Milne Hollow is a 50-hectare (120-acre) valley site in Toronto, Ontario, Canada within the valley of the East Don River. It is located in north-west central Toronto where the Don Valley Parkway intersects with Lawrence Avenue East. It was the location of pioneer Alexander Milne's mill town known as Milnesford Mills and his homestead farm. Today it is dominated by transportation uses, (including two rail lines, an expressway and an arterial road) with parkland alongside. The parkland has seen recent naturalization efforts by the City of Toronto government and volunteer organizations, including the opening of the East Don Trail in 2012.