Petit lac Ha! Ha! is a freshwater lake in the Ferland-et Boilleau municipality, in the administrative region of Saguenay-Lac-Saint-Jean, in the province of Quebec, in Canada. It is located on the east side of Lake Ha! Ha! into which it drains.

The Baie des Ha! Ha! is a particularly developed cove over a length of eleven kilometres on the Saguenay River in the region of Saguenay–Lac-Saint-Jean in Quebec, Canada. At the end of this natural corridor, which was originally called in French the "Grande Anse", then the "Grande Baie", there are the Ha! Ha! River and Rivière à Mars. According to the Second Saguenay theory, this vast depression is the extension of the fault and collapse ditch of the Kenogami Lake which is located upstream less than twenty kilometers.