Churchill Meadows Leash-Free Dog Park at 5320 Ninth Line, Mississauga, ON L5M 0R5, Canada offers two distinct sectionsâone for smaller pups and another for bigger breeds, and water access keeps pups hydrated, and there’s good tree cover for hot afternoons, and regulars here are welcoming and their dogs are well-socialized. It gets muddy after rain, so plan accordingly.