2026 Forest River Sierra 3800RK

New Fifth Wheel in Montclair, California, 91763

Get Sale Price!

Show All 38 Photos

New 2026 Forest River Sierra 3800RK available in Montclair, California

2026 Forest River Sierra 3800RK - New Fifth Wheel For Sale by Giant RV in Montclair, California

2026 Sierra 3800RK by Forest River from Giant RV in Montclair, California

Unit Specs

Stock #FSI184
Year2026
ManufacturerForest River
Make Forest River
ModelSierra
Floorplan3800RK
Type Fifth Wheel
ConditionNew
Length44' 1"
VIN4X4FSEP20TJ054822
MSRP $101,193.05
Sale Price Get Sale Price!
Need to know your payment? Use our RV Loan Calculator!
Water Capacity (Fresh)50 gal
Water Capacity (Black)50 gal
Water Capacity (Grey)100 gal
Slideouts4

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

2026 Forest River Sierra 3800RK

Get ready for gourmet living with the 2026 Forest River Sierra 3800RK Fifth Wheel at Giant RV in California, a 44’1” luxury RV sleeping up to 4, featuring a rear kitchen with a 16.8 cu. ft. fridge, a front queen bedroom, a slide-out with theater seating, and a full bath to refresh. With four slide-outs and dual 15,000 BTU A/C, it’s built for epic California RV camping!

Front Bedroom: Queen bed slide for luxury camping comfort
Rear Kitchen: 16.8 cu. ft. fridge, cooktop for RV adventure
Central Living Area: Theater seating slide for California RV
Central Bathroom: Walk-in shower for RV camping

View a video of this 2026 Forest River Sierra 3800RK RV on YouTube!

2026 Forest River Sierra 3800RK Features

2026 Forest River Sierra 3800RK Specifications

Dimensions

Height

13' 4"

Length

44' 1"

Width

8' 0"

Weights

Dry Weight

12,849 lbs

GVWR

15,500 lbs

Hitch Weight

2,405 lbs

Payload Capacity

2,651 lbs

Capacities

Refrigerator Capacity

16 cu ft

Sleep Capacity

Water Capacity - Black

50 gal

Water Capacity - Fresh

50 gal

Water Capacity - Grey

100 gal

Exterior

# Awnings

# Axles

# Doors

# Slides

Hitch

Fifth Wheel

Electrical

# A/C

A/C Spec

Dual ducted 15k BTU Air Conditioners, prepped for 3rd 15k BTU A/C

*MFG Specs are for base unit. Certain options may change specifications listed. Please consult dealer for more details. Data is provided by a 3rd party. RVUSA.com cannot guarantee the accuracy of the data presented.