With solid surface countertops, a large kitchen island, stainless steel appliances, a 4-burner range with oven, convection microwave, and an 18 cu. ft. French door refrigerator, you’ll have everything you need to cook, entertain, and enjoy life on the road.

The central living area is designed for relaxation and entertaining, featuring plush seating, a large entertainment center, and a cozy fireplace that creates a warm, inviting atmosphere. High-end touches like hardwood cabinetry, soft-close drawers, LED lighting, and premium finishes elevate the entire space, making it feel like a luxury condo rather than an RV.

Head to the rear master suite and discover your own private retreat. With a king-size bed, spacious wardrobe, washer and dryer, and a beautifully appointed bathroom, this area is built for comfort and convenience during long trips or full-time living. A memory foam mattress and thoughtful storage solutions ensure restful nights and organized living.

This RiverStone is loaded with premium features designed to make every trip easier and more enjoyable, including:

Automatic 6-point hydraulic leveling system for quick setup

Dual high-performance A/C units with heat pumps for year-round comfort

Dishwasher and residential appliances for added convenience

Heated holding tanks and advanced insulation for extended-season camping

50-amp service and modern tech features including WiFi prep and smart TVs

MORryde suspension and entry system for smoother towing and safer access

The exterior is just as impressive, with dual power awnings, ample storage, and a durable construction built for long-term reliability. Whether you're parked at a resort, exploring national parks, or setting up a seasonal site, the 421FK provides both style and substance.

Choosing a new 2026 Forest River RiverStone 421FK means investing in a luxury fifth wheel that offers exceptional

Specifications

Length

45 ft

Dry weight

18,331 lbs

Sleeps

4 people

Slideouts

5

Full specifications

Available BedsKing
Axle Count2
Black Water Capacity40 gal
Class:Fifth Wheel
Cooktop Burners4
Dry Weight18,786 lbs
Dry Weight:18,786
Electrical Service50 amps
Exterior Height13 ft 4in
Exterior Width8 ft 6in
Fresh Water Capacity79 gal
Furnace BTU40,000
Grey Water Capacity120 gal
Gross Weight24,000 lbs
Length:0 ft
Number of Awnings2 ft
Pin Weight3,635 lbs
Refrigerator Size18
Refrigerator TypeFrench Door with Ice Maker
Shower TypeStandard
Sleeps:4
Slides:4
TV InfoLR 65"" Samsung LED Smart TV, BR 40"" Smart LED TV
Tire Size17.5
Washer/Dryer AvailableYes

Get more info

2026 RiverStone 421FK

2026 RiverStone 421FK
I'm interested in
Preferred contact method
EmailPhone callText message

We'll add you to our weekly newsletter too, but you can unsubscribe at anytime.