Barrett Lake Cabin is a small rustic cabin sitting on the shores of Barrett Lake at approximately 1,800 metres elevation in the Selkirk Mountains, West Kootenay region of British Columbia.

The cabin is maintained by Recreation Sites and Trails BC as an emergency shelter.

It has been noted as recently rebuilt and furnished, though its availability for overnight use by the public is uncertain — at least one source indicates it is intended for recreational day use only.

The cabin serves as a waypoint for those exploring the area by snowmobile, ski touring, or quad, and lies along routes connecting to other backcountry destinations in the region.

Access to Barrett Lake is via Porto Rico Road off Highway 6, roughly 15 km south of Nelson, followed by a challenging drive or ride on progressively rougher terrain.