Rear window
Get in touch and we'll be happy to answer any questions or set up an appointment to see it in person.
2026 Forest River Sierra 3370RLS
NewStock #N1082
Listing price
2026 Sierra 3370RLS
Other floor plans with a similar body style, feature mix, and price range, prioritizing other manufacturers and brands.
Length
36 ft 4 in
Dry weight
10,319 lbs
Sleeps
4
Slideouts
3
The 3370RLS puts the living room in the rear, anchored by a large rear window and a 50" smart TV that faces the couch, a layout that genuinely changes how the space feels day-to-day. Up front, a King bed slide anchors the bedroom, and washer/dryer prep (with an optional install) means this one is set up for longer stays. The kitchen punches above its class with a full island, solid surface countertops, a stainless undermount sink, and a hidden pantry tucked behind hinged cabinetry. Dual 15k BTU ducted A/C units, 200W of roof-mounted solar, and automatic leveling round out a package that's as ready for full-time comfort as it is for a seasonal trip.
Many factors play into a unit's listing price and what you should pay. This guide provides a ballpark estimate, but it does not factor in your exact scenario or how different listings are equipped.
There may be room for price negotiation.
Unlock pricing insights with RV Envy Pro →$48,699 – $68,995
This unit has been on the lot longer than 120 days.
When was this unit listed?This unit ranks near the lowest priced for new units in this model year.
From the dealer's listing
The New 2026 Forest River Sierra 3370RLS is a premium rear-living fifth wheel designed for couples who want a spacious, comfortable RV for weekend getaways, extended road trips, and longer stays. With three slide-outs, a king-size bed, large kitchen island, rear living area, theater seating, tri-fold hide-a-bed sofa, washer/dryer prep, and two power awnings, the Sierra 3370RLS delivers the comforts you want for life on the road.
Available at Bobby Combs RV Centers in Caldwell, Idaho, this Sierra fifth wheel is an excellent choice for RV shoppers throughout Caldwell, Nampa, Boise, Meridian, Eagle, Kuna, Star, Middleton, Greenleaf, Canyon County, the Treasure Valley, and surrounding Southwest Idaho communities. Bobby Combs RV Centers currently lists the New 2026 Sierra 3370RLS in its Caldwell inventory.
Bobby Combs RV
Caldwell, ID
Sells faster than 15% of US RV dealers
Compared with 1,318 dealers nationwide
Other listings for this floor plan, ranked by condition, model year, distance, price, and listing quality.
The listing price on this unit has changed 3 times.
The Sierra 3370RLS fifth wheel features a traditional rear-living floorplan designed around comfort and relaxation. Three slide-outs dramatically expand the interior, creating an open living environment that is ideal for couples and entertaining guests.
The rear living area features theater seating, a tri-fold hide-a-bed sofa, ceiling fan, Smart TV, and JBL Bluetooth media center, giving you a comfortable space to relax after a day of traveling, hiking, fishing, or exploring.
The kitchen is one of the highlights of the 2026 Sierra 3370RLS. The large island provides additional workspace and doubles as a convenient gathering area when you're entertaining.
Kitchen features include solid-surface countertops, stainless-steel appliances, a 16 cu. ft. 12V refrigerator, 30" over-the-range microwave, and Chef Collection 3-burner range with a 24" oven. Hidden-hinged soft-close cabinetry and full-extension ball-bearing drawer guides add functionality and storage.
Whether you're preparing a quick breakfast before heading out or cooking dinner for friends at the campground, the 3370RLS is designed to make meals on the road feel more like home.
At the front of the Sierra 3370RLS, the private bedroom provides a comfortable retreat. The king-size bed is positioned on a slide-out, creating additional floor space and helping make the bedroom feel open and comfortable.
The bedroom also features a memory foam mattress, bedroom slide-out fascia, quilted bedspread, and generous storage, while the walk-in closet provides additional room for clothing and personal belongings. The floorplan is also washer/dryer prepped, making it particularly well suited for extended RV travel.
The bathroom features a fiberglass one-piece shower, porcelain foot-flush toilet, power fan, and convenient storage. The shower design and residential-inspired interior make the bathroom comfortable for weekend trips as well as longer stays.
The 2026 Sierra 3370RLS combines comfort with features designed for RV travel. Standard equipment includes a high-gloss gel-coated fiberglass exterior, laminated sidewalls, full walk-on roof, 5/8" tongue-and-groove DryMax OSB floor decking, 5" truss roof rafters, R-10 sidewall construction, and laminated slide-out walls.
Outside, the Sierra includes automatic electric leveling, Goodyear radial tires with anti-lock brakes, tire pressure monitoring, underbelly armor, pass-through storage, power front jacks, upgraded aluminum rims, and two electric awnings with LED lighting.
The Sierra 3370RLS is equipped for comfortable camping in a variety of conditions. A 200W roof-mounted Rich Solar panel with controller and battery provides added off-grid capability, while the 60,000 BTU on-demand tankless water heater supplies hot water as needed.
Dual ducted 15,000 BTU A/C units help maintain a comfortable interior, with the coach prepped for a third A/C. A 40,000 BTU furnace and heated holding tanks add cold-weather convenience.
Forest River lists the 2026 Sierra 3370RLS at 36' 4" long, 10,319 lbs. UVW, 13,560 lbs. GVWR, 3,241 lbs. cargo capacity, and 1,560 lbs. hitch weight. Actual weights and capacities can vary by individual unit and installed equipment.
If you're searching for a new luxury fifth wheel, 2026 Sierra 3370RLS for sale, rear-living fifth wheel, or a premium fifth wheel for couples, the 3370RLS offers an excellent combination of livability, storage, technology, and upscale features.
The combination of three slide-outs, king bedroom, kitchen island, theater seating, fireplace-style entertainment area, washer/dryer prep, solar package, tankless water heater, and dual A/C makes the Sierra 3370RLS a versatile choice for weekend campers and RVers planning longer adventures.
Looking for a Sierra 3370RLS near Boise, Idaho? Shop the New 2026 Forest River Sierra 3370RLS at Bobby Combs RV Centers in Caldwell, Idaho.
Bobby Combs RV Centers serves RV shoppers throughout:
Whether you're searching for a Sierra fifth wheel in Caldwell, a luxury fifth wheel near Boise, or a new RV near Nampa or Meridian, Bobby Combs RV Centers is your local destination for new and used RVs.
Bobby Combs RV Centers offers more than RV sales. The Caldwell dealership also provides RV service, repairs, parts, and accessories, helping RV owners keep their campers ready for their next adventure.
