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Stock Number: 218185
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Condition: New
Exterior Color: BEIGE
Description: New 2026 Forest River RV Sierra 3900HBLR
Details: Forest River Sierra fifth wheel 3900HBLR highlights: Three Slides Entertainment Center Bath and...
Updated: Monday, June 22, 2026 10:58 AM
Location: Anna, Illinois
Seller: Fun Town RV-Cleburne
Stock Number: 217294
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Condition: New
Exterior Color: BEIGE
Description: New 2026 Forest River RV Sierra 3900HBLR
Details: Forest River Sierra fifth wheel 3900HBLR highlights: Three Slides Entertainment Center Bath and...
Updated: Monday, June 22, 2026 10:58 AM
Location: Jackson, Michigan
Seller: Fun Town RV - Jackson
Stock Number: A6070
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Condition: New
Number of Axles: Tandem
Description: New 2026 Forest River RV Sierra 3900HBLR
Details: Forest River Sierra fifth wheel 3900HBLR highlights: Three Slides Entertainment Center Bath and...
Updated: Thursday, June 25, 2026 03:14 AM
Location: Appleton, Wisconsin
Seller: Markquart RV - Appleton
Stock Number: 18068
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Condition: New
Exterior Width: 8 ft
Description: New 2026 Forest River RV Sierra 3900HBLR
Details: Forest River Sierra fifth wheel 3900HBLR highlights: Three Slides Entertainment Center Bath and...
Updated: Thursday, June 25, 2026 07:46 AM
Location: Inez, Texas
Seller: RV Station-Victoria
Stock Number: 82585
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Condition: New
Number of Axles: Tandem
Description: New 2026 Forest River RV Sierra 3900HBLR
Details: Forest River Sierra fifth wheel 3900HBLR highlights: Three Slides Entertainment Center Bath and...
Updated: Monday, June 15, 2026 10:19 AM
Location: Greencastle, Pennsylvania
Seller: Keystone RV Center
Stock Number: 9324
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Condition: New
Exterior Color: White
Description: Introducing the 2026 Forest River RV Sierra, a stunning fifth-wheel that offers an exceptional travel experience with its spacious layout and comfo...
Updated: Sunday, June 14, 2026 06:01 AM
Location: Wabash, Indiana
Seller: Zoomers RV
Stock Number: C1087
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Condition: New
Exterior Color: White
Description: New 2026 Forest River RV Sierra 3900HBLR
Details: TAKE A VIDEO TOUR Forest River Sierra fifth wheel 3900HBLR highlights: Three Slides Entertainme...
Updated: Friday, June 26, 2026 12:21 PM
Location: Clute, Texas
Seller: Camp EZ RV - Clute
Stock Number: N054660
Exterior Length: 42 ft 9 in
Condition: New
Exterior Color: WHITE
VIN: 4X4FSER24TJ054660
Description: Sales_pitch: The RV for sale is a New 2026 Sierra Fifth Wheel by Forest River RV that and much more. This Sierra 3900hblr Fifth Wheel ...
Updated: Friday, June 26, 2026 08:01 AM
Location: Ponchatoula, Louisiana
Seller: Berryland Campers - Ponchatoula
Stock Number: 82022
Exterior Length: 39 ft
Condition: New
VIN: 4X4FSER2XSJ054502
Description: New 2025 Forest River RV Sierra 3900HBLR
Updated: Monday, June 15, 2026 10:19 AM
Location: Salem, Virginia
Seller: Petes RV - Salem
Stock Number: 82145
Exterior Length: 42 ft 9 in
Sleeps: 3
Number of Slide Outs: 3
Condition: New
Number of Axles: Tandem
Description: New 2025 Forest River RV Sierra 3900HBLR
Forest River Sierra fifth wheel 3900HBLR highlights:
Three Slides
Entertainment Center
Bath and a Ha...
Updated: Monday, June 15, 2026 10:19 AM
Location: Chesapeake, Virginia
Seller: Pete's RV - Chesapeake
Stock Number: 219669
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: BEIGE
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: Full and Half Lofts King Bed Walk-In Shower Fr...
Updated: Monday, June 22, 2026 10:58 AM
Location: Conroe, Texas
Seller: Fun Town RV-Conroe
Stock Number: 348072
Exterior Length: 3 ft 7 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Width: 8 in
Description: NEW 2026 FOREST RIVER SIERRA 3990FL – 348072
**Forest River Sierra fifth wheel 3990FL highlights:**
- King Bed
- Front Living Area
- Tw...
Updated: Tuesday, June 23, 2026 04:08 PM
Location: Mesa, Arizona
Seller: General RV Colorado
Stock Number: N055336
Exterior Length: 43 ft 6 in
Condition: New
Exterior Color: WHITE
VIN: 4X4FSES28TJ055336
Description: Sales_pitch: The RV for sale is a New 2026 Sierra Fifth Wheel by Forest River RV that and much more. This Sierra 3990fl Fifth Wheel we...
Updated: Friday, June 26, 2026 08:01 AM
Location: Ponchatoula, Louisiana
Seller: Berryland Campers - Ponchatoula
Stock Number: 220885
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: BEIGE
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: Full and Half Lofts King Bed Walk-In Shower Fr...
Updated: Monday, June 22, 2026 10:58 AM
Location: Anna, Illinois
Seller: Fun Town RV-Cleburne
Stock Number: 219670
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: BEIGE
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: Full and Half Lofts King Bed Walk-In Shower Fr...
Updated: Monday, June 22, 2026 10:58 AM
Location: Rockwall, Texas
Seller: Fun Town RV-Cleburne
Stock Number: FR054855
Condition: New
Description: Elevate your camping experience with the 2026 Forest River Sierra 3990FL! The luxurious front living area boasts deluxe amenities, including plenty...
Updated: Wednesday, June 24, 2026 12:00 PM
Location: Muskogee, Oklahoma
Seller: Rocky Ridge RV - Muskogee
Stock Number: 93398
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: BEIGE
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: King Bed Front Living Area Two Tri-Fold Hide-A...
Updated: Friday, June 26, 2026 10:04 AM
Location: San Antonio, Texas
Seller: Ron Hoover RV & Marine - San Antonio
Stock Number: 87678
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: BEIGE
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: King Bed Front Living Area Two Tri-Fold Hide-A...
Updated: Friday, June 26, 2026 10:04 AM
Location: Texarkana, Texas
Seller: Ron Hoover RV & Marine - Texarkana
Stock Number: 87679
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: BEIGE
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: King Bed Front Living Area Two Tri-Fold Hide-A...
Updated: Friday, June 26, 2026 10:04 AM
Location: Georgetown, Texas
Seller: Ron Hoover RV & Marine - Georgetown
Stock Number: 217297
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: BEIGE
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: Full and Half Lofts King Bed Walk-In Shower Fr...
Updated: Monday, June 22, 2026 10:58 AM
Location: Jackson, Michigan
Seller: Fun Town RV - Jackson
Stock Number: HL6081
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Number of Axles: Tandem
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: King Bed Front Living Area Two Tri-Fold Hide-A...
Updated: Tuesday, June 23, 2026 03:13 AM
Location: Andover, Minnesota
Seller: North Country RV
Stock Number: 82216
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Number of Axles: Tandem
Description: New 2026 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: Full and Half Lofts King Bed Walk-In Shower Fr...
Updated: Monday, June 15, 2026 10:19 AM
Location: Greencastle, Pennsylvania
Seller: Keystone RV Center
Stock Number: 82729
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Exterior Color: BEIGE
Number of Axles: Tandem
Description: New 2025 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: Full and Half Lofts King Bed Walk-In Shower Fr...
Updated: Friday, June 26, 2026 10:04 AM
Location: Slaton, Texas
Seller: Ron Hoover RV & Marine - Lubbock
Stock Number: 81996
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Number of Axles: Tandem
Description: New 2025 Forest River RV Sierra 3990FL
Forest River Sierra fifth wheel 3990FL highlights:
Full and Half Lofts
King Bed
Walk-In Shower
Front ...
Updated: Monday, June 15, 2026 10:19 AM
Location: Salem, Virginia
Seller: Petes RV - Salem
Stock Number: 81646
Exterior Length: 43 ft 6 in
Sleeps: 8
Number of Slide Outs: 5
Condition: New
Number of Axles: Tandem
Description: New 2025 Forest River RV Sierra 3990FL
Details: Forest River Sierra fifth wheel 3990FL highlights: Full and Half Lofts King Bed Walk-In Shower ...
Updated: Monday, June 15, 2026 10:19 AM
Location: Chesapeake, Virginia
Seller: Camper Liquidators-Chesapeake
Stock Number: BB56469
Exterior Length: 43 ft 5 in
Condition: New
VIN: 4X4FSES22VJ055612
Description:
Updated: Friday, June 19, 2026 11:03 PM
Location: Murrieta, California
Seller: Giant RV-Murrieta
Stock Number: FSI199
Exterior Length: 43 ft 5 in
Condition: New
VIN: 4X4FSES23TJ055034
Description: 2026 Forest River Sierra 4002FB The 2026 Forest River Sierra 4002FB is a spacious and residential-style fifth wheel designed for families, guests, ...
Updated: Thursday, June 11, 2026 07:11 PM
Location: Downey, California
Seller: Giant RV-Downey
Stock Number: FSI201
Sleeps: 6
Number of Slide Outs: 4
Condition: New
VIN: 4X4FSES28TJ055479
Description: 2026 Forest River Sierra 4002FB The 2026 Forest River Sierra 4002FB is a large, residential-style fifth wheel designed for families or multi-group ...
Updated: Wednesday, June 03, 2026 03:08 PM
Location: Montclair, California
Seller: Giant RV-Montclair
