# Keystone Alpine Avalanche 366LS

> Rear kitchen, front bedroom, L-couch, desk, walk-thru bath

366LS is a fifth wheel floor plan by Alpine Avalanche (Keystone).

## Specs (2025 model year)

| Spec | Value |
| --- | --- |
| Length | 40 ft 10 in |
| Sleeps | 4 |
| Slide-outs | 0 |
| MSRP | $122,585 |

## Model years

2025. Year-specific specs: `https://rvenvy.com/fifth-wheel-trailers/keystone/alpine-avalanche/366ls?year={year}`

## Overview

Putting the kitchen at the rear and the bedroom up front is a deliberate full-timer's choice, and the 366LS commits to it fully — you get a massive kitchen island, an 18 cu. ft. residential fridge, and rear windows that make cooking feel anything but cramped. The front King bed has a walk-thru bath on one side and a full-length mirror on the other, with washer/dryer prep already roughed in. Five slides open the whole thing up, and a dedicated desk means working from the road doesn't mean working from the couch — though the L-couch is there when you want it. Keystone's Alpine line is built for four-season living with serious insulation, and the Avalanche Edition layers on upgraded finishes that match the price point.

## Floor plan tags

walk-thru bath, desk, L-couch, front bedroom, rear kitchen

## Inventory

No units currently for sale. Search similar inventory: https://rvenvy.com/inventory

Floor plan diagram: https://images.rvenvy.com/6cc190a00b9b83b6002fec250880af2c5c55ecfac6df781dfd9bed61fe5c4bd2/1024.webp

Canonical page: https://rvenvy.com/fifth-wheel-trailers/keystone/alpine-avalanche/366ls