Mont Saint-Grégoire (French pronunciation: [mɔ̃ sɛ̃ ɡʁeɡwaʁ]; height: 251 m (823 ft)) 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.

[1][2] 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.

It forms part of the vast Great Meteor hotspot track.

You can help Wikipedia by expanding it.This Quebec location article is a stub.