Shellmouth Reservoir, lake in Manitoba, Canada
Shellmouth Reservoir, also known as Lake of the Prairies, is a large artificial lake created by a dam across the Assiniboine River between Manitoba and Saskatchewan. The water stretches for about 56 kilometers and can store up to 480 million cubic meters, with dam structures and concrete spillways controlling water flow through gates and discharge mechanisms.
Construction of the dam began in 1964 and was completed in 1972 to control flooding along the Assiniboine River, particularly protecting Winnipeg. The structure proved effective during major flood events like 1997, when it held back significant water volumes and prevented damage to downstream communities.
The name Lake of the Prairies reflects how local communities value this water body as a focal point for outdoor activities and gathering. Visitors and residents use the shoreline for walks, fishing, and quiet moments, making it a meaningful place in regional life.
The lake is easily accessible and offers calm conditions for fishing, boating, and nature observation, especially during warmer months when water levels are stable. Nearby Asessippi Provincial Park and shoreline facilities provide various ways to explore and relax in the area.
The lake carries the alternate name Lake of the Prairies, reflecting its importance to the vast prairie regions around it. It is also home to the rock bass, Saskatchewan's only native bass species, found naturally nowhere else in the province.
The community of curious travelers
AroundUs brings together thousands of curated places, local tips, and hidden gems, enriched daily by 60,000 contributors worldwide.
