Grindstone Creek is a productive stream flowing through Burlington and Hamilton in Ontario, Canada, draining a diverse landscape that ranges from the wetland headwaters of Hayesland Swamp above the Niagara Escarpment down through urban and suburban terrain to its estuary at Hamilton Harbour on Lake Ontario. This geographic diversity creates dramatically different fishing experiences depending on where you fish — from warm-water swamp fisheries in the upper reaches to a dynamic migratory fishery in the lower sections. The creek's connection to Lake Ontario makes it a notable destination for anglers targeting both resident warm-water species and seasonal runs of migratory fish, drawing fishing pressure from the surrounding Hamilton and Burlington communities.