Square Lake is a small 12–13. 5-hectare lake situated within Crooked River Provincial Park in British Columbia, roughly an hour's drive from Prince George.

It is a hike-in-only destination, reached by an easy approximately 30-minute walk from the parking area at the western end of Bear Lake.

The lake is well known among anglers for consistently good catch rates of rainbow trout stocked by the Freshwater Fisheries Society of BC. Float tubes are a popular way to fish the water, and a dock is also present for shore-based angling.

The surrounding provincial park provides campsites and day-use facilities.