Lake Brompton (French: Lac Brompton) is a lake located in the watershed of the St-François River, in the Estrie region of Quebec, Canada.

[2] It is located partially in the Regional County Municipalities of Le Val-Saint-François and Memphrémagog.

When the Iroquois forced them from the Lake Ontario region, the Wendat migrated to Quebec.

While many ended up in the Quebec City region, some settled at the source of the current Salmon River, near Lake Brompton then known as Antoke Outunwitti.

The lake monster is said to be 6 feet (1.8 m) long, something resembling a mustache and an "evil-looking" head.