Lac la Biche has a total area of , including islands area. Owl River flows in the lake, and its waters are drained through the La Biche River and into the Athabasca River.

Sir Winston Churchill Provincial Park is located on an island of the lake. The town of Lac La Biche is located on the southern shore of the lake. The communities of Plamondon, Barnegat and Owl River are also located around Lac la Biche.

Since the lake and town share the same name (except for one capital letter), locals often (redundantly) refer to the lake as "Lac la Biche Lake" to distinguish it from the town.

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