Mont Saint-Grégoire (; height: ) is a mountain in the Montérégie region of southern Quebec, Canada. It is composed of essexite and syenite, strongly contrasting with the surrounding sedimentary rocks. The area around Mont Saint-Grégoire is known for its maple syrup production, as well as some wine production.
The name was changed in 1923 from Mount Johnson . Mont Saint-Grégoire was named in honour of Pope Gregory I, who was also known as Gregory the Great.
Geology
It is thought that Mont Saint-Grégoire might be the deep extension of a vastly eroded ancient volcanic complex, which was probably active about 125 million years ago. The mountain was created when the North American Plate moved westward over the New England hotspot,