# Keystone Avalanche 366LS

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

## Specs (2025 model year)

| Spec | Value |
| --- | --- |
| Length | 40 ft 10 in |
| Sleeps | 4 |
| Slide-outs | 5 |

## Model years

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

## Inventory

7 units currently for sale priced $69,977 to $88,995: https://rvenvy.com/fifth-wheel-trailers/keystone/avalanche/366ls/inventory

Floor plan diagram: https://images.rvenvy.com/fa01ed2a507841ba2dbb65226a61e686047dfd8f21ef1c325b71394b868fe7f3/1024.webp

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