Manmade Lake of the Prairies, the result of the construction of the Shellmouth Dam, fills a 67-km stretch of the Assiniboine River Valley. Campsites with electricity, fishing and houseboat rentals are available, and you can also trek along the self-guiding Ancient Valley Trail or enjoy the designated swimming area. The Trans Canada Trail follows the valley.

Lake of the Prairies is one of the premier walleye sport fisheries in North America. The annual catch of walleye from this lake has been as much as five times the provincial average. You can also expect good perch and northern pike fishing. Tackle and bait shops are plentiful. Ice fishing is popular here during the winter months.