 To the north lies the Saskatchewan River, and its associated lowlands, which where once covered by prehistoric Lake Saskatchewan which may have been a bay off of Lake Agassiz.To the west lies Aspen Parkland which was a sparse deciduous forest until the 20th century, but today has been cleared to make way for farmland.To the south lies the Assiniboine and Souris River valleys, which were once covered by Lake Souris, which may have been a bay off of Lake Agassiz.