The Holland Marsh is a wetland and agricultural area in Ontario, Canada, about 50 kilometres (31 mi) north of Toronto.[1] It lies entirely within the valley of the Holland River, stretching from the northern edge of the Oak Ridges Moraine near Schomberg to the river mouth at Cook's Bay, Lake Simcoe. In its entirety it comprises about 21,000 acres (8,500 hectares), with two distinct divisions.[2] Historically it has simply been referred to as "the marsh".
The first area to be drained and reclaimed for farming is a 7,200-acre (2,915-hectare) municipally drained polder south-west of the town of Bradford proper,[2] of which 40% lies in King Township (York Region) and 60% in the town of Bradford West Gwillimbury (Simcoe County).
The other 13,800 acres (5,585 hectares) lie north and east of Bradford, fringing Cook's Bay in the towns of Innisfil and East Gwillimbury.[2] Portions of this area have been privately reclaimed for farming, such as the Ravenshoe Road and Bradford Marsh areas, and portions are recreational or undisturbed wetland. In some cases, recreational boating, wetland and agricultural areas intersect.