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2026 Keystone Avalanche 366LS
NewStock #KS2073
Listing price
2026 Avalanche 366LS
Other floor plans with a similar body style, feature mix, and price range, prioritizing other manufacturers and brands.
The Keystone Avalanche 366LS puts the kitchen at the back where it belongs in a layout this size, opening up the living area and giving the whole rig a roomy, residential feel. The 100" wide body construction and 6'10" tall summit slides make a real difference day-to-day, and details like a Girard on-demand tankless water heater, solid surface countertops, and a Furrion refrigerator with ice maker push it firmly into the full-timer category. A King bed, dual Coleman-Mach 15K BTU air conditioners, and the Polar Pack four-season climate package mean the Avalanche 366LS is set up for comfort in more than just mild weather. The Lippert Titan hydraulic auto-leveling system with its digital touchscreen takes the headache out of setup, and stackable washer and dryer prep keeps long-term convenience on the table.
Length
40 ft 10 in
Dry weight
14,027 lbs
Sleeps
5
Slideouts
5
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.
$69,997 – $84,995
This unit is ranked 3 of 4 by asking price in this group.
Mountaineer RV
Jane Lew, WV
Sells faster than 100% of West Virginia RV dealers
Compared with 6 dealers in West Virginia
Keystone Alpine Avalanche Edition fifth wheel 366LS highlights:
Five Slides
King Bed
Free-Standing Dinette
Largest L-Shaped Sofa
Desk with a Chair
This rear kitchen fifth wheel makes extended stays or weekend trips to the lake enjoyable! The chef of your group will find plenty of counter space with the included kitchen island, plus there is a pantry and 18 cu. ft. residential refrigerator for food storage. A free-standing dinette provides a place to dine together, and the largest L-shaped sofa with recliners will be the perfect spot to relax with a movie. If you have guests, they could sleep here or on the hide-a-bed sofa sleeper. The dual entry bath includes a shower with a seat for added comfort, and the front master bedroom will feel just like home with its king bed slide out and master closet. There is also a dresser and stackable washer and dryer prep if you want to add those appliances!
With any Keystone luxury Alpine Avalanche Edition fifth wheel, you will experience wide-body construction that allows you to stretch out and stay awhile during any season thanks to the Polar Pack All Season Protection that includes a heated and enclosed underbelly, an Astro foil reflective layer on the roof, front and rear walls, and two static attic vents, plus more! The interior offers hardwood slide out fascia with wood accents, d****esigner upholstered window valances with custom wood window frame, plus your choice of modern interior design. There are many more Keystone exclusives, like the Tru-Fit slide construction, the in-floor heating ducts, KeyTV, and much more to bring you a full-packed, luxury fifth wheel!
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