Mountain Lake may refer to a location in North America:
Canada
Mountain Lake (Nova Scotia), in Halifax Regional Municipality
Mountain Lake (Ontario), several lakes
Mountain Lake (mine), a prospective uranium mine in the Northwest Territories
United States
Mountain Lake, Florida, a private community
Mountain Lake (Georgia), a lake near Georgia State Route 34
Mountain Lake (Cook County, Minnesota), a lake
Mountain Lake, Minnesota, a city in Cottonwood County
Mountain Lake Township, Cottonwood County, Minnesota
Mountain Lake, New Jersey, a community
Mountain Lake (New York), a lake in southern Adirondack Park in upstate New York
Mountain Lake (Delaware County, New York), a lake
Mountain Lake (Virginia), a lake where the exteriors for the 1987 movie Dirty Dancing were filmed Mountain Lake Park, in San Francisco