2026 FOREST RIVER SIERRA 3800RK

Introducing the 2026 Forest River Sierra 3800RK – a rear kitchen fifth wheel that blends upscale residential design with rugged durability for the ultimate in extended-stay comfort and road-ready performance. With standout luxury, best-in-class features, and unmatched build quality, this coach is ready to impress both full-timers and weekend warriors.

At 44’1” in length, the Sierra 3800RK boasts an expansive layout with a rear chef’s kitchen that rivals upscale homes. Prepare meals with ease on the stainless steel range with cast iron grates, framed by solid surface countertops, a designer backsplash, and a 30" over-the-range microwave. A 16 cu. ft. 12V stainless refrigerator keeps your ingredients fresh while a commercial-style kitchen faucet and apron front stainless sink with strainer add both form and function. Bonus: a countertop extension gives you even more prep space.

Relax in the spacious living area with a 50" flatscreen smart TV, soft close drawers and cabinets, and residential-quality finishes. With two whisper-quiet 15,000 BTU A/Cs, heated and enclosed tanks, and a 60,000 BTU tankless on-demand water heater, comfort follows you year-round.

Storage is no issue thanks to unobstructed pass-through compartments, slam-latch baggage doors, and massive interior cabinetry. Washer/dryer prep adds long-term convenience for extended travel or full-time living.

Engineered for adventure, this Sierra is built on 7,000 lb axles with Goodyear radial tires and anti-lock brakes, paired with Lippert’s auto-adjust braking system and an Automatic Electric Level-Up System for smooth setup. The 2” rear receiver hitch, 4-pin connector, and towing accessory hitch (where available) boost versatility.

The Boondocker Solar System with a 200W GoPower panel, controller, and battery means you're prepped for off-grid stays, while the King Wi-Fi extender and Olympus antenna keep you connected.

• Two-tone painted aerodynamic front cap with improved turning radius

• High-gloss gel-coated fiberglass sidewalls

• Dual electric awnings with LED light strips for expanded shade

• TST Tire Pressure Monitoring System for added safety

• Quad MORryde® step above entry steps with strut assist

• Heavy-duty exterior grab handle and oversized friction hinge door

• Prepped for Lippert On-The-Go ladder and 4-camera security system

• Exterior LP quick connect with grill/griddle cooktop included

• Full coach water filtration system

• Rain gutters with extra-long drip spouts to prevent streaking

• High-efficiency radiant foil insulation in roof and floor

• Power front jacks with spring-loaded pins

• Spare tire included

• GVWR: 15,500 lbs

• UVW: 12,849 lbs

• CCC: 2,651 lbs

• Hitch Weight: 2,405 lbs

• Fresh Water: 50 gal

• Gray Water: 100 gal

• Black Water: 50 gal

Whether you’re chasing mountain views or cross-country memories, the 2026 Sierra 3800RK delivers high-end luxury, rugged utility, and forward-thinking tech all in one stunning fifth wheel. Your next chapter starts here.