Lac de Maine, Artificial lake in Bouchemaine, France

Lac de Maine is an artificial lake dug around 1970 in the Maine district southwest of Angers. It was created from a gravel quarry worked between 1960 and 1969, and its name comes from the Maine river formed by the Mayenne, Loir and Sarthe. A green space for walks and picnics surrounds the water, and a pyramid built in 1969 on its banks houses a nautical base, a food point and meeting rooms.

The lake was dug in the late 1960s on the site of the Prairies d'Aloyaux, flood meadows used for livestock grazing until the 1960s. Its basin came from a gravel quarry worked between 1960 and 1969, whose aggregate raised the Saint-Serge district and supported the expansion of the Angers wholesale market. The excavated ground was then turned into a leisure lake.

The pyramid by the lake was built in 1969 and houses a nautical base, a food outlet and meeting rooms. Its slate roof was renovated from July 2017 after a budget of 2 million euros was voted in 2016. The lake's name comes from the Maine, the river formed by the Mayenne, Loir and Sarthe.

The lake lies southwest of Angers in the Maine district, with a green space laid out around the water for walks and picnics. The pyramid on the shore holds the nautical base, a food point and meeting rooms. Swimming has been banned at times, as in August 2018 over suspected toxic Woronichinia cyanobacteria.

The lake takes its name from the Maine, the river formed by the Mayenne, Loir and Sarthe in the Angevin low valleys before flowing into the Loire; the lake itself is not connected to it. The site was dug in a former gravel quarry worked between 1960 and 1969.