2026 Forest River Sierra 3800RK is a fifth-wheel RV with a rear kitchen floor plan. It has an exterior length of 42 feet 4 inches and three slideouts, providing an expansive living space. It has a dry weight of 12,987 lbs, a hitch weight of 2,360 lbs, and a GVWR of 16,000 lbs. It is designed to sleep up to four people.
The interior features a spacious rear kitchen with a large pantry, a 20 cu. ft. 12V residential refrigerator, a 3-burner cooktop, and an oven. The living area includes a convertible dinette and theater seating. The private front master bedroom has a king-size bed, a large wardrobe, and washer/dryer prep. The full bathroom has a walk-in shower with a seat.
The RV is built on a heavy-duty chassis and features a fiberglass exterior. It comes with a 15,000 BTU A/C and is prepped for a second A/C unit. It has a 69-gallon fresh water tank, a 104-gallon gray water tank, and a 52-gallon black water tank. Other features include a 21-foot power awning with LED lights, a solar prep, and a backup camera prep. It also has a "Four Season" package which includes a heated and enclosed underbelly for extended-season camping.