Lake Chauvet is located at an altitude of 1,162 metres; it was formed in the crater of a former volcano and is what is called a maar.
Almost perfectly circular in form it measures about 800 metres across and is 86 metres deep.
It was formed about 150,000 years ago and the contours around it have been eroded over time. It is larger but less deep than its neighbour Lake Pavin.
Bordered on half its circumference by a forest (the forest of Montbert); it is about 400 metres from the departmental road 203. This lake is managed by a private landowner.