2026 Forest River RiverStone 421FK

New Fifth Wheel in Grand Rapids, Michigan, 49548

$149,999.00

New 2026 Forest River RiverStone 421FK available in Grand Rapids, Michigan

2026 Forest River RiverStone 421FK - New Fifth Wheel For Sale by TerryTown RV Superstore in Grand Rapids, Michigan

2026 RiverStone 421FK by Forest River from TerryTown RV Superstore in Grand Rapids, Michigan

Unit Specs

Stock #46282
Year2026
ManufacturerForest River
Make Forest River
ModelRiverStone
Floorplan421FK
Type Fifth Wheel
ConditionNew
Length44' 0"
VIN4X4FRS830T0005210
Price $149,999.00
Need to know your payment? Use our RV Loan Calculator!
Sleeps4
Water Capacity (Fresh)79 gal
Water Capacity (Black)40 gal
Water Capacity (Grey)120 gal
Slideouts6

Looking to buy a 2026 Forest River RiverStone Fifth Wheel RV?

AI Generated Description The Forest River Riverstone 421FK stands out with its 6 slideouts and a total vehicle body length of 540 inches. This towable model carries a GVWR of 24000 lbs, a hitch weight of 3635 lbs, and a dry weight of 18331 lbs, while sleeping up to 4 occupants; hit the open road with confidence. It also offers a Gray Water capacity of 120.0 gal and Black Water capacity of 40.0 gal for extended stays, plus premium build quality and durable interior appointments. View the Forest River Riverstone at TerryTown RV.

This 2026 Forest River RiverStone 421FK is outfitted with all the features you need for happy camping. Ready to be a proud Forest River owner? This 2026 Forest River RiverStone 421FK is the perfect fit. If you’re looking for a family RV, you’ve found it: this rig sleeps 4. This rig cuts no corners on space, expanding into a massive living area with 6 slides. If you’re thinking of heading off grid, this rig has a 79 fresh water tank.

2026 Forest River RiverStone 421FK Features

2026 Forest River RiverStone 421FK Specifications

Dimensions

Height

13' 4"

Length

45' 0"

Width

8' 6"

Weights

Dry Weight

18,331 lbs

GVWR

24,000 lbs

Hitch Weight

3,270 lbs

Payload Capacity

5,669 lbs

Capacities

Refrigerator Capacity

18 cu ft

Sleep Capacity

Water Capacity - Black

40 gal

Water Capacity - Fresh

79 gal

Water Capacity - Grey

120 gal

Exterior

# Awnings

# Axles

# Doors

# Slides

Hitch

Fifth Wheel

Electrical

# A/C

A/C Spec

15,000 BTU High Performance Quiet Cool A/Cs with Heat Pumps

*MFG Specs are for the base unit. Certain options may change specifications listed. Please consult dealer for more details. RVUSA.com cannot guarantee the accuracy of the data presented.