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New and used 421FK RiverStone by Forest River RV for sale

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New 2025 Forest River RV RiverStone 421FK image
New 2025 Forest River RV RiverStone 421FK
  • $139,999.00
  • PHOENIX, AZ
 View Details
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. 
New 2026 Forest River RV RiverStone 421FK image
New 2026 Forest River RV RiverStone 421FK
  • $159,995.00
  • ADVENTURE MOTOR HOMES
  • GREER, SC
View Details
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. 
New 2025 Forest River RV RiverStone 421FK image
New 2025 Forest River RV RiverStone 421FK
  • $139,999.00
  • PHOENIX, AZ
 View Details
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 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. 
New 2026 Forest River RV RiverStone 421FK image
New 2026 Forest River RV RiverStone 421FK
  • Call for price
  • PHOENIX, AZ
 View Details
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. 
New 2026 Forest River RV RiverStone 421FK image
New 2026 Forest River RV RiverStone 421FK
  • $159,992.00
  • PARRIS RV PAYSON
  • North Payson, UT
View Details
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. 
New 2026 Forest River RV RiverStone 421FK image
New 2026 Forest River RV RiverStone 421FK
  • $159,992.00
  • PARRIS RV MURRAY SOUTH
  • Murray, UT
View Details
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. 
New 2025 Forest River RV RiverStone 421FK image
New 2025 Forest River RV RiverStone 421FK
  • $129,977.00
  • RAMSEY, MN
 View Details
Forest River RiverStone fifth wheel 421FK highlights: Kitchen Island Front Kitchen Theater Seats Dual Vanity Sink Stackable Washer and Dryer   The New 2025 Forest River RV RiverStone 421FK is a luxury fifth wheel built for travelers who want premium comfort, smart design, and uncompromising quality on every journey. With an expansive floorplan, high-end finishes, and thoughtful amenities throughout, this RiverStone model delivers a resort-style travel experience that feels like home — whether you’re parked at your favorite campground or exploring new destinations across the country.   Designed for families, couples, and long-haul adventurers who refuse to compromise on space or comfort, the 421FK offers a perfect blend of functionality and style. From its generous living areas to its upscale kitchen and master suite retreat, this fifth wheel makes every trip a memorable adventure.   Why the Forest River RV RiverStone 421FK Stands Out The RiverStone 421FK stands out with one of the most spacious and versatile floorplans in its class. Step inside to discover a light-filled interior with large windows, thoughtfully arranged living spaces, and residential-style touches that make life on the road feel effortless. The generous front kitchen layout offers abundant counter space, premium appliances, and smart storage, giving you the tools you need to prepare meals with ease.   The living area features comfortable seating, entertainment space, and room for guests or family gatherings, making it ideal whether you’re hosting friends or unwinding after a day of exploring. The master suite offers a private retreat with a comfortable bed, ample wardrobe storage, and carefully designed finishes that elevate your nightly rest.   The RiverStone 421FK also includes practical amenities like ample storage throughout, reliable climate control, and high-quality construction that will stand up to years of travel. Every detail is crafted with thoughtful intention, from durable flooring to elegant cabinetry, ensuring this trailer not only looks great but performs beautifully for years to come.   Reasons to Buy the 2025 Forest River RV RiverStone 421FK Expansive, thoughtfully designed floorplan with generous living space Premium kitchen with high-end appliances and abundant counter space Comfortable master suite with stylish finishes and ample storage Large panoramic windows for natural light and scenic views Multiple living zones ideal for entertaining or relaxing Durable construction and smart storage solutions throughout Designed for extended travel, seasonal use, or full-time living Strong resale value and long-term ownership confidence
New 2025 Forest River RV RiverStone 421FK image
New 2025 Forest River RV RiverStone 421FK
  • $119,977.00
  • RAMSEY, MN
 View Details
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. 
New 2026 Forest River RV RiverStone 421FK image
New 2026 Forest River RV RiverStone 421FK
  • $158,992.00
  • AMARILLO, TX
 View Details
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. 
New 2026 Forest River RV RiverStone 421FK image
New 2026 Forest River RV RiverStone 421FK
  • Call for price
  • TAMPA, FL
 View Details
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. 
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