Lough Ennell is a lake near the town of Mullingar, County Westmeath, Ireland. It is situated beside the N52 road, off the Mullingar/Kilbeggan road. The lake is part of the Lough Ennell Special Protection Area. It is 6.5 km (4.0 mi) long by 2 km (1.2 mi) wide, with an area of about 12 km2 (4.6 sq mi). Lough Ennell has a large area of shallow water with nearly two-thirds of its area being less than 25 feet and almost half of it being under 10 ft (3.0 m) deep. The lake produced Ireland's largest ever lake brown trout at 26 lbs (11.8 kg).