Molson Lake is a lake in Northern Region, Manitoba, Canada and the source of the Hayes River. It is located about 60 km northeast of the community of Norway House. The lake is 45 km long and 22 km wide, has an area of 400 km2, and lies at an elevation of 221 m. The primary inflows are the Molson River and Keepeewiskawakun River at the south, and the primary outflow is the Hayes River at the north of the lake, which heads towards Robinson Lake. Molson Lake Airport is on the north shore of the lake at the west end.

Tributaries

Counterclockwise from the Hayes River outlet