West Duffins Creek is a 41-kilometer tributary of the Duffins Creek watershed in Ontario, Canada, flowing through a landscape shaped by the Oak Ridges Moraine and the Iroquois Plain. The creek winds through a richly forested riparian corridor, best appreciated from vantage points like the West Duffins Creek Lookout along the Seaton Hiking Trail in Pickering. The watershed encompasses municipalities including Pickering, Uxbridge, Markham, and Whitchurch-Stouffville, and the creek supports a diverse fish community that draws anglers from across the Greater Toronto Area. A key structural feature shaping the fishery is the Whitevale Dam, which divides the creek into two distinct fishing zones — a lower section accessible to migratory species and an upper section that harbors resident brook trout populations.