The Lake Louise is a lake in Estrie located in the municipality of Weedon, in the Les Appalaches Regional County Municipality (MRC), in the administrative region of Chaudière-Appalaches, in Quebec, in Canada.

Lake Louise is located in the Saint-François River valley just upstream of the confluence with the rivière au Saumon.

The Saint-François River is its main tributary and outlet; the lake is a widening of the river.

The rivière aux Canards also flows into it.