Carhagouha was a settlement of the Huron/Wendat people. The place near where it is thought to have existed, near present-day Lafontaine, Ontario, Canada, is commemorated with a historical marker. Carhagouha was the site of the first Catholic Mass celebrated in what is now Ontario, on August 12 (or June 24), 1615, by Fr. Joseph Le Caron (member of the Recollets order) in the presence of French explorer, Samuel de Champlain, and the Wendat.
Each year a Mass is celebrated to mark the anniversary. The exact place is not precisely known.