Cook's Bay is the southernmost bay of Lake Simcoe in Ontario, Canada. It is about 60 kilometres north of Toronto. The bay has some of the best fishing areas in North America, especially for yellow perch. The town of Keswick is the largest area that the bay has access to. Many marinas and motel accommodations are available. Many cottages are also present on the shores of the Northern half of the bay on both sides.
Cook's Bay was named by John Graves Simcoe, the Lieutenant-Governor of Upper Canada, for James Cook, who had served as Master aboard the HMS Pembroke in 1759 under the command of Captain John Simcoe, the Lieutenant-Governor's father.
Cook's Bay is southern Ontario's year round playground attracting locals and visitors from hundreds of miles away. For an inland lake it has the most consistent winds year round in Ontario and attracts windsurfers and kiters in all four seasons to play on the water and the ice.