Cooksville Creek is an urban waterway flowing through Mississauga, Ontario, ultimately draining into Lake Ontario. The creek carries a warmwater thermal regime, distinguishing it from the cold-water trout streams found elsewhere in the region. With 16 fish species documented within its waters, Cooksville Creek offers a modest but genuine urban fishing experience, particularly in its lower reaches where fish can move freely from Lake Ontario. The creek flows through a heavily developed landscape, with much of its channel confined by retaining walls, though riparian vegetation including willows and Manitoba maples provides some canopy cover near the outlet. The lower section near Lake Ontario features slow-moving water with minimal aquatic vegetation, while upstream sections are influenced by various infrastructure crossings and erosion control structures.